mmc: tmio: add regulator support

Currently the TMIO MMC driver derives the OCR mask from the platform data
and uses a platform callback to turn card power on and off. This patch adds
regulator support to the driver.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index c6c0334..b5c32b4 100644 (file)
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -768,6 +768,18 @@ static int tmio_mmc_clk_update(struct mmc_host *mmc)
        return ret;
 }
 
+static void tmio_mmc_set_power(struct tmio_mmc_host *host, struct mmc_ios *ios)
+{
+       struct mmc_host *mmc = host->mmc;
+
+       if (host->set_pwr)
+               host->set_pwr(host->pdev, ios->power_mode != MMC_POWER_OFF);
+       if (!IS_ERR(mmc->supply.vmmc))
+               /* Errors ignored... */
+               mmc_regulator_set_ocr(mmc, mmc->supply.vmmc,
+                                     ios->power_mode ? ios->vdd : 0);
+}
+
 /* Set MMC clock / power.
  * Note: This controller uses a simple divider scheme therefore it cannot
  * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
@@ -820,13 +832,12 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                }
                tmio_mmc_set_clock(host, ios->clock);
                /* power up SD bus */
-               if (host->set_pwr)
-                       host->set_pwr(host->pdev, 1);
+               tmio_mmc_set_power(host, ios);
                /* start bus clock */
                tmio_mmc_clk_start(host);
        } else if (ios->power_mode != MMC_POWER_UP) {
-               if (host->set_pwr && ios->power_mode == MMC_POWER_OFF)
-                       host->set_pwr(host->pdev, 0);
+               if (ios->power_mode == MMC_POWER_OFF)
+                       tmio_mmc_set_power(host, ios);
                if (host->power) {
                        struct tmio_mmc_data *pdata = host->pdata;
                        tmio_mmc_clk_stop(host);
@@ -888,6 +899,19 @@ static const struct mmc_host_ops tmio_mmc_ops = {
        .enable_sdio_irq = tmio_mmc_enable_sdio_irq,
 };
 
+static void tmio_mmc_init_ocr(struct tmio_mmc_host *host)
+{
+       struct tmio_mmc_data *pdata = host->pdata;
+       struct mmc_host *mmc = host->mmc;
+
+       mmc_regulator_get_supply(mmc);
+
+       if (!mmc->ocr_avail)
+               mmc->ocr_avail = pdata->ocr_mask ? : MMC_VDD_32_33 | MMC_VDD_33_34;
+       else if (pdata->ocr_mask)
+               dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n");
+}
+
 int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
                                  struct platform_device *pdev,
                                  struct tmio_mmc_data *pdata)
@@ -933,10 +957,7 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
                mmc->max_segs;
        mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
        mmc->max_seg_size = mmc->max_req_size;
-       if (pdata->ocr_mask)
-               mmc->ocr_avail = pdata->ocr_mask;
-       else
-               mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
+       tmio_mmc_init_ocr(_host);
 
        _host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD ||
                                  mmc->caps & MMC_CAP_NEEDS_POLL ||