diff options
| author |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-12-14 16:27:23 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-12-14 16:27:23 -0800 |
| commit | 4b4193256c8d3bc3a5397b5cd9494c2ad386317d (patch) | |
| tree | b6b070f8893384b5d563fc616018e7d5644b2ece /drivers/pwm/pwm-imx27.c | |
| parent | Input: goodix - add upside-down quirk for Teclast X98 Pro tablet (diff) | |
| parent | Input: da7280 - fix spelling mistake "sequemce" -> "sequence" (diff) | |
| download | linux-rng-4b4193256c8d3bc3a5397b5cd9494c2ad386317d.tar.xz linux-rng-4b4193256c8d3bc3a5397b5cd9494c2ad386317d.zip | |
Merge branch 'next' into for-linus
Prepare input updates for 5.11 merge window.
Diffstat (limited to 'drivers/pwm/pwm-imx27.c')
| -rw-r--r-- | drivers/pwm/pwm-imx27.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/pwm/pwm-imx27.c b/drivers/pwm/pwm-imx27.c index a6e40d4c485f..c50d453552bd 100644 --- a/drivers/pwm/pwm-imx27.c +++ b/drivers/pwm/pwm-imx27.c @@ -150,13 +150,12 @@ static void pwm_imx27_get_state(struct pwm_chip *chip, prescaler = MX3_PWMCR_PRESCALER_GET(val); pwm_clk = clk_get_rate(imx->clk_per); - pwm_clk = DIV_ROUND_CLOSEST_ULL(pwm_clk, prescaler); val = readl(imx->mmio_base + MX3_PWMPR); period = val >= MX3_PWMPR_MAX ? MX3_PWMPR_MAX : val; /* PWMOUT (Hz) = PWMCLK / (PWMPR + 2) */ - tmp = NSEC_PER_SEC * (u64)(period + 2); - state->period = DIV_ROUND_CLOSEST_ULL(tmp, pwm_clk); + tmp = NSEC_PER_SEC * (u64)(period + 2) * prescaler; + state->period = DIV_ROUND_UP_ULL(tmp, pwm_clk); /* * PWMSAR can be read only if PWM is enabled. If the PWM is disabled, @@ -167,8 +166,8 @@ static void pwm_imx27_get_state(struct pwm_chip *chip, else val = imx->duty_cycle; - tmp = NSEC_PER_SEC * (u64)(val); - state->duty_cycle = DIV_ROUND_CLOSEST_ULL(tmp, pwm_clk); + tmp = NSEC_PER_SEC * (u64)(val) * prescaler; + state->duty_cycle = DIV_ROUND_UP_ULL(tmp, pwm_clk); pwm_imx27_clk_disable_unprepare(imx); } @@ -203,7 +202,7 @@ static void pwm_imx27_wait_fifo_slot(struct pwm_chip *chip, sr = readl(imx->mmio_base + MX3_PWMSR); fifoav = FIELD_GET(MX3_PWMSR_FIFOAV, sr); if (fifoav == MX3_PWMSR_FIFOAV_4WORDS) { - period_ms = DIV_ROUND_UP(pwm_get_period(pwm), + period_ms = DIV_ROUND_UP_ULL(pwm_get_period(pwm), NSEC_PER_MSEC); msleep(period_ms); @@ -220,22 +219,23 @@ static int pwm_imx27_apply(struct pwm_chip *chip, struct pwm_device *pwm, struct pwm_imx27_chip *imx = to_pwm_imx27_chip(chip); struct pwm_state cstate; unsigned long long c; + unsigned long long clkrate; int ret; u32 cr; pwm_get_state(pwm, &cstate); - c = clk_get_rate(imx->clk_per); - c *= state->period; + clkrate = clk_get_rate(imx->clk_per); + c = clkrate * state->period; - do_div(c, 1000000000); + do_div(c, NSEC_PER_SEC); period_cycles = c; prescale = period_cycles / 0x10000 + 1; period_cycles /= prescale; - c = (unsigned long long)period_cycles * state->duty_cycle; - do_div(c, state->period); + c = clkrate * state->duty_cycle; + do_div(c, NSEC_PER_SEC * prescale); duty_cycles = c; /* |