The following patches add support for higher speeds in the SD card and eMMC for TI's am65x, j721e, j7200 platforms.
With these patches, the following max speeds are supported: j721e: DDR50, HS200 j7200: SDR104, HS200 am65x: SDR104*, HS200
changes since v5: 1. In patch 1 moved the 5ms delay after setting the 1.8V enable bit 2. In patch 1 added a check to confirm if the output has stabilized. 3. Picked up Reviewed-by from Jaehoon Chung for patch 1
changes since v4: 1. removed patch(15 in v4) that adds support for HS400 in J7200 platform, as there are some errors while switching to HS400 mode. 2. changed the function regulator_set_enable() in patch 1 to regulator_set_enable_if_allowed() as there is a possibility of not having an enable gpio. 3. changed the pin direction from PIN_INPUT to PIN_OUTPUT for pins SPI1_CS1 and SPI0_D1 in patches 13 and 15 (in v4) respectively. 4. changed the configs enabled, to HS200 from HS400 for J7200 in patch 18 (in v4).
changes since v3: 1. changed #if to if(IS_ENABLED()) in patch 1 for MMC_IO_VOLTAGE. 2. changed the format for print statements added in v3 to remove warnings arising when DM_REGULATOR variable is not defined 3. Added a patch to add support for HS400 speed mode in J7200 as it is now supported. 4. edited patch 17 (in v3) to add support for HS400 instead of HS200 as it is now supported in J7200 SoC. 4. Added description for sdhci_set_ctrl_reg() function in include/sdhci.h 5. Added comment for mdelay in patch 1 6. Picked up Reviewed-by's from Jaehoon Chung
changes since v2: 1. Added print statements in case of failure for regulator_set_enable and regulator_set_value function calls in patch 1 2. Removed patch 18 (in v2) as it has been applied by commit [1] 3. renamed the function dev_get_platdata() to dev_get_plat in patch 8 4. rebased all the patches in seriesn
changes since v1: 1. Added patches to support UHS modes for the SD card even in am654x platforms. 2. Fixed an issue with patch 1 that was breaking builds on some platforms.
* There's an issue with the am65x base board such that the power cycle circuit to the card takes way longer than the wait time in mmc core. Until this is fixed, am654x-evm and -idk will only support High speed mode at 3.3V (see patch 20) but this shouldn't block us from adding UHS modes in the dtsi as well as in the configs so other boards can still take advantage of the higher speed. UHS modes have been tested by adding the appropriate delay in the power cycle circuit.
[1] - commit 67507e4aab5b ("sandbox: Fix up building for of-platdata")
Link to v1: https://patchwork.ozlabs.org/project/uboot/list/?series=206622
Faiz Abbas (20): mmc: sdhci: Add helper functions for UHS modes mmc: am654_sdhci: Unconditionally switch off DLL in the beginning of ios_post() mmc: am654_sdhci: Convert flag fields to BIT macro mmc: am654_sdhci: Add flag for PHY calibration mmc: am654_sdhci: Add support for AM65x SR2.0 mmc: am654_sdhci: Add support for input tap delay mmc: am654_sdhci: Add support for writing to clkbuf_sel mmc: am654_sdhci: Add support for software tuning mmc: am654_sdhci: Fix HISPD bit configuration in some lower speed modes mmc: am654_sdhci: Use sdhci_set_control_reg() arm: dts: k3-am65: Fix mmc nodes arm: dts: k3-j721e-main: Update otap-delay values arm: dts: k3-j721e-common-proc-board: Add support for UHS modes for SD card arm: dts: k3-j7200-main: Add support for gpio0 arm: dts: k3-j7200-common-proc-board: Enable support for UHS modes configs: j721e_evm: Add support for UHS modes configs: j7200_evm: Add support for UHS modes arm: dts: k3-am65-main: Add itapdly and clkbuf-sel values arm: dts: k3-am654-base-board: Limit Sd card to High speed modes configs: am65x_evm: Add configs for UHS modes
arch/arm/dts/k3-am65-main.dtsi | 31 ++ arch/arm/dts/k3-am654-base-board-u-boot.dtsi | 67 +-- arch/arm/dts/k3-am654-base-board.dts | 26 ++ arch/arm/dts/k3-am654-r5-base-board.dts | 20 +- arch/arm/dts/k3-j7200-common-proc-board.dts | 49 ++- arch/arm/dts/k3-j7200-main.dtsi | 23 ++ .../arm/dts/k3-j7200-r5-common-proc-board.dts | 15 + arch/arm/dts/k3-j721e-common-proc-board.dts | 32 ++ arch/arm/dts/k3-j721e-main.dtsi | 8 +- configs/am65x_evm_a53_defconfig | 8 + configs/am65x_evm_r5_defconfig | 2 + configs/j7200_evm_a72_defconfig | 8 + configs/j7200_evm_r5_defconfig | 1 + configs/j721e_evm_a72_defconfig | 8 + configs/j721e_evm_r5_defconfig | 1 + drivers/mmc/Kconfig | 1 + drivers/mmc/am654_sdhci.c | 384 +++++++++++++----- drivers/mmc/sdhci.c | 95 +++++ include/sdhci.h | 10 + 19 files changed, 616 insertions(+), 173 deletions(-)