linux-kernel - [PATCH 1/5] SDHCI: Add a generic registration to the SDHCI platform driver

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Date:	Thu,  6 Mar 2014 14:52:24 +1100
From:	Alistair Popple <alistair@...ple.id.au>
To:	linux-mmc@...r.kernel.org, chris@...ntf.net
Cc:	Alistair Popple <alistair@...ple.id.au>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH 1/5] SDHCI: Add a generic registration to the SDHCI platform driver

This patch adds a generic platform driver registration to the exiting SDHCI
platform driver using the devicetree compatibility string "generic-sdhci".

Signed-off-by: Alistair Popple <alistair@...ple.id.au>
---
 .../devicetree/bindings/mmc/sdhci-pltfm.txt        | 16 +++++++++++++
 drivers/mmc/host/sdhci-pltfm.c                     | 28 ++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-pltfm.txt

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-pltfm.txt b/Documentation/devicetree/bindings/mmc/sdhci-pltfm.txt
new file mode 100644
index 0000000..3940659
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/sdhci-pltfm.txt
@@ -0,0 +1,16 @@
+Generic SHDCI platform driver
+
+The generic SDHCI platform driver should support most SDHCI host
+controllers. It uses the compatible="generic-sdhci" property and
+supports the following device tree properties as described in mmc.txt.
+
+Supported properties (described in mmc.txt):
+- reg
+- interrupts
+- wp-inverted
+- broken-cd
+- no-1-8-v
+- keep-power-in-suspend
+- enable-sdio-wakeup
+- bus-width
+- clock-frequency
diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index bef250e..696d1f6 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -260,6 +260,34 @@ const struct dev_pm_ops sdhci_pltfm_pmops = {
 EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
 #endif	/* CONFIG_PM */
 
+static int sdhci_generic_probe(struct platform_device *pdev)
+{
+	return sdhci_pltfm_register(pdev, NULL, 0);
+}
+
+static int sdhci_generic_remove(struct platform_device *pdev)
+{
+	return sdhci_pltfm_unregister(pdev);
+}
+
+static const struct of_device_id sdhci_generic_of_match[] = {
+	{ .compatible = "generic-sdhci" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, sdhci_generic_of_match);
+
+static struct platform_driver sdhci_generic_driver = {
+	.driver = {
+		.name = "sdhci-generic",
+		.owner = THIS_MODULE,
+		.of_match_table = sdhci_generic_of_match,
+		.pm = SDHCI_PLTFM_PMOPS,
+	},
+	.probe = sdhci_generic_probe,
+	.remove = sdhci_generic_remove,
+};
+module_platform_driver(sdhci_generic_driver);
+
 static int __init sdhci_pltfm_drv_init(void)
 {
 	pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
-- 
1.8.3.2

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