[PATCH v2 0/3] Add device tree probe for sdhci-esdhc-imx

STALE5505d

Revision v2 of 3 in this series.

10 messages, 4 authors, 2011-07-07 · open the first message on its own page

[PATCH v2 0/3] Add device tree probe for sdhci-esdhc-imx

From: Shawn Guo <hidden>
Date: 2011-07-05 15:26:05

The first patch removes the uses of cpu_is_mx(), the second one makes
a dt related fix on sdhci-pltfm.c, and the third one adds device tree
probe for sdhci-esdhc-imx driver.

Changes since v1:
 * Address review comments given by Grant

Shawn Guo (3):
      mmc: sdhci-esdhc-imx: get rid of the uses of cpu_is_mx()
      mmc: sdhci-pltfm: dt device does not pass parent to sdhci_alloc_host
      mmc: sdhci-esdhc-imx: add device tree probe support

 .../devicetree/bindings/mmc/fsl-imx-esdhc.txt      |   40 ++++++
 arch/arm/mach-imx/clock-imx25.c                    |    4 +-
 arch/arm/mach-imx/clock-imx35.c                    |    6 +-
 arch/arm/mach-mx5/clock-mx51-mx53.c                |   16 +-
 arch/arm/mach-mx5/mx51_efika.c                     |    4 +-
 .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   17 ++-
 arch/arm/plat-mxc/include/mach/devices-common.h    |    1 +
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  144 ++++++++++++++++++--
 drivers/mmc/host/sdhci-pltfm.c                     |    3 +-
 9 files changed, 202 insertions(+), 33 deletions(-)

[PATCH v2 1/3] mmc: sdhci-esdhc-imx: get rid of the uses of cpu_is_mx()

From: Shawn Guo <hidden>
Date: 2011-07-05 15:26:06

The patch removes all the uses of cpu_is_mx().  Instead, it utilizes
platform_device_id to distinguish the esdhc differences among SoCs.

Signed-off-by: Shawn Guo <redacted>
Cc: Wolfram Sang <redacted>
Cc: Chris Ball <redacted>
---
 arch/arm/mach-imx/clock-imx25.c                    |    4 +-
 arch/arm/mach-imx/clock-imx35.c                    |    6 +-
 arch/arm/mach-mx5/clock-mx51-mx53.c                |   16 +++---
 arch/arm/mach-mx5/mx51_efika.c                     |    4 +-
 .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   17 +++---
 arch/arm/plat-mxc/include/mach/devices-common.h    |    1 +
 drivers/mmc/host/sdhci-esdhc-imx.c                 |   60 ++++++++++++++++++-
 7 files changed, 81 insertions(+), 27 deletions(-)

diff --git a/arch/arm/mach-imx/clock-imx25.c b/arch/arm/mach-imx/clock-imx25.c
index a65838f..2955afa 100644
--- a/arch/arm/mach-imx/clock-imx25.c
+++ b/arch/arm/mach-imx/clock-imx25.c

@@ -300,8 +300,8 @@ static struct clk_lookup lookups[] = {
 	_REGISTER_CLOCK("imx2-wdt.0", NULL, wdt_clk)
 	_REGISTER_CLOCK("imx-ssi.0", NULL, ssi1_clk)
 	_REGISTER_CLOCK("imx-ssi.1", NULL, ssi2_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx25.0", NULL, esdhc1_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx25.1", NULL, esdhc2_clk)
 	_REGISTER_CLOCK("mx2-camera.0", NULL, csi_clk)
 	_REGISTER_CLOCK(NULL, "audmux", audmux_clk)
 	_REGISTER_CLOCK("flexcan.0", NULL, can1_clk)

diff --git a/arch/arm/mach-imx/clock-imx35.c b/arch/arm/mach-imx/clock-imx35.c
index 5a4cc1e..2f80f14 100644
--- a/arch/arm/mach-imx/clock-imx35.c
+++ b/arch/arm/mach-imx/clock-imx35.c

@@ -458,9 +458,9 @@ static struct clk_lookup lookups[] = {
 	_REGISTER_CLOCK("imx-epit.0", NULL, epit1_clk)
 	_REGISTER_CLOCK("imx-epit.1", NULL, epit2_clk)
 	_REGISTER_CLOCK(NULL, "esai", esai_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx35.0", NULL, esdhc1_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx35.1", NULL, esdhc2_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx35.2", NULL, esdhc3_clk)
 	_REGISTER_CLOCK("fec.0", NULL, fec_clk)
 	_REGISTER_CLOCK(NULL, "gpio", gpio1_clk)
 	_REGISTER_CLOCK(NULL, "gpio", gpio2_clk)

diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
index 699b0d2..fd60e2c 100644
--- a/arch/arm/mach-mx5/clock-mx51-mx53.c
+++ b/arch/arm/mach-mx5/clock-mx51-mx53.c

@@ -1453,10 +1453,10 @@ static struct clk_lookup mx51_lookups[] = {
 	_REGISTER_CLOCK("imx51-ecspi.0", NULL, ecspi1_clk)
 	_REGISTER_CLOCK("imx51-ecspi.1", NULL, ecspi2_clk)
 	_REGISTER_CLOCK("imx51-cspi.0", NULL, cspi_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.3", NULL, esdhc4_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx51.0", NULL, esdhc1_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx51.1", NULL, esdhc2_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx51.2", NULL, esdhc3_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx51.3", NULL, esdhc4_clk)
 	_REGISTER_CLOCK(NULL, "cpu_clk", cpu_clk)
 	_REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
 	_REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk)

@@ -1480,10 +1480,10 @@ static struct clk_lookup mx53_lookups[] = {
 	_REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
 	_REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
 	_REGISTER_CLOCK("imx-i2c.2", NULL, i2c3_mx53_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_mx53_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_mx53_clk)
-	_REGISTER_CLOCK("sdhci-esdhc-imx.3", NULL, esdhc4_mx53_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx53.0", NULL, esdhc1_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx53.1", NULL, esdhc2_mx53_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx53.2", NULL, esdhc3_mx53_clk)
+	_REGISTER_CLOCK("sdhci-esdhc-imx53.3", NULL, esdhc4_mx53_clk)
 	_REGISTER_CLOCK("imx53-ecspi.0", NULL, ecspi1_clk)
 	_REGISTER_CLOCK("imx53-ecspi.1", NULL, ecspi2_clk)
 	_REGISTER_CLOCK("imx53-cspi.0", NULL, cspi_clk)

diff --git a/arch/arm/mach-mx5/mx51_efika.c b/arch/arm/mach-mx5/mx51_efika.c
index 56739c2..4435e03 100644
--- a/arch/arm/mach-mx5/mx51_efika.c
+++ b/arch/arm/mach-mx5/mx51_efika.c

@@ -260,8 +260,8 @@ static struct regulator_consumer_supply vvideo_consumers[] = {
 };
 
 static struct regulator_consumer_supply vsd_consumers[] = {
-	REGULATOR_SUPPLY("vmmc", "sdhci-esdhc-imx.0"),
-	REGULATOR_SUPPLY("vmmc", "sdhci-esdhc-imx.1"),
+	REGULATOR_SUPPLY("vmmc", "sdhci-esdhc-imx51.0"),
+	REGULATOR_SUPPLY("vmmc", "sdhci-esdhc-imx51.1"),
 };
 
 static struct regulator_consumer_supply pwgt1_consumer[] = {

diff --git a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
index 79d6d71..5955f5d 100644
--- a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
+++ b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c

@@ -10,21 +10,22 @@
 #include <mach/devices-common.h>
 #include <mach/esdhc.h>
 
-#define imx_sdhci_esdhc_imx_data_entry_single(soc, _id, hwid) \
+#define imx_sdhci_esdhc_imx_data_entry_single(soc, _devid, _id, hwid) \
 	{								\
+		.devid = _devid,					\
 		.id = _id,						\
 		.iobase = soc ## _ESDHC ## hwid ## _BASE_ADDR,	\
 		.irq = soc ## _INT_ESDHC ## hwid,			\
 	}
 
