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pwm: Add MediaTek MT8183 display PWM driver support

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Use the mtk_pwm_data struction to define different registers
and add MT8183 specific register operations, such as MT8183
doesn't have commit register, needs to disable double buffer
before writing register, and needs to select commit mode
and use PWM_PERIOD/PWM_HIGH_WIDTH.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Jitao Shi 2019-01-22 17:02:43 +08:00 committed by Thierry Reding
parent 7a58fc5448
commit a87b40615a
1 changed files with 11 additions and 0 deletions
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11
drivers/pwm/pwm-mtk-disp.c
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@ -277,10 +277,21 @@ static const struct mtk_pwm_data mt8173_pwm_data = {
.commit_mask = 0x1,
};
static const struct mtk_pwm_data mt8183_pwm_data = {
.enable_mask = BIT(0),
.con0 = 0x18,
.con0_sel = 0x0,
.con1 = 0x1c,
.has_commit = false,
.bls_debug = 0x80,
.bls_debug_mask = 0x3,
};
static const struct of_device_id mtk_disp_pwm_of_match[] = {
{ .compatible = "mediatek,mt2701-disp-pwm", .data = &mt2701_pwm_data},
{ .compatible = "mediatek,mt6595-disp-pwm", .data = &mt8173_pwm_data},
{ .compatible = "mediatek,mt8173-disp-pwm", .data = &mt8173_pwm_data},
{ .compatible = "mediatek,mt8183-disp-pwm", .data = &mt8183_pwm_data},
{ }
};
MODULE_DEVICE_TABLE(of, mtk_disp_pwm_of_match);