sdhci-pltfm: implement platform data passing

This includes platform ops, quirks and (de)initialization callbacks.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Richard Röjfors <richard.rojfors@pelagicore.com>
Cc: David Vrabel <david.vrabel@csr.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Ben Dooks <ben@simtec.co.uk>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index 297f40a..217b911 100644 (file)
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -29,6 +29,7 @@
 #include <linux/mmc/host.h>
 
 #include <linux/io.h>
+#include <linux/sdhci-pltfm.h>
 
 #include "sdhci.h"
 
@@ -49,12 +50,11 @@ static struct sdhci_ops sdhci_pltfm_ops = {
 
 static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
 {
+       struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
        struct sdhci_host *host;
        struct resource *iomem;
        int ret;
 
-       BUG_ON(pdev == NULL);
-
        iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!iomem) {
                ret = -ENOMEM;
@@ -76,7 +76,12 @@ static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
        }
 
        host->hw_name = "platform";
-       host->ops = &sdhci_pltfm_ops;
+       if (pdata && pdata->ops)
+               host->ops = pdata->ops;
+       else
+               host->ops = &sdhci_pltfm_ops;
+       if (pdata)
+               host->quirks = pdata->quirks;
        host->irq = platform_get_irq(pdev, 0);
 
        if (!request_mem_region(iomem->start, resource_size(iomem),
@@ -93,6 +98,12 @@ static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
                goto err_remap;
        }
 
+       if (pdata && pdata->init) {
+               ret = pdata->init(host);
+               if (ret)
+                       goto err_plat_init;
+       }
+
        ret = sdhci_add_host(host);
        if (ret)
                goto err_add_host;
@@ -102,6 +113,9 @@ static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
        return 0;
 
 err_add_host:
+       if (pdata && pdata->exit)
+               pdata->exit(host);
+err_plat_init:
        iounmap(host->ioaddr);
 err_remap:
        release_mem_region(iomem->start, resource_size(iomem));
@@ -114,6 +128,7 @@ err:
 
 static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
 {
+       struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
        struct sdhci_host *host = platform_get_drvdata(pdev);
        struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        int dead;
@@ -125,6 +140,8 @@ static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
                dead = 1;
 
        sdhci_remove_host(host, dead);
+       if (pdata && pdata->exit)
+               pdata->exit(host);
        iounmap(host->ioaddr);
        release_mem_region(iomem->start, resource_size(iomem));
        sdhci_free_host(host);
@@ -165,4 +182,3 @@ MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:sdhci");
-

diff --git a/include/linux/sdhci-pltfm.h b/include/linux/sdhci-pltfm.h
new file mode 100644 (file)
index 0000000..0239bd7
--- /dev/null
+++ b/include/linux/sdhci-pltfm.h
@@ -0,0 +1,35 @@
+/*
+ * Platform data declarations for the sdhci-pltfm driver.
+ *
+ * Copyright (c) 2010 MontaVista Software, LLC.
+ *
+ * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * 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 _SDHCI_PLTFM_H
+#define _SDHCI_PLTFM_H
+
+struct sdhci_ops;
+struct sdhci_host;
+
+/**
+ * struct sdhci_pltfm_data - SDHCI platform-specific information & hooks
+ * @ops: optional pointer to the platform-provided SDHCI ops
+ * @quirks: optional SDHCI quirks
+ * @init: optional hook that is called during device probe, before the
+ *        driver tries to access any SDHCI registers
+ * @exit: optional hook that is called during device removal
+ */
+struct sdhci_pltfm_data {
+       struct sdhci_ops *ops;
+       unsigned int quirks;
+       int (*init)(struct sdhci_host *host);
+       void (*exit)(struct sdhci_host *host);
+};
+
+#endif /* _SDHCI_PLTFM_H */