-#define imx_sdhci_esdhc_imx_data_entry(soc, id, hwid)	\
-	[id] = imx_sdhci_esdhc_imx_data_entry_single(soc, id, hwid)
+#define imx_sdhci_esdhc_imx_data_entry(soc, devid, id, hwid)	\
+	[id] = imx_sdhci_esdhc_imx_data_entry_single(soc, devid, id, hwid)
 
 #ifdef CONFIG_SOC_IMX25
 const struct imx_sdhci_esdhc_imx_data
 imx25_sdhci_esdhc_imx_data[] __initconst = {
 #define imx25_sdhci_esdhc_imx_data_entry(_id, _hwid)			\
-	imx_sdhci_esdhc_imx_data_entry(MX25, _id, _hwid)
+	imx_sdhci_esdhc_imx_data_entry(MX25, "sdhci-esdhc-imx25", _id, _hwid)
 	imx25_sdhci_esdhc_imx_data_entry(0, 1),
 	imx25_sdhci_esdhc_imx_data_entry(1, 2),
 };

@@ -34,7 +35,7 @@ imx25_sdhci_esdhc_imx_data[] __initconst = {
 const struct imx_sdhci_esdhc_imx_data
 imx35_sdhci_esdhc_imx_data[] __initconst = {
 #define imx35_sdhci_esdhc_imx_data_entry(_id, _hwid)			\
-	imx_sdhci_esdhc_imx_data_entry(MX35, _id, _hwid)
+	imx_sdhci_esdhc_imx_data_entry(MX35, "sdhci-esdhc-imx35", _id, _hwid)
 	imx35_sdhci_esdhc_imx_data_entry(0, 1),
 	imx35_sdhci_esdhc_imx_data_entry(1, 2),
 	imx35_sdhci_esdhc_imx_data_entry(2, 3),

@@ -45,7 +46,7 @@ imx35_sdhci_esdhc_imx_data[] __initconst = {
 const struct imx_sdhci_esdhc_imx_data
 imx51_sdhci_esdhc_imx_data[] __initconst = {
 #define imx51_sdhci_esdhc_imx_data_entry(_id, _hwid)			\
-	imx_sdhci_esdhc_imx_data_entry(MX51, _id, _hwid)
+	imx_sdhci_esdhc_imx_data_entry(MX51, "sdhci-esdhc-imx51", _id, _hwid)
 	imx51_sdhci_esdhc_imx_data_entry(0, 1),
 	imx51_sdhci_esdhc_imx_data_entry(1, 2),
 	imx51_sdhci_esdhc_imx_data_entry(2, 3),

@@ -57,7 +58,7 @@ imx51_sdhci_esdhc_imx_data[] __initconst = {
 const struct imx_sdhci_esdhc_imx_data
 imx53_sdhci_esdhc_imx_data[] __initconst = {
 #define imx53_sdhci_esdhc_imx_data_entry(_id, _hwid)			\
-	imx_sdhci_esdhc_imx_data_entry(MX53, _id, _hwid)
+	imx_sdhci_esdhc_imx_data_entry(MX53, "sdhci-esdhc-imx53", _id, _hwid)
 	imx53_sdhci_esdhc_imx_data_entry(0, 1),
 	imx53_sdhci_esdhc_imx_data_entry(1, 2),
 	imx53_sdhci_esdhc_imx_data_entry(2, 3),

@@ -93,6 +94,6 @@ struct platform_device *__init imx_add_sdhci_esdhc_imx(
 	if (!pdata)
 		pdata = &default_esdhc_pdata;
 
-	return imx_add_platform_device("sdhci-esdhc-imx", data->id, res,
+	return imx_add_platform_device(data->devid, data->id, res,
 			ARRAY_SIZE(res), pdata, sizeof(*pdata));
 }

diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
index bf93820..c9e7b66 100644
--- a/arch/arm/plat-mxc/include/mach/devices-common.h
+++ b/arch/arm/plat-mxc/include/mach/devices-common.h

@@ -276,6 +276,7 @@ struct platform_device *__init imx_add_mxc_w1(
 
 #include <mach/esdhc.h>
 struct imx_sdhci_esdhc_imx_data {
+	const char *devid;
 	int id;
 	resource_size_t iobase;
 	resource_size_t irq;

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 3cc6f61..1edda29 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c

@@ -20,7 +20,6 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/sdio.h>
-#include <mach/hardware.h>
 #include <mach/esdhc.h>
 #include "sdhci-pltfm.h"
 #include "sdhci-esdhc.h"

@@ -42,11 +41,57 @@
  */
 #define ESDHC_FLAG_MULTIBLK_NO_INT	(1 << 1)
 
+enum imx_esdhc_type {
+	IMX25_ESDHC,
+	IMX35_ESDHC,
+	IMX51_ESDHC,
+	IMX53_ESDHC,
+};
+
 struct pltfm_imx_data {
 	int flags;
 	u32 scratchpad;
+	enum imx_esdhc_type devtype;
+};
+
+static struct platform_device_id imx_esdhc_devtype[] = {
+	{
+		.name = "sdhci-esdhc-imx25",
+		.driver_data = IMX25_ESDHC,
+	}, {
+		.name = "sdhci-esdhc-imx35",
+		.driver_data = IMX35_ESDHC,
+	}, {
+		.name = "sdhci-esdhc-imx51",
+		.driver_data = IMX51_ESDHC,
+	}, {
+		.name = "sdhci-esdhc-imx53",
+		.driver_data = IMX53_ESDHC,
+	}, {
+		/* sentinel */
+	}
 };
 
+static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
+{
+	return data->devtype == IMX25_ESDHC;
+}
+
+static inline int is_imx35_esdhc(struct pltfm_imx_data *data)
+{
+	return data->devtype == IMX35_ESDHC;
+}
+
+static inline int is_imx51_esdhc(struct pltfm_imx_data *data)
+{
+	return data->devtype == IMX51_ESDHC;
+}
+
+static inline int is_imx53_esdhc(struct pltfm_imx_data *data)
+{
+	return data->devtype == IMX53_ESDHC;
+}
+
 static unsigned int esdhc_pltfm_get_max_blk_size(struct sdhci_host *host)
 {
 	/* Force 2048 bytes, which is the maximum supported size in SDHCI. */

@@ -55,8 +100,12 @@ static unsigned int esdhc_pltfm_get_max_blk_size(struct sdhci_host *host)
 
 static unsigned int esdhc_pltfm_get_max_blk_count(struct sdhci_host *host)
 {
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+
 	/* Fix errata ENGcm07207 which is present on i.MX25 and i.MX35 */
-	return (cpu_is_mx25() || cpu_is_mx35()) ? 1 : 65535;
+	return (is_imx25_esdhc(imx_data) || is_imx35_esdhc(imx_data)) ?
+		1 : 65535;
 }
 
 static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)

@@ -274,6 +323,8 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 	imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
 	if (!imx_data)
 		return -ENOMEM;
+
+	imx_data->devtype = pdev->id_entry->driver_data;
 	pltfm_host->priv = imx_data;
 
 	clk = clk_get(mmc_dev(host->mmc), NULL);

@@ -285,10 +336,10 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 	clk_enable(clk);
 	pltfm_host->clk = clk;
 
-	if (!cpu_is_mx25())
+	if (!is_imx25_esdhc(imx_data))
 		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 
-	if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
+	if (is_imx53_esdhc(imx_data))
 		imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
 
 	boarddata = host->mmc->parent->platform_data;

@@ -401,6 +452,7 @@ static struct platform_driver sdhci_esdhc_imx_driver = {
 		.name	= "sdhci-esdhc-imx",
 		.owner	= THIS_MODULE,
 	},
+	.id_table	= imx_esdhc_devtype,
 	.probe		= sdhci_esdhc_imx_probe,
 	.remove		= __devexit_p(sdhci_esdhc_imx_remove),
 #ifdef CONFIG_PM

-- 
1.7.4.1

Re: [PATCH v2 1/3] mmc: sdhci-esdhc-imx: get rid of the uses of cpu_is_mx()

From: Grant Likely <hidden>
Date: 2011-07-05 17:47:30

On Tue, Jul 5, 2011 at 9:26 AM, Shawn Guo [off-list ref] wrote:

The patch removes all the uses of cpu_is_mx().  Instead, it utilizes
platform_device_id to distinguish the esdhc differences among SoCs.

