Hi,
On Wed, Jun 24, 2015 at 5:38 AM, Simon Glass sjg@chromium.org wrote:
Some SoCs want to adjust the input clock to the DWMMC block as a way of controlling the MMC bus clock. Update the get_mmc_clk() method to support this.
The subject line should probably reflect this is a DWMMC only patch? There are systems that have MMC and don't use the DWMMC controller.
ChenYu
Signed-off-by: Simon Glass sjg@chromium.org
Changes in v3: None Changes in v2: None
drivers/mmc/dw_mmc.c | 2 +- drivers/mmc/exynos_dw_mmc.c | 2 +- include/dwmmc.h | 16 +++++++++++++++- 3 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c index 8f28d7e..a034c3f 100644 --- a/drivers/mmc/dw_mmc.c +++ b/drivers/mmc/dw_mmc.c @@ -248,7 +248,7 @@ static int dwmci_setup_bus(struct dwmci_host *host, u32 freq) * host->bus_hz should be set by user. */ if (host->get_mmc_clk)
sclk = host->get_mmc_clk(host);
sclk = host->get_mmc_clk(host, freq); else if (host->bus_hz) sclk = host->bus_hz; else {diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c index e083745..3f702ba 100644 --- a/drivers/mmc/exynos_dw_mmc.c +++ b/drivers/mmc/exynos_dw_mmc.c @@ -39,7 +39,7 @@ static void exynos_dwmci_clksel(struct dwmci_host *host) dwmci_writel(host, DWMCI_CLKSEL, priv->sdr_timing); }
-unsigned int exynos_dwmci_get_clk(struct dwmci_host *host) +unsigned int exynos_dwmci_get_clk(struct dwmci_host *host, uint freq) { unsigned long sclk; int8_t clk_div; diff --git a/include/dwmmc.h b/include/dwmmc.h index 7a7555a..25cf42c 100644 --- a/include/dwmmc.h +++ b/include/dwmmc.h @@ -163,7 +163,21 @@ struct dwmci_host {
void (*clksel)(struct dwmci_host *host); void (*board_init)(struct dwmci_host *host);
unsigned int (*get_mmc_clk)(struct dwmci_host *host);
/*** Get / set a particular MMC clock frequency** This is used to request the current clock frequency of the clock* that drives the DWMMC peripheral. The caller will then use this* information to work out the divider it needs to achieve the* required MMC bus clock frequency. If you want to handle the* clock external to DWMMC, use @freq to select the frequency and* return that value too. Then DWMMC will put itself in bypass mode.** @host: DWMMC host* @freq: Frequency the host is trying to achieve*/unsigned int (*get_mmc_clk)(struct dwmci_host *host, uint freq); struct mmc_config cfg;};
2.4.3.573.g4eafbef
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