diff options
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-tiehrpwm.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c index d3c1dff0a0d..565f96ad278 100644 --- a/drivers/pwm/pwm-tiehrpwm.c +++ b/drivers/pwm/pwm-tiehrpwm.c @@ -115,6 +115,7 @@ struct ehrpwm_pwm_chip { void __iomem *mmio_base; unsigned long period_cycles[NUM_PWM_CHANNEL]; enum pwm_polarity polarity[NUM_PWM_CHANNEL]; + struct clk *tbclk; }; static inline struct ehrpwm_pwm_chip *to_ehrpwm_pwm_chip(struct pwm_chip *chip) @@ -335,6 +336,9 @@ static int ehrpwm_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) /* Channels polarity can be configured from action qualifier module */ configure_polarity(pc, pwm->hwpwm); + /* Enable TBCLK before enabling PWM device */ + clk_enable(pc->tbclk); + /* Enable time counter for free_run */ ehrpwm_modify(pc->mmio_base, TBCTL, TBCTL_RUN_MASK, TBCTL_FREE_RUN); return 0; @@ -363,6 +367,9 @@ static void ehrpwm_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) ehrpwm_modify(pc->mmio_base, AQCSFRC, aqcsfrc_mask, aqcsfrc_val); + /* Disabling TBCLK on PWM disable */ + clk_disable(pc->tbclk); + /* Stop Time base counter */ ehrpwm_modify(pc->mmio_base, TBCTL, TBCTL_RUN_MASK, TBCTL_STOP_NEXT); @@ -432,6 +439,13 @@ static int __devinit ehrpwm_pwm_probe(struct platform_device *pdev) if (!pc->mmio_base) return -EADDRNOTAVAIL; + /* Acquire tbclk for Time Base EHRPWM submodule */ + pc->tbclk = devm_clk_get(&pdev->dev, "tbclk"); + if (IS_ERR(pc->tbclk)) { + dev_err(&pdev->dev, "Failed to get tbclk\n"); + return PTR_ERR(pc->tbclk); + } + ret = pwmchip_add(&pc->chip); if (ret < 0) { dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret); |