Signed-off-by: Shawn Guo <redacted>
Cc: Wolfram Sang <redacted>
Cc: Chris Ball <redacted>

Acked-by: Grant Likely <redacted>

quoted hunk

---
 arch/arm/mach-imx/clock-imx25.c                    |    4 +-
 arch/arm/mach-imx/clock-imx35.c                    |    6 +-
 arch/arm/mach-mx5/clock-mx51-mx53.c                |   16 +++---
 arch/arm/mach-mx5/mx51_efika.c                     |    4 +-
 .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   17 +++---
 arch/arm/plat-mxc/include/mach/devices-common.h    |    1 +
 drivers/mmc/host/sdhci-esdhc-imx.c                 |   60 ++++++++++++++++++-
 7 files changed, 81 insertions(+), 27 deletions(-)

diff --git a/arch/arm/mach-imx/clock-imx25.c b/arch/arm/mach-imx/clock-imx25.c
index a65838f..2955afa 100644
--- a/arch/arm/mach-imx/clock-imx25.c
+++ b/arch/arm/mach-imx/clock-imx25.c

@@ -300,8 +300,8 @@ static struct clk_lookup lookups[] = {

       _REGISTER_CLOCK("imx2-wdt.0", NULL, wdt_clk)
       _REGISTER_CLOCK("imx-ssi.0", NULL, ssi1_clk)
       _REGISTER_CLOCK("imx-ssi.1", NULL, ssi2_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx25.0", NULL, esdhc1_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx25.1", NULL, esdhc2_clk)
       _REGISTER_CLOCK("mx2-camera.0", NULL, csi_clk)
       _REGISTER_CLOCK(NULL, "audmux", audmux_clk)
       _REGISTER_CLOCK("flexcan.0", NULL, can1_clk)

diff --git a/arch/arm/mach-imx/clock-imx35.c b/arch/arm/mach-imx/clock-imx35.c
index 5a4cc1e..2f80f14 100644
--- a/arch/arm/mach-imx/clock-imx35.c
+++ b/arch/arm/mach-imx/clock-imx35.c

@@ -458,9 +458,9 @@ static struct clk_lookup lookups[] = {

       _REGISTER_CLOCK("imx-epit.0", NULL, epit1_clk)
       _REGISTER_CLOCK("imx-epit.1", NULL, epit2_clk)
       _REGISTER_CLOCK(NULL, "esai", esai_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx35.0", NULL, esdhc1_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx35.1", NULL, esdhc2_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx35.2", NULL, esdhc3_clk)
       _REGISTER_CLOCK("fec.0", NULL, fec_clk)
       _REGISTER_CLOCK(NULL, "gpio", gpio1_clk)
       _REGISTER_CLOCK(NULL, "gpio", gpio2_clk)

diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
index 699b0d2..fd60e2c 100644
--- a/arch/arm/mach-mx5/clock-mx51-mx53.c
+++ b/arch/arm/mach-mx5/clock-mx51-mx53.c

@@ -1453,10 +1453,10 @@ static struct clk_lookup mx51_lookups[] = {

       _REGISTER_CLOCK("imx51-ecspi.0", NULL, ecspi1_clk)
       _REGISTER_CLOCK("imx51-ecspi.1", NULL, ecspi2_clk)
       _REGISTER_CLOCK("imx51-cspi.0", NULL, cspi_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.3", NULL, esdhc4_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx51.0", NULL, esdhc1_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx51.1", NULL, esdhc2_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx51.2", NULL, esdhc3_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx51.3", NULL, esdhc4_clk)
       _REGISTER_CLOCK(NULL, "cpu_clk", cpu_clk)
       _REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
       _REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk)

@@ -1480,10 +1480,10 @@ static struct clk_lookup mx53_lookups[] = {

       _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
       _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
       _REGISTER_CLOCK("imx-i2c.2", NULL, i2c3_mx53_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_mx53_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_mx53_clk)
-       _REGISTER_CLOCK("sdhci-esdhc-imx.3", NULL, esdhc4_mx53_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx53.0", NULL, esdhc1_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx53.1", NULL, esdhc2_mx53_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx53.2", NULL, esdhc3_mx53_clk)
+       _REGISTER_CLOCK("sdhci-esdhc-imx53.3", NULL, esdhc4_mx53_clk)
       _REGISTER_CLOCK("imx53-ecspi.0", NULL, ecspi1_clk)
       _REGISTER_CLOCK("imx53-ecspi.1", NULL, ecspi2_clk)
       _REGISTER_CLOCK("imx53-cspi.0", NULL, cspi_clk)

diff --git a/arch/arm/mach-mx5/mx51_efika.c b/arch/arm/mach-mx5/mx51_efika.c
index 56739c2..4435e03 100644
--- a/arch/arm/mach-mx5/mx51_efika.c
+++ b/arch/arm/mach-mx5/mx51_efika.c

@@ -260,8 +260,8 @@ static struct regulator_consumer_supply vvideo_consumers[] = {

 };

 static struct regulator_consumer_supply vsd_consumers[] = {
-       REGULATOR_SUPPLY("vmmc", "sdhci-esdhc-imx.0"),
-       REGULATOR_SUPPLY("vmmc", "sdhci-esdhc-imx.1"),
+       REGULATOR_SUPPLY("vmmc", "sdhci-esdhc-imx51.0"),
+       REGULATOR_SUPPLY("vmmc", "sdhci-esdhc-imx51.1"),
 };

 static struct regulator_consumer_supply pwgt1_consumer[] = {

diff --git a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
index 79d6d71..5955f5d 100644
--- a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
+++ b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c

@@ -10,21 +10,22 @@

 #include <mach/devices-common.h>
 #include <mach/esdhc.h>

-#define imx_sdhci_esdhc_imx_data_entry_single(soc, _id, hwid) \
+#define imx_sdhci_esdhc_imx_data_entry_single(soc, _devid, _id, hwid) \
       {                                                               \
+               .devid = _devid,                                        \
               .id = _id,                                              \
               .iobase = soc ## _ESDHC ## hwid ## _BASE_ADDR,  \
               .irq = soc ## _INT_ESDHC ## hwid,                       \
       }

-#define imx_sdhci_esdhc_imx_data_entry(soc, id, hwid)  \
-       [id] = imx_sdhci_esdhc_imx_data_entry_single(soc, id, hwid)
+#define imx_sdhci_esdhc_imx_data_entry(soc, devid, id, hwid)   \
+       [id] = imx_sdhci_esdhc_imx_data_entry_single(soc, devid, id, hwid)

 #ifdef CONFIG_SOC_IMX25
 const struct imx_sdhci_esdhc_imx_data
 imx25_sdhci_esdhc_imx_data[] __initconst = {
 #define imx25_sdhci_esdhc_imx_data_entry(_id, _hwid)                   \
-       imx_sdhci_esdhc_imx_data_entry(MX25, _id, _hwid)
+       imx_sdhci_esdhc_imx_data_entry(MX25, "sdhci-esdhc-imx25", _id, _hwid)
       imx25_sdhci_esdhc_imx_data_entry(0, 1),
       imx25_sdhci_esdhc_imx_data_entry(1, 2),
 };

