0
0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-22 02:24:57 +08:00
linux/drivers/mmc/host/sdhci-xenon.c
Zhoujie Wu 8d876bf472 mmc: sdhci-xenon: wait 5ms after set 1.8V signal enable
According to SD spec 3.00 3.6.1 signal voltage switch
procedure step 6~8,
(6) Set 1.8V Signal Enable in the Host Control 2 register.
(7) Wait 5ms. 1.8V voltage regulator shall be stable within this period.
(8) If 1.8V Signal Enable is cleared by Host Controller, go to step (12).
Host should wait 5ms after set 1.8V signal enable bit in
Host Control 2 register and check if 1.8V is stable or not.

But current code checks this bit right after set it.
On some platforms with xenon controller found the bit is
cleared right away and host reports "1.8V regulator output
did not became stable" and 5ms delay can help.

Implement voltage_switch callback for xenon controller to add 5ms
delay to make sure the 1.8V signal enable bit is set by controller.

Signed-off-by: Zhoujie Wu <zjwu@marvell.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-12-19 08:53:04 +01:00

681 lines
18 KiB
C

/*
* Driver for Marvell Xenon SDHC as a platform device
*
* Copyright (C) 2016 Marvell, All Rights Reserved.
*
* Author: Hu Ziji <huziji@marvell.com>
* Date: 2016-8-24
*
* 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 version 2.
*
* Inspired by Jisheng Zhang <jszhang@marvell.com>
* Special thanks to Video BG4 project team.
*/
#include <linux/delay.h>
#include <linux/ktime.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include "sdhci-pltfm.h"
#include "sdhci-xenon.h"
static int xenon_enable_internal_clk(struct sdhci_host *host)
{
u32 reg;
ktime_t timeout;
reg = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
reg |= SDHCI_CLOCK_INT_EN;
sdhci_writel(host, reg, SDHCI_CLOCK_CONTROL);
/* Wait max 20 ms */
timeout = ktime_add_ms(ktime_get(), 20);
while (!((reg = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
& SDHCI_CLOCK_INT_STABLE)) {
if (ktime_after(ktime_get(), timeout)) {
dev_err(mmc_dev(host->mmc), "Internal clock never stabilised.\n");
return -ETIMEDOUT;
}
usleep_range(900, 1100);
}
return 0;
}
/* Set SDCLK-off-while-idle */
static void xenon_set_sdclk_off_idle(struct sdhci_host *host,
unsigned char sdhc_id, bool enable)
{
u32 reg;
u32 mask;
reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
/* Get the bit shift basing on the SDHC index */
mask = (0x1 << (XENON_SDCLK_IDLEOFF_ENABLE_SHIFT + sdhc_id));
if (enable)
reg |= mask;
else
reg &= ~mask;
sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
}
/* Enable/Disable the Auto Clock Gating function */
static void xenon_set_acg(struct sdhci_host *host, bool enable)
{
u32 reg;
reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
if (enable)
reg &= ~XENON_AUTO_CLKGATE_DISABLE_MASK;
else
reg |= XENON_AUTO_CLKGATE_DISABLE_MASK;
sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
}
/* Enable this SDHC */
static void xenon_enable_sdhc(struct sdhci_host *host,
unsigned char sdhc_id)
{
u32 reg;
reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
reg |= (BIT(sdhc_id) << XENON_SLOT_ENABLE_SHIFT);
sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
/*
* Force to clear BUS_TEST to
* skip bus_test_pre and bus_test_post
*/
host->mmc->caps &= ~MMC_CAP_BUS_WIDTH_TEST;
}
/* Disable this SDHC */
static void xenon_disable_sdhc(struct sdhci_host *host,
unsigned char sdhc_id)
{
u32 reg;
reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
reg &= ~(BIT(sdhc_id) << XENON_SLOT_ENABLE_SHIFT);
sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
}
/* Enable Parallel Transfer Mode */
static void xenon_enable_sdhc_parallel_tran(struct sdhci_host *host,
unsigned char sdhc_id)
{
u32 reg;
reg = sdhci_readl(host, XENON_SYS_EXT_OP_CTRL);
reg |= BIT(sdhc_id);
sdhci_writel(host, reg, XENON_SYS_EXT_OP_CTRL);
}
/* Mask command conflict error */
