diff mbox series

[v2,2/2] pwm: mediatek: Add support for MT7981

Message ID 7c6e31c844642c199f223f4229a04a37b57a34f3.1681992038.git.daniel@makrotopia.org (mailing list archive)
State New, archived
Headers show
Series Support PWM on MediaTek MT7981 | expand

Commit Message

Daniel Golle April 20, 2023, 12:36 p.m. UTC 
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.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
Changes since v1:
 * use pointer to reg_offset instead of u8 reg_ver and if-else

 drivers/pwm/pwm-mediatek.c | 39 ++++++++++++++++++++++++++++++--------
 1 file changed, 31 insertions(+), 8 deletions(-)

Comments

AngeloGioacchino Del Regno April 20, 2023, 2:32 p.m. UTC | #1 
Il 20/04/23 14:36, Daniel Golle ha scritto:
> 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.
> 
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>

The implementation is good now; there's only one nitpick: you're reordering
the platform data entries and I agree about doing that, as they should be
alphabetically sorted, but you didn't mention that in the commit message.

Please send a v3 that mentions that you're also reordering.

"...while at it, also reorder..."

After which:

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
diff mbox series

Patch

diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index 5b5eeaff35da6..7a51d210a8778 100644
--- a/drivers/pwm/pwm-mediatek.c
+++ b/drivers/pwm/pwm-mediatek.c
@@ -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;
 };
 
 /**
@@ -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)
 {
@@ -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,
@@ -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[] = {
@@ -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 },