@@ -34,7 +35,7 @@ imx25_sdhci_esdhc_imx_data[] __initconst = {

 const struct imx_sdhci_esdhc_imx_data
 imx35_sdhci_esdhc_imx_data[] __initconst = {
 #define imx35_sdhci_esdhc_imx_data_entry(_id, _hwid)                   \
-       imx_sdhci_esdhc_imx_data_entry(MX35, _id, _hwid)
+       imx_sdhci_esdhc_imx_data_entry(MX35, "sdhci-esdhc-imx35", _id, _hwid)
       imx35_sdhci_esdhc_imx_data_entry(0, 1),
       imx35_sdhci_esdhc_imx_data_entry(1, 2),
       imx35_sdhci_esdhc_imx_data_entry(2, 3),

@@ -45,7 +46,7 @@ imx35_sdhci_esdhc_imx_data[] __initconst = {

 const struct imx_sdhci_esdhc_imx_data
 imx51_sdhci_esdhc_imx_data[] __initconst = {
 #define imx51_sdhci_esdhc_imx_data_entry(_id, _hwid)                   \
-       imx_sdhci_esdhc_imx_data_entry(MX51, _id, _hwid)
+       imx_sdhci_esdhc_imx_data_entry(MX51, "sdhci-esdhc-imx51", _id, _hwid)
       imx51_sdhci_esdhc_imx_data_entry(0, 1),
       imx51_sdhci_esdhc_imx_data_entry(1, 2),
       imx51_sdhci_esdhc_imx_data_entry(2, 3),

@@ -57,7 +58,7 @@ imx51_sdhci_esdhc_imx_data[] __initconst = {

 const struct imx_sdhci_esdhc_imx_data
 imx53_sdhci_esdhc_imx_data[] __initconst = {
 #define imx53_sdhci_esdhc_imx_data_entry(_id, _hwid)                   \
-       imx_sdhci_esdhc_imx_data_entry(MX53, _id, _hwid)
+       imx_sdhci_esdhc_imx_data_entry(MX53, "sdhci-esdhc-imx53", _id, _hwid)
       imx53_sdhci_esdhc_imx_data_entry(0, 1),
       imx53_sdhci_esdhc_imx_data_entry(1, 2),
       imx53_sdhci_esdhc_imx_data_entry(2, 3),

@@ -93,6 +94,6 @@ struct platform_device *__init imx_add_sdhci_esdhc_imx(

       if (!pdata)
               pdata = &default_esdhc_pdata;

-       return imx_add_platform_device("sdhci-esdhc-imx", data->id, res,
+       return imx_add_platform_device(data->devid, data->id, res,
                       ARRAY_SIZE(res), pdata, sizeof(*pdata));
 }

diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
index bf93820..c9e7b66 100644
--- a/arch/arm/plat-mxc/include/mach/devices-common.h
+++ b/arch/arm/plat-mxc/include/mach/devices-common.h

@@ -276,6 +276,7 @@ struct platform_device *__init imx_add_mxc_w1(

 #include <mach/esdhc.h>
 struct imx_sdhci_esdhc_imx_data {
+       const char *devid;
       int id;
       resource_size_t iobase;
       resource_size_t irq;

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 3cc6f61..1edda29 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c

@@ -20,7 +20,6 @@

 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/sdio.h>
-#include <mach/hardware.h>
 #include <mach/esdhc.h>
 #include "sdhci-pltfm.h"
 #include "sdhci-esdhc.h"

@@ -42,11 +41,57 @@

 */
 #define ESDHC_FLAG_MULTIBLK_NO_INT     (1 << 1)

+enum imx_esdhc_type {
+       IMX25_ESDHC,
+       IMX35_ESDHC,
+       IMX51_ESDHC,
+       IMX53_ESDHC,
+};
+
 struct pltfm_imx_data {
       int flags;
       u32 scratchpad;
+       enum imx_esdhc_type devtype;
+};
+
+static struct platform_device_id imx_esdhc_devtype[] = {
+       {
+               .name = "sdhci-esdhc-imx25",
+               .driver_data = IMX25_ESDHC,
+       }, {
+               .name = "sdhci-esdhc-imx35",
+               .driver_data = IMX35_ESDHC,
+       }, {
+               .name = "sdhci-esdhc-imx51",
+               .driver_data = IMX51_ESDHC,
+       }, {
+               .name = "sdhci-esdhc-imx53",
+               .driver_data = IMX53_ESDHC,
+       }, {
+               /* sentinel */
+       }
 };

+static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
+{
+       return data->devtype == IMX25_ESDHC;
+}
+
+static inline int is_imx35_esdhc(struct pltfm_imx_data *data)
+{
+       return data->devtype == IMX35_ESDHC;
+}
+
+static inline int is_imx51_esdhc(struct pltfm_imx_data *data)
+{
+       return data->devtype == IMX51_ESDHC;
+}
+
+static inline int is_imx53_esdhc(struct pltfm_imx_data *data)
+{
+       return data->devtype == IMX53_ESDHC;
+}
+
 static unsigned int esdhc_pltfm_get_max_blk_size(struct sdhci_host *host)
 {
       /* Force 2048 bytes, which is the maximum supported size in SDHCI. */

@@ -55,8 +100,12 @@ static unsigned int esdhc_pltfm_get_max_blk_size(struct sdhci_host *host)

 static unsigned int esdhc_pltfm_get_max_blk_count(struct sdhci_host *host)
 {
+       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+       struct pltfm_imx_data *imx_data = pltfm_host->priv;
+
       /* Fix errata ENGcm07207 which is present on i.MX25 and i.MX35 */
-       return (cpu_is_mx25() || cpu_is_mx35()) ? 1 : 65535;
+       return (is_imx25_esdhc(imx_data) || is_imx35_esdhc(imx_data)) ?
+               1 : 65535;
 }

 static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)

@@ -274,6 +323,8 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)

       imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
       if (!imx_data)
               return -ENOMEM;
+
+       imx_data->devtype = pdev->id_entry->driver_data;
       pltfm_host->priv = imx_data;

       clk = clk_get(mmc_dev(host->mmc), NULL);

@@ -285,10 +336,10 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)

       clk_enable(clk);
       pltfm_host->clk = clk;

-       if (!cpu_is_mx25())
+       if (!is_imx25_esdhc(imx_data))
               host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;

-       if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
+       if (is_imx53_esdhc(imx_data))
               imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;

       boarddata = host->mmc->parent->platform_data;

@@ -401,6 +452,7 @@ static struct platform_driver sdhci_esdhc_imx_driver = {

               .name   = "sdhci-esdhc-imx",
               .owner  = THIS_MODULE,
       },
+       .id_table       = imx_esdhc_devtype,
       .probe          = sdhci_esdhc_imx_probe,
       .remove         = __devexit_p(sdhci_esdhc_imx_remove),
 #ifdef CONFIG_PM
--
1.7.4.1


_______________________________________________
devicetree-discuss mailing list
devicetree-discuss@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/devicetree-discuss



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

[PATCH v2 2/3] mmc: sdhci-pltfm: dt device does not pass parent to sdhci_alloc_host

From: Shawn Guo <hidden>
Date: 2011-07-05 15:26:07

Neither platform based nor dt based device needs to pass the parent
to sdhci_alloc_host.  There is no difference between platform and dt
on this point.

The patch makes the change to pass device itself than its parent to
sdhci_alloc_host for dt case too.  Otherwise the probe function of
sdhci based drivers which is shared between platform and dt will
fail on dt case.

