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pwm: mediatek: Add support for MT7981
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The PWM unit on MT7981 uses different register offsets than previous
MediaTek PWM units. Add support for these new offsets and add support
for PWM on MT7981 which has 3 PWM channels, one of them is typically
used for a temperature controlled fan.
While at it, also reorder pwm_mediatek_of_data entries to restore
alphabetic order.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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Daniel Golle authored and Thierry Reding committed Jun 23, 2023
1 parent 88c66e0 commit 967da67
Showing 1 changed file with 31 additions and 8 deletions.
39 changes: 31 additions & 8 deletions drivers/pwm/pwm-mediatek.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ struct pwm_mediatek_of_data {
unsigned int num_pwms;
bool pwm45_fixup;
bool has_ck_26m_sel;
const unsigned int *reg_offset;
};

/**
Expand All @@ -59,10 +60,14 @@ struct pwm_mediatek_chip {
const struct pwm_mediatek_of_data *soc;
};

static const unsigned int pwm_mediatek_reg_offset[] = {
static const unsigned int mtk_pwm_reg_offset_v1[] = {
0x0010, 0x0050, 0x0090, 0x00d0, 0x0110, 0x0150, 0x0190, 0x0220
};

static const unsigned int mtk_pwm_reg_offset_v2[] = {
0x0080, 0x00c0, 0x0100, 0x0140, 0x0180, 0x01c0, 0x0200, 0x0240
};

static inline struct pwm_mediatek_chip *
to_pwm_mediatek_chip(struct pwm_chip *chip)
{
Expand Down Expand Up @@ -111,7 +116,7 @@ static inline void pwm_mediatek_writel(struct pwm_mediatek_chip *chip,
unsigned int num, unsigned int offset,
u32 value)
{
writel(value, chip->regs + pwm_mediatek_reg_offset[num] + offset);
writel(value, chip->regs + chip->soc->reg_offset[num] + offset);
}

static int pwm_mediatek_config(struct pwm_chip *chip, struct pwm_device *pwm,
Expand Down Expand Up @@ -285,60 +290,77 @@ static const struct pwm_mediatek_of_data mt2712_pwm_data = {
.num_pwms = 8,
.pwm45_fixup = false,
.has_ck_26m_sel = false,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct pwm_mediatek_of_data mt6795_pwm_data = {
.num_pwms = 7,
.pwm45_fixup = false,
.has_ck_26m_sel = false,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct pwm_mediatek_of_data mt7622_pwm_data = {
.num_pwms = 6,
.pwm45_fixup = false,
.has_ck_26m_sel = true,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct pwm_mediatek_of_data mt7623_pwm_data = {
.num_pwms = 5,
.pwm45_fixup = true,
.has_ck_26m_sel = false,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct pwm_mediatek_of_data mt7628_pwm_data = {
.num_pwms = 4,
.pwm45_fixup = true,
.has_ck_26m_sel = false,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct pwm_mediatek_of_data mt7629_pwm_data = {
.num_pwms = 1,
.pwm45_fixup = false,
.has_ck_26m_sel = false,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct pwm_mediatek_of_data mt8183_pwm_data = {
.num_pwms = 4,
static const struct pwm_mediatek_of_data mt7981_pwm_data = {
.num_pwms = 3,
.pwm45_fixup = false,
.has_ck_26m_sel = true,
.reg_offset = mtk_pwm_reg_offset_v2,
};

static const struct pwm_mediatek_of_data mt8365_pwm_data = {
.num_pwms = 3,
static const struct pwm_mediatek_of_data mt7986_pwm_data = {
.num_pwms = 2,
.pwm45_fixup = false,
.has_ck_26m_sel = true,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct pwm_mediatek_of_data mt7986_pwm_data = {
.num_pwms = 2,
static const struct pwm_mediatek_of_data mt8183_pwm_data = {
.num_pwms = 4,
.pwm45_fixup = false,
.has_ck_26m_sel = true,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct pwm_mediatek_of_data mt8365_pwm_data = {
.num_pwms = 3,
.pwm45_fixup = false,
.has_ck_26m_sel = true,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct pwm_mediatek_of_data mt8516_pwm_data = {
.num_pwms = 5,
.pwm45_fixup = false,
.has_ck_26m_sel = true,
.reg_offset = mtk_pwm_reg_offset_v1,
};

static const struct of_device_id pwm_mediatek_of_match[] = {
Expand All @@ -348,6 +370,7 @@ static const struct of_device_id pwm_mediatek_of_match[] = {
{ .compatible = "mediatek,mt7623-pwm", .data = &mt7623_pwm_data },
{ .compatible = "mediatek,mt7628-pwm", .data = &mt7628_pwm_data },
{ .compatible = "mediatek,mt7629-pwm", .data = &mt7629_pwm_data },
{ .compatible = "mediatek,mt7981-pwm", .data = &mt7981_pwm_data },
{ .compatible = "mediatek,mt7986-pwm", .data = &mt7986_pwm_data },
{ .compatible = "mediatek,mt8183-pwm", .data = &mt8183_pwm_data },
{ .compatible = "mediatek,mt8365-pwm", .data = &mt8365_pwm_data },
Expand Down

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