diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/exynos_dw_mmc.c | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c index a9e240fd91d..c8bf89d6d35 100644 --- a/drivers/mmc/exynos_dw_mmc.c +++ b/drivers/mmc/exynos_dw_mmc.c @@ -45,7 +45,7 @@ struct exynos_dwmmc_variant { u32 quirks; /* quirk flags - see DWMCI_QUIRK_... */ }; -/* Exynos implmentation specific drver private data */ +/* Exynos implementation specific driver private data */ struct dwmci_exynos_priv_data { #ifdef CONFIG_DM_MMC struct dwmci_host host; @@ -121,10 +121,7 @@ static int exynos_dwmmc_set_sclk(struct dwmci_host *host, unsigned long rate) return 0; } -/* - * Function used as callback function to initialise the - * CLKSEL register for every mmc channel. - */ +/* Configure CLKSEL register with chosen timing values */ static int exynos_dwmci_clksel(struct dwmci_host *host) { struct dwmci_exynos_priv_data *priv = exynos_dwmmc_get_priv(host); @@ -163,7 +160,7 @@ static u8 exynos_dwmmc_get_ciu_div(struct dwmci_host *host) & DWMCI_DIVRATIO_MASK) + 1; } -unsigned int exynos_dwmci_get_clk(struct dwmci_host *host, uint freq) +static unsigned int exynos_dwmci_get_clk(struct dwmci_host *host, uint freq) { unsigned long sclk; u8 clk_div; @@ -204,7 +201,6 @@ static void exynos_dwmci_board_init(struct dwmci_host *host) MPSCTRL_NON_SECURE_WRITE_BIT | MPSCTRL_VALID); } - /* Set to timing value at initial time */ if (priv->sdr_timing) exynos_dwmci_clksel(host); } @@ -214,8 +210,8 @@ static int exynos_dwmmc_of_to_plat(struct udevice *dev) { struct dwmci_exynos_priv_data *priv = dev_get_priv(dev); struct dwmci_host *host = &priv->host; - int err = 0; u32 div, timing[2]; + int err; priv->chip = (struct exynos_dwmmc_variant *)dev_get_driver_data(dev); @@ -223,9 +219,8 @@ static int exynos_dwmmc_of_to_plat(struct udevice *dev) const void *blob = gd->fdt_blob; int node = dev_of_offset(dev); - /* Extract device id for each mmc channel */ + /* Obtain device ID for current MMC channel */ host->dev_id = pinmux_decode_periph_id(blob, node); - host->dev_index = dev_read_u32_default(dev, "index", host->dev_id); if (host->dev_index == host->dev_id) host->dev_index = host->dev_id - PERIPH_ID_SDMMC0; @@ -241,10 +236,6 @@ static int exynos_dwmmc_of_to_plat(struct udevice *dev) host->dev_index = 2; /* SD card */ #endif - /* Get the bus width from the device node (Default is 4bit buswidth) */ - host->buswidth = dev_read_u32_default(dev, "bus-width", 4); - - /* Set the base address from the device node */ host->ioaddr = dev_read_addr_ptr(dev); if (!host->ioaddr) { printf("DWMMC%d: Can't get base address\n", host->dev_index); @@ -255,17 +246,17 @@ static int exynos_dwmmc_of_to_plat(struct udevice *dev) div = priv->chip->div; else div = dev_read_u32_default(dev, "samsung,dw-mshc-ciu-div", 0); + err = dev_read_u32_array(dev, "samsung,dw-mshc-sdr-timing", timing, 2); if (err) { printf("DWMMC%d: Can't get sdr-timings\n", host->dev_index); return -EINVAL; } - priv->sdr_timing = DWMCI_SET_SAMPLE_CLK(timing[0]) | DWMCI_SET_DRV_CLK(timing[1]) | DWMCI_SET_DIV_RATIO(div); - /* sdr_timing didn't assigned anything, use the default value */ + /* sdr_timing wasn't set, use the default value */ if (!priv->sdr_timing) { if (host->dev_index == 0) priv->sdr_timing = DWMMC_MMC0_SDR_TIMING_VAL; @@ -284,6 +275,7 @@ static int exynos_dwmmc_of_to_plat(struct udevice *dev) DWMCI_SET_DIV_RATIO(div); } + host->buswidth = dev_read_u32_default(dev, "bus-width", 4); host->fifo_depth = dev_read_u32_default(dev, "fifo-depth", 0); host->bus_hz = dev_read_u32_default(dev, "clock-frequency", 0); @@ -396,8 +388,8 @@ U_BOOT_DRIVER(exynos_dwmmc_drv) = { .of_match = exynos_dwmmc_ids, .of_to_plat = exynos_dwmmc_of_to_plat, .bind = exynos_dwmmc_bind, - .ops = &dm_dwmci_ops, .probe = exynos_dwmmc_probe, + .ops = &dm_dwmci_ops, .priv_auto = sizeof(struct dwmci_exynos_priv_data), .plat_auto = sizeof(struct exynos_mmc_plat), }; |