On 18/07/18 10:24, Chunyan Zhang wrote:
> On 17 July 2018 at 19:52, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote:
>> On 09/07/18 06:19, Chunyan Zhang wrote:
>>> From: Chunyan Zhang <chunyan.zhang@xxxxxxxxxxxxxx>
>>>
>>> This patch adds the initial support of Secure Digital Host Controller
>>> Interface compliant controller found in some latest Spreadtrum chipsets.
>>> This patch has been tested on the version of SPRD-R11 controller.
>>>
>>> R11 is a variant based on SD v4.0 specification.
>>>
>>> With this driver, R11 mmc can be initialized, can be mounted, read and
>>> written.
>>>
>>> Original-by: Billows Wu <billows.wu@xxxxxxxxxxxxxx>
>>> Signed-off-by: Chunyan Zhang <chunyan.zhang@xxxxxxxxxxxxxx>
>>> ---
>>> drivers/mmc/host/Kconfig | 13 ++
>>> drivers/mmc/host/Makefile | 1 +
>>> drivers/mmc/host/sdhci-sprd.c | 437 ++++++++++++++++++++++++++++++++++++++++++
>>> 3 files changed, 451 insertions(+)
>>> create mode 100644 drivers/mmc/host/sdhci-sprd.c
>>>
>>> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
>>> index 0581c19..c5424dc 100644
>>> --- a/drivers/mmc/host/Kconfig
>>> +++ b/drivers/mmc/host/Kconfig
>>> @@ -581,6 +581,19 @@ config MMC_SDRICOH_CS
>>> To compile this driver as a module, choose M here: the
>>> module will be called sdricoh_cs.
>>>
>>> +config MMC_SDHCI_SPRD
>>> + tristate "Spreadtrum SDIO host Controller"
>>> + depends on ARCH_SPRD
>>> + depends on MMC_SDHCI_PLTFM
>>> + select MMC_SDHCI_IO_ACCESSORS
>>> + help
>>> + This selects the SDIO Host Controller in Spreadtrum
>>> + SoCs, this driver supports R11(IP version: R11P0).
>>> +
>>> + If you have a controller with this interface, say Y or M here.
>>> +
>>> + If unsure, say N.
>>> +
>>> config MMC_TMIO_CORE
>>> tristate
>>>
>>> diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
>>> index 85dc132..b0b6802 100644
>>> --- a/drivers/mmc/host/Makefile
>>> +++ b/drivers/mmc/host/Makefile
>>> @@ -89,6 +89,7 @@ obj-$(CONFIG_MMC_SDHCI_ST) += sdhci-st.o
>>> obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32) += sdhci-pic32.o
>>> obj-$(CONFIG_MMC_SDHCI_BRCMSTB) += sdhci-brcmstb.o
>>> obj-$(CONFIG_MMC_SDHCI_OMAP) += sdhci-omap.o
>>> +obj-$(CONFIG_MMC_SDHCI_SPRD) += sdhci-sprd.o
>>> obj-$(CONFIG_MMC_CQHCI) += cqhci.o
>>>
>>> ifeq ($(CONFIG_CB710_DEBUG),y)
>>> diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
>>> new file mode 100644
>>> index 0000000..8d37ecb
>>> --- /dev/null
>>> +++ b/drivers/mmc/host/sdhci-sprd.c
>>> @@ -0,0 +1,437 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +//
>>> +// Secure Digital Host Controller
>>> +//
>>> +// Copyright (C) 2018 Spreadtrum, Inc.
