Add the deice tree support for pwm-pxa.
Signed-off-by: Chao Xie <chao....@marvell.com>
---
drivers/pwm/pwm-pxa.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 51 insertions(+), 1 deletions(-)
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index aa4bea7..c8d59a2 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.m...@marvell.com>
+ * 2013-04-24 add device tree support
+ * Chao Xie <chao....@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>
@@ -124,6 +128,38 @@ static struct pwm_ops pxa_pwm_ops = {
.owner = THIS_MODULE,
};
+static const 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);
+
+static int pxa_pwm_parse_data_dt(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;
+}
+
static int pwm_probe(struct platform_device *pdev)
{
const struct platform_device_id *id = platform_get_device_id(pdev);
@@ -144,7 +180,6 @@ 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 +191,20 @@ static int pwm_probe(struct platform_device *pdev)
if (IS_ERR(pwm->mmio_base))
return PTR_ERR(pwm->mmio_base);
+ if (!id) {
+ if (IS_ENABLED(CONFIG_OF))
+ ret = pxa_pwm_parse_data_dt(pdev, pwm);
+ else
+ ret = -ENODEV;
+ } else {
+ pwm->chip.npwm = (id->driver_data & HAS_SECONDARY_PWM) ? 2 : 1;
+ }
+
+ 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 +230,7 @@ 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
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