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/*
* 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);
}
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");
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