>>> +// Author: Chunyan Zhang <chunyan.zhang@xxxxxxxxxxxxxx>
>>> +
>>> +#include <linux/delay.h>
>>> +#include <linux/dma-mapping.h>
>>> +#include <linux/highmem.h>
>>> +#include <linux/module.h>
>>> +#include <linux/of.h>
>>> +#include <linux/of_device.h>
>>> +#include <linux/of_gpio.h>
>>> +#include <linux/platform_device.h>
>>> +#include <linux/pm_runtime.h>
>>> +#include <linux/regulator/consumer.h>
>>> +#include <linux/slab.h>
>>> +
>>> +#include "sdhci-pltfm.h"
>>> +
>>> +#define SDHCI_SPRD_REG_32_DLL_DLY_OFFSET 0x208
>>> +#define SDHCIBSPRD_IT_WR_DLY_INV BIT(5)
>>> +#define SDHCI_SPRD_BIT_CMD_DLY_INV BIT(13)
>>> +#define SDHCI_SPRD_BIT_POSRD_DLY_INV BIT(21)
>>> +#define SDHCI_SPRD_BIT_NEGRD_DLY_INV BIT(29)
>>> +
>>> +#define SDHCI_SPRD_REG_32_BUSY_POSI 0x250
>>> +#define SDHCI_SPRD_BIT_OUTR_CLK_AUTO_EN BIT(25)
>>> +#define SDHCI_SPRD_BIT_INNR_CLK_AUTO_EN BIT(24)
>>> +
>>> +#define SDHCI_SPRD_REG_DEBOUNCE 0x28C
>>> +#define SDHCI_SPRD_BIT_DLL_BAK BIT(0)
>>> +#define SDHCI_SPRD_BIT_DLL_VAL BIT(1)
>>> +
>>> +#define SDHCI_SPRD_INT_SIGNAL_MASK 0x1B7F410B
>>> +
>>> +/* SDHCI_HOST_CONTROL2 */
>>> +#define SDHCI_SPRD_CTRL_HS200 0x0005
>>> +#define SDHCI_SPRD_CTRL_HS400 0x0006
>>> +
>>> +/* SDHCI_SOFTWARE_RESET */
>>> +#define SDHCI_HW_RESET_CARD 0x8 /* For Spreadtrum's design */
>>> +
>>> +#define SDHCI_SPRD_MAX_CUR 0xFFFFFF
>>> +#define SDHCI_SPRD_CLK_MAX_DIV 1023
>>> +
>>> +#define SDHCI_SPRD_CLK_DEF_RATE 26000000
>>> +
>>> +struct sdhci_sprd_host {
>>> + u32 version;
>>> + struct clk *clk_sdio;
>>> + struct clk *clk_enable;
>>> + u32 base_rate;
>>> +};
>>> +
>>> +#define TO_SPRD_HOST(host) sdhci_pltfm_priv(sdhci_priv(host))
>>> +
>>> +static void sdhci_sprd_init_config(struct sdhci_host *host)
>>> +{
>>> + u16 val;
>>> +
>>> + /* set 64-bit addressing modes */
>>> + val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
>>> + val |= SDHCI_CTRL_64BIT_ADDR;
>>> + sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
>>
>> SDHCI should do that when enabling 64-bit DMA in V4 mode. Needs to be done
>> either in sdhci_prepare_data() or after every reset or resume (e.g. when
>> ->enable_dma() is called).
>
> Ok, then how about doing in sdhci_do_reset() once reset-for-all? That
> also can avoid to set this register each time when sending cmd if
> doing in sdhci_prepare_data().
>
> I also prefer to move writing of SDHCI_HOST_CONTROL from
> sdhci_prepare_data() to sdhci_do_reset(), can that work properly?
> Since I noticed that flags of DMA (ADMA/SDMA) were set during
> initialization (i.e. probe).
>
> What's your opinion?
Actually, looking at the code now, it looks like sdhci_init() is a better
place than sdhci_do_reset().
>
>>
>>> +
>>> + /* set dll backup mode */
>>> + val = sdhci_readl(host, SDHCI_SPRD_REG_DEBOUNCE);
>>> + val |= SDHCI_SPRD_BIT_DLL_BAK | SDHCI_SPRD_BIT_DLL_VAL;
>>> + sdhci_writel(host, val, SDHCI_SPRD_REG_DEBOUNCE);
>>> +
>>> + /* set CMD23 enabled */
>>> + val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
>>> + val |= SDHCI_CMD23_ENABLE;
>>> + sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
>>
>> SDHCI should do that. Needs to be done either when enabling auto-CMD23 or
>> after every reset or resume.
