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ARC: [plat-hsdk]: migrate to DM_MMC

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Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
Eugeniy Paltsev 2019-02-25 18:35:29 +03:00 committed by Alexey Brodkin
parent 15736e288e
commit 54858311df
3 changed files with 34 additions and 35 deletions
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26
arch/arc/dts/hsdk.dts
View File

@ -86,6 +86,32 @@
reg = <0xf0060000 0x100>;
};
mmcclk_ciu: mmcclk-ciu {
compatible = "fixed-clock";
/*
* DW sdio controller has external ciu clock divider
* controlled via register in SDIO IP. Due to its
* unexpected default value (it should divide by 1
* but it divides by 8) SDIO IP uses wrong clock and
* works unstable (see STAR 9001204800)
* We switched to the minimum possible value of the
* divisor (div-by-2) in HSDK platform code.
* So default mmcclk ciu clock is 50000000 Hz.
*/
clock-frequency = <50000000>;
#clock-cells = <0>;
};
mmc: mmc0@f000a000 {
compatible = "snps,dw-mshc";
reg = <0xf000a000 0x400>;
bus-width = <4>;
fifo-depth = <256>;
clocks = <&cgu_clk CLK_SYS_SDIO>, <&mmcclk_ciu>;
clock-names = "biu", "ciu";
max-frequency = <25000000>;
};
spi0: spi@f0020000 {
compatible = "snps,dw-apb-ssi";
reg = <0xf0020000 0x1000>;

41
board/synopsys/hsdk/hsdk.c
View File

@ -982,6 +982,12 @@ int board_early_init_f(void)
*/
init_memory_bridge();
/*
* Switch SDIO external ciu clock divider from default div-by-8 to
* minimum possible div-by-2.
*/
writel(SDIO_UHS_REG_EXT_DIV_2, (void __iomem *)SDIO_UHS_REG_EXT);
return 0;
}
@ -1019,41 +1025,6 @@ int board_late_init(void)
return 0;
}
int board_mmc_getcd(struct mmc *mmc)
{
struct dwmci_host *host = mmc->priv;
return !(dwmci_readl(host, DWMCI_CDETECT) & 1);
}
int board_mmc_init(bd_t *bis)
{
struct dwmci_host *host = NULL;
host = malloc(sizeof(struct dwmci_host));
if (!host) {
printf("dwmci_host malloc fail!\n");
return 1;
}
/*
* Switch SDIO external ciu clock divider from default div-by-8 to
* minimum possible div-by-2.
*/
writel(SDIO_UHS_REG_EXT_DIV_2, (void __iomem *)SDIO_UHS_REG_EXT);
memset(host, 0, sizeof(struct dwmci_host));
host->name = "Synopsys Mobile storage";
host->ioaddr = (void *)ARC_DWMMC_BASE;
host->buswidth = 4;
host->dev_index = 0;
host->bus_hz = 50000000;
add_dwmci(host, host->bus_hz / 2, 400000);
return 0;
}
int checkboard(void)
{
puts("Board: Synopsys ARC HS Development Kit\n");

2
configs/hsdk_defconfig
View File

@ -38,7 +38,9 @@ CONFIG_CLK_HSDK=y
CONFIG_DM_GPIO=y
CONFIG_HSDK_CREG_GPIO=y
CONFIG_MMC=y
CONFIG_DM_MMC=y
CONFIG_MMC_DW=y
CONFIG_MMC_DW_SNPS=y
CONFIG_DM_SPI_FLASH=y
CONFIG_SPI_FLASH=y
CONFIG_SPI_FLASH_SST=y