diff options
| author | Ray Liu <[email protected]> | 2026-01-02 21:25:00 +0800 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2026-01-16 09:53:57 -0600 |
| commit | 7cb79f8d3d55aaadff5b131aaf29aa176828a57b (patch) | |
| tree | 1f4d8a133435280fe5abde6db82ed31879a80a32 | |
| parent | 5665d1f4e7cfd6895417d199dd7db73500c5d36c (diff) | |
arm: dts: an7581: set r_smpl for MMC in U-Boot
When booting from SPI, the ROM code does not initialize the MMC
controller on AN7581. As a result, the first MMC initialization
is performed by U-Boot.
In this case, the r_smpl bit is left uninitialized, which may
cause incorrect sampling timing during early MMC access.
Set the r_smpl bit explicitly in the U-Boot device tree to ensure
reliable MMC initialization.
This change is limited to the U-Boot-specific device tree.
The Linux MMC driver already performs runtime delay detection
and does not require a fixed r_smpl setting.
Signed-off-by: Ray Liu <[email protected]>
| -rw-r--r-- | arch/arm/dts/an7581-u-boot.dtsi | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/dts/an7581-u-boot.dtsi b/arch/arm/dts/an7581-u-boot.dtsi index a9297ca6503..7fc71d471c4 100644 --- a/arch/arm/dts/an7581-u-boot.dtsi +++ b/arch/arm/dts/an7581-u-boot.dtsi @@ -84,6 +84,7 @@ reg = <0x0 0x1fa0e000 0x0 0x1000>, <0x0 0x1fa0c000 0x0 0x60>; interrupts = <GIC_SPI 170 IRQ_TYPE_LEVEL_HIGH>; + r_smpl = <1>; clocks = <&scuclk EN7581_CLK_EMMC>, <&clk25m>; clock-names = "source", "hclk"; bus-width = <4>; |