1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
new file mode 100644
index 00000000000..68e5e428e8f
--- /dev/null
+++ b/drivers/mmc/host/dw_mmc-k3.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2013 Linaro Ltd.
+ * Copyright (c) 2013 Hisilicon Limited.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/dw_mmc.h>
+#include <linux/of_address.h>
+
+#include "dw_mmc.h"
+#include "dw_mmc-pltfm.h"
+
+#define MAX_NUMS	10
+struct dw_mci_k3_priv_data {
+	u32	clk_table[MAX_NUMS];
+};
+
+static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
+{
+	struct dw_mci_k3_priv_data *priv = host->priv;
+	u32 rate = priv->clk_table[ios->timing];
+	int ret;
+
+	if (!rate) {
+		dev_warn(host->dev,
+			"no specified rate in timing %u\n", ios->timing);
+		return;
+	}
+
+	ret = clk_set_rate(host->ciu_clk, rate);
+	if (ret)
+		dev_warn(host->dev, "failed to set clock rate %uHz\n", rate);
+
+	host->bus_hz = clk_get_rate(host->ciu_clk);
+}
+
+static int dw_mci_k3_parse_dt(struct dw_mci *host)
+{
+	struct dw_mci_k3_priv_data *priv;
+	struct device_node *node = host->dev->of_node;
+	struct property *prop;
+	const __be32 *cur;
+	u32 val, num = 0;
+
+	priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		dev_err(host->dev, "mem alloc failed for private data\n");
+		return -ENOMEM;
+	}
+	host->priv = priv;
+
+	of_property_for_each_u32(node, "clock-freq-table", prop, cur, val) {
+		if (num >= MAX_NUMS)
+			break;
+		priv->clk_table[num++] = val;
+	}
+	return 0;
+}
+
+static const struct dw_mci_drv_data k3_drv_data = {
+	.set_ios		= dw_mci_k3_set_ios,
+	.parse_dt		= dw_mci_k3_parse_dt,
+};
+
+static const struct of_device_id dw_mci_k3_match[] = {
+	{ .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, },
+	{},
+};
+MODULE_DEVICE_TABLE(of, dw_mci_k3_match);
+
+static int dw_mci_k3_probe(struct platform_device *pdev)
+{
+	const struct dw_mci_drv_data *drv_data;
+	const struct of_device_id *match;
+
+	match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
+	drv_data = match->data;
+
+	return dw_mci_pltfm_register(pdev, drv_data);
+}
+
+static int dw_mci_k3_suspend(struct device *dev)
+{
+	struct dw_mci *host = dev_get_drvdata(dev);
+	int ret;
+
+	ret = dw_mci_suspend(host);
+	if (!ret)
+		clk_disable_unprepare(host->ciu_clk);
+
+	return ret;
+}
+
+static int dw_mci_k3_resume(struct device *dev)
+{
+	struct dw_mci *host = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(host->ciu_clk);
+	if (ret) {
+		dev_err(host->dev, "failed to enable ciu clock\n");
+		return ret;
+	}
+
+	return dw_mci_resume(host);
+}
+
+SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume);
+
+static struct platform_driver dw_mci_k3_pltfm_driver = {
+	.probe		= dw_mci_k3_probe,
+	.remove		= dw_mci_pltfm_remove,
+	.driver		= {
+		.name		= "dwmmc_k3",
+		.of_match_table	= dw_mci_k3_match,
+		.pm		= &dw_mci_k3_pmops,
+	},
+};
+
+module_platform_driver(dw_mci_k3_pltfm_driver);
+
+MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:dwmmc-k3");