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pwm: pwm-mediatek: Add support for PWM IP V3.0.2 in MT6991/MT8196

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Add support for the PWM IP version 3.0.2, found in MediaTek's
Dimensity 9400 MT6991 and in the MT8196 Chromebook SoC: this
needs a new register offset array and also a different offset
for the PWM_CK_26M_SEL register.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20250623120118.109170-4-angelogioacchino.delregno@collabora.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
This commit is contained in:
AngeloGioacchino Del Regno 2025-06-23 14:01:18 +02:00 committed by Uwe Kleine-König
parent d4f1e7a2fe
commit e47026facf
1 changed files with 14 additions and 0 deletions
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14
drivers/pwm/pwm-mediatek.c
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@ -29,6 +29,7 @@
#define PWM45DWIDTH_FIXUP 0x30
#define PWMTHRES 0x30
#define PWM45THRES_FIXUP 0x34
#define PWM_CK_26M_SEL_V3 0x74
#define PWM_CK_26M_SEL 0x210
#define PWM_CLK_DIV_MAX 7
@ -64,6 +65,11 @@ static const unsigned int mtk_pwm_reg_offset_v2[] = {
0x0080, 0x00c0, 0x0100, 0x0140, 0x0180, 0x01c0, 0x0200, 0x0240
};
/* PWM IP Version 3.0.2 */
static const unsigned int mtk_pwm_reg_offset_v3[] = {
0x0100, 0x0200, 0x0300, 0x0400, 0x0500, 0x0600, 0x0700, 0x0800
};
static inline struct pwm_mediatek_chip *
to_pwm_mediatek_chip(struct pwm_chip *chip)
{
@ -369,9 +375,17 @@ static const struct pwm_mediatek_of_data mt8516_pwm_data = {
.reg_offset = mtk_pwm_reg_offset_v1,
};
static const struct pwm_mediatek_of_data mt6991_pwm_data = {
.num_pwms = 4,
.pwm45_fixup = false,
.pwm_ck_26m_sel_reg = PWM_CK_26M_SEL_V3,
.reg_offset = mtk_pwm_reg_offset_v3,
};
static const struct of_device_id pwm_mediatek_of_match[] = {
{ .compatible = "mediatek,mt2712-pwm", .data = &mt2712_pwm_data },
{ .compatible = "mediatek,mt6795-pwm", .data = &mt6795_pwm_data },
{ .compatible = "mediatek,mt6991-pwm", .data = &mt6991_pwm_data },
{ .compatible = "mediatek,mt7622-pwm", .data = &mt7622_pwm_data },
{ .compatible = "mediatek,mt7623-pwm", .data = &mt7623_pwm_data },
{ .compatible = "mediatek,mt7628-pwm", .data = &mt7628_pwm_data },