>
> Ok, will do in sdhci_do_reset() as well.
That one is tricky since it needs to be based on the capability of the card.
But again the setting can be done in sdhci_init().
>
>>
>>> +}
>>> +
>>> +static inline u32 sdhci_sprd_readl(struct sdhci_host *host, int reg)
>>> +{
>>> + if (unlikely(reg == SDHCI_MAX_CURRENT))
>>> + return SDHCI_SPRD_MAX_CUR;
>>> +
>>> + return readl_relaxed(host->ioaddr + reg);
>>> +}
>>> +
>>> +static inline void sdhci_sprd_writel(struct sdhci_host *host, u32 val, int reg)
>>> +{
>>> + /* SDHCI_MAX_CURRENT is reserved on Spreadtrum's platform */
>>> + if (unlikely(reg == SDHCI_MAX_CURRENT))
>>> + return;
>>> +
>>> + if (unlikely(reg == SDHCI_SIGNAL_ENABLE || reg == SDHCI_INT_ENABLE))
>>> + val = val & SDHCI_SPRD_INT_SIGNAL_MASK;
>>> +
>>> + writel_relaxed(val, host->ioaddr + reg);
>>> +}
>>> +
>>> +static inline void sdhci_sprd_writeb(struct sdhci_host *host, u8 val, int reg)
>>> +{
>>> + if (unlikely(reg == SDHCI_SOFTWARE_RESET)) {
>>> + if (readb_relaxed(host->ioaddr + reg) & SDHCI_HW_RESET_CARD)
>>> + val |= SDHCI_HW_RESET_CARD;
>>> + }
>>> +
>>> + writeb_relaxed(val, host->ioaddr + reg);
>>> +}
>>> +
>>> +static inline void sdhci_sprd_sd_clk_off(struct sdhci_host *host)
>>> +{
>>> + u16 ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
>>> +
>>> + ctrl &= ~SDHCI_CLOCK_CARD_EN;
>>> + sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
>>> +}
>>> +
>>> +static inline void
>>> +sdhci_sprd_set_dll_invert(struct sdhci_host *host, u32 mask, bool en)
>>> +{
>>> + u32 dll_dly_offset;
>>> +
>>> + dll_dly_offset = sdhci_readl(host, SDHCI_SPRD_REG_32_DLL_DLY_OFFSET);
>>> + if (en)
>>> + dll_dly_offset |= mask;
>>> + else
>>> + dll_dly_offset &= ~mask;
>>> + sdhci_writel(host, dll_dly_offset, SDHCI_SPRD_REG_32_DLL_DLY_OFFSET);
>>> +}
>>> +
>>> +static inline u32 sdhci_sprd_calc_div(u32 base_clk, u32 clk)
>>> +{
>>> + u32 div;
>>> +
>>> + /* select 2x clock source */
>>> + if (base_clk <= clk * 2)
>>> + return 0;
>>> +
>>> + div = (u32) (base_clk / (clk * 2));
>>> +
>>> + if ((base_clk / div) > (clk * 2))
>>> + div++;
>>> +
>>> + if (div > SDHCI_SPRD_CLK_MAX_DIV)
>>> + div = SDHCI_SPRD_CLK_MAX_DIV;
>>> +
>>> + if (div % 2)
>>> + div = (div + 1) / 2;
>>> + else
>>> + div = div / 2;
>>> +
>>> + return div;
>>> +}
>>> +
>>> +static inline void _sdhci_sprd_set_clock(struct sdhci_host *host,
>>> + unsigned int clk)
>>> +{
>>> + struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);
>>> + u32 div, val, mask;
>>> +
>>> + div = sdhci_sprd_calc_div(sprd_host->base_rate, clk);
>>> +
>>> + clk |= ((div & 0x300) >> 2) | ((div & 0xFF) << 8);
>>> + sdhci_enable_clk(host, clk);
>>> +
>>> + /* enable auto gate sdhc_enable_auto_gate */
>>> + val = sdhci_readl(host, SDHCI_SPRD_REG_32_BUSY_POSI);
>>> + mask = SDHCI_SPRD_BIT_OUTR_CLK_AUTO_EN |
