pxamci: add regulator support.

Changes pxamci.c to use the regulator subsystem. Uses the regulator case
CONFIG_REGULATOR is defined and a matching is regulator is provided, or
falls back to pdata->setpower otherwise. A warning is displayed case
both a valid regulator and pdata is set, and the regulator is used.

Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

1 files changed, 41 insertions, 5 deletions

diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index 430095725f9f..d7d7109ef47e 100644
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -27,6 +27,7 @@
 #include <linux/err.h>
 #include <linux/mmc/host.h>
 #include <linux/io.h>
+#include <linux/regulator/consumer.h>
 
 #include <asm/sizes.h>
 
@@ -67,8 +68,42 @@ struct pxamci_host {
         unsigned int            dma_dir;
         unsigned int            dma_drcmrrx;
         unsigned int            dma_drcmrtx;
+
+        struct regulator        *vcc;
 };
 
+static inline void pxamci_init_ocr(struct pxamci_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_mask)
+                        dev_warn(mmc_dev(host->mmc),
+                                "ocr_mask/setpower will not be used\n");
+        }
+#endif
+        if (host->vcc == NULL) {
+                /* fall-back to platform data */
+                host->mmc->ocr_avail = host->pdata ?
+                        host->pdata->ocr_mask :
+                        MMC_VDD_32_33 | MMC_VDD_33_34;
+        }
+}
+
+static inline void pxamci_set_power(struct pxamci_host *host, unsigned int vdd)
+{
+#ifdef CONFIG_REGULATOR
+        if (host->vcc)
+                mmc_regulator_set_ocr(host->vcc, vdd);
+#endif
+        if (!host->vcc && host->pdata && host->pdata->setpower)
+                host->pdata->setpower(mmc_dev(host->mmc), vdd);
+}
+
 static void pxamci_stop_clock(struct pxamci_host *host)
 {
         if (readl(host->base + MMC_STAT) & STAT_CLK_EN) {
@@ -438,8 +473,7 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
         if (host->power_mode != ios->power_mode) {
                 host->power_mode = ios->power_mode;
 
-                if (host->pdata && host->pdata->setpower)
-                        host->pdata->setpower(mmc_dev(mmc), ios->vdd);
+                pxamci_set_power(host, ios->vdd);
 
                 if (ios->power_mode == MMC_POWER_ON)
                         host->cmdat |= CMDAT_INIT;
@@ -562,9 +596,8 @@ static int pxamci_probe(struct platform_device *pdev)
         mmc->f_max = (cpu_is_pxa300() || cpu_is_pxa310()) ? 26000000
                                                           : host->clkrate;
 
-        mmc->ocr_avail = host->pdata ?
-                         host->pdata->ocr_mask :
-                         MMC_VDD_32_33|MMC_VDD_33_34;
+        pxamci_init_ocr(host);
+
         mmc->caps = 0;
         host->cmdat = 0;
         if (!cpu_is_pxa25x()) {
@@ -661,6 +694,9 @@ static int pxamci_remove(struct platform_device *pdev)
         if (mmc) {
                 struct pxamci_host *host = mmc_priv(mmc);
 
+                if (host->vcc)
+                        regulator_put(host->vcc);
+
                 if (host->pdata && host->pdata->exit)
                         host->pdata->exit(&pdev->dev, mmc);