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Subject[PATCH 10/14] pinctrl/abx500: add Device Tree support
Date
From: Lee Jones <lee.jones@linaro.org>

This patch will allow the ABX500 Pinctrl driver to be probed when
Device Tree is enabled with an appropriate node contained.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/pinctrl/pinctrl-abx500.c | 36 +++++++++++++++++++++++++++++++-----
1 file changed, 31 insertions(+), 5 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-abx500.c b/drivers/pinctrl/pinctrl-abx500.c
index a0d324b..20f94cf 100644
--- a/drivers/pinctrl/pinctrl-abx500.c
+++ b/drivers/pinctrl/pinctrl-abx500.c
@@ -14,6 +14,8 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/irq.h>
@@ -825,22 +827,44 @@ static int abx500_get_gpio_num(struct abx500_pinctrl_soc_data *soc)
return npins;
}

+static const struct of_device_id abx500_gpio_match[] = {
+ { .compatible = "stericsson,ab8500-gpio", .data = (void *)PINCTRL_AB8500, },
+ { .compatible = "stericsson,ab8505-gpio", .data = (void *)PINCTRL_AB8505, },
+ { .compatible = "stericsson,ab8540-gpio", .data = (void *)PINCTRL_AB8540, },
+ { .compatible = "stericsson,ab9540-gpio", .data = (void *)PINCTRL_AB9540, },
+};
+
static int abx500_gpio_probe(struct platform_device *pdev)
{
struct ab8500_platform_data *abx500_pdata =
dev_get_platdata(pdev->dev.parent);
- struct abx500_gpio_platform_data *pdata;
+ struct abx500_gpio_platform_data *pdata = NULL;
+ struct device_node *np = pdev->dev.of_node;
struct abx500_pinctrl *pct;
const struct platform_device_id *platid = platform_get_device_id(pdev);
+ unsigned int id = -1;
int ret, err;
int i;

- pdata = abx500_pdata->gpio;
+ if (abx500_pdata)
+ pdata = abx500_pdata->gpio;
if (!pdata) {
- dev_err(&pdev->dev, "gpio platform data missing\n");
- return -ENODEV;
+ if (np) {
+ const struct of_device_id *match;
+
+ match = of_match_device(abx500_gpio_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+ id = (unsigned long)match->data;
+ } else {
+ dev_err(&pdev->dev, "gpio dt and platform data missing\n");
+ return -ENODEV;
+ }
}

+ if (platid)
+ id = platid->driver_data;
+
pct = devm_kzalloc(&pdev->dev, sizeof(struct abx500_pinctrl),
GFP_KERNEL);
if (pct == NULL) {
@@ -854,12 +878,13 @@ static int abx500_gpio_probe(struct platform_device *pdev)
pct->chip = abx500gpio_chip;
pct->chip.dev = &pdev->dev;
pct->chip.base = pdata->gpio_base;
+ pct->chip.base = (np) ? -1 : pdata->gpio_base;

/* initialize the lock */
mutex_init(&pct->lock);

/* Poke in other ASIC variants here */
- switch (platid->driver_data) {
+ switch (id) {
case PINCTRL_AB8500:
abx500_pinctrl_ab8500_init(&pct->soc);
break;
@@ -966,6 +991,7 @@ static struct platform_driver abx500_gpio_driver = {
.driver = {
.name = "abx500-gpio",
.owner = THIS_MODULE,
+ .of_match_table = abx500_gpio_match,
},
.probe = abx500_gpio_probe,
.remove = abx500_gpio_remove,
--
1.7.11.3


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