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authorPhilipp Zabel <p.zabel@pengutronix.de>2012-06-25 16:16:25 +0200
committerThierry Reding <thierry.reding@avionic-design.de>2012-09-12 14:25:06 +0200
commit479e2e301c626cc64fb27b6b1938655eaba8b036 (patch)
treefe3e4627c75af747f10c3460f79820522adbf557 /drivers/pwm/pwm-imx.c
parent208d038f4792b5ca0dc76deebbc0ae13b4f1a744 (diff)
pwm: i.MX: add devicetree support
At the same time remove platform based support. No user for this driver has made it into mainline so far, so all we break is out of tree stuff. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Reviewed-by: Shawn Guo <shawn.guo@linaro.org> Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Diffstat (limited to 'drivers/pwm/pwm-imx.c')
-rw-r--r--drivers/pwm/pwm-imx.c44
1 files changed, 35 insertions, 9 deletions
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index a1e799ee07de..0f6c436c0632 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -16,9 +16,9 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/pwm.h>
+#include <linux/of_device.h>
#include <mach/hardware.h>
-
/* i.MX1 and i.MX21 share the same PWM function block: */
#define MX1_PWMC 0x00 /* PWM Control Register */
@@ -204,12 +204,41 @@ static struct pwm_ops imx_pwm_ops = {
.owner = THIS_MODULE,
};
+struct imx_pwm_data {
+ int (*config)(struct pwm_chip *chip,
+ struct pwm_device *pwm, int duty_ns, int period_ns);
+ void (*set_enable)(struct pwm_chip *chip, bool enable);
+};
+
+static struct imx_pwm_data imx_pwm_data_v1 = {
+ .config = imx_pwm_config_v1,
+ .set_enable = imx_pwm_set_enable_v1,
+};
+
+static struct imx_pwm_data imx_pwm_data_v2 = {
+ .config = imx_pwm_config_v2,
+ .set_enable = imx_pwm_set_enable_v2,
+};
+
+static const struct of_device_id imx_pwm_dt_ids[] = {
+ { .compatible = "fsl,imx1-pwm", .data = &imx_pwm_data_v1, },
+ { .compatible = "fsl,imx27-pwm", .data = &imx_pwm_data_v2, },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_pwm_dt_ids);
+
static int __devinit imx_pwm_probe(struct platform_device *pdev)
{
+ const struct of_device_id *of_id =
+ of_match_device(imx_pwm_dt_ids, &pdev->dev);
+ struct imx_pwm_data *data;
struct imx_chip *imx;
struct resource *r;
int ret = 0;
+ if (!of_id)
+ return -ENODEV;
+
imx = devm_kzalloc(&pdev->dev, sizeof(*imx), GFP_KERNEL);
if (imx == NULL) {
dev_err(&pdev->dev, "failed to allocate memory\n");
@@ -236,13 +265,9 @@ static int __devinit imx_pwm_probe(struct platform_device *pdev)
if (imx->mmio_base == NULL)
return -EADDRNOTAVAIL;
- if (cpu_is_mx1() || cpu_is_mx21()) {
- imx->config = imx_pwm_config_v1;
- imx->set_enable = imx_pwm_set_enable_v1;
- } else {
- imx->config = imx_pwm_config_v2;
- imx->set_enable = imx_pwm_set_enable_v2;
- }
+ data = of_id->data;
+ imx->config = data->config;
+ imx->set_enable = data->set_enable;
ret = pwmchip_add(&imx->chip);
if (ret < 0)
@@ -265,7 +290,8 @@ static int __devexit imx_pwm_remove(struct platform_device *pdev)
static struct platform_driver imx_pwm_driver = {
.driver = {
- .name = "mxc_pwm",
+ .name = "imx-pwm",
+ .of_match_table = of_match_ptr(imx_pwm_dt_ids),
},
.probe = imx_pwm_probe,
.remove = __devexit_p(imx_pwm_remove),

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