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LEDs fixes for 6.4-rc5

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Here's a fix for a regression in 6.4-rc1 which broke the backlight on
 machines such as the Lenovo ThinkPad X13s.
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Merge tag 'leds-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/linux

Pull LED fix from Johan Hovold:
 "Here's a fix for a regression in 6.4-rc1 which broke the backlight on
  machines such as the Lenovo ThinkPad X13s"

Acked-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/lkml/20230602091928.GR449117@google.com/

* tag 'leds-6.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/linux:
  leds: qcom-lpg: Fix PWM period limits
This commit is contained in:
Linus Torvalds 2023-06-03 13:46:11 -04:00
commit d1b65edf4d
1 changed files with 4 additions and 4 deletions
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8
drivers/leds/rgb/leds-qcom-lpg.c
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@ -312,14 +312,14 @@ static int lpg_calc_freq(struct lpg_channel *chan, uint64_t period)
max_res = LPG_RESOLUTION_9BIT;
}
min_period = (u64)NSEC_PER_SEC *
div64_u64((1 << pwm_resolution_arr[0]), clk_rate_arr[clk_len - 1]);
min_period = div64_u64((u64)NSEC_PER_SEC * (1 << pwm_resolution_arr[0]),
clk_rate_arr[clk_len - 1]);
if (period <= min_period)
return -EINVAL;
/* Limit period to largest possible value, to avoid overflows */
max_period = (u64)NSEC_PER_SEC * max_res * LPG_MAX_PREDIV *
div64_u64((1 << LPG_MAX_M), 1024);
max_period = div64_u64((u64)NSEC_PER_SEC * max_res * LPG_MAX_PREDIV * (1 << LPG_MAX_M),
1024);
if (period > max_period)
period = max_period;