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ARM: 7219/1: mmc: mmci: Change vdd_handler to a generic ios_handler 

The purpose of the vdd_handler does not make sense. We remove it
and use a generic approach instead. A new ios_handler is added, the
purpose of which e.g. can be to control GPIO pins to a levelshifter.

Previously the vdd_handler was also used for making additional
changes to the power register bits. This option is superfluous and is
therefore removed.

Adaptaptions from the old vdd_handler to the new ios_handler is done for
mach-ux500 board, which was the only one using the vdd_handler.

This patch is based upon a patch from Sebastian Rasmussen.

Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Rasmussen <sebastian.rasmussen@stericsson.com>
Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Ulf Hansson 2011-12-13 16:57:55 +01:00 committed by Russell King
parent 4d1a3a0dc5
commit bc521818e2
3 changed files with 15 additions and 20 deletions
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21
arch/arm/mach-ux500/board-mop500-sdi.c
View File

@ -31,21 +31,13 @@
* SDI 0 (MicroSD slot)
*/
/* MMCIPOWER bits */
#define MCI_DATA2DIREN (1 << 2)
#define MCI_CMDDIREN (1 << 3)
#define MCI_DATA0DIREN (1 << 4)
#define MCI_DATA31DIREN (1 << 5)
#define MCI_FBCLKEN (1 << 7)
/* GPIO pins used by the sdi0 level shifter */
static int sdi0_en = -1;
static int sdi0_vsel = -1;
static u32 mop500_sdi0_vdd_handler(struct device *dev, unsigned int vdd,
unsigned char power_mode)
static int mop500_sdi0_ios_handler(struct device *dev, struct mmc_ios *ios)
{
switch (power_mode) {
switch (ios->power_mode) {
case MMC_POWER_UP:
case MMC_POWER_ON:
/*
@ -65,8 +57,7 @@ static u32 mop500_sdi0_vdd_handler(struct device *dev, unsigned int vdd,
break;
}
return MCI_FBCLKEN | MCI_CMDDIREN | MCI_DATA0DIREN |
MCI_DATA2DIREN | MCI_DATA31DIREN;
return 0;
}
#ifdef CONFIG_STE_DMA40
@ -90,13 +81,17 @@ static struct stedma40_chan_cfg mop500_sdi0_dma_cfg_tx = {
#endif
static struct mmci_platform_data mop500_sdi0_data = {
.vdd_handler = mop500_sdi0_vdd_handler,
.ios_handler = mop500_sdi0_ios_handler,
.ocr_mask = MMC_VDD_29_30,
.f_max = 50000000,
.capabilities = MMC_CAP_4_BIT_DATA |
MMC_CAP_SD_HIGHSPEED |
MMC_CAP_MMC_HIGHSPEED,
.gpio_wp = -1,
.sigdir = MCI_ST_FBCLKEN |
MCI_ST_CMDDIREN |
MCI_ST_DATA0DIREN |
MCI_ST_DATA2DIREN,
#ifdef CONFIG_STE_DMA40
.dma_filter = stedma40_filter,
.dma_rx_param = &mop500_sdi0_dma_cfg_rx,

8
drivers/mmc/host/mmci.c
View File

@ -1026,6 +1026,10 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
unsigned long flags;
int ret;
if (host->plat->ios_handler &&
host->plat->ios_handler(mmc_dev(mmc), ios))
dev_err(mmc_dev(mmc), "platform ios_handler failed\n");
switch (ios->power_mode) {
case MMC_POWER_OFF:
if (host->vcc)
@ -1045,10 +1049,6 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
return;
}
}
if (host->plat->vdd_handler)
pwr |= host->plat->vdd_handler(mmc_dev(mmc), ios->vdd,
ios->power_mode);
/*
* The ST Micro variant doesn't have the PL180s MCI_PWR_UP
* and instead uses MCI_PWR_ON so apply whatever value is

6
include/linux/amba/mmci.h
View File

@ -31,7 +31,8 @@ struct dma_chan;
* @ocr_mask: available voltages on the 4 pins from the block, this
* is ignored if a regulator is used, see the MMC_VDD_* masks in
* mmc/host.h
* @vdd_handler: a callback function to translate a MMC_VDD_*
* @ios_handler: a callback function to act on specfic ios changes,
* used for example to control a levelshifter
* mask into a value to be binary (or set some other custom bits
* in MMCIPWR) or:ed and written into the MMCIPWR register of the
* block. May also control external power based on the power_mode.
@ -61,8 +62,7 @@ struct dma_chan;
struct mmci_platform_data {
unsigned int f_max;
unsigned int ocr_mask;
u32 (*vdd_handler)(struct device *, unsigned int vdd,
unsigned char power_mode);
int (*ios_handler)(struct device *, struct mmc_ios *);
unsigned int (*status)(struct device *);
int gpio_wp;
int gpio_cd;