static void xenon_mask_cmd_conflict_err(struct sdhci_host *host)
{
u32 reg;
reg = sdhci_readl(host, XENON_SYS_EXT_OP_CTRL);
reg |= XENON_MASK_CMD_CONFLICT_ERR;
sdhci_writel(host, reg, XENON_SYS_EXT_OP_CTRL);
}
static void xenon_retune_setup(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
u32 reg;
/* Disable the Re-Tuning Request functionality */
reg = sdhci_readl(host, XENON_SLOT_RETUNING_REQ_CTRL);
reg &= ~XENON_RETUNING_COMPATIBLE;
sdhci_writel(host, reg, XENON_SLOT_RETUNING_REQ_CTRL);
/* Disable the Re-tuning Interrupt */
reg = sdhci_readl(host, SDHCI_SIGNAL_ENABLE);
reg &= ~SDHCI_INT_RETUNE;
sdhci_writel(host, reg, SDHCI_SIGNAL_ENABLE);
reg = sdhci_readl(host, SDHCI_INT_ENABLE);
reg &= ~SDHCI_INT_RETUNE;
sdhci_writel(host, reg, SDHCI_INT_ENABLE);
/* Force to use Tuning Mode 1 */
host->tuning_mode = SDHCI_TUNING_MODE_1;
/* Set re-tuning period */
host->tuning_count = 1 << (priv->tuning_count - 1);
}
/*
* Operations inside struct sdhci_ops
*/
/* Recover the Register Setting cleared during SOFTWARE_RESET_ALL */
static void xenon_reset_exit(struct sdhci_host *host,
unsigned char sdhc_id, u8 mask)
{
/* Only SOFTWARE RESET ALL will clear the register setting */
if (!(mask & SDHCI_RESET_ALL))
return;
/* Disable tuning request and auto-retuning again */
xenon_retune_setup(host);
xenon_set_acg(host, true);
xenon_set_sdclk_off_idle(host, sdhc_id, false);
xenon_mask_cmd_conflict_err(host);
}
static void xenon_reset(struct sdhci_host *host, u8 mask)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
sdhci_reset(host, mask);
xenon_reset_exit(host, priv->sdhc_id, mask);
}
/*
* Xenon defines different values for HS200 and HS400
* in Host_Control_2
*/
static void xenon_set_uhs_signaling(struct sdhci_host *host,
unsigned int timing)
{
u16 ctrl_2;
ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
/* Select Bus Speed Mode for host */
ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
if (timing == MMC_TIMING_MMC_HS200)
ctrl_2 |= XENON_CTRL_HS200;
else if (timing == MMC_TIMING_UHS_SDR104)
ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
else if (timing == MMC_TIMING_UHS_SDR12)
ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
else if (timing == MMC_TIMING_UHS_SDR25)
ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
else if (timing == MMC_TIMING_UHS_SDR50)
ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
else if ((timing == MMC_TIMING_UHS_DDR50) ||
(timing == MMC_TIMING_MMC_DDR52))
ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
else if (timing == MMC_TIMING_MMC_HS400)
ctrl_2 |= XENON_CTRL_HS400;
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
}
static void xenon_set_power(struct sdhci_host *host, unsigned char mode,
unsigned short vdd)
{
struct mmc_host *mmc = host->mmc;
u8 pwr = host->pwr;
sdhci_set_power_noreg(host, mode, vdd);
if (host->pwr == pwr)
return;
if (host->pwr == 0)
vdd = 0;
if (!IS_ERR(mmc->supply.vmmc))
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
}
static void xenon_voltage_switch(struct sdhci_host *host)
{
/* Wait for 5ms after set 1.8V signal enable bit */
usleep_range(5000, 5500);
}
static const struct sdhci_ops sdhci_xenon_ops = {
.voltage_switch = xenon_voltage_switch,
.set_clock = sdhci_set_clock,
.set_power = xenon_set_power,
.set_bus_width = sdhci_set_bus_width,
.reset = xenon_reset,
.set_uhs_signaling = xenon_set_uhs_signaling,
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
};
static const struct sdhci_pltfm_data sdhci_xenon_pdata = {
.ops = &sdhci_xenon_ops,
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
};
/*
* Xenon Specific Operations in mmc_host_ops
*/
static void xenon_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct sdhci_host *host = mmc_priv(mmc);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
u32 reg;
/*
* HS400/HS200/eMMC HS doesn't have Preset Value register.
