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Subject[PATCHv4 06/10] mfd: ti-lmu: add PWM support
Date
This adds support to acquire the optional PWM channel,
that can be used by some of the LMU variants.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
---
drivers/mfd/ti-lmu.c | 11 +++++++++++
include/linux/mfd/ti-lmu.h | 3 +++
2 files changed, 14 insertions(+)

diff --git a/drivers/mfd/ti-lmu.c b/drivers/mfd/ti-lmu.c
index ce16c896879b..f43b8acc30e1 100644
--- a/drivers/mfd/ti-lmu.c
+++ b/drivers/mfd/ti-lmu.c
@@ -183,6 +183,17 @@ static int ti_lmu_probe(struct i2c_client *cl, const struct i2c_device_id *id)
return ret;
}

+ lmu->pwm = devm_pwm_get(dev, "lmu-backlight");
+ if (IS_ERR(lmu->pwm)) {
+ ret = PTR_ERR(lmu->pwm);
+ if (ret != -EINVAL) {
+ dev_err(dev, "Failed to get PWM: %d\n", ret);
+ return ret;
+ }
+
+ lmu->pwm = NULL;
+ }
+
ret = ti_lmu_enable_hw(lmu, id->driver_data);
if (ret)
return ret;
diff --git a/include/linux/mfd/ti-lmu.h b/include/linux/mfd/ti-lmu.h
index 1ef51ed36be5..246ab5145dff 100644
--- a/include/linux/mfd/ti-lmu.h
+++ b/include/linux/mfd/ti-lmu.h
@@ -17,6 +17,7 @@
#include <linux/notifier.h>
#include <linux/regmap.h>
#include <linux/gpio/consumer.h>
+#include <linux/pwm.h>

/* Notifier event */
#define LMU_EVENT_MONITOR_DONE 0x01
@@ -77,12 +78,14 @@ enum lm363x_regulator_id {
* @dev: Parent device pointer
* @regmap: Used for i2c communcation on accessing registers
* @en_gpio: GPIO for HWEN pin [Optional]
+ * @pwm: PWM for module [Optional]
* @notifier: Notifier for reporting hwmon event
*/
struct ti_lmu {
struct device *dev;
struct regmap *regmap;
struct gpio_desc *en_gpio;
+ struct pwm_device *pwm;
struct blocking_notifier_head notifier;
};
#endif
--
2.16.2
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