>>> + SDHCI_SPRD_BIT_INNR_CLK_AUTO_EN;
>>> + if (mask != (val & mask)) {
>>> + val |= mask;
>>> + sdhci_writel(host, val, SDHCI_SPRD_REG_32_BUSY_POSI);
>>> + }
>>> +}
>>> +
>>> +static void sdhci_sprd_set_clock(struct sdhci_host *host, unsigned int clock)
>>> +{
>>> + bool en = false;
>>> +
>>> + if (clock == 0) {
>>> + sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
>>> + } else if (clock != host->clock) {
>>> + sdhci_sprd_sd_clk_off(host);
>>> + _sdhci_sprd_set_clock(host, clock);
>>> +
>>> + if (clock <= 400000)
>>> + en = true;
>>> + sdhci_sprd_set_dll_invert(host, SDHCI_SPRD_BIT_CMD_DLY_INV |
>>> + SDHCI_SPRD_BIT_POSRD_DLY_INV, en);
>>> + } else {
>>> + _sdhci_sprd_set_clock(host, clock);
>>> + }
>>> +}
>>> +
>>> +static unsigned int sdhci_sprd_get_max_clock(struct sdhci_host *host)
>>> +{
>>> + struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);
>>> +
>>> + return clk_round_rate(sprd_host->clk_sdio, ULONG_MAX);
>>> +}
>>> +
>>> +static unsigned int sdhci_sprd_get_min_clock(struct sdhci_host *host)
>>> +{
>>> + return 400000;
>>> +}
>>> +
>>> +static void sdhci_sprd_set_uhs_signaling(struct sdhci_host *host,
>>> + unsigned int timing)
>>> +{
>>> + u16 ctrl_2;
>>> +
>>> + if (timing == host->timing)
>>> + return;
>>> +
>>> + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
>>> + /* Select Bus Speed Mode for host */
>>> + ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
>>> + switch (timing) {
>>> + case MMC_TIMING_UHS_SDR12:
>>> + ctrl_2 = SDHCI_CTRL_UHS_SDR12;
>>
>> Shouldn't this and the following ones be '|=' not '='
>>
>>> + break;
>>> + case MMC_TIMING_MMC_HS:
>>> + case MMC_TIMING_SD_HS:
>>> + case MMC_TIMING_UHS_SDR25:
>>> + ctrl_2 = SDHCI_CTRL_UHS_SDR25;
>>> + break;
>>> + case MMC_TIMING_UHS_SDR50:
>>> + ctrl_2 = SDHCI_CTRL_UHS_SDR50;
>>> + break;
>>> + case MMC_TIMING_UHS_SDR104:
>>> + ctrl_2 = SDHCI_CTRL_UHS_SDR104;
>>> + break;
>>> + case MMC_TIMING_UHS_DDR50:
>>> + case MMC_TIMING_MMC_DDR52:
>>> + ctrl_2 = SDHCI_CTRL_UHS_DDR50;
>>> + break;
>>> + case MMC_TIMING_MMC_HS200:
>>> + ctrl_2 = SDHCI_SPRD_CTRL_HS200;
>>> + break;
>>> + case MMC_TIMING_MMC_HS400:
>>> + ctrl_2 = SDHCI_SPRD_CTRL_HS400;
>>> + break;
>>> + default:
>>> + break;
>>> + }
>>> +
>>> + sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
>>> +}
>>> +
>>> +static void sdhci_sprd_hw_reset(struct sdhci_host *host)
>>> +{
>>> + int val;
>>> +
>>> + /* Note: don't use sdhci_readb/writeb() API here */
>>> + val = readb_relaxed(host->ioaddr + SDHCI_SOFTWARE_RESET);
>>> + val &= ~SDHCI_HW_RESET_CARD;
>>> + writeb_relaxed(val, host->ioaddr + SDHCI_SOFTWARE_RESET);
>>> + udelay(10);
>>> +
>>> + val |= SDHCI_HW_RESET_CARD;
>>> + writeb_relaxed(val, host->ioaddr + SDHCI_SOFTWARE_RESET);
>>> + udelay(300);
>>
>> usleep_range() maybe
>
> Ok, I will have another look at it.