* However, sdhci_set_ios will read HS400/HS200 Preset register.
* Disable Preset Value register for HS400/HS200.
* eMMC HS with preset_enabled set will trigger a bug in
* get_preset_value().
*/
if ((ios->timing == MMC_TIMING_MMC_HS400) ||
(ios->timing == MMC_TIMING_MMC_HS200) ||
(ios->timing == MMC_TIMING_MMC_HS)) {
host->preset_enabled = false;
host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
host->flags &= ~SDHCI_PV_ENABLED;
reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
reg &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
} else {
host->quirks2 &= ~SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
}
sdhci_set_ios(mmc, ios);
xenon_phy_adj(host, ios);
if (host->clock > XENON_DEFAULT_SDCLK_FREQ)
xenon_set_sdclk_off_idle(host, priv->sdhc_id, true);
}
static int xenon_start_signal_voltage_switch(struct mmc_host *mmc,
struct mmc_ios *ios)
{
struct sdhci_host *host = mmc_priv(mmc);
/*
* Before SD/SDIO set signal voltage, SD bus clock should be
* disabled. However, sdhci_set_clock will also disable the Internal
* clock in mmc_set_signal_voltage().
* If Internal clock is disabled, the 3.3V/1.8V bit can not be updated.
* Thus here manually enable internal clock.
*
* After switch completes, it is unnecessary to disable internal clock,
* since keeping internal clock active obeys SD spec.
*/
xenon_enable_internal_clk(host);
xenon_soc_pad_ctrl(host, ios->signal_voltage);
/*
* If Vqmmc is fixed on platform, vqmmc regulator should be unavailable.
* Thus SDHCI_CTRL_VDD_180 bit might not work then.
* Skip the standard voltage switch to avoid any issue.
*/
if (PTR_ERR(mmc->supply.vqmmc) == -ENODEV)
return 0;
return sdhci_start_signal_voltage_switch(mmc, ios);
}
/*
* Update card type.
* priv->init_card_type will be used in PHY timing adjustment.
*/
static void xenon_init_card(struct mmc_host *mmc, struct mmc_card *card)
{
struct sdhci_host *host = mmc_priv(mmc);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
/* Update card type*/
priv->init_card_type = card->type;
}
static int xenon_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
struct sdhci_host *host = mmc_priv(mmc);
if (host->timing == MMC_TIMING_UHS_DDR50 ||
host->timing == MMC_TIMING_MMC_DDR52)
return 0;
/*
* Currently force Xenon driver back to support mode 1 only,
* even though Xenon might claim to support mode 2 or mode 3.
* It requires more time to test mode 2/mode 3 on more platforms.
*/
if (host->tuning_mode != SDHCI_TUNING_MODE_1)
xenon_retune_setup(host);
return sdhci_execute_tuning(mmc, opcode);
}
static void xenon_enable_sdio_irq(struct mmc_host *mmc, int enable)
{
struct sdhci_host *host = mmc_priv(mmc);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
u32 reg;
u8 sdhc_id = priv->sdhc_id;
sdhci_enable_sdio_irq(mmc, enable);
if (enable) {
/*
* Set SDIO Card Inserted indication
* to enable detecting SDIO async irq.
