tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __LINUX_SPI_MMC_SPI_H
2#define __LINUX_SPI_MMC_SPI_H
3
4#include <linux/spi/spi.h>
5#include <linux/interrupt.h>
6
7struct device;
8struct mmc_host;
9
10#define MMC_SPI_USE_CD_GPIO (1 << 0)
11#define MMC_SPI_USE_RO_GPIO (1 << 1)
12#define MMC_SPI_CD_GPIO_ACTIVE_LOW (1 << 2)
13#define MMC_SPI_RO_GPIO_ACTIVE_LOW (1 << 3)
14
15/* Put this in platform_data of a device being used to manage an MMC/SD
16 * card slot. (Modeled after PXA mmc glue; see that for usage examples.)
17 *
18 * REVISIT This is not a spi-specific notion. Any card slot should be
19 * able to handle it. If the MMC core doesn't adopt this kind of notion,
20 * switch the "struct device *" parameters over to "struct spi_device *".
21 */
22struct mmc_spi_platform_data {
23 /* driver activation and (optional) card detect irq hookup */
24 int (*init)(struct device *,
25 irqreturn_t (*)(int, void *),
26 void *);
27 void (*exit)(struct device *, void *);
28
29 /*
30 * Card Detect and Read Only GPIOs. To enable debouncing on the card
31 * detect GPIO, set the cd_debounce to the debounce time in
32 * microseconds.
33 */
34 unsigned int flags;
35 unsigned int cd_gpio;
36 unsigned int cd_debounce;
37 unsigned int ro_gpio;
38
39 /* Capabilities to pass into mmc core (e.g. MMC_CAP_NEEDS_POLL). */
40 unsigned long caps;
41 unsigned long caps2;
42
43 /* how long to debounce card detect, in msecs */
44 u16 detect_delay;
45
46 /* power management */
47 u16 powerup_msecs; /* delay of up to 250 msec */
48 u32 ocr_mask; /* available voltages */
49 void (*setpower)(struct device *, unsigned int maskval);
50};
51
52#ifdef CONFIG_OF
53extern struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi);
54extern void mmc_spi_put_pdata(struct spi_device *spi);
55#else
56static inline struct mmc_spi_platform_data *
57mmc_spi_get_pdata(struct spi_device *spi)
58{
59 return spi->dev.platform_data;
60}
61static inline void mmc_spi_put_pdata(struct spi_device *spi) {}
62#endif /* CONFIG_OF */
63
64#endif /* __LINUX_SPI_MMC_SPI_H */