[RFC PATCH V2 09/12] dt-bindings: misc: tegra-sdhci: config settings

Krishna Yarlagadda
2024-07-01T15:13:48Z

SDHCI vendor tuning registers are configured using config setting
framework. List available field config for Tegra SDHCI controllers.

Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
---
.../misc/nvidia,tegra-config-settings.yaml | 31 +++++++++++++++++++
1 file changed, 31 insertions(+)

diff --git a/Documentation/devicetree/bindings/misc/nvidia,tegra-config-settings.yaml b/Documentation/devicetree/bindings/misc/nvidia,tegra-config-settings.yaml
index 5f4da633e69b..f4440cb6286d 100644
--- a/Documentation/devicetree/bindings/misc/nvidia,tegra-config-settings.yaml
+++ b/Documentation/devicetree/bindings/misc/nvidia,tegra-config-settings.yaml
@@ -38,6 +38,32 @@ patternProperties:
additionalProperties: false

patternProperties:
+ "^sdhci-[a-z0-9_-]+-cfg$":
+ description: Config settings for SDHCI devices.
+ SDHCI has configuration based on device speed modes.
+ - common is set on all speeds and can be overridden by speed mode.
+ - List of speed modes and their config name
+ "default", /* MMC_TIMING_LEGACY */
+ "sd-mmc-highspeed", /* MMC_TIMING_MMC_HS */
+ "sd-mmc-highspeed", /* MMC_TIMING_SD_HS */
+ "uhs-sdr12", /* MMC_TIMING_UHS_SDR12 */
+ "uhs-sdr25", /* MMC_TIMING_UHS_SDR25 */
+ "uhs-sdr50", /* MMC_TIMING_UHS_SDR50 */
+ "uhs-sdr104", /* MMC_TIMING_UHS_SDR104 */
+ "uhs-ddr52", /* MMC_TIMING_UHS_DDR50 */
+ "uhs-ddr52", /* MMC_TIMING_MMC_DDR52 */
+ "mmc-hs200", /* MMC_TIMING_MMC_HS200 */
+ "mmc-hs400", /* MMC_TIMING_MMC_HS400 */
+ type: object
+ additionalProperties: false
+
+ properties:
+ nvidia,mmc-num-tuning-iter:
+ description: Specify DQS trim value for HS400 timing.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 0
+ maximum: 0xffff
+
"^i2c-[a-z0-9_]+-cfg$":
description: Config settings for I2C devices.
type: object
@@ -124,4 +150,9 @@ examples:
nvidia,i2c-sclk-high-period = <0x07>;
};
};
+ configmmc1: config-mmc3400000 {
+ sdhci-mmc-hs200-cfg {
+ nvidia,mmc-num-tuning-iter = <0x02>;
+ };
+ };
};
--
2.43.2