Signed-off-by: Shawn Guo <redacted>
Acked-by: Grant Likely <redacted>
Cc: Chris Ball <redacted>
---
 drivers/mmc/host/sdhci-pltfm.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index 71c0ce1..6414efe 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c

@@ -85,6 +85,7 @@ struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
 {
 	struct sdhci_host *host;
 	struct sdhci_pltfm_host *pltfm_host;
+	struct device_node *np = pdev->dev.of_node;
 	struct resource *iomem;
 	int ret;

@@ -98,7 +99,7 @@ struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
 		dev_err(&pdev->dev, "Invalid iomem size!\n");
 
 	/* Some PCI-based MFD need the parent here */
-	if (pdev->dev.parent != &platform_bus)
+	if (pdev->dev.parent != &platform_bus && !np)
 		host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host));
 	else
 		host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host));

-- 
1.7.4.1

Re: [PATCH v2 2/3] mmc: sdhci-pltfm: dt device does not pass parent to sdhci_alloc_host

From: Sergei Shtylyov <hidden>
Date: 2011-07-07 11:33:15

Hello.

On 05-07-2011 19:26, Shawn Guo wrote:

Neither platform based nor dt based device needs to pass the parent
to sdhci_alloc_host.  There is no difference between platform and dt
on this point.

The patch makes the change to pass device itself than its parent to

    Maybe "rather than"?

sdhci_alloc_host for dt case too.  Otherwise the probe function of
sdhci based drivers which is shared between platform and dt will
fail on dt case.

Signed-off-by: Shawn Guo<redacted>
Acked-by: Grant Likely<redacted>
Cc: Chris Ball<redacted>

WBR, Sergei

[PATCH v2 3/3] mmc: sdhci-esdhc-imx: add device tree probe support

From: Shawn Guo <hidden>
Date: 2011-07-05 15:26:08

The patch adds device tree probe support for sdhci-esdhc-imx driver.

Signed-off-by: Shawn Guo <redacted>
Cc: Wolfram Sang <redacted>
Cc: Chris Ball <redacted>
Cc: Grant Likely <redacted>
---
 .../devicetree/bindings/mmc/fsl-imx-esdhc.txt      |   40 ++++++++
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  102 +++++++++++++++++++-
 2 files changed, 137 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
new file mode 100644
index 0000000..351d239
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

@@ -0,0 +1,40 @@
+* Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
+
+The Enhanced Secure Digital Host Controller on Freescale i.MX family
+provides an interface for MMC, SD, and SDIO types of memory cards.
+
+Required properties:
+- compatible : Should be "fsl,<chip>-esdhc"
+- reg : Should contain eSDHC registers location and length
+- interrupts : Should contain eSDHC interrupt
+- cd-type : String, card detection (CD) method.  Supported values are:
+    "none" : No CD
+    "controller" : Uses eSDHC controller internal CD signal
+    "gpio" : Uses GPIO pin for CD
+    "permanent" : No CD because card is permanently wired to host
+- wp-type : String, write protection (WP) method.  Supported values are:
+    "none" : No WP
+    "controller" : Uses eSDHC controller internal WP signal 
+    "gpio" : Uses GPIO pin for WP
+- gpios : Should specify GPIOs in this order: CD GPIO, WP GPIO, if
+  properties cd-type and wp-type are "gpio".
+
+Examples:
+
+esdhc@70004000 {
+	compatible = "fsl,imx51-esdhc";
+	reg = <0x70004000 0x4000>;
+	interrupts = <1>;
+	fsl,cd-type = "controller";
+	fsl,wp-type = "controller";
+};
+
+esdhc@70008000 {
+	compatible = "fsl,imx51-esdhc";
+	reg = <0x70008000 0x4000>;
+	interrupts = <2>;
+	fsl,cd-type = "gpio";
+	fsl,wp-type = "gpio";
+	cd-gpios = <&gpio0 6 0>; /* GPIO1_6 */
+	wp-gpios = <&gpio0 5 0>; /* GPIO1_5 */
+};

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 1edda29..593d6b9 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c

@@ -20,6 +20,9 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/sdio.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
 #include <mach/esdhc.h>
 #include "sdhci-pltfm.h"
 #include "sdhci-esdhc.h"

@@ -72,6 +75,14 @@ static struct platform_device_id imx_esdhc_devtype[] = {
 	}
 };
 
+static const struct of_device_id imx_esdhc_dt_ids[] = {
+	{ .compatible = "fsl,imx25-esdhc", .data = &imx_esdhc_devtype[IMX25_ESDHC], },
+	{ .compatible = "fsl,imx35-esdhc", .data = &imx_esdhc_devtype[IMX35_ESDHC], },
+	{ .compatible = "fsl,imx51-esdhc", .data = &imx_esdhc_devtype[IMX51_ESDHC], },
+	{ .compatible = "fsl,imx53-esdhc", .data = &imx_esdhc_devtype[IMX53_ESDHC], },
+	{ /* sentinel */ }
+};
+
 static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
 {
 	return data->devtype == IMX25_ESDHC;

@@ -305,24 +316,96 @@ static irqreturn_t cd_irq(int irq, void *data)
 	return IRQ_HANDLED;
 };
 
+#ifdef CONFIG_OF
+static const char *cd_types[] = {
+	[ESDHC_CD_NONE]		= "none",
+	[ESDHC_CD_CONTROLLER]	= "controller",
+	[ESDHC_CD_GPIO]		= "gpio",
+	[ESDHC_CD_PERMANENT]	= "permanent",
+};
+
+static const char *wp_types[] = {
+	[ESDHC_WP_NONE]		= "none",
+	[ESDHC_WP_CONTROLLER]	= "controller",
+	[ESDHC_WP_GPIO]		= "gpio",
+};
+
+static int __devinit sdhci_esdhc_imx_probe_dt(struct platform_device *pdev)
+{
+	const struct of_device_id *of_id =
+			of_match_device(imx_esdhc_dt_ids, &pdev->dev);
+	struct device_node *np = pdev->dev.of_node;
+	struct esdhc_platform_data *boarddata;
+	int err, i;
+	const char *cd, *wp;
+
+	if (!np)
+		return -ENODEV;
+
+	boarddata = kzalloc(sizeof(*boarddata), GFP_KERNEL);
+	if (!boarddata)
+		return -ENOMEM;
+	pdev->dev.platform_data = boarddata;
+
+	err = of_property_read_string(np, "fsl,cd-type", &cd);
+	if (err)
+		return err;
+	for (i = 0; i < ARRAY_SIZE(cd_types); i++)
+		if (!strcasecmp(cd, cd_types[i])) {
+			boarddata->cd_type = i;
+			break;
+		}
+
+	err = of_property_read_string(np, "fsl,wp-type", &wp);
+	if (err)
+		return err;
+	for (i = 0; i < ARRAY_SIZE(wp_types); i++)
+		if (!strcasecmp(wp, wp_types[i])) {
+			boarddata->wp_type = i;
+			break;
+		}
+
+	boarddata->cd_gpio = of_get_gpio(np, 0);
+	boarddata->wp_gpio = of_get_gpio(np, 1);
+
+	pdev->id_entry = of_id->data;
+
+	return 0;
+}
+#else
+static inline int sdhci_esdhc_imx_probe_dt(struct platform_device *pdev)
+{
+	return 0;
+}
+#endif
+
 static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 {
+	struct device_node *np = pdev->dev.of_node;
 	struct sdhci_pltfm_host *pltfm_host;
 	struct sdhci_host *host;
-	struct esdhc_platform_data *boarddata;
+	struct esdhc_platform_data *boarddata = NULL;
 	struct clk *clk;
 	int err;
 	struct pltfm_imx_data *imx_data;
 
+	err = sdhci_esdhc_imx_probe_dt(pdev);
+	if (err)
+		return err;
+
 	host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata);
-	if (IS_ERR(host))
-		return PTR_ERR(host);
+	if (IS_ERR(host)) {
+		err = PTR_ERR(host);
+		goto err_sdhci_pltfm;
+	}
 
 	pltfm_host = sdhci_priv(host);
 
 	imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
-	if (!imx_data)
-		return -ENOMEM;
+	if (!imx_data) {
+		err = -ENOMEM;
+		goto err_imx_data;
+	}
 
 	imx_data->devtype = pdev->id_entry->driver_data;
 	pltfm_host->priv = imx_data;

