Thread (21 messages) 21 messages, 5 authors, 2015-04-15

Re: [PATCH 2/2] pinctrl: Introduce TI IOdelay configuration driver

From: Paul Bolle <hidden>
Date: 2015-03-04 22:58:52
Also in: linux-arm-kernel, linux-gpio, linux-omap, lkml

Nishanth Menon schreef op di 03-03-2015 om 18:00 [-0600]:
quoted hunk ↗ jump to hunk
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index ee9f44ad7f02..8e463d75fbb2 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -160,6 +160,17 @@ config PINCTRL_TEGRA_XUSB
 	select PINCONF
 	select PINMUX
 
+config PINCTRL_TI_IODELAY
+	bool "TI IODelay Module pinconf driver"
This adds a boolean Kconfig symbol.
quoted hunk ↗ jump to hunk
+	depends on OF
+	select PINCONF
+	select GENERIC_PINCONF
+	select REGMAP_MMIO
+	help
+	  Say Y here to support Texas Instruments' IODelay pinconf driver.
+	  IODelay module is used for the DRA7 SoC family. This driver is in
+	  addition to PINCTRL_SINGLE which controls the mux.
+
 config PINCTRL_TZ1090
 	bool "Toumaz Xenif TZ1090 pin control driver"
 	depends on SOC_TZ1090
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 0475206dd600..e441cd71aedf 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_PINCTRL_TEGRA30)	+= pinctrl-tegra30.o
 obj-$(CONFIG_PINCTRL_TEGRA114)	+= pinctrl-tegra114.o
 obj-$(CONFIG_PINCTRL_TEGRA124)	+= pinctrl-tegra124.o
 obj-$(CONFIG_PINCTRL_TEGRA_XUSB)	+= pinctrl-tegra-xusb.o
+obj-$(CONFIG_PINCTRL_TI_IODELAY)	+= pinctrl-ti-iodelay.o
So this objectfile will either be built-in or not be built at all.
quoted hunk ↗ jump to hunk
 obj-$(CONFIG_PINCTRL_TZ1090)	+= pinctrl-tz1090.o
 obj-$(CONFIG_PINCTRL_TZ1090_PDC)	+= pinctrl-tz1090-pdc.o
 obj-$(CONFIG_PINCTRL_U300)	+= pinctrl-u300.o
diff --git a/drivers/pinctrl/pinctrl-ti-iodelay.c b/drivers/pinctrl/pinctrl-ti-iodelay.c
new file mode 100644
index 000000000000..e4c6e25a781c
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-ti-iodelay.c
@@ -0,0 +1,963 @@
[...]
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/list.h>
+#include <linux/module.h>
This is, I think, a bit of a red flag.
+#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
[...]
+static const struct of_device_id ti_iodelay_of_match[] = {
+	{.compatible = "ti,dra7-iodelay", .data = &dra7_iodelay_data},
+	{ /* Hopefully no more.. */ },
+};
+MODULE_DEVICE_TABLE(of, ti_iodelay_of_match);
+
+static struct platform_driver ti_iodelay_driver = {
+	.probe = ti_iodelay_probe,
+	.remove = ti_iodelay_remove,
+	.driver = {
+		   .owner = THIS_MODULE,
So THIS_MODULE will, basically, be NULL.
+		   .name = DRIVER_NAME,
+		   .of_match_table = ti_iodelay_of_match,
+		   },
+};
+module_platform_driver(ti_iodelay_driver);
+
+MODULE_AUTHOR("Texas Instruments, Inc.");
+MODULE_DESCRIPTION("Pinconf driver for TI's IO Delay module");
+MODULE_LICENSE("GPL v2");
And these three macros will be preprocessed away.

(Perhaps there are non-modular alternatives to MODULE_DEVICE_TABLE and
module_platform_driver, but I'm not sure how those two macros actually
work.)


Paul Bolle
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