linux-kernel - [PATCH v2 0/2] leds: rgb: leds-qcom-lpg: Fixes for Hi-Res PWMs

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Message-Id: <20250226-leds-qcom-lpg-fix-max-pwm-on-hi-res-v2-0-7af5ef5d220b@linaro.org>
Date: Wed, 26 Feb 2025 15:58:53 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Lee Jones <lee@...nel.org>, Pavel Machek <pavel@...nel.org>, 
 Anjelique Melendez <quic_amelende@...cinc.com>
Cc: Kamal Wadhwa <quic_kamalw@...cinc.com>, 
 Jishnu Prakash <jishnu.prakash@....qualcomm.com>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Johan Hovold <johan@...nel.org>, 
 Sebastian Reichel <sre@...nel.org>, Pavel Machek <pavel@....cz>, 
 linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Abel Vesa <abel.vesa@...aro.org>, stable@...r.kernel.org
Subject: [PATCH v2 0/2] leds: rgb: leds-qcom-lpg: Fixes for Hi-Res PWMs

The PWM Hi-Res allow configuring the PWM resolution from 8 bits PWM
values up to 15 bits values. The current implementation loops through
all possible resolutions (PWM sizes) on top of the already existing
process of determining the prediv, exponent and refclk.

The first issue is that the maximum value used for capping is wrongly
hardcoded.

The second issue is that it uses the wrong maximum possible PWM
value for determining the best matched period.

Fix both.

Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
---
Changes in v2:
- Re-worded the commit to drop the details that are not important
  w.r.t. what the patch is fixing.
- Added another patch which fixes the resolution used for determining
  best matched period and PWM config.
- Link to v1: https://lore.kernel.org/r/20250220-leds-qcom-lpg-fix-max-pwm-on-hi-res-v1-1-a161ec670ea5@linaro.org

---
Abel Vesa (2):
      leds: rgb: leds-qcom-lpg: Fix pwm resolution max for Hi-Res PWMs
      leds: rgb: leds-qcom-lpg: Fix calculation of best period Hi-Res PWMs

 drivers/leds/rgb/leds-qcom-lpg.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
base-commit: 8433c776e1eb1371f5cd40b5fd3a61f9c7b7f3ad
change-id: 20250220-leds-qcom-lpg-fix-max-pwm-on-hi-res-067e8782a79b

Best regards,
-- 
Abel Vesa <abel.vesa@...aro.org>