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mmc: omap_hsmmc: adapt hsmmc to use pbias regulator

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In DT case, PBAIS registers are programmed via regulator,
use regulator APIs to control PBIAS.

Signed-off-by: Balaji T K <balajitk@ti.com>
Tested-by: Florian Vaussard <florian.vaussard@epfl.ch>
Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Chris Ball <chris@printf.net>
This commit is contained in:
Balaji T K 2014-02-19 20:26:40 +05:30 committed by Chris Ball
parent 11469e0bb1
commit e99448ff1f
1 changed files with 37 additions and 0 deletions
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37
drivers/mmc/host/omap_hsmmc.c
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@ -126,6 +126,10 @@
#define OMAP_MMC_MAX_CLOCK 52000000
#define DRIVER_NAME "omap_hsmmc"
#define VDD_1V8 1800000 /* 180000 uV */
#define VDD_3V0 3000000 /* 300000 uV */
#define VDD_165_195 (ffs(MMC_VDD_165_195) - 1)
/*
* One controller can have multiple slots, like on some omap boards using
* omap.c controller driver. Luckily this is not currently done on any known
@ -164,6 +168,8 @@ struct omap_hsmmc_host {
*/
struct regulator *vcc;
struct regulator *vcc_aux;
struct regulator *pbias;
bool pbias_enabled;
int pbias_disable;
void __iomem *base;
resource_size_t mapbase;
@ -277,6 +283,15 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
if (mmc_slot(host).before_set_reg)
mmc_slot(host).before_set_reg(dev, slot, power_on, vdd);
if (host->pbias) {
if (host->pbias_enabled == 1) {
ret = regulator_disable(host->pbias);
if (!ret)
host->pbias_enabled = 0;
}
regulator_set_voltage(host->pbias, VDD_3V0, VDD_3V0);
}
/*
* Assume Vcc regulator is used only to power the card ... OMAP
* VDDS is used to power the pins, optionally with a transceiver to
@ -311,9 +326,27 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
}
}
if (host->pbias) {
if (vdd <= VDD_165_195)
ret = regulator_set_voltage(host->pbias, VDD_1V8,
VDD_1V8);
else
ret = regulator_set_voltage(host->pbias, VDD_3V0,
VDD_3V0);
if (ret < 0)
goto error_set_power;
if (host->pbias_enabled == 0) {
ret = regulator_enable(host->pbias);
if (!ret)
host->pbias_enabled = 1;
}
}
if (mmc_slot(host).after_set_reg)
mmc_slot(host).after_set_reg(dev, slot, power_on, vdd);
error_set_power:
return ret;
}
@ -347,6 +380,9 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
reg = devm_regulator_get_optional(host->dev, "vmmc_aux");
host->vcc_aux = IS_ERR(reg) ? NULL : reg;
reg = devm_regulator_get_optional(host->dev, "pbias");
host->pbias = IS_ERR(reg) ? NULL : reg;
/* For eMMC do not power off when not in sleep state */
if (mmc_slot(host).no_regulator_off_init)
return 0;
@ -1831,6 +1867,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
host->base = ioremap(host->mapbase, SZ_4K);
host->power_mode = MMC_POWER_OFF;
host->next_data.cookie = 1;
host->pbias_enabled = 0;
platform_set_drvdata(pdev, host);