>
> Thanks for the comments,
> Chunyan
>
>>
>>> +}
>>> +
>>> +static struct sdhci_ops sdhci_sprd_ops = {
>>> + .read_l = sdhci_sprd_readl,
>>> + .write_l = sdhci_sprd_writel,
>>> + .write_b = sdhci_sprd_writeb,
>>> + .set_clock = sdhci_sprd_set_clock,
>>> + .get_max_clock = sdhci_sprd_get_max_clock,
>>> + .get_min_clock = sdhci_sprd_get_min_clock,
>>> + .set_bus_width = sdhci_set_bus_width,
>>> + .reset = sdhci_reset,
>>> + .set_uhs_signaling = sdhci_sprd_set_uhs_signaling,
>>> + .hw_reset = sdhci_sprd_hw_reset,
>>> +};
>>> +
>>> +static const struct sdhci_pltfm_data sdhci_sprd_pdata = {
>>> + .quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK,
>>> + .quirks2 = SDHCI_QUIRK2_BROKEN_HS200,
>>> + .ops = &sdhci_sprd_ops,
>>> +};
>>> +
>>> +static int sdhci_sprd_probe(struct platform_device *pdev)
>>> +{
>>> + struct sdhci_host *host;
>>> + struct sdhci_sprd_host *sprd_host;
>>> + struct clk *clk;
>>> + int ret = 0;
>>> +
>>> + host = sdhci_pltfm_init(pdev, &sdhci_sprd_pdata, sizeof(*sprd_host));
>>> + if (IS_ERR(host))
>>> + return PTR_ERR(host);
>>> +
>>> + host->dma_mask = DMA_BIT_MASK(64);
>>> + pdev->dev.dma_mask = &host->dma_mask;
>>> +
>>> + host->mmc->caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED |
>>> + MMC_CAP_ERASE | MMC_CAP_CMD23;
>>> + ret = mmc_of_parse(host->mmc);
>>> + if (ret)
>>> + goto pltfm_free;
>>> +
>>> + sprd_host = TO_SPRD_HOST(host);
>>> +
>>> + clk = devm_clk_get(&pdev->dev, "sdio");
>>> + if (IS_ERR(clk)) {
>>> + ret = PTR_ERR(clk);
>>> + goto pltfm_free;
>>> + }
>>> + sprd_host->clk_sdio = clk;
>>> + sprd_host->base_rate = clk_get_rate(sprd_host->clk_sdio);
>>> + if (!sprd_host->base_rate)
>>> + sprd_host->base_rate = SDHCI_SPRD_CLK_DEF_RATE;
>>> +
>>> + clk = devm_clk_get(&pdev->dev, "enable");
>>> + if (IS_ERR(clk)) {
>>> + ret = PTR_ERR(clk);
>>> + goto pltfm_free;
>>> + }
>>> + sprd_host->clk_enable = clk;
>>> +
>>> + ret = clk_prepare_enable(sprd_host->clk_sdio);
>>> + if (ret)
>>> + goto pltfm_free;
>>> +
>>> + clk_prepare_enable(sprd_host->clk_enable);
>>> + if (ret)
>>> + goto clk_disable;
>>> +
>>> + sdhci_sprd_init_config(host);
>>> + host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
>>> + sprd_host->version = ((host->version & SDHCI_VENDOR_VER_MASK) >>
>>> + SDHCI_VENDOR_VER_SHIFT);
>>> +
>>> + pm_runtime_get_noresume(&pdev->dev);
>>> + pm_runtime_set_active(&pdev->dev);
>>> + pm_runtime_enable(&pdev->dev);
>>> + pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
>>> + pm_runtime_use_autosuspend(&pdev->dev);
>>> + pm_suspend_ignore_children(&pdev->dev, 1);
>>> +
>>> + sdhci_enable_v4_mode(host);
>>> + ret = sdhci_add_host(host);
>>> + if (ret) {
>>> + dev_err(&pdev->dev, "failed to add mmc host: %d\n", ret);
>>> + goto pm_runtime_disable;