*/
reg = sdhci_readl(host, XENON_SYS_CFG_INFO);
reg |= (1 << (sdhc_id + XENON_SLOT_TYPE_SDIO_SHIFT));
sdhci_writel(host, reg, XENON_SYS_CFG_INFO);
} else {
/* Clear SDIO Card Inserted indication */
reg = sdhci_readl(host, XENON_SYS_CFG_INFO);
reg &= ~(1 << (sdhc_id + XENON_SLOT_TYPE_SDIO_SHIFT));
sdhci_writel(host, reg, XENON_SYS_CFG_INFO);
}
}
static void xenon_replace_mmc_host_ops(struct sdhci_host *host)
{
host->mmc_host_ops.set_ios = xenon_set_ios;
host->mmc_host_ops.start_signal_voltage_switch =
xenon_start_signal_voltage_switch;
host->mmc_host_ops.init_card = xenon_init_card;
host->mmc_host_ops.execute_tuning = xenon_execute_tuning;
host->mmc_host_ops.enable_sdio_irq = xenon_enable_sdio_irq;
}
/*
* Parse Xenon specific DT properties:
* sdhc-id: the index of current SDHC.
* Refer to XENON_SYS_CFG_INFO register
* tun-count: the interval between re-tuning
*/
static int xenon_probe_dt(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct sdhci_host *host = platform_get_drvdata(pdev);
struct mmc_host *mmc = host->mmc;
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
u32 sdhc_id, nr_sdhc;
u32 tuning_count;
/* Disable HS200 on Armada AP806 */
if (of_device_is_compatible(np, "marvell,armada-ap806-sdhci"))
host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
sdhc_id = 0x0;
if (!of_property_read_u32(np, "marvell,xenon-sdhc-id", &sdhc_id)) {
nr_sdhc = sdhci_readl(host, XENON_SYS_CFG_INFO);
nr_sdhc &= XENON_NR_SUPPORTED_SLOT_MASK;
if (unlikely(sdhc_id > nr_sdhc)) {
dev_err(mmc_dev(mmc), "SDHC Index %d exceeds Number of SDHCs %d\n",
sdhc_id, nr_sdhc);
return -EINVAL;
}
}
priv->sdhc_id = sdhc_id;
tuning_count = XENON_DEF_TUNING_COUNT;
if (!of_property_read_u32(np, "marvell,xenon-tun-count",
&tuning_count)) {
if (unlikely(tuning_count >= XENON_TMR_RETUN_NO_PRESENT)) {
dev_err(mmc_dev(mmc), "Wrong Re-tuning Count. Set default value %d\n",
XENON_DEF_TUNING_COUNT);
tuning_count = XENON_DEF_TUNING_COUNT;
}
}
priv->tuning_count = tuning_count;
return xenon_phy_parse_dt(np, host);
}
static int xenon_sdhc_prepare(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
u8 sdhc_id = priv->sdhc_id;
/* Enable SDHC */
xenon_enable_sdhc(host, sdhc_id);
/* Enable ACG */
xenon_set_acg(host, true);
/* Enable Parallel Transfer Mode */
xenon_enable_sdhc_parallel_tran(host, sdhc_id);
/* Disable SDCLK-Off-While-Idle before card init */
xenon_set_sdclk_off_idle(host, sdhc_id, false);
xenon_mask_cmd_conflict_err(host);
return 0;
}
static void xenon_sdhc_unprepare(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
u8 sdhc_id = priv->sdhc_id;
/* disable SDHC */
xenon_disable_sdhc(host, sdhc_id);
}
static int xenon_probe(struct platform_device *pdev)
{
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_host *host;
struct xenon_priv *priv;
int err;
host = sdhci_pltfm_init(pdev, &sdhci_xenon_pdata,
sizeof(struct xenon_priv));
if (IS_ERR(host))
return PTR_ERR(host);
pltfm_host = sdhci_priv(host);
priv = sdhci_pltfm_priv(pltfm_host);
/*
* Link Xenon specific mmc_host_ops function,
* to replace standard ones in sdhci_ops.
