[PATCH V3 3/3] pwm: pxa: add device tree support

Chao Xie
2013-04-24T02:29:45Z

Add the deice tree support for pwm-pxa.

Signed-off-by: Chao Xie <chao.xie@marvell.com>
---
drivers/pwm/pwm-pxa.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 55 insertions(+), 2 deletions(-)

diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index aa4bea7..45d9047 100644
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -9,6 +9,8 @@
*
* 2008-02-13 initial version
* eric miao <eric.miao@marvell.com>
+ * 2013-04-24 add device tree support
+ * Chao Xie <chao.xie@marvell.com>
*/

#include <linux/module.h>
@@ -18,6 +20,8 @@
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/pwm.h>

#include <asm/div64.h>
@@ -124,9 +128,52 @@ static struct pwm_ops pxa_pwm_ops = {
.owner = THIS_MODULE,
};

-static int pwm_probe(struct platform_device *pdev)
+static struct of_device_id pxa_pwm_of_match[] = {
+ {
+ .compatible = "marvell,pxa25x-pwm",
+ }, {
+ .compatible = "marvell,pxa27x-pwm",
+ .data = (void *)HAS_SECONDARY_PWM
+ }, {
+ .compatible = "marvell,pxa168-pwm",
+ }, {
+ .compatible = "marvell,pxa910-pwm",
+ },
+ {}
+};
+
+MODULE_DEVICE_TABLE(of, pxa_pwm_of_match);
+
+#ifdef CONFIG_OF
+static int pxa_pwm_parse_data(struct platform_device *pdev,
+ struct pxa_pwm_chip *pwm)
+{
+ const struct of_device_id *of_id =
+ of_match_device(pxa_pwm_of_match, &pdev->dev);
+ unsigned int npwm;
+
+ if (!of_id)
+ return -ENODEV;
+
+ npwm = (unsigned int)(of_id->data);
+ pwm->chip.npwm = (npwm & HAS_SECONDARY_PWM) ? 2 : 1;
+
+ return 0;
+}
+#else
+static int pxa_pwm_parse_data(struct platform_device *pdev,
+ struct pxa_pwm_chip *pwm)
{
const struct platform_device_id *id = platform_get_device_id(pdev);
+
+ pwm->chip.npwm = (id->driver_data & HAS_SECONDARY_PWM) ? 2 : 1;
+
+ return 0;
+}
+#endif
+
+static int pwm_probe(struct platform_device *pdev)
+{
struct pxa_pwm_chip *pwm;
struct resource *r;
int ret = 0;
@@ -144,7 +191,6 @@ static int pwm_probe(struct platform_device *pdev)
pwm->chip.dev = &pdev->dev;
pwm->chip.ops = &pxa_pwm_ops;
pwm->chip.base = -1;
- pwm->chip.npwm = (id->driver_data & HAS_SECONDARY_PWM) ? 2 : 1;

r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL) {
@@ -156,6 +202,12 @@ static int pwm_probe(struct platform_device *pdev)
if (IS_ERR(pwm->mmio_base))
return PTR_ERR(pwm->mmio_base);

+ ret = pxa_pwm_parse_data(pdev, pwm);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to parse data from device id\n");
+ return ret;
+ }
+
ret = pwmchip_add(&pwm->chip);
if (ret < 0) {
dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
@@ -181,6 +233,7 @@ static struct platform_driver pwm_driver = {
.driver = {
.name = "pxa25x-pwm",
.owner = THIS_MODULE,
+ .of_match_table = pxa_pwm_of_match,
},
.probe = pwm_probe,
.remove = pwm_remove,
--
1.7.4.1