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>
diff --git a/drivers/mmc/socfpga_dw_mmc.c b/drivers/mmc/socfpga_dw_mmc.c
index dc008c5..7d8c452 100644
--- a/drivers/mmc/socfpga_dw_mmc.c
+++ b/drivers/mmc/socfpga_dw_mmc.c
@@ -46,7 +46,7 @@
reset_deassert_bulk(&reset_bulk);
}
-static void socfpga_dwmci_clksel(struct dwmci_host *host)
+static int socfpga_dwmci_clksel(struct dwmci_host *host)
{
struct dwmci_socfpga_priv_data *priv = host->priv;
u32 sdmmc_mask = ((priv->smplsel & 0x7) << SYSMGR_SDMMC_SMPLSEL_SHIFT) |
@@ -66,6 +66,8 @@
/* Enable SDMMC clock */
setbits_le32(socfpga_get_clkmgr_addr() + CLKMGR_PERPLL_EN,
CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK);
+
+ return 0;
}
static int socfpga_dwmmc_get_clk_rate(struct udevice *dev)