hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ARM: 5725/2: U300 switch MMCI to use regulator 

This switches the U300 over from using a custom translate_vdd
function (which was just flipping blind bits in the hardware)
to using the regulator that actually controls the MMC voltage.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Linus Walleij 2009-09-24 21:42:44 +01:00 committed by Russell King
parent 3d81277b65
commit f9e8eefc60
1 changed files with 4 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
arch/arm/mach-u300/mmc.c
View File

@ -40,64 +40,6 @@ static unsigned int mmc_status(struct device *dev)
return mmci_card->mmc_inserted;
}
/*
* Here follows a large chunk of code which will only be enabled if you
* have both the AB3100 chip mounted and the MMC subsystem activated.
*/
static u32 mmc_translate_vdd(struct device *dev, unsigned int voltage)
{
int v;
/*
* MMC Spec:
* bit 7: 1.70 - 1.95V
* bit 8 - 14: 2.0 - 2.6V
* bit 15 - 23: 2.7 - 3.6V
*
* ab3100 voltages:
* 000 - 2.85V
* 001 - 2.75V
* 010 - 1.8V
* 011 - 1.5V
*/
switch (voltage) {
case 8:
v = 3;
break;
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
v = 1;
break;
case 16:
v = 1;
break;
case 17:
case 18:
case 19:
case 20:
case 21:
case 22:
case 23:
case 24:
v = 0;
break;
default:
v = 0;
break;
}
/* PL180 voltage register bits */
return v << 2;
}
static int mmci_callback(void *data)
{
struct mmci_card_event *mmci_card = data;
@ -154,9 +96,11 @@ int __devinit mmc_init(struct amba_device *adev)
if (!mmci_card)
return -ENOMEM;
/*
* Do not set ocr_mask or voltage translation function,
* we have a regulator we can control instead.
*/
/* Nominally 2.85V on our platform */
mmci_card->mmc0_plat_data.ocr_mask = MMC_VDD_28_29;
mmci_card->mmc0_plat_data.translate_vdd = mmc_translate_vdd;
mmci_card->mmc0_plat_data.status = mmc_status;
mmci_card->mmc0_plat_data.gpio_wp = -1;
mmci_card->mmc0_plat_data.gpio_cd = -1;