diff options
| author | Abhilash Kesavan <a.kesavan@samsung.com> | 2012-11-19 10:26:21 +0530 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-12-06 13:54:54 -0500 |
| commit | ab269128a2cff7abee06f023e6466fc29991738c (patch) | |
| tree | b6b75ebec2cad581d36a0bfc0ed9ad7e19f9e711 | |
| parent | f5ccfd4174639119664b6d76495ea1388f13b838 (diff) | |
mmc: dw_mmc: Add sdio power bindings
Add dt-based retrieval of host sdio pm capabilities. Based on
the dt based discovery do a bus init in the resume function.
Signed-off-by: Olof Johansson <olofj@chromium.org>
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 20 | ||||
| -rw-r--r-- | include/linux/mmc/dw_mmc.h | 1 |
2 files changed, 18 insertions, 3 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 5b4134811c90..73420296b268 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -617,13 +617,13 @@ static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) cmd, arg, cmd_status); } -static void dw_mci_setup_bus(struct dw_mci_slot *slot) +static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) { struct dw_mci *host = slot->host; u32 div; u32 clk_en_a; - if (slot->clock != host->current_speed) { + if (slot->clock != host->current_speed || force_clkinit) { div = host->bus_hz / slot->clock; if (host->bus_hz % slot->clock && host->bus_hz > slot->clock) /* @@ -684,7 +684,7 @@ static void __dw_mci_start_request(struct dw_mci *host, host->pdata->select_slot(slot->id); /* Slot specific timing and width adjustment */ - dw_mci_setup_bus(slot); + dw_mci_setup_bus(slot, false); host->cur_slot = slot; host->mrq = mrq; @@ -1850,6 +1850,9 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) if (host->pdata->caps) mmc->caps = host->pdata->caps; + if (host->pdata->pm_caps) + mmc->pm_caps = host->pdata->pm_caps; + if (host->dev->of_node) { ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); if (ctrl_id < 0) @@ -2072,6 +2075,12 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) return ERR_PTR(ret); } + if (of_find_property(np, "keep-power-in-suspend", NULL)) + pdata->pm_caps |= MMC_PM_KEEP_POWER; + + if (of_find_property(np, "enable-sdio-wakeup", NULL)) + pdata->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; + return pdata; } @@ -2411,6 +2420,11 @@ int dw_mci_resume(struct dw_mci *host) struct dw_mci_slot *slot = host->slot[i]; if (!slot) continue; + if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER) { + dw_mci_set_ios(slot->mmc, &slot->mmc->ios); + dw_mci_setup_bus(slot, true); + } + ret = mmc_resume_host(host->slot[i]->mmc); if (ret < 0) return ret; diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h index a5498dce1cb5..34be4f47293c 100644 --- a/include/linux/mmc/dw_mmc.h +++ b/include/linux/mmc/dw_mmc.h @@ -231,6 +231,7 @@ struct dw_mci_board { u32 caps; /* Capabilities */ u32 caps2; /* More capabilities */ + u32 pm_caps; /* PM capabilities */ /* * Override fifo depth. If 0, autodetect it from the FIFOTH register, * but note that this may not be reliable after a bootloader has used |