From: Akhil R <akhilrajeev@nvidia.com>
Date: Tue, 18 Nov 2025 14:06:20 +0000 (+0530)
Subject: i2c: tegra: Add Tegra264 support
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ac9e16dd226a26a479c7392c9ec28f1c9eec61c;p=thirdparty%2Flinux.git

i2c: tegra: Add Tegra264 support

Add support for Tegra264 SoC which supports 17 generic I2C controllers,
two of which are in the AON (always-on) partition of the SoC. In
addition to the features supported by Tegra194 it also supports a
SW mutex register to allow sharing the same I2C instance across
multiple firmware.

Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
Signed-off-by: Kartik Rajput <kkartik@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 84f2d5f4b794..d05015ef425d 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -1853,7 +1853,40 @@ static const struct tegra_i2c_hw_feature tegra256_i2c_hw = {
 	.has_mutex = true,
 };
 
+static const struct tegra_i2c_hw_feature tegra264_i2c_hw = {
+	.has_continue_xfer_support = true,
+	.has_per_pkt_xfer_complete_irq = true,
+	.clk_divisor_hs_mode = 1,
+	.clk_divisor_std_mode = 0x1d,
+	.clk_divisor_fast_mode = 0x15,
+	.clk_divisor_fast_plus_mode = 0x8,
+	.has_config_load_reg = true,
+	.has_multi_master_mode = true,
+	.has_slcg_override_reg = true,
+	.has_mst_fifo = true,
+	.has_mst_reset = true,
+	.quirks = &tegra194_i2c_quirks,
+	.supports_bus_clear = true,
+	.has_apb_dma = false,
+	.tlow_std_mode = 0x8,
+	.thigh_std_mode = 0x7,
+	.tlow_fast_mode = 0x2,
+	.thigh_fast_mode = 0x2,
+	.tlow_fastplus_mode = 0x2,
+	.thigh_fastplus_mode = 0x2,
+	.tlow_hs_mode = 0x4,
+	.thigh_hs_mode = 0x2,
+	.setup_hold_time_std_mode = 0x08080808,
+	.setup_hold_time_fast_mode = 0x02020202,
+	.setup_hold_time_fastplus_mode = 0x02020202,
+	.setup_hold_time_hs_mode = 0x090909,
+	.has_interface_timing_reg = true,
+	.enable_hs_mode_support = true,
+	.has_mutex = true,
+};
+
 static const struct of_device_id tegra_i2c_of_match[] = {
+	{ .compatible = "nvidia,tegra264-i2c", .data = &tegra264_i2c_hw, },
 	{ .compatible = "nvidia,tegra256-i2c", .data = &tegra256_i2c_hw, },
 	{ .compatible = "nvidia,tegra194-i2c", .data = &tegra194_i2c_hw, },
 	{ .compatible = "nvidia,tegra186-i2c", .data = &tegra186_i2c_hw, },