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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2012-06-20 19:10:32 +0200
committerChris Ball <cjb@laptop.org>2012-07-21 00:02:10 -0400
commit56c492879318f43b1a7911675ff30fb0ede123b5 (patch)
tree9721b287aaa6826d092d0a814f581a653430ac9b
parent8c102a964655b1a8df41b1f9e2355657471a45e3 (diff)
downloadblackbird-op-linux-56c492879318f43b1a7911675ff30fb0ede123b5.tar.gz
blackbird-op-linux-56c492879318f43b1a7911675ff30fb0ede123b5.zip
mmc: sdhi: implement tmio-mmc clock enable-update and disable callbacks
Instead of delivering one static clock frequency value, read from the hardware during probing, enable the tmio-mmc driver to re-read the frequency dynamically. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
-rw-r--r--drivers/mmc/host/sh_mobile_sdhi.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 934b68e9efc3..d8b167c8493a 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -39,6 +39,27 @@ struct sh_mobile_sdhi {
struct tmio_mmc_dma dma_priv;
};
+static int sh_mobile_sdhi_clk_enable(struct platform_device *pdev, unsigned int *f)
+{
+ struct mmc_host *mmc = dev_get_drvdata(&pdev->dev);
+ struct tmio_mmc_host *host = mmc_priv(mmc);
+ struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
+ int ret = clk_enable(priv->clk);
+ if (ret < 0)
+ return ret;
+
+ *f = clk_get_rate(priv->clk);
+ return 0;
+}
+
+static void sh_mobile_sdhi_clk_disable(struct platform_device *pdev)
+{
+ struct mmc_host *mmc = dev_get_drvdata(&pdev->dev);
+ struct tmio_mmc_host *host = mmc_priv(mmc);
+ struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
+ clk_disable(priv->clk);
+}
+
static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state)
{
struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
@@ -132,9 +153,10 @@ static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
goto eclkget;
}
- mmc_data->hclk = clk_get_rate(priv->clk);
mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
mmc_data->get_cd = sh_mobile_sdhi_get_cd;
+ mmc_data->clk_enable = sh_mobile_sdhi_clk_enable;
+ mmc_data->clk_disable = sh_mobile_sdhi_clk_disable;
mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
if (p) {
mmc_data->flags = p->tmio_flags;
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