*/
xenon_replace_mmc_host_ops(host);
pltfm_host->clk = devm_clk_get(&pdev->dev, "core");
if (IS_ERR(pltfm_host->clk)) {
err = PTR_ERR(pltfm_host->clk);
dev_err(&pdev->dev, "Failed to setup input clk: %d\n", err);
goto free_pltfm;
}
err = clk_prepare_enable(pltfm_host->clk);
if (err)
goto free_pltfm;
priv->axi_clk = devm_clk_get(&pdev->dev, "axi");
if (IS_ERR(priv->axi_clk)) {
err = PTR_ERR(priv->axi_clk);
if (err == -EPROBE_DEFER)
goto err_clk;
} else {
err = clk_prepare_enable(priv->axi_clk);
if (err)
goto err_clk;
}
err = mmc_of_parse(host->mmc);
if (err)
goto err_clk_axi;
sdhci_get_of_property(pdev);
xenon_set_acg(host, false);
/* Xenon specific dt parse */
err = xenon_probe_dt(pdev);
if (err)
goto err_clk_axi;
err = xenon_sdhc_prepare(host);
if (err)
goto err_clk_axi;
pm_runtime_get_noresume(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_suspend_ignore_children(&pdev->dev, 1);
err = sdhci_add_host(host);
if (err)
goto remove_sdhc;
pm_runtime_put_autosuspend(&pdev->dev);
return 0;
remove_sdhc:
pm_runtime_disable(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);
xenon_sdhc_unprepare(host);
err_clk_axi:
clk_disable_unprepare(priv->axi_clk);
err_clk:
clk_disable_unprepare(pltfm_host->clk);
free_pltfm:
sdhci_pltfm_free(pdev);
return err;
}
static int xenon_remove(struct platform_device *pdev)
{
struct sdhci_host *host = platform_get_drvdata(pdev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
pm_runtime_get_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);
sdhci_remove_host(host, 0);
xenon_sdhc_unprepare(host);
clk_disable_unprepare(priv->axi_clk);
clk_disable_unprepare(pltfm_host->clk);
sdhci_pltfm_free(pdev);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int xenon_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
int ret;
ret = pm_runtime_force_suspend(dev);
priv->restore_needed = true;
return ret;
}
#endif
#ifdef CONFIG_PM
static int xenon_runtime_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
int ret;
ret = sdhci_runtime_suspend_host(host);
if (ret)
return ret;
if (host->tuning_mode != SDHCI_TUNING_MODE_3)
mmc_retune_needed(host->mmc);
clk_disable_unprepare(pltfm_host->clk);
/*
* Need to update the priv->clock here, or when runtime resume
* back, phy don't aware the clock change and won't adjust phy
* which will cause cmd err
*/
priv->clock = 0;
return 0;
}
static int xenon_runtime_resume(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
int ret;
ret = clk_prepare_enable(pltfm_host->clk);
if (ret) {
dev_err(dev, "can't enable mainck\n");
return ret;
}
if (priv->restore_needed) {
ret = xenon_sdhc_prepare(host);
if (ret)
goto out;
priv->restore_needed = false;
}
ret = sdhci_runtime_resume_host(host);
if (ret)
goto out;
return 0;
out:
clk_disable_unprepare(pltfm_host->clk);
return ret;
}
#endif /* CONFIG_PM */
static const struct dev_pm_ops sdhci_xenon_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(xenon_suspend,
pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(xenon_runtime_suspend,
xenon_runtime_resume,
NULL)
};
static const struct of_device_id sdhci_xenon_dt_ids[] = {
{ .compatible = "marvell,armada-ap806-sdhci",},
{ .compatible = "marvell,armada-cp110-sdhci",},
{ .compatible = "marvell,armada-3700-sdhci",},
{}
};
MODULE_DEVICE_TABLE(of, sdhci_xenon_dt_ids);
static struct platform_driver sdhci_xenon_driver = {
.driver = {
.name = "xenon-sdhci",
.of_match_table = sdhci_xenon_dt_ids,
.pm = &sdhci_xenon_dev_pm_ops,
},
.probe = xenon_probe,
.remove = xenon_remove,
};
module_platform_driver(sdhci_xenon_driver);
MODULE_DESCRIPTION("SDHCI platform driver for Marvell Xenon SDHC");
MODULE_AUTHOR("Hu Ziji <huziji@marvell.com>");
MODULE_LICENSE("GPL v2");