linux-kernel - [PATCH 2/2] i2c: mediatek: add support for MT6878 SoC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250920-mt6878-i2c-bringup-v1-2-d1527ffd3cd7@mentallysanemainliners.org>
Date: Sat, 20 Sep 2025 17:31:04 +0200
From: Igor Belwon <igor.belwon@...tallysanemainliners.org>
To: Qii Wang <qii.wang@...iatek.com>, Andi Shyti <andi.shyti@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, linux-i2c@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 Igor Belwon <igor.belwon@...tallysanemainliners.org>
Subject: [PATCH 2/2] i2c: mediatek: add support for MT6878 SoC

Add support for the I2C units found in the MediaTek MT6878 SoC.
Just like other recent MediaTek SoCs, it uses the v3 register offsets
(which differ from v2 only by OFFSET_SLAVE_ADDR being
0x94 instead of 0x4).

Signed-off-by: Igor Belwon <igor.belwon@...tallysanemainliners.org>
---
 drivers/i2c/busses/i2c-mt65xx.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index ab456c3717db18eef74226de0ee88c49228796f5..085702aee006a6dd0ac89d1382a12fbac2d91c55 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -402,6 +402,19 @@ static const struct mtk_i2c_compatible mt6589_compat = {
 	.max_dma_support = 32,
 };
 
+static const struct mtk_i2c_compatible mt6878_compat = {
+	.regs = mt_i2c_regs_v3,
+	.pmic_i2c = 0,
+	.dcm = 0,
+	.auto_restart = 1,
+	.aux_len_reg = 1,
+	.timing_adjust = 1,
+	.dma_sync = 0,
+	.ltiming_adjust = 1,
+	.apdma_sync = 1,
+	.max_dma_support = 36,
+};
+
 static const struct mtk_i2c_compatible mt7622_compat = {
 	.quirks = &mt7622_i2c_quirks,
 	.regs = mt_i2c_regs_v1,
@@ -525,6 +538,7 @@ static const struct of_device_id mtk_i2c_of_match[] = {
 	{ .compatible = "mediatek,mt2712-i2c", .data = &mt2712_compat },
 	{ .compatible = "mediatek,mt6577-i2c", .data = &mt6577_compat },
 	{ .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat },
+	{ .compatible = "mediatek,mt6878-i2c", .data = &mt6878_compat },
 	{ .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat },
 	{ .compatible = "mediatek,mt7981-i2c", .data = &mt7981_compat },
 	{ .compatible = "mediatek,mt7986-i2c", .data = &mt7986_compat },

-- 
2.51.0