1 files changed, 16 insertions, 6 deletions

diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c
index 557b4ea16796..bcc55edad9ec 100644
--- a/drivers/pwm/pwm-fsl-ftm.c
+++ b/drivers/pwm/pwm-fsl-ftm.c
@@ -87,6 +87,7 @@ struct fsl_pwm_chip {
 
         int period_ns;
 
+        struct clk *ipg_clk;
         struct clk *clk[FSL_PWM_CLK_MAX];
 };
 
@@ -99,14 +100,14 @@ static int fsl_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
 {
         struct fsl_pwm_chip *fpc = to_fsl_chip(chip);
 
-        return clk_prepare_enable(fpc->clk[FSL_PWM_CLK_SYS]);
+        return clk_prepare_enable(fpc->ipg_clk);
 }
 
 static void fsl_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
 {
         struct fsl_pwm_chip *fpc = to_fsl_chip(chip);
 
-        clk_disable_unprepare(fpc->clk[FSL_PWM_CLK_SYS]);
+        clk_disable_unprepare(fpc->ipg_clk);
 }
 
 static int fsl_pwm_calculate_default_ps(struct fsl_pwm_chip *fpc,
@@ -363,7 +364,7 @@ static int fsl_pwm_init(struct fsl_pwm_chip *fpc)
 {
         int ret;
 
-        ret = clk_prepare_enable(fpc->clk[FSL_PWM_CLK_SYS]);
+        ret = clk_prepare_enable(fpc->ipg_clk);
         if (ret)
                 return ret;
 
@@ -371,7 +372,7 @@ static int fsl_pwm_init(struct fsl_pwm_chip *fpc)
         regmap_write(fpc->regmap, FTM_OUTINIT, 0x00);
         regmap_write(fpc->regmap, FTM_OUTMASK, 0xFF);
 
-        clk_disable_unprepare(fpc->clk[FSL_PWM_CLK_SYS]);
+        clk_disable_unprepare(fpc->ipg_clk);
 
         return 0;
 }
@@ -441,6 +442,15 @@ static int fsl_pwm_probe(struct platform_device *pdev)
         if (IS_ERR(fpc->clk[FSL_PWM_CLK_CNTEN]))
                 return PTR_ERR(fpc->clk[FSL_PWM_CLK_CNTEN]);
 
+        /*
+         * ipg_clk is the interface clock for the IP. If not provided, use the
+         * ftm_sys clock as the default.
+         */
+        fpc->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
+        if (IS_ERR(fpc->ipg_clk))
+                fpc->ipg_clk = fpc->clk[FSL_PWM_CLK_SYS];
+
+
         fpc->chip.ops = &fsl_pwm_ops;
         fpc->chip.of_xlate = of_pwm_xlate_with_flags;
         fpc->chip.of_pwm_n_cells = 3;
@@ -480,7 +490,7 @@ static int fsl_pwm_suspend(struct device *dev)
                 if (!test_bit(PWMF_REQUESTED, &pwm->flags))
                         continue;
 
-                clk_disable_unprepare(fpc->clk[FSL_PWM_CLK_SYS]);
+                clk_disable_unprepare(fpc->ipg_clk);
 
                 if (!pwm_is_enabled(pwm))
                         continue;
@@ -503,7 +513,7 @@ static int fsl_pwm_resume(struct device *dev)
                 if (!test_bit(PWMF_REQUESTED, &pwm->flags))
                         continue;
 
-                clk_prepare_enable(fpc->clk[FSL_PWM_CLK_SYS]);
+                clk_prepare_enable(fpc->ipg_clk);
 
                 if (!pwm_is_enabled(pwm))
                         continue;