From 479e2e301c626cc64fb27b6b1938655eaba8b036 Mon Sep 17 00:00:00 2001
From: Philipp Zabel
Date: Mon, 25 Jun 2012 16:16:25 +0200
Subject: pwm: i.MX: add devicetree support
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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
Signed-off-by: Sascha Hauer
Reviewed-by: Shawn Guo
Reviewed-by: Benoît Thébaudeau
Signed-off-by: Thierry Reding
---
drivers/pwm/pwm-imx.c | 44 +++++++++++++++++++++++++++++++++++---------
1 file changed, 35 insertions(+), 9 deletions(-)
(limited to 'drivers/pwm')
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
#include
#include
+#include
#include
-
/* 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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