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mmc: mxcmmc: Allow binding a regulator to manage the MMC card voltage

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This implementation is based on the pxamci.c driver and it will
be used to support the mx31_3ds machine.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Alberto Panizzo 2010-11-02 01:05:37 +01:00 committed by Chris Ball
parent 930e2fe759
commit 74b66954eb
1 changed files with 42 additions and 6 deletions
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48
drivers/mmc/host/mxcmmc.c
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@ -31,6 +31,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <asm/dma.h>
#include <asm/irq.h>
@ -141,10 +142,45 @@ struct mxcmci_host {
struct work_struct datawork;
spinlock_t lock;
struct regulator *vcc;
};
static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios);
static inline void mxcmci_init_ocr(struct mxcmci_host *host)
{
#ifdef CONFIG_REGULATOR
host->vcc = regulator_get(mmc_dev(host->mmc), "vmmc");
if (IS_ERR(host->vcc)) {
host->vcc = NULL;
} else {
host->mmc->ocr_avail = mmc_regulator_get_ocrmask(host->vcc);
if (host->pdata && host->pdata->ocr_avail)
dev_warn(mmc_dev(host->mmc),
"pdata->ocr_avail will not be used\n");
}
#endif
if (host->vcc == NULL) {
/* fall-back to platform data */
if (host->pdata && host->pdata->ocr_avail)
host->mmc->ocr_avail = host->pdata->ocr_avail;
else
host->mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
}
}
static inline void mxcmci_set_power(struct mxcmci_host *host, unsigned int vdd)
{
#ifdef CONFIG_REGULATOR
if (host->vcc)
mmc_regulator_set_ocr(host->vcc, vdd);
#endif
if (host->pdata && host->pdata->setpower)
host->pdata->setpower(mmc_dev(host->mmc), vdd);
}
static inline int mxcmci_use_dma(struct mxcmci_host *host)
{
return host->do_dma;
@ -680,9 +716,9 @@ static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4;
if (host->power_mode != ios->power_mode) {
if (host->pdata && host->pdata->setpower)
host->pdata->setpower(mmc_dev(mmc), ios->vdd);
mxcmci_set_power(host, ios->vdd);
host->power_mode = ios->power_mode;
if (ios->power_mode == MMC_POWER_ON)
host->cmdat |= CMD_DAT_CONT_INIT;
}
@ -807,10 +843,7 @@ static int mxcmci_probe(struct platform_device *pdev)
host->pdata = pdev->dev.platform_data;
spin_lock_init(&host->lock);
if (host->pdata && host->pdata->ocr_avail)
mmc->ocr_avail = host->pdata->ocr_avail;
else
mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
mxcmci_init_ocr(host);
if (host->pdata && host->pdata->dat3_card_detect)
host->default_irq_mask =
@ -915,6 +948,9 @@ static int mxcmci_remove(struct platform_device *pdev)
mmc_remove_host(mmc);
if (host->vcc)
regulator_put(host->vcc);
if (host->pdata && host->pdata->exit)
host->pdata->exit(&pdev->dev, mmc);