Add support for the I2C units found in the MediaTek MT7981 and MT7988
SoCs. Just like other recent MediaTek I2C units that also uses v3
register offsets (which differ from v2 only by OFFSET_SLAVE_ADDR being
0x94 instead of 0x4).

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 drivers/i2c/busses/i2c-mt65xx.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 59eaefe999b11..a43c4d77739ab 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -431,6 +431,18 @@ static const struct mtk_i2c_compatible mt8168_compat = {
 	.max_dma_support = 33,
 };
 
+static const struct mtk_i2c_compatible mt7981_compat = {
+	.regs = mt_i2c_regs_v3,
+	.pmic_i2c = 0,
+	.dcm = 0,
+	.auto_restart = 1,
+	.aux_len_reg = 1,
+	.timing_adjust = 1,
+	.dma_sync = 1,
+	.ltiming_adjust = 1,
+	.max_dma_support = 33
+};
+
 static const struct mtk_i2c_compatible mt7986_compat = {
 	.quirks = &mt7622_i2c_quirks,
 	.regs = mt_i2c_regs_v1,
@@ -516,6 +528,7 @@ static const struct of_device_id mtk_i2c_of_match[] = {
 	{ .compatible = "mediatek,mt6577-i2c", .data = &mt6577_compat },
 	{ .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat },
 	{ .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat },
+	{ .compatible = "mediatek,mt7981-i2c", .data = &mt7981_compat },
 	{ .compatible = "mediatek,mt7986-i2c", .data = &mt7986_compat },
 	{ .compatible = "mediatek,mt8168-i2c", .data = &mt8168_compat },
 	{ .compatible = "mediatek,mt8173-i2c", .data = &mt8173_compat },
-- 
2.40.0

On Mon, Apr 10, 2023 at 05:19:38PM +0100, Daniel Golle wrote:
> Add support for the I2C units found in the MediaTek MT7981 and MT7988
> SoCs. Just like other recent MediaTek I2C units that also uses v3
> register offsets (which differ from v2 only by OFFSET_SLAVE_ADDR being
> 0x94 instead of 0x4).
> 
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Applied to for-next, thanks!

On 10/04/2023 18:19, Daniel Golle wrote:
> Add support for the I2C units found in the MediaTek MT7981 and MT7988
> SoCs. Just like other recent MediaTek I2C units that also uses v3
> register offsets (which differ from v2 only by OFFSET_SLAVE_ADDR being
> 0x94 instead of 0x4).

Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>

Il 10/04/23 18:19, Daniel Golle ha scritto:
> Add support for the I2C units found in the MediaTek MT7981 and MT7988
> SoCs. Just like other recent MediaTek I2C units that also uses v3
> register offsets (which differ from v2 only by OFFSET_SLAVE_ADDR being
> 0x94 instead of 0x4).
> 
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>

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