[PATCH v4 5/5] i2c: tegra: Add Tegra264 support
From: Kartik Rajput <hidden>
Date: 2025-08-18 09:25:08
Also in:
linux-i2c, linux-tegra, lkml
Subsystem:
i2c subsystem, i2c subsystem host drivers, tegra i2c driver, the rest · Maintainers:
Andi Shyti, Laxman Dewangan, Linus Torvalds
From: Akhil R <akhilrajeev@nvidia.com> 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 <redacted> --- v1 -> v4: * Update commit message to mention the SW mutex feature available on Tegra264. --- drivers/i2c/busses/i2c-tegra.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 4b889dc66ba7..53bd1e38ff94 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c@@ -1773,7 +1773,36 @@ static const struct tegra_i2c_hw_feature tegra194_i2c_hw = { .has_mutex = false, }; +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, + .quirks = &tegra194_i2c_quirks, + .supports_bus_clear = true, + .has_apb_dma = false, + .tlow_std_mode = 0x8, + .thigh_std_mode = 0x7, + .tlow_fast_fastplus_mode = 0x2, + .thigh_fast_fastplus_mode = 0x2, + .tlow_hs_mode = 0x4, + .thigh_hs_mode = 0x2, + .setup_hold_time_std_mode = 0x08080808, + .setup_hold_time_fast_fast_plus_mode = 0x02020202, + .setup_hold_time_hs_mode = 0x090909, + .has_interface_timing_reg = true, + .has_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,tegra194-i2c", .data = &tegra194_i2c_hw, }, { .compatible = "nvidia,tegra186-i2c", .data = &tegra186_i2c_hw, }, #if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC)
--
2.43.0