diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-21 09:41:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-21 09:41:28 -0800 |
| commit | 7a693ea78e3c48605a2d849fd241ff15561f10d5 (patch) | |
| tree | f1d3b8939d2abc40d3bb160d2dcaaf696d8de2d6 /drivers/pwm/pwm-tegra.c | |
| parent | 9cf5b508bd260d5693d337bcf1f9b82b961b6137 (diff) | |
| parent | 8fa22f4b88e877c0811d2a0e506cf56755add554 (diff) | |
Merge tag 'pwm/for-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"Various changes across the board, mostly improvements and cleanups"
* tag 'pwm/for-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (42 commits)
pwm: pca9685: Convert to i2c's .probe_new()
pwm: sun4i: Propagate errors in .get_state() to the caller
pwm: Handle .get_state() failures
pwm: sprd: Propagate errors in .get_state() to the caller
pwm: rockchip: Propagate errors in .get_state() to the caller
pwm: mtk-disp: Propagate errors in .get_state() to the caller
pwm: imx27: Propagate errors in .get_state() to the caller
pwm: cros-ec: Propagate errors in .get_state() to the caller
pwm: crc: Propagate errors in .get_state() to the caller
leds: qcom-lpg: Propagate errors in .get_state() to the caller
drm/bridge: ti-sn65dsi86: Propagate errors in .get_state() to the caller
pwm/tracing: Also record trace events for failed API calls
pwm: Make .get_state() callback return an error code
pwm: pxa: Enable for MMP platform
pwm: pxa: Add reference manual link and limitations
pwm: pxa: Use abrupt shutdown mode
pwm: pxa: Remove clk enable/disable from pxa_pwm_config
pwm: pxa: Set duty cycle to 0 when disabling PWM
pwm: pxa: Remove pxa_pwm_enable/disable
pwm: mediatek: Add support for MT7986
...
Diffstat (limited to 'drivers/pwm/pwm-tegra.c')
| -rw-r--r-- | drivers/pwm/pwm-tegra.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c index dad9978c9186..249dc0193297 100644 --- a/drivers/pwm/pwm-tegra.c +++ b/drivers/pwm/pwm-tegra.c @@ -145,8 +145,19 @@ static int tegra_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, * source clock rate as required_clk_rate, PWM controller will * be able to configure the requested period. */ - required_clk_rate = - (NSEC_PER_SEC / period_ns) << PWM_DUTY_WIDTH; + required_clk_rate = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC << PWM_DUTY_WIDTH, + period_ns); + + if (required_clk_rate > clk_round_rate(pc->clk, required_clk_rate)) + /* + * required_clk_rate is a lower bound for the input + * rate; for lower rates there is no value for PWM_SCALE + * that yields a period less than or equal to the + * requested period. Hence, for lower rates, double the + * required_clk_rate to get a clock rate that can meet + * the requested period. + */ + required_clk_rate *= 2; err = dev_pm_opp_set_rate(pc->dev, required_clk_rate); if (err < 0) |