arm: socfpga: mmc: Pick the clock from clock manager

Make the SoCFPGA MMC stub pick clock via the clock manager
frequency accessors instead of hard-coding the frequency.

Also fix calloc() misuse.

Signed-off-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Tom Rini <trini@ti.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Pavel Machek <pavel@denx.de>
Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>

diff --git a/drivers/mmc/socfpga_dw_mmc.c b/drivers/mmc/socfpga_dw_mmc.c
index 1f96382..eb69aed 100644 (file)
--- a/drivers/mmc/socfpga_dw_mmc.c
+++ b/drivers/mmc/socfpga_dw_mmc.c
@@ -7,6 +7,7 @@
 #include <common.h>
 #include <malloc.h>
 #include <dwmmc.h>
+#include <errno.h>
 #include <asm/arch/dwmmc.h>
 #include <asm/arch/clock_manager.h>
 #include <asm/arch/system_manager.h>
@@ -44,12 +45,18 @@ static void socfpga_dwmci_clksel(struct dwmci_host *host)
 int socfpga_dwmmc_init(u32 regbase, int bus_width, int index)
 {
        struct dwmci_host *host;
+       unsigned long clk = cm_get_mmc_controller_clk_hz();
+
+       if (clk == 0) {
+               printf("%s: MMC clock is zero!", __func__);
+               return -EINVAL;
+       }
 
        /* calloc for zero init */
-       host = calloc(sizeof(struct dwmci_host), 1);
+       host = calloc(1, sizeof(struct dwmci_host));
        if (!host) {
-               printf("dwmci_host calloc fail!\n");
-               return -1;
+               printf("%s: calloc() failed!\n", __func__);
+               return -ENOMEM;
        }
 
        host->name = "SOCFPGA DWMMC";
@@ -58,7 +65,7 @@ int socfpga_dwmmc_init(u32 regbase, int bus_width, int index)
        host->clksel = socfpga_dwmci_clksel;
        host->dev_index = index;
        /* fixed clock divide by 4 which due to the SDMMC wrapper */
-       host->bus_hz = CONFIG_SOCFPGA_DWMMC_BUS_HZ;
+       host->bus_hz = clk;
        host->fifoth_val = MSIZE(0x2) |
                RX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2 - 1) |
                TX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2);