[PATCH v4 5/9] driver: pwm: pwm-imx: get and enable per/ipg clock using dm

[Tommaso Merciai]

Get and enable ipg/per pwms clocks using dm api into imx_pwm_of_to_plat
and imx_pwm_probe driver function

Signed-off-by: Tommaso Merciai <tommaso.merciai at amarulasolutions.com>
---
Changes since v4:
 - Fix ipg/per clk declaration
 - Fix clk_get_by_name call
 - Fix clk_enable call

 drivers/pwm/pwm-imx.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 67dad21295..74b0817a05 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -24,6 +24,7 @@ int pwm_init(int pwm_id, int div, int invert)
 	writel(0, &pwm->ir);
 	return 0;
 }
+#include <clk.h>
 
 int pwm_config_internal(struct pwm_regs *pwm, unsigned long period_cycles,
 			unsigned long duty_cycles, unsigned long prescale)
@@ -148,6 +149,8 @@ void pwm_disable(int pwm_id)
 struct imx_pwm_priv {
 	struct pwm_regs *regs;
 	bool invert;
+	struct clk per_clk;
+	struct clk ipg_clk;
 };
 
 static int imx_pwm_set_invert(struct udevice *dev, uint channel,
@@ -193,15 +196,43 @@ static int imx_pwm_set_enable(struct udevice *dev, uint channel, bool enable)
 
 static int imx_pwm_of_to_plat(struct udevice *dev)
 {
+	int ret;
 	struct imx_pwm_priv *priv = dev_get_priv(dev);
 
 	priv->regs = dev_read_addr_ptr(dev);
 
+	ret = clk_get_by_name(dev, "per", &priv->per_clk);
+	if (ret) {
+		printf("Failed to get per_clk\n");
+		return ret;
+	}
+
+	ret = clk_get_by_name(dev, "ipg", &priv->ipg_clk);
+	if (ret) {
+		printf("Failed to get ipg_clk\n");
+		return ret;
+	}
+
 	return 0;
 }
 
 static int imx_pwm_probe(struct udevice *dev)
 {
+	int ret;
+	struct imx_pwm_priv *priv = dev_get_priv(dev);
+
+	ret = clk_enable(&priv->per_clk);
+	if (ret) {
+		printf("Failed to enable per_clk\n");
+		return ret;
+	}
+
+	ret = clk_enable(&priv->ipg_clk);
+	if (ret) {
+		printf("Failed to enable ipg_clk\n");
+		return ret;
+	}
+
 	return 0;
 }
 
-- 
2.25.1