linux-kernel - [PATCH 2/5] mmc: sdhci: make sdhci-cns3xxx driver self registered

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Message-Id: <1300694823-8300-3-git-send-email-shawn.guo@linaro.org>
Date:	Mon, 21 Mar 2011 16:07:00 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	devicetree-discuss@...ts.ozlabs.org, linux-mmc@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org,
	patches@...aro.org, sameo@...ux.intel.com,
	grant.likely@...retlab.ca, Shawn Guo <shawn.guo@...aro.org>
Subject: [PATCH 2/5] mmc: sdhci: make sdhci-cns3xxx driver self registered

The patch adds sdhci-cns3xxx its own .probe and .remove which in turn
call into the common functions provided by sdhci-pltfm.c, so that
sdhci-cns3xxx driver registers itself and keep all sdhci-cns3xxx
specific things like sdhci_cns3xxx_pdata away from sdhci-pltfm.c which
is common.

Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
---
 drivers/mmc/host/sdhci-cns3xxx.c |   68 +++++++++++++++++++++++++++++++++++++-
 drivers/mmc/host/sdhci-pltfm.c   |    3 --
 drivers/mmc/host/sdhci-pltfm.h   |    1 -
 3 files changed, 67 insertions(+), 5 deletions(-)

diff --git a/drivers/mmc/host/sdhci-cns3xxx.c b/drivers/mmc/host/sdhci-cns3xxx.c
index 9ebd1d7..97d19cd 100644
--- a/drivers/mmc/host/sdhci-cns3xxx.c
+++ b/drivers/mmc/host/sdhci-cns3xxx.c
@@ -86,7 +86,7 @@ static struct sdhci_ops sdhci_cns3xxx_ops = {
 	.set_clock	= sdhci_cns3xxx_set_clock,
 };
 
-struct sdhci_pltfm_data sdhci_cns3xxx_pdata = {
+static struct sdhci_pltfm_data sdhci_cns3xxx_pdata = {
 	.ops = &sdhci_cns3xxx_ops,
 	.quirks = SDHCI_QUIRK_BROKEN_DMA |
 		  SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
@@ -95,3 +95,69 @@ struct sdhci_pltfm_data sdhci_cns3xxx_pdata = {
 		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
 		  SDHCI_QUIRK_NONSTANDARD_CLOCK,
 };
+
+static int __devinit sdhci_cns3xxx_probe(struct platform_device *pdev)
+{
+	struct sdhci_host *host;
+	int ret;
+
+	host = sdhci_pltfm_init(pdev, &sdhci_cns3xxx_pdata);
+	if (!host)
+		return -ENOMEM;
+
+	ret = sdhci_add_host(host);
+	if (ret)
+		goto err_add_host;
+
+	return 0;
+
+err_add_host:
+	sdhci_pltfm_free(pdev);
+	return ret;
+}
+
+static int __devexit sdhci_cns3xxx_remove(struct platform_device *pdev)
+{
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+	int dead = 0;
+	u32 scratch;
+
+	scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
+	if (scratch == (u32)-1)
+		dead = 1;
+
+	sdhci_remove_host(pdev, dead);
+	sdhci_pltfm_free(pdev);
+
+	return 0;
+}
+
+static struct platform_driver sdhci_cns3xxx_driver = {
+	.driver		= {
+		.name	= "sdhci-cns3xxx",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= sdhci_cns3xxx_probe,
+	.remove		= __devexit_p(sdhci_cns3xxx_remove),
+#ifdef CONFIG_PM
+	.suspend	= sdhci_pltfm_suspend,
+	.resume		= sdhci_pltfm_resume,
+#endif
+};
+
+static int __init sdhci_cns3xxx_init(void)
+{
+	return platform_driver_register(&sdhci_cns3xxx_driver);
+}
+
+static void __exit sdhci_cns3xxx_exit(void)
+{
+	platform_driver_unregister(&sdhci_cns3xxx_driver);
+}
+
+module_init(sdhci_cns3xxx_init);
+module_exit(sdhci_cns3xxx_exit);
+
+MODULE_DESCRIPTION("SDHCI driver for CNS3xxx");
+MODULE_AUTHOR("Anton Vorontsov <avorontsov@...sta.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index 38b8cb4..b9a904d 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -272,9 +272,6 @@ static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
 
 static const struct platform_device_id sdhci_pltfm_ids[] = {
 	{ "sdhci", },
-#ifdef CONFIG_MMC_SDHCI_CNS3XXX
-	{ "sdhci-cns3xxx", (kernel_ulong_t)&sdhci_cns3xxx_pdata },
-#endif
 #ifdef CONFIG_MMC_SDHCI_DOVE
 	{ "sdhci-dove", (kernel_ulong_t)&sdhci_dove_pdata },
 #endif
diff --git a/drivers/mmc/host/sdhci-pltfm.h b/drivers/mmc/host/sdhci-pltfm.h
index 8357eba..493a8d0 100644
--- a/drivers/mmc/host/sdhci-pltfm.h
+++ b/drivers/mmc/host/sdhci-pltfm.h
@@ -21,7 +21,6 @@ struct sdhci_pltfm_host {
 	u32 scratchpad; /* to handle quirks across io-accessor calls */
 };
 
-extern struct sdhci_pltfm_data sdhci_cns3xxx_pdata;
 extern struct sdhci_pltfm_data sdhci_dove_pdata;
 extern struct sdhci_pltfm_data sdhci_tegra_pdata;
 extern struct sdhci_pltfm_data sdhci_tegra_dt_pdata;
-- 
1.7.1

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