pwm: Add MediaTek MT8183 display PWM driver support

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>

diff --git a/drivers/pwm/pwm-mtk-disp.c b/drivers/pwm/pwm-mtk-disp.c
index 893940d..15803c7 100644 (file)
--- a/drivers/pwm/pwm-mtk-disp.c
+++ b/drivers/pwm/pwm-mtk-disp.c
@@ -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);