>>> + }
>>> +
>>> + pm_runtime_mark_last_busy(&pdev->dev);
>>> + pm_runtime_put_autosuspend(&pdev->dev);
>>> +
>>> + return 0;
>>> +
>>> +pm_runtime_disable:
>>> + pm_runtime_disable(&pdev->dev);
>>> + pm_runtime_set_suspended(&pdev->dev);
>>> +
>>> + clk_disable_unprepare(sprd_host->clk_enable);
>>> +
>>> +clk_disable:
>>> + clk_disable_unprepare(sprd_host->clk_sdio);
>>> +
>>> +pltfm_free:
>>> + sdhci_pltfm_free(pdev);
>>> + return ret;
>>> +}
>>> +
>>> +static int sdhci_sprd_remove(struct platform_device *pdev)
>>> +{
>>> + struct sdhci_host *host = platform_get_drvdata(pdev);
>>> + struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);
>>> + struct mmc_host *mmc = host->mmc;
>>> +
>>> + mmc_remove_host(mmc);
>>> + clk_disable_unprepare(sprd_host->clk_sdio);
>>> + clk_disable_unprepare(sprd_host->clk_enable);
>>> +
>>> + mmc_free_host(mmc);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static const struct of_device_id sdhci_sprd_of_match[] = {
>>> + { .compatible = "sprd,sdhci-r11", },
>>> + { }
>>> +};
>>> +MODULE_DEVICE_TABLE(of, sdhci_sprd_of_match);
>>> +
>>> +#ifdef CONFIG_PM
>>> +static int sdhci_sprd_runtime_suspend(struct device *dev)
>>> +{
>>> + struct sdhci_host *host = dev_get_drvdata(dev);
>>> + struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);
>>> +
>>> + sdhci_runtime_suspend_host(host);
>>> +
>>> + clk_disable_unprepare(sprd_host->clk_sdio);
>>> + clk_disable_unprepare(sprd_host->clk_enable);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int sdhci_sprd_runtime_resume(struct device *dev)
>>> +{
>>> + struct sdhci_host *host = dev_get_drvdata(dev);
>>> + struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);
>>> +
>>> + clk_prepare_enable(sprd_host->clk_enable);
>>> + clk_prepare_enable(sprd_host->clk_sdio);
>>
>> Drivers usually check the error returns of clk_prepare_enable().
>>
>>> +
>>> + sdhci_runtime_resume_host(host);
>>> +
>>> + return 0;
>>> +}
>>> +#endif
>>> +
>>> +static const struct dev_pm_ops sdhci_sprd_pm_ops = {
>>> + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
>>> + pm_runtime_force_resume)
>>> + SET_RUNTIME_PM_OPS(sdhci_sprd_runtime_suspend,
>>> + sdhci_sprd_runtime_resume, NULL)
>>> +};
>>> +
>>> +static struct platform_driver sdhci_sprd_driver = {
>>> + .probe = sdhci_sprd_probe,
>>> + .remove = sdhci_sprd_remove,
>>> + .driver = {
>>> + .name = "sdhci_sprd_r11",
>>> + .of_match_table = of_match_ptr(sdhci_sprd_of_match),
>>> + .pm = &sdhci_sprd_pm_ops,
>>> + },
>>> +};
>>> +module_platform_driver(sdhci_sprd_driver);
>>> +
>>> +MODULE_DESCRIPTION("Spreadtrum sdio host controller r11 driver");
>>> +MODULE_LICENSE("GPL v2");
>>> +MODULE_ALIAS("platform:sdhci-sprd-r11");
>>>
>>
>
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