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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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9c43df5791
The support is implemented via platform data accessors, new module (of_mmc_spi) will be created automatically when the driver compiles on OpenFirmware platforms. Link-time dependency will load the module automatically. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
#ifndef __LINUX_SPI_MMC_SPI_H
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#define __LINUX_SPI_MMC_SPI_H
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#include <linux/device.h>
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#include <linux/spi/spi.h>
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#include <linux/interrupt.h>
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struct mmc_host;
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/* Put this in platform_data of a device being used to manage an MMC/SD
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* card slot. (Modeled after PXA mmc glue; see that for usage examples.)
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*
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* REVISIT This is not a spi-specific notion. Any card slot should be
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* able to handle it. If the MMC core doesn't adopt this kind of notion,
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* switch the "struct device *" parameters over to "struct spi_device *".
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*/
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struct mmc_spi_platform_data {
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/* driver activation and (optional) card detect irq hookup */
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int (*init)(struct device *,
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irqreturn_t (*)(int, void *),
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void *);
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void (*exit)(struct device *, void *);
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/* sense switch on sd cards */
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int (*get_ro)(struct device *);
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/*
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* If board does not use CD interrupts, driver can optimize polling
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* using this function.
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*/
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int (*get_cd)(struct device *);
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/* Capabilities to pass into mmc core (e.g. MMC_CAP_NEEDS_POLL). */
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unsigned long caps;
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/* how long to debounce card detect, in msecs */
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u16 detect_delay;
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/* power management */
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u16 powerup_msecs; /* delay of up to 250 msec */
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u32 ocr_mask; /* available voltages */
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void (*setpower)(struct device *, unsigned int maskval);
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};
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#ifdef CONFIG_OF
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extern struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi);
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extern void mmc_spi_put_pdata(struct spi_device *spi);
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#else
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static inline struct mmc_spi_platform_data *
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mmc_spi_get_pdata(struct spi_device *spi)
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{
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return spi->dev.platform_data;
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}
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static inline void mmc_spi_put_pdata(struct spi_device *spi) {}
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#endif /* CONFIG_OF */
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#endif /* __LINUX_SPI_MMC_SPI_H */
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