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mfd: Adding twl6030 mmc card detect support for MMC1

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Adding card detect callback function and card detect configuration
function for MMC1 Controller on OMAP4.

Card detect configuration function does initial configuration of the
MMC Control & PullUp-PullDown registers of Phoenix.

For MMC1 Controller, card detect interrupt source is
twl6030 which is non-gpio. The card detect call back function provides
card present/absent status by reading MMC Control register present
on twl6030.

Since OMAP4 doesn't use any GPIO line as used in OMAP3 for card detect,
the suspend/resume initialization which was done in omap_hsmmc_gpio_init
previously is moved to the probe thus making it generic for both OMAP3 &
OMAP4.

Cc: Tony Lindgren <tony@atomide.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Madhusudhan Chikkature <madhu.cr@ti.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Kishore Kadiyala <kishore.kadiyala@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
kishore kadiyala 2010-09-24 17:13:20 +00:00 • committed by Samuel Ortiz
parent 8e00593557
commit 72f2e2c763
4 changed files with 112 additions and 3 deletions
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31
include/linux/i2c/twl.h
View file

@ -141,6 +141,16 @@
#define TWL6030_CHARGER_CTRL_INT_MASK 0x10
#define TWL6030_CHARGER_FAULT_INT_MASK 0x60
#define TWL6030_MMCCTRL 0xEE
#define VMMC_AUTO_OFF (0x1 << 3)
#define SW_FC (0x1 << 2)
#define STS_MMC 0x1
#define TWL6030_CFG_INPUT_PUPD3 0xF2
#define MMC_PU (0x1 << 3)
#define MMC_PD (0x1 << 2)
#define TWL4030_CLASS_ID 0x4030
#define TWL6030_CLASS_ID 0x6030
@ -173,6 +183,27 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
int twl6030_interrupt_unmask(u8 bit_mask, u8 offset);
int twl6030_interrupt_mask(u8 bit_mask, u8 offset);
/* Card detect Configuration for MMC1 Controller on OMAP4 */
#ifdef CONFIG_TWL4030_CORE
int twl6030_mmc_card_detect_config(void);
#else
static inline int twl6030_mmc_card_detect_config(void)
{
pr_debug("twl6030_mmc_card_detect_config not supported\n");
return 0;
}
#endif
/* MMC1 Controller on OMAP4 uses Phoenix irq for Card detect */
#ifdef CONFIG_TWL4030_CORE
int twl6030_mmc_card_detect(struct device *dev, int slot);
#else
static inline int twl6030_mmc_card_detect(struct device *dev, int slot)
{
pr_debug("Call back twl6030_mmc_card_detect not supported\n");
return -EIO;
}
#endif
/*----------------------------------------------------------------------*/
/*