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authorSebastian Hesselbarth <sebastian.hesselbarth@googlemail.com>2012-07-05 12:14:01 +0200
committerChris Ball <cjb@laptop.org>2012-07-22 16:42:48 -0400
commit30b87c60e9cbfcdfce22aa652fc1e5d061fcb733 (patch)
treecfecead12bf49e8db4718a969a143320d773ee4d /drivers/mmc/host
parenta9ca1d5477a89c1833214a01463190f7bd77d8a9 (diff)
downloadlinux-linaro-stable-30b87c60e9cbfcdfce22aa652fc1e5d061fcb733.tar.gz
mmc: sdhci-dove: Prepare for common clock framework
As mach-dove is moving towards common clock framework prepare the sdhci driver to grab its clock. Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@googlemail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host')
-rw-r--r--drivers/mmc/host/sdhci-dove.c48
1 files changed, 47 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-dove.c b/drivers/mmc/host/sdhci-dove.c
index 9c8536881796..a6e53a1ebb08 100644
--- a/drivers/mmc/host/sdhci-dove.c
+++ b/drivers/mmc/host/sdhci-dove.c
@@ -20,11 +20,17 @@
*/
#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/module.h>
#include <linux/mmc/host.h>
#include "sdhci-pltfm.h"
+struct sdhci_dove_priv {
+ struct clk *clk;
+};
+
static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
{
u16 ret;
@@ -72,11 +78,51 @@ static struct sdhci_pltfm_data sdhci_dove_pdata = {
static int __devinit sdhci_dove_probe(struct platform_device *pdev)
{
- return sdhci_pltfm_register(pdev, &sdhci_dove_pdata);
+ struct sdhci_host *host;
+ struct sdhci_pltfm_host *pltfm_host;
+ struct sdhci_dove_priv *priv;
+ int ret;
+
+ ret = sdhci_pltfm_register(pdev, &sdhci_dove_pdata);
+ if (ret)
+ goto sdhci_dove_register_fail;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_dove_priv),
+ GFP_KERNEL);
+ if (!priv) {
+ dev_err(&pdev->dev, "unable to allocate private data");
+ ret = -ENOMEM;
+ goto sdhci_dove_allocate_fail;
+ }
+
+ host = platform_get_drvdata(pdev);
+ pltfm_host = sdhci_priv(host);
+ pltfm_host->priv = priv;
+
+ priv->clk = clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(priv->clk))
+ clk_prepare_enable(priv->clk);
+ return 0;
+
+sdhci_dove_allocate_fail:
+ sdhci_pltfm_unregister(pdev);
+sdhci_dove_register_fail:
+ return ret;
}
static int __devexit sdhci_dove_remove(struct platform_device *pdev)
{
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_dove_priv *priv = pltfm_host->priv;
+
+ if (priv->clk) {
+ if (!IS_ERR(priv->clk)) {
+ clk_disable_unprepare(priv->clk);
+ clk_put(priv->clk);
+ }
+ devm_kfree(&pdev->dev, priv->clk);
+ }
return sdhci_pltfm_unregister(pdev);
}