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| author | Siew Chin Lim <elly.siew.chin.lim@intel.com> | 2020-12-24 13:21:03 +0300 |
|---|---|---|
| committer | Ley Foon Tan <ley.foon.tan@intel.com> | 2021-01-15 12:48:36 +0300 |
| commit | d456dfbaa0d8e43991791723cbcd0b9def95fd8d (patch) | |
| tree | f0611d062687e25e4d47aa8d84ff2a69bf71261b /drivers/mmc/dw_mmc.c | |
| parent | 2e54a1d46c143f12653a44c8485e7d8bfd573b1d (diff) | |
| download | u-boot-d456dfbaa0d8e43991791723cbcd0b9def95fd8d.tar.xz | |
mmc: dwmmc: Change designware MMC 'clksel' callback function to return status
Change 'clksel' callback function to allow the code to return a
status.
This patch is a preparation for enabling Arm-Trusted-Firmware (ATF)
in Intel SoC FPGA. This patch does not change functionality.
When using Arm-Trusted-Firmware (ATF) in Intel SoC FPGA, the MMC clock
related register is secure register which is required to be written
via SMC/PCSI call. It is possible that U-Boot fail to write the
register if there is unexpected error between U-Boot and ATF.
As a result, there maybe signal integrity on MMC connection due to
clock. So, the code should reports error to user when 'clksel' fail.
Signed-off-by: Siew Chin Lim <elly.siew.chin.lim@intel.com>
Diffstat (limited to 'drivers/mmc/dw_mmc.c')
| -rw-r--r-- | drivers/mmc/dw_mmc.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c index 7702f4be3f..7c8a312fa7 100644 --- a/drivers/mmc/dw_mmc.c +++ b/drivers/mmc/dw_mmc.c @@ -496,8 +496,13 @@ static int dwmci_set_ios(struct mmc *mmc) dwmci_writel(host, DWMCI_UHS_REG, regs); - if (host->clksel) - host->clksel(host); + if (host->clksel) { + int ret; + + ret = host->clksel(host); + if (ret) + return ret; + } #if CONFIG_IS_ENABLED(DM_REGULATOR) if (mmc->vqmmc_supply) { |