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mmc: sdhi: implement tmio-mmc clock enable-update and disable callbacks

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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>
This commit is contained in:
Guennadi Liakhovetski 2012-06-20 19:10:32 +02:00 committed by Chris Ball
parent 8c102a9646
commit 56c4928793
1 changed files with 23 additions and 1 deletions
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24
drivers/mmc/host/sh_mobile_sdhi.c
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@ -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;