These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / pwm / pwm-atmel-tcb.c

diff --git a/kernel/drivers/pwm/pwm-atmel-tcb.c b/kernel/drivers/pwm/pwm-atmel-tcb.c
index d14e067..75db585 100644 (file)
--- a/kernel/drivers/pwm/pwm-atmel-tcb.c
+++ b/kernel/drivers/pwm/pwm-atmel-tcb.c
@@ -305,7 +305,7 @@ static int atmel_tcb_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
         */
        if (i == 5) {
                i = slowclk;
-               rate = 32768;
+               rate = clk_get_rate(tc->slow_clk);
                min = div_u64(NSEC_PER_SEC, rate);
                max = min << tc->tcb_config->counter_width;
 
@@ -347,7 +347,7 @@ static int atmel_tcb_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
        tcbpwm->duty = duty;
 
        /* If the PWM is enabled, call enable to apply the new conf */
-       if (test_bit(PWMF_ENABLED, &pwm->flags))
+       if (pwm_is_enabled(pwm))
                atmel_tcb_pwm_enable(chip, pwm);
 
        return 0;
@@ -387,9 +387,9 @@ static int atmel_tcb_pwm_probe(struct platform_device *pdev)
 
        tcbpwm = devm_kzalloc(&pdev->dev, sizeof(*tcbpwm), GFP_KERNEL);
        if (tcbpwm == NULL) {
-               atmel_tc_free(tc);
+               err = -ENOMEM;
                dev_err(&pdev->dev, "failed to allocate memory\n");
-               return -ENOMEM;
+               goto err_free_tc;
        }
 
        tcbpwm->chip.dev = &pdev->dev;
@@ -400,17 +400,27 @@ static int atmel_tcb_pwm_probe(struct platform_device *pdev)
        tcbpwm->chip.npwm = NPWM;
        tcbpwm->tc = tc;
 
+       err = clk_prepare_enable(tc->slow_clk);
+       if (err)
+               goto err_free_tc;
+
        spin_lock_init(&tcbpwm->lock);
 
        err = pwmchip_add(&tcbpwm->chip);
-       if (err < 0) {
-               atmel_tc_free(tc);
-               return err;
-       }
+       if (err < 0)
+               goto err_disable_clk;
 
        platform_set_drvdata(pdev, tcbpwm);
 
        return 0;
+
+err_disable_clk:
+       clk_disable_unprepare(tcbpwm->tc->slow_clk);
+
+err_free_tc:
+       atmel_tc_free(tc);
+
+       return err;
 }
 
 static int atmel_tcb_pwm_remove(struct platform_device *pdev)
@@ -418,6 +428,8 @@ static int atmel_tcb_pwm_remove(struct platform_device *pdev)
        struct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev);
        int err;
 
+       clk_disable_unprepare(tcbpwm->tc->slow_clk);
+
        err = pwmchip_remove(&tcbpwm->chip);
        if (err < 0)
                return err;