@@ -416,12 +499,17 @@ no_board_data:
 	clk_put(pltfm_host->clk);
 err_clk_get:
 	kfree(imx_data);
+err_imx_data:
 	sdhci_pltfm_free(pdev);
+err_sdhci_pltfm:
+	if (np)
+		kfree(boarddata);
 	return err;
 }
 
 static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
 {
+	struct device_node *np = pdev->dev.of_node;
 	struct sdhci_host *host = platform_get_drvdata(pdev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;

@@ -444,6 +532,9 @@ static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
 
 	sdhci_pltfm_free(pdev);
 
+	if (np)
+		kfree(boarddata);
+
 	return 0;
 }

@@ -451,6 +542,7 @@ static struct platform_driver sdhci_esdhc_imx_driver = {
 	.driver		= {
 		.name	= "sdhci-esdhc-imx",
 		.owner	= THIS_MODULE,
+		.of_match_table = imx_esdhc_dt_ids,
 	},
 	.id_table	= imx_esdhc_devtype,
 	.probe		= sdhci_esdhc_imx_probe,

-- 
1.7.4.1

Re: [PATCH v2 3/3] mmc: sdhci-esdhc-imx: add device tree probe support

From: Grant Likely <hidden>
Date: 2011-07-05 17:54:34

On Tue, Jul 5, 2011 at 9:26 AM, Shawn Guo [off-list ref] wrote:

quoted hunk

The patch adds device tree probe support for sdhci-esdhc-imx driver.

Signed-off-by: Shawn Guo <redacted>
Cc: Wolfram Sang <redacted>
Cc: Chris Ball <redacted>
Cc: Grant Likely <redacted>
---
 .../devicetree/bindings/mmc/fsl-imx-esdhc.txt      |   40 ++++++++
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  102 +++++++++++++++++++-
 2 files changed, 137 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
new file mode 100644
index 0000000..351d239
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

@@ -0,0 +1,40 @@
+* Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
+
+The Enhanced Secure Digital Host Controller on Freescale i.MX family
+provides an interface for MMC, SD, and SDIO types of memory cards.
+
+Required properties:
+- compatible : Should be "fsl,<chip>-esdhc"
+- reg : Should contain eSDHC registers location and length
+- interrupts : Should contain eSDHC interrupt
+- cd-type : String, card detection (CD) method.  Supported values are:
+    "none" : No CD
+    "controller" : Uses eSDHC controller internal CD signal
+    "gpio" : Uses GPIO pin for CD
+    "permanent" : No CD because card is permanently wired to host
+- wp-type : String, write protection (WP) method.  Supported values are:
+    "none" : No WP
+    "controller" : Uses eSDHC controller internal WP signal
+    "gpio" : Uses GPIO pin for WP
+- gpios : Should specify GPIOs in this order: CD GPIO, WP GPIO, if
+  properties cd-type and wp-type are "gpio".

Again, be explicit in your gpios property names.  Create a different
property for each gpio: cd-gpios and wp-gpios.

As for wp-type and cd-type, I think you can drop them.  Default to
internal controller CD and WP pins.  Use gpio if cd-gpios or wp-gpios
is present, and define specific properties for the no-wp, no-cd and
fixed-card cases.  (can you tell that I'm not a fan of the "*-type"
binding for this driver?)  :-)

quoted hunk

+
+Examples:
+
+esdhc@70004000 {
+       compatible = "fsl,imx51-esdhc";
+       reg = <0x70004000 0x4000>;
+       interrupts = <1>;
+       fsl,cd-type = "controller";
+       fsl,wp-type = "controller";
+};
+
+esdhc@70008000 {
+       compatible = "fsl,imx51-esdhc";
+       reg = <0x70008000 0x4000>;
+       interrupts = <2>;
+       fsl,cd-type = "gpio";
+       fsl,wp-type = "gpio";
+       cd-gpios = <&gpio0 6 0>; /* GPIO1_6 */
+       wp-gpios = <&gpio0 5 0>; /* GPIO1_5 */
+};

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 1edda29..593d6b9 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c

@@ -20,6 +20,9 @@

 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/sdio.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
 #include <mach/esdhc.h>
 #include "sdhci-pltfm.h"
 #include "sdhci-esdhc.h"

@@ -72,6 +75,14 @@ static struct platform_device_id imx_esdhc_devtype[] = {

       }
 };

+static const struct of_device_id imx_esdhc_dt_ids[] = {
+       { .compatible = "fsl,imx25-esdhc", .data = &imx_esdhc_devtype[IMX25_ESDHC], },
+       { .compatible = "fsl,imx35-esdhc", .data = &imx_esdhc_devtype[IMX35_ESDHC], },
+       { .compatible = "fsl,imx51-esdhc", .data = &imx_esdhc_devtype[IMX51_ESDHC], },
+       { .compatible = "fsl,imx53-esdhc", .data = &imx_esdhc_devtype[IMX53_ESDHC], },
+       { /* sentinel */ }
+};
+
 static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
 {
       return data->devtype == IMX25_ESDHC;

@@ -305,24 +316,96 @@ static irqreturn_t cd_irq(int irq, void *data)

       return IRQ_HANDLED;
 };

+#ifdef CONFIG_OF
+static const char *cd_types[] = {
+       [ESDHC_CD_NONE]         = "none",
+       [ESDHC_CD_CONTROLLER]   = "controller",
+       [ESDHC_CD_GPIO]         = "gpio",
+       [ESDHC_CD_PERMANENT]    = "permanent",
+};
+
+static const char *wp_types[] = {
+       [ESDHC_WP_NONE]         = "none",
+       [ESDHC_WP_CONTROLLER]   = "controller",
+       [ESDHC_WP_GPIO]         = "gpio",
+};
+
+static int __devinit sdhci_esdhc_imx_probe_dt(struct platform_device *pdev)
+{
+       const struct of_device_id *of_id =
+                       of_match_device(imx_esdhc_dt_ids, &pdev->dev);
+       struct device_node *np = pdev->dev.of_node;
+       struct esdhc_platform_data *boarddata;
+       int err, i;
+       const char *cd, *wp;
+
+       if (!np)
+               return -ENODEV;
+
+       boarddata = kzalloc(sizeof(*boarddata), GFP_KERNEL);
+       if (!boarddata)
+               return -ENOMEM;
+       pdev->dev.platform_data = boarddata;

This is illegal.  As far as device drivers are concerned,
pdev->dev.platform_data is immutable and must not be changed.
Otherwise they break the driver model.  If you need to keep around a
platform_data structure, then it needs to be stored in the driver
private data.  Your best option is to refactor the driver to not
reference pdev->dev.platform_data after probe() exits.

quoted hunk

+
+       err = of_property_read_string(np, "fsl,cd-type", &cd);
+       if (err)
+               return err;
+       for (i = 0; i < ARRAY_SIZE(cd_types); i++)
+               if (!strcasecmp(cd, cd_types[i])) {
+                       boarddata->cd_type = i;
+                       break;
+               }
+
+       err = of_property_read_string(np, "fsl,wp-type", &wp);
+       if (err)
+               return err;
+       for (i = 0; i < ARRAY_SIZE(wp_types); i++)
+               if (!strcasecmp(wp, wp_types[i])) {
+                       boarddata->wp_type = i;
+                       break;
+               }
+
+       boarddata->cd_gpio = of_get_gpio(np, 0);
+       boarddata->wp_gpio = of_get_gpio(np, 1);
+
+       pdev->id_entry = of_id->data;
+
+       return 0;
+}
+#else
+static inline int sdhci_esdhc_imx_probe_dt(struct platform_device *pdev)
+{
+       return 0;
+}
+#endif
+
 static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 {
+       struct device_node *np = pdev->dev.of_node;
       struct sdhci_pltfm_host *pltfm_host;
       struct sdhci_host *host;
-       struct esdhc_platform_data *boarddata;
+       struct esdhc_platform_data *boarddata = NULL;
       struct clk *clk;
       int err;
       struct pltfm_imx_data *imx_data;

