From f4f7561e032777cd7376800ac97352d5b1684d8f Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Sun, 19 Feb 2012 11:39:27 +0100 Subject: ARM: Orion: SDIO: Add support for clk. Some orion devices can gate the SDIO clock. If the clock exists, enable/disable it as appropriate. Signed-off-by: Andrew Lunn Tested-by: Jamie Lentin Signed-off-by: Mike Turquette --- drivers/mmc/host/mvsdio.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'drivers/mmc') diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c index eeb8cd125b0c..3b9136c1a475 100644 --- a/drivers/mmc/host/mvsdio.c +++ b/drivers/mmc/host/mvsdio.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -51,6 +52,7 @@ struct mvsd_host { struct device *dev; struct resource *res; int irq; + struct clk *clk; int gpio_card_detect; int gpio_write_protect; }; @@ -770,6 +772,13 @@ static int __init mvsd_probe(struct platform_device *pdev) } else host->irq = irq; + /* Not all platforms can gate the clock, so it is not + an error if the clock does not exists. */ + host->clk = clk_get(&pdev->dev, NULL); + if (!IS_ERR(host->clk)) { + clk_prepare_enable(host->clk); + } + if (mvsd_data->gpio_card_detect) { ret = gpio_request(mvsd_data->gpio_card_detect, DRIVER_NAME " cd"); @@ -854,6 +863,11 @@ static int __exit mvsd_remove(struct platform_device *pdev) mvsd_power_down(host); iounmap(host->base); release_resource(host->res); + + if (!IS_ERR(host->clk)) { + clk_disable_unprepare(host->clk); + clk_put(host->clk); + } mmc_free_host(mmc); } platform_set_drvdata(pdev, NULL); -- cgit v1.2.3