diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2013-07-26 00:27:41 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2013-09-03 13:09:15 +0200 |
| commit | 382457e562bbb1ea7d94923e58fcbac9e981ff18 (patch) | |
| tree | 47280d1a49086517f0ac7b0b3d81087310297194 /drivers/pwm | |
| parent | eb9bdef111b82389f9b7943bc29fb72c3a0fa5b0 (diff) | |
pwm: renesas-tpu: Add DT support
Specify DT bindings for the TPU PWM controller and add OF support to the
driver.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-renesas-tpu.c | 41 |
1 files changed, 34 insertions, 7 deletions
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c index 2600892782c1..3eeffff69280 100644 --- a/drivers/pwm/pwm-renesas-tpu.c +++ b/drivers/pwm/pwm-renesas-tpu.c @@ -20,6 +20,7 @@ #include <linux/ioport.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/of.h> #include <linux/platform_data/pwm-renesas-tpu.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> @@ -86,7 +87,7 @@ struct tpu_pwm_device { struct tpu_device { struct platform_device *pdev; - struct tpu_pwm_platform_data *pdata; + enum pwm_polarity polarities[TPU_CHANNEL_MAX]; struct pwm_chip chip; spinlock_t lock; @@ -228,8 +229,7 @@ static int tpu_pwm_request(struct pwm_chip *chip, struct pwm_device *_pwm) pwm->tpu = tpu; pwm->channel = _pwm->hwpwm; - pwm->polarity = tpu->pdata ? tpu->pdata->channels[pwm->channel].polarity - : PWM_POLARITY_NORMAL; + pwm->polarity = tpu->polarities[pwm->channel]; pwm->prescaler = 0; pwm->period = 0; pwm->duty = 0; @@ -388,6 +388,16 @@ static const struct pwm_ops tpu_pwm_ops = { * Probe and remove */ +static void tpu_parse_pdata(struct tpu_device *tpu) +{ + struct tpu_pwm_platform_data *pdata = tpu->pdev->dev.platform_data; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(tpu->polarities); ++i) + tpu->polarities[i] = pdata ? pdata->channels[i].polarity + : PWM_POLARITY_NORMAL; +} + static int tpu_probe(struct platform_device *pdev) { struct tpu_device *tpu; @@ -400,7 +410,11 @@ static int tpu_probe(struct platform_device *pdev) return -ENOMEM; } - tpu->pdata = pdev->dev.platform_data; + spin_lock_init(&tpu->lock); + tpu->pdev = pdev; + + /* Initialize device configuration from platform data. */ + tpu_parse_pdata(tpu); /* Map memory, get clock and pin control. */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -422,11 +436,10 @@ static int tpu_probe(struct platform_device *pdev) /* Initialize and register the device. */ platform_set_drvdata(pdev, tpu); - spin_lock_init(&tpu->lock); - tpu->pdev = pdev; - tpu->chip.dev = &pdev->dev; tpu->chip.ops = &tpu_pwm_ops; + tpu->chip.of_xlate = of_pwm_xlate_with_flags; + tpu->chip.of_pwm_n_cells = 3; tpu->chip.base = -1; tpu->chip.npwm = TPU_CHANNEL_MAX; @@ -457,12 +470,26 @@ static int tpu_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_OF +static const struct of_device_id tpu_of_table[] = { + { .compatible = "renesas,tpu-r8a73a4", }, + { .compatible = "renesas,tpu-r8a7740", }, + { .compatible = "renesas,tpu-r8a7790", }, + { .compatible = "renesas,tpu-sh7372", }, + { .compatible = "renesas,tpu", }, + { }, +}; + +MODULE_DEVICE_TABLE(of, tpu_of_table); +#endif + static struct platform_driver tpu_driver = { .probe = tpu_probe, .remove = tpu_remove, .driver = { .name = "renesas-tpu-pwm", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(tpu_of_table), } }; |