On Thu, Aug 21, 2014 at 02:51:53PM +0530, Mugunthan V N wrote:

On Thursday 21 August 2014 11:21 AM, Markus Pargmann wrote:

quoted

This patch adds a function to get the MACIDs from the am33xx SoC
control module registers which hold unique vendor MACIDs. This is only
used if of_get_mac_address() fails to get a valid mac address.

Signed-off-by: Markus Pargmann <redacted>
Reviewed-by: Wolfram Sang <redacted>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
---
 Documentation/devicetree/bindings/net/cpsw.txt |  4 +++
 drivers/net/ethernet/ti/Kconfig                |  2 ++
 drivers/net/ethernet/ti/cpsw.c                 | 46 ++++++++++++++++++++++++--
 3 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
index 107caf174a0e..33fe8462edf4 100644
--- a/Documentation/devicetree/bindings/net/cpsw.txt
+++ b/Documentation/devicetree/bindings/net/cpsw.txt

@@ -24,6 +24,8 @@ Optional properties:
 - ti,hwmods		: Must be "cpgmac0"
 - no_bd_ram		: Must be 0 or 1
 - dual_emac		: Specifies Switch to act as Dual EMAC
+- syscon		: Phandle to the system control device node, which is
+			  the control module device of the am33x
 
 Slave Properties:
 Required properties:

@@ -57,6 +59,7 @@ Examples:
 		active_slave = <0>;
 		cpts_clock_mult = <0x80000000>;
 		cpts_clock_shift = <29>;
+		syscon = <&cm>;
 		cpsw_emac0: slave@0 {
 			phy_id = <&davinci_mdio>, <0>;
 			phy-mode = "rgmii-txid";

@@ -85,6 +88,7 @@ Examples:
 		active_slave = <0>;
 		cpts_clock_mult = <0x80000000>;
 		cpts_clock_shift = <29>;
+		syscon = <&cm>;
 		cpsw_emac0: slave@0 {
 			phy_id = <&davinci_mdio>, <0>;
 			phy-mode = "rgmii-txid";

diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig
index 1769700a6070..5d8cb7956113 100644
--- a/drivers/net/ethernet/ti/Kconfig
+++ b/drivers/net/ethernet/ti/Kconfig

@@ -62,6 +62,8 @@ config TI_CPSW
 	select TI_DAVINCI_CPDMA
 	select TI_DAVINCI_MDIO
 	select TI_CPSW_PHY_SEL
+	select MFD_SYSCON
+	select REGMAP
 	---help---
 	  This driver supports TI's CPSW Ethernet Switch.
 

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 0bc2c2a2c236..aaf8a42f9633 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c

@@ -33,6 +33,8 @@
 #include <linux/of_net.h>
 #include <linux/of_device.h>
 #include <linux/if_vlan.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
 
 #include <linux/pinctrl/consumer.h>
 

@@ -1816,6 +1818,39 @@ static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
 	slave->port_vlan = data->dual_emac_res_vlan;
 }
 
+#define AM33XX_CTRL_MAC_LO_REG(id) (0x630 + 0x8 * id)
+#define AM33XX_CTRL_MAC_HI_REG(id) (0x630 + 0x8 * id + 0x4)
+
+static int cpsw_am33xx_cm_get_macid(struct device *dev, int slave,
+		u8 *mac_addr)
+{
+	u32 macid_lo;
+	u32 macid_hi;
+	struct regmap *syscon;
+
+	if (!of_machine_is_compatible("ti,am33xx"))
+		return 0;
+
+	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+	if (IS_ERR(syscon)) {
+		if (PTR_ERR(syscon) == -ENODEV)
+			return 0;
+		return PTR_ERR(syscon);
+	}
+
+	regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(slave), &macid_lo);
+	regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(slave), &macid_hi);
+
+	mac_addr[5] = (macid_lo >> 8) & 0xff;
+	mac_addr[4] = macid_lo & 0xff;
+	mac_addr[3] = (macid_hi >> 24) & 0xff;
+	mac_addr[2] = (macid_hi >> 16) & 0xff;
+	mac_addr[1] = (macid_hi >> 8) & 0xff;
+	mac_addr[0] = macid_hi & 0xff;
+
+	return 0;
+}
+
 static int cpsw_probe_dt(struct cpsw_platform_data *data,
 			 struct platform_device *pdev)
 {

@@ -1928,8 +1963,15 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data,
 			 PHY_ID_FMT, mdio->name, phyid);
 
 		mac_addr = of_get_mac_address(slave_node);
-		if (mac_addr)
-			memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
+		if (mac_addr) {
+			memcpy(slave_data->mac_addr, mac_addr,
+					ETH_ALEN);

Alignment should match open parenthesis

Thanks, fixed as the rest of the driver is also aligned to the opening
paranthesis.

Best regards,

Markus

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