+       err = sdhci_esdhc_imx_probe_dt(pdev);
+       if (err)
+               return err;
+
       host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata);
-       if (IS_ERR(host))
-               return PTR_ERR(host);
+       if (IS_ERR(host)) {
+               err = PTR_ERR(host);
+               goto err_sdhci_pltfm;
+       }

       pltfm_host = sdhci_priv(host);

       imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
-       if (!imx_data)
-               return -ENOMEM;
+       if (!imx_data) {
+               err = -ENOMEM;
+               goto err_imx_data;
+       }

       imx_data->devtype = pdev->id_entry->driver_data;
       pltfm_host->priv = imx_data;

@@ -416,12 +499,17 @@ no_board_data:

       clk_put(pltfm_host->clk);
 err_clk_get:
       kfree(imx_data);
+err_imx_data:
       sdhci_pltfm_free(pdev);
+err_sdhci_pltfm:
+       if (np)
+               kfree(boarddata);
       return err;
 }

 static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
 {
+       struct device_node *np = pdev->dev.of_node;
       struct sdhci_host *host = platform_get_drvdata(pdev);
       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
       struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;

@@ -444,6 +532,9 @@ static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)

       sdhci_pltfm_free(pdev);

+       if (np)
+               kfree(boarddata);
+
       return 0;
 }

@@ -451,6 +542,7 @@ static struct platform_driver sdhci_esdhc_imx_driver = {

       .driver         = {
               .name   = "sdhci-esdhc-imx",
               .owner  = THIS_MODULE,
+               .of_match_table = imx_esdhc_dt_ids,
       },
       .id_table       = imx_esdhc_devtype,
       .probe          = sdhci_esdhc_imx_probe,
--
1.7.4.1



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

Re: [PATCH v2 3/3] mmc: sdhci-esdhc-imx: add device tree probe support

From: Shawn Guo <hidden>
Date: 2011-07-06 03:31:47

On Tue, Jul 05, 2011 at 11:54:34AM -0600, Grant Likely wrote:

On Tue, Jul 5, 2011 at 9:26 AM, Shawn Guo [off-list ref] wrote:

quoted

The patch adds device tree probe support for sdhci-esdhc-imx driver.

Signed-off-by: Shawn Guo <redacted>
Cc: Wolfram Sang <redacted>
Cc: Chris Ball <redacted>
Cc: Grant Likely <redacted>
---
 .../devicetree/bindings/mmc/fsl-imx-esdhc.txt      |   40 ++++++++
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  102 +++++++++++++++++++-
 2 files changed, 137 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
new file mode 100644
index 0000000..351d239
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

@@ -0,0 +1,40 @@
+* Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
+
+The Enhanced Secure Digital Host Controller on Freescale i.MX family
+provides an interface for MMC, SD, and SDIO types of memory cards.
+
+Required properties:
+- compatible : Should be "fsl,<chip>-esdhc"
+- reg : Should contain eSDHC registers location and length
+- interrupts : Should contain eSDHC interrupt
+- cd-type : String, card detection (CD) method.  Supported values are:
+    "none" : No CD
+    "controller" : Uses eSDHC controller internal CD signal
+    "gpio" : Uses GPIO pin for CD
+    "permanent" : No CD because card is permanently wired to host
+- wp-type : String, write protection (WP) method.  Supported values are:
+    "none" : No WP
+    "controller" : Uses eSDHC controller internal WP signal
+    "gpio" : Uses GPIO pin for WP
+- gpios : Should specify GPIOs in this order: CD GPIO, WP GPIO, if
+  properties cd-type and wp-type are "gpio".

Again, be explicit in your gpios property names.  Create a different
property for each gpio: cd-gpios and wp-gpios.

Sorry. I fixed the example below.  But this one got missed.

As for wp-type and cd-type, I think you can drop them.  Default to
internal controller CD and WP pins.  Use gpio if cd-gpios or wp-gpios
is present, and define specific properties for the no-wp, no-cd and
fixed-card cases.  (can you tell that I'm not a fan of the "*-type"
binding for this driver?)  :-)

Ok, I'm getting to know you.

quoted

+
+Examples:
+
+esdhc@70004000 {
+       compatible = "fsl,imx51-esdhc";
+       reg = <0x70004000 0x4000>;
+       interrupts = <1>;
+       fsl,cd-type = "controller";
+       fsl,wp-type = "controller";
+};
+
+esdhc@70008000 {
+       compatible = "fsl,imx51-esdhc";
+       reg = <0x70008000 0x4000>;
+       interrupts = <2>;
+       fsl,cd-type = "gpio";
+       fsl,wp-type = "gpio";
+       cd-gpios = <&gpio0 6 0>; /* GPIO1_6 */
+       wp-gpios = <&gpio0 5 0>; /* GPIO1_5 */
+};

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 1edda29..593d6b9 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c

@@ -20,6 +20,9 @@

 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/sdio.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
 #include <mach/esdhc.h>
 #include "sdhci-pltfm.h"
 #include "sdhci-esdhc.h"

@@ -72,6 +75,14 @@ static struct platform_device_id imx_esdhc_devtype[] = {

       }
 };

+static const struct of_device_id imx_esdhc_dt_ids[] = {
+       { .compatible = "fsl,imx25-esdhc", .data = &imx_esdhc_devtype[IMX25_ESDHC], },
+       { .compatible = "fsl,imx35-esdhc", .data = &imx_esdhc_devtype[IMX35_ESDHC], },
+       { .compatible = "fsl,imx51-esdhc", .data = &imx_esdhc_devtype[IMX51_ESDHC], },
+       { .compatible = "fsl,imx53-esdhc", .data = &imx_esdhc_devtype[IMX53_ESDHC], },
+       { /* sentinel */ }
+};
+
 static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
 {
       return data->devtype == IMX25_ESDHC;

@@ -305,24 +316,96 @@ static irqreturn_t cd_irq(int irq, void *data)

       return IRQ_HANDLED;
 };

+#ifdef CONFIG_OF
+static const char *cd_types[] = {
+       [ESDHC_CD_NONE]         = "none",
+       [ESDHC_CD_CONTROLLER]   = "controller",
+       [ESDHC_CD_GPIO]         = "gpio",
+       [ESDHC_CD_PERMANENT]    = "permanent",
+};
+
+static const char *wp_types[] = {
+       [ESDHC_WP_NONE]         = "none",
+       [ESDHC_WP_CONTROLLER]   = "controller",
+       [ESDHC_WP_GPIO]         = "gpio",
+};
+
+static int __devinit sdhci_esdhc_imx_probe_dt(struct platform_device *pdev)
+{
+       const struct of_device_id *of_id =
+                       of_match_device(imx_esdhc_dt_ids, &pdev->dev);
+       struct device_node *np = pdev->dev.of_node;
+       struct esdhc_platform_data *boarddata;
+       int err, i;
+       const char *cd, *wp;
+
+       if (!np)
+               return -ENODEV;
+
+       boarddata = kzalloc(sizeof(*boarddata), GFP_KERNEL);
+       if (!boarddata)
+               return -ENOMEM;
+       pdev->dev.platform_data = boarddata;

This is illegal.  As far as device drivers are concerned,
pdev->dev.platform_data is immutable and must not be changed.
Otherwise they break the driver model.  If you need to keep around a
platform_data structure, then it needs to be stored in the driver
private data.  Your best option is to refactor the driver to not
reference pdev->dev.platform_data after probe() exits.

Ok.  I saw a patch from Troy doing this.  Will incorporate it into
the series.

