On Tue, Sep 08, 2009 at 03:51:26PM +0900, thomas.ab@xxxxxxxxxxx wrote:
> From: Thomas Abraham <thomas.ab@xxxxxxxxxxx>
>
> This patch sets the parent clock, source clock and sdhci module
> clock speed for 6410 sdhci controller.
The driver should really be presented with a correct list of sources
for mmc_bus in the platform data (ok, the last post was incorrect as
I forgot the mux on mmc_bus as well as the mux in the driver block).
Any static setup of mmc_bus can be done in the machine setup code,
otherwise please look at how the choices for the SDHCI mux is presented.
> Signed-off-by: Thomas Abraham <thomas.ab@xxxxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-s3c.c | 13 +++++++++++++
> 1 files changed, 13 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
> index 50997d2..db1bb93 100644
> --- a/drivers/mmc/host/sdhci-s3c.c
> +++ b/drivers/mmc/host/sdhci-s3c.c
> @@ -22,6 +22,8 @@
>
> #include <plat/sdhci.h>
> #include <plat/regs-sdhci.h>
> +#include <plat/clock.h>
> +#include <plat/cpu.h>
>
> #include "sdhci.h"
>
> @@ -221,6 +223,7 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
> struct sdhci_host *host;
> struct sdhci_s3c *sc;
> struct resource *res;
> + struct clk *clk_mmc, *clk_parent;
> int ret, irq, ptr, clks;
>
> if (!pdata) {
> @@ -240,6 +243,16 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
> return -ENOENT;
> }
>
> + /* Set the SDHCI controller clock rate */
> + clk_mmc = clk_get(dev, pdata->clk_source_name);
> + clk_parent = clk_get(dev, pdata->clk_parent_name);
> + if (!clk_mmc || !clk_parent) {
> + dev_err(dev, "could not obtain clock information");
> + return -ENXIO;
> + }
> + clk_set_parent(clk_mmc, clk_parent);
> + clk_set_rate(clk_mmc, pdata->clk_speed);
> +
> host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c));
> if (IS_ERR(host)) {
> dev_err(dev, "sdhci_alloc_host() failed\n");
> --
> 1.5.3.4
>
>
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--
--
Ben
Q: What's a light-year?
A: One-third less calories than a regular year.
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