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mfd: rtsx: Add output voltage switch hook

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Different card reader has different method to switch output voltage,
add this callback to let the card reader implement its individual switch
function.
This is needed as rtl8411 has a specific switch output voltage procedure.

Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Wei WANG
2013-01-23 09:51:04 +08:00
committed by Samuel Ortiz
parent 00441b5e6b
commit d817ac4e18
5 changed files with 85 additions and 4 deletions
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20
drivers/mfd/rts5209.c
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@@ -144,6 +144,25 @@ static int rts5209_card_power_off(struct rtsx_pcr *pcr, int card)
return rtsx_pci_send_cmd(pcr, 100);
}
static int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
{
int err;
if (voltage == OUTPUT_3V3) {
err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
if (err < 0)
return err;
} else if (voltage == OUTPUT_1V8) {
err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
if (err < 0)
return err;
} else {
return -EINVAL;
}
return 0;
}
static const struct pcr_ops rts5209_pcr_ops = {
.extra_init_hw = rts5209_extra_init_hw,
.optimize_phy = rts5209_optimize_phy,
@@ -153,6 +172,7 @@ static const struct pcr_ops rts5209_pcr_ops = {
.disable_auto_blink = rts5209_disable_auto_blink,
.card_power_on = rts5209_card_power_on,
.card_power_off = rts5209_card_power_off,
.switch_output_voltage = rts5209_switch_output_voltage,
.cd_deglitch = NULL,
};