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mfd: rtsx: Implement driving adjustment to device-dependent callbacks

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Implement different ways of selecting driving capability(a necessary adjustment
along with voltage change). It was origionally in device-independent
mmc/host/rtsx_pci_sdmmc.c. Moving it here to support devices which may have a
different way of adjustment.

Signed-off-by: Roger Tseng <rogerable@realtek.com>
Reviewed-by: Wei WANG <wei_wang@realsil.com.cn>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Roger Tseng
2013-02-04 15:45:58 +08:00
committed by Samuel Ortiz
parent 8ea402f564
commit 88a7ee37f3
3 changed files with 29 additions and 3 deletions
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8
drivers/mfd/rts5209.c
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@@ -149,10 +149,18 @@ static int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
int err;
if (voltage == OUTPUT_3V3) {
err = rtsx_pci_write_register(pcr,
SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_D);
if (err < 0)
return err;
err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
if (err < 0)
return err;
} else if (voltage == OUTPUT_1V8) {
err = rtsx_pci_write_register(pcr,
SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_B);
if (err < 0)
return err;
err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
if (err < 0)
return err;