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

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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 <thomas.abraham@linaro.org>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Thomas Abraham 2012-09-17 18:16:41 +00:00 committed by Chris Ball
parent c91eab4b25
commit 17403f235e
2 changed files with 29 additions and 2 deletions
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12
drivers/mmc/host/dw_mmc-pltfm.c
View File

@ -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", },

19
drivers/mmc/host/dw_mmc-pltfm.h Normal file
View File

@ -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_ */