A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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ARM: Orion: SDIO: Add support for clk.

Browse source 
Some orion devices can gate the SDIO clock. If the clock exists,
enable/disable it as appropriate.

Signed-off-by: Andrew Lunn <[email protected]>
Tested-by: Jamie Lentin <[email protected]>
Signed-off-by: Mike Turquette <[email protected]>
This commit is contained in:
Andrew Lunn 2012-02-19 11:39:27 +01:00 • committed by Mike Turquette
commit f4f7561e03
2 changed files with 17 additions and 2 deletions
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14
drivers/mmc/host/mvsdio.c
View file

@ -19,6 +19,7 @@
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <linux/irq.h>
#include <linux/clk.h>
#include <linux/gpio.h>
#include <linux/mmc/host.h>
@ -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);