Regards,
Shawn

quoted

+
+       err = of_property_read_string(np, "fsl,cd-type", &cd);
+       if (err)
+               return err;
+       for (i = 0; i < ARRAY_SIZE(cd_types); i++)
+               if (!strcasecmp(cd, cd_types[i])) {
+                       boarddata->cd_type = i;
+                       break;
+               }
+
+       err = of_property_read_string(np, "fsl,wp-type", &wp);
+       if (err)
+               return err;
+       for (i = 0; i < ARRAY_SIZE(wp_types); i++)
+               if (!strcasecmp(wp, wp_types[i])) {
+                       boarddata->wp_type = i;
+                       break;
+               }
+
+       boarddata->cd_gpio = of_get_gpio(np, 0);
+       boarddata->wp_gpio = of_get_gpio(np, 1);
+
+       pdev->id_entry = of_id->data;
+
+       return 0;
+}
+#else
+static inline int sdhci_esdhc_imx_probe_dt(struct platform_device *pdev)
+{
+       return 0;
+}
+#endif
+
 static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 {
+       struct device_node *np = pdev->dev.of_node;
       struct sdhci_pltfm_host *pltfm_host;
       struct sdhci_host *host;
-       struct esdhc_platform_data *boarddata;
+       struct esdhc_platform_data *boarddata = NULL;
       struct clk *clk;
       int err;
       struct pltfm_imx_data *imx_data;

+       err = sdhci_esdhc_imx_probe_dt(pdev);
+       if (err)
+               return err;
+
       host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata);
-       if (IS_ERR(host))
-               return PTR_ERR(host);
+       if (IS_ERR(host)) {
+               err = PTR_ERR(host);
+               goto err_sdhci_pltfm;
+       }

       pltfm_host = sdhci_priv(host);

       imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
-       if (!imx_data)
-               return -ENOMEM;
+       if (!imx_data) {
+               err = -ENOMEM;
+               goto err_imx_data;
+       }

       imx_data->devtype = pdev->id_entry->driver_data;
       pltfm_host->priv = imx_data;

@@ -416,12 +499,17 @@ no_board_data:

       clk_put(pltfm_host->clk);
 err_clk_get:
       kfree(imx_data);
+err_imx_data:
       sdhci_pltfm_free(pdev);
+err_sdhci_pltfm:
+       if (np)
+               kfree(boarddata);
       return err;
 }

 static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
 {
+       struct device_node *np = pdev->dev.of_node;
       struct sdhci_host *host = platform_get_drvdata(pdev);
       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
       struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;

@@ -444,6 +532,9 @@ static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)

       sdhci_pltfm_free(pdev);

+       if (np)
+               kfree(boarddata);
+
       return 0;
 }

@@ -451,6 +542,7 @@ static struct platform_driver sdhci_esdhc_imx_driver = {

       .driver         = {
               .name   = "sdhci-esdhc-imx",
               .owner  = THIS_MODULE,
+               .of_match_table = imx_esdhc_dt_ids,
       },
       .id_table       = imx_esdhc_devtype,
       .probe          = sdhci_esdhc_imx_probe,
--
1.7.4.1

Re: [PATCH v2 3/3] mmc: sdhci-esdhc-imx: add device tree probe support

From: Shawn Guo <hidden>
Date: 2011-07-06 15:43:15

On Tue, Jul 05, 2011 at 11:54:34AM -0600, Grant Likely wrote:

On Tue, Jul 5, 2011 at 9:26 AM, Shawn Guo [off-list ref] wrote:

quoted

The patch adds device tree probe support for sdhci-esdhc-imx driver.

Signed-off-by: Shawn Guo <redacted>
Cc: Wolfram Sang <redacted>
Cc: Chris Ball <redacted>
Cc: Grant Likely <redacted>
---
 .../devicetree/bindings/mmc/fsl-imx-esdhc.txt      |   40 ++++++++
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  102 +++++++++++++++++++-
 2 files changed, 137 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
new file mode 100644
index 0000000..351d239
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

@@ -0,0 +1,40 @@
+* Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
+
+The Enhanced Secure Digital Host Controller on Freescale i.MX family
+provides an interface for MMC, SD, and SDIO types of memory cards.
+
+Required properties:
+- compatible : Should be "fsl,<chip>-esdhc"
+- reg : Should contain eSDHC registers location and length
+- interrupts : Should contain eSDHC interrupt
+- cd-type : String, card detection (CD) method.  Supported values are:
+    "none" : No CD
+    "controller" : Uses eSDHC controller internal CD signal
+    "gpio" : Uses GPIO pin for CD
+    "permanent" : No CD because card is permanently wired to host
+- wp-type : String, write protection (WP) method.  Supported values are:
+    "none" : No WP
+    "controller" : Uses eSDHC controller internal WP signal
+    "gpio" : Uses GPIO pin for WP
+- gpios : Should specify GPIOs in this order: CD GPIO, WP GPIO, if
+  properties cd-type and wp-type are "gpio".

Again, be explicit in your gpios property names.  Create a different
property for each gpio: cd-gpios and wp-gpios.

As for wp-type and cd-type, I think you can drop them.  Default to
internal controller CD and WP pins.  Use gpio if cd-gpios or wp-gpios
is present, and define specific properties for the no-wp, no-cd and
fixed-card cases.  (can you tell that I'm not a fan of the "*-type"
binding for this driver?)  :-)

I would let default be no CD/WP, and define properties for
controller internal CD/WP and wired case, if you do not see a
problem with it.

-- 
Regards,
Shawn

Re: [PATCH v2 3/3] mmc: sdhci-esdhc-imx: add device tree probe support

From: Grant Likely <hidden>
Date: 2011-07-06 15:50:30

On Wed, Jul 06, 2011 at 11:43:15PM +0800, Shawn Guo wrote:

On Tue, Jul 05, 2011 at 11:54:34AM -0600, Grant Likely wrote:

quoted

On Tue, Jul 5, 2011 at 9:26 AM, Shawn Guo [off-list ref] wrote:

quoted

The patch adds device tree probe support for sdhci-esdhc-imx driver.

Signed-off-by: Shawn Guo <redacted>
Cc: Wolfram Sang <redacted>
Cc: Chris Ball <redacted>
Cc: Grant Likely <redacted>
---
 .../devicetree/bindings/mmc/fsl-imx-esdhc.txt      |   40 ++++++++
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  102 +++++++++++++++++++-
 2 files changed, 137 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
new file mode 100644
index 0000000..351d239
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

@@ -0,0 +1,40 @@
+* Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
+
+The Enhanced Secure Digital Host Controller on Freescale i.MX family
+provides an interface for MMC, SD, and SDIO types of memory cards.
+
+Required properties:
+- compatible : Should be "fsl,<chip>-esdhc"
+- reg : Should contain eSDHC registers location and length
+- interrupts : Should contain eSDHC interrupt
+- cd-type : String, card detection (CD) method.  Supported values are:
+    "none" : No CD
+    "controller" : Uses eSDHC controller internal CD signal
+    "gpio" : Uses GPIO pin for CD
+    "permanent" : No CD because card is permanently wired to host
+- wp-type : String, write protection (WP) method.  Supported values are:
+    "none" : No WP
+    "controller" : Uses eSDHC controller internal WP signal
+    "gpio" : Uses GPIO pin for WP
+- gpios : Should specify GPIOs in this order: CD GPIO, WP GPIO, if
+  properties cd-type and wp-type are "gpio".

Again, be explicit in your gpios property names.  Create a different
property for each gpio: cd-gpios and wp-gpios.

As for wp-type and cd-type, I think you can drop them.  Default to
internal controller CD and WP pins.  Use gpio if cd-gpios or wp-gpios
is present, and define specific properties for the no-wp, no-cd and
fixed-card cases.  (can you tell that I'm not a fan of the "*-type"
binding for this driver?)  :-)

I would let default be no CD/WP, and define properties for
controller internal CD/WP and wired case, if you do not see a
problem with it.

Okay.

g.

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