diff options
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-tpm.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/pwm/pwm-tpm.c b/drivers/pwm/pwm-tpm.c index f15dc616437e..98cdcceb5f11 100644 --- a/drivers/pwm/pwm-tpm.c +++ b/drivers/pwm/pwm-tpm.c @@ -1,5 +1,5 @@ /* - * Copyright 2017 NXP. + * Copyright 2017-2018 NXP. * * The code contained herein is licensed under the GNU General Public * License. You may obtain a copy of the GNU General Public License @@ -53,7 +53,7 @@ static int tpm_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, int duty_ns, int period_ns) { struct tpm_pwm_chip *tpm = to_tpm_pwm_chip(chip); - int ret, div = 0; + int ret, val, div = 0; unsigned int period_cycles, duty_cycles; unsigned long rate; u64 c; @@ -78,6 +78,12 @@ static int tpm_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, return ret; } + /* set the pre-scale */ + val = readl(tpm->base + TPM_SC); + val &= ~0x7; + val |= div; + writel(val, tpm->base + TPM_SC); + period_cycles = c; c *= duty_ns; do_div(c, period_ns); |