Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mmc / host / dw_mmc-k3.c

diff --git a/kernel/drivers/mmc/host/dw_mmc-k3.c b/kernel/drivers/mmc/host/dw_mmc-k3.c
new file mode 100644 (file)
index 0000000..650f9cc
--- /dev/null
+++ b/kernel/drivers/mmc/host/dw_mmc-k3.c
@@ -0,0 +1,97 @@
+/*
+ * 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"
+
+static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
+{
+       int ret;
+
+       ret = clk_set_rate(host->ciu_clk, ios->clock);
+       if (ret)
+               dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock);
+
+       host->bus_hz = clk_get_rate(host->ciu_clk);
+}
+
+static const struct dw_mci_drv_data k3_drv_data = {
+       .set_ios                = dw_mci_k3_set_ios,
+};
+
+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);
+}
+
+#ifdef CONFIG_PM_SLEEP
+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);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static 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");