mmc: dw_mmc: prepare functions in dw_mmc-pltfm for reuse

Platform implementations of dw-mshc controller may choose to extend the features of the standard dw-mshc controller such as adding additional clocking options or modifying the bus interface. Support for such implementation specific extensions can be incorporated into dw_mmc-pltfm, but including multiple such platform specific implementations would convolute the existing dw_mmc-pltfm code. Instead, it would be better to create implementation specific platform drivers to support implementation specific features. Such platforms drivers can reuse the existing infrastructure in dw_mmc-pltfm for resource identification and controller registration and provide support for implementation specific features. So, allow the infrastructure in dw_mmc-pltfm to be reused by other implementation specific platform drivers. Signed-off-by: Thomas Abraham <[email protected]> Acked-by: Will Newton <[email protected]> Signed-off-by: Chris Ball <[email protected]>
chewitt · Oct 3, 2012 · 17403f2 · 17403f2
1 parent c91eab4
commit 17403f2
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Showing 2 changed files with 29 additions and 2 deletions.
diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
@@ -23,7 +23,7 @@
 
 #include "dw_mmc.h"
 
-static int __devinit dw_mci_pltfm_probe(struct platform_device *pdev)
+int dw_mci_pltfm_register(struct platform_device *pdev)
 {
 	struct dw_mci *host;
 	struct resource	*regs;
@@ -52,6 +52,12 @@ static int __devinit dw_mci_pltfm_probe(struct platform_device *pdev)
 	ret = dw_mci_probe(host);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
+
+static int __devinit dw_mci_pltfm_probe(struct platform_device *pdev)
+{
+	return dw_mci_pltfm_register(pdev);
+}
 
 static int __devexit dw_mci_pltfm_remove(struct platform_device *pdev)
 {
@@ -61,6 +67,7 @@ static int __devexit dw_mci_pltfm_remove(struct platform_device *pdev)
 	dw_mci_remove(host);
 	return 0;
 }
+EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
 
 #ifdef CONFIG_PM_SLEEP
 /*
@@ -94,7 +101,8 @@ static int dw_mci_pltfm_resume(struct device *dev)
 #define dw_mci_pltfm_resume	NULL
 #endif /* CONFIG_PM_SLEEP */
 
-static SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
+SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
+EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
 
 static const struct of_device_id dw_mci_pltfm_match[] = {
 	{ .compatible = "snps,dw-mshc", },

diff --git a/drivers/mmc/host/dw_mmc-pltfm.h b/drivers/mmc/host/dw_mmc-pltfm.h
@@ -0,0 +1,19 @@
+/*
+ * Synopsys DesignWare Multimedia Card Interface Platform driver
+ *
+ * Copyright (C) 2012, Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _DW_MMC_PLTFM_H_
+#define _DW_MMC_PLTFM_H_
+
+extern int dw_mci_pltfm_register(struct platform_device *pdev);
+extern int __devexit dw_mci_pltfm_remove(struct platform_device *pdev);
+extern const struct dev_pm_ops dw_mci_pltfm_pmops;
+
+#endif /* _DW_MMC_PLTFM_H_ */