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path: root/drivers/pwm/pwm-img.c
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2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 178Thomas Gleixner1-4/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 24 file(s). Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Alexios Zavras <[email protected]> Reviewed-by: Steve Winslow <[email protected]> Reviewed-by: Allison Randal <[email protected]> Reviewed-by: Richard Fontana <[email protected]> Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2019-03-20pwm: img: Turn final 'else if' into 'else' in img_pwm_configNathan Chancellor1-1/+1
When building with -Wsometimes-uninitialized, Clang warns: drivers/pwm/pwm-img.c:126:13: error: variable 'timebase' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized] The final else if functions as an else; make that explicit so that Clang understands that timebase cannot be used uninitialized. Link: https://github.com/ClangBuiltLinux/linux/issues/400 Signed-off-by: Nathan Chancellor <[email protected]> Reviewed-by: Nick Desaulniers <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
2017-11-15pwm: img: Add runtime PMEd Blake1-37/+95
Add runtime PM to disable the clocks when the h/w is not in use. Signed-off-by: Ed Blake <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
2017-11-15pwm: img: Add suspend / resume handlingEd Blake1-1/+65
The power may be disabled during suspend, so implement suspend and resume callbacks to save and restore register state. Signed-off-by: Ed Blake <[email protected]> [[email protected]: guard using PM_SLEEP instead of PM] Signed-off-by: Thierry Reding <[email protected]>
2016-03-23pwm: img: Test clock rate to avoid division by 0Wolfram Sang1-0/+5
The clk API may return 0 on clk_get_rate(), so we should check the result before using it as a divisor. Signed-off-by: Wolfram Sang <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
2015-05-19pwm: img: Impose upper and lower timebase steps valueNaidu Tellapati1-12/+64
The PWM hardware on Pistachio platform has a maximum timebase steps value to 255. To fix it, let's introduce a compatible-specific data structure to contain the SoC-specific details and use it to specify a maximum timebase. Also, let's limit the minimum timebase to 16 steps, to allow a sane range of duty cycle steps. Fixes: 277bb6a29e00 ("pwm: Imagination Technologies PWM DAC driver") Signed-off-by: Naidu Tellapati <[email protected]> Signed-off-by: Ezequiel Garcia <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
2015-01-30pwm: Imagination Technologies PWM DAC driverNaidu Tellapati1-0/+249
The Pistachio SOC from Imagination Technologies includes a Pulse Width Modulation DAC which produces 1 to 4 digital bit-outputs which represent digital waveforms. These PWM outputs are primarily in charge of controlling backlight LED devices. Reviewed-by: Andrew Bresticker <[email protected]> Signed-off-by: Naidu Tellapati <[email protected]> Signed-off-by: Sai Masarapu <[email protected]> Signed-off-by: Ezequiel Garcia <[email protected]> Reviewed-by: Vladimir Zapolskiy <[email protected]> [thierry.reding: fixup license header as discussed on list] Signed-off-by: Thierry Reding <[email protected]>
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