On some omaps we need to remux MMC pins for PM, and for some omaps
we need to remux the SDIO IRQ pin.
Based on an earlier patch by Andreas Fenkart <afenk...@gmail.com>.
Cc: Andreas Fenkart <afenk...@gmail.com>
Cc: Balaji T K <balaj...@ti.com>
Cc: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Tony Lindgren <t...@atomide.com>
---
drivers/mmc/host/omap_hsmmc.c | 93 +++++++++++++++++++++++++++++++++++++----
1 file changed, 84 insertions(+), 9 deletions(-)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 7e28501..8ca08fb 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -185,6 +185,8 @@ struct omap_hsmmc_host {
int req_in_progress;
struct omap_hsmmc_next next_data;
bool sdio_irq_en;
+ struct pinctrl *pinctrl;
+ struct pinctrl_state *fixed, *active, *idle;
bool active_pinmux;
struct omap_mmc_platform_data *pdata;
};
@@ -473,6 +475,67 @@ static void omap_hsmmc_gpio_free(struct
omap_mmc_platform_data *pdata)
gpio_free(pdata->slots[0].gpio_cirq);
}
+static int omap_hsmmc_pin_init(struct omap_hsmmc_host *host)
+{
+ int ret;
+
+ host->pinctrl = devm_pinctrl_get(host->dev);
+ if (IS_ERR(host->pinctrl)) {
+ dev_dbg(host->dev, "no pinctrl handle\n");
+ ret = 0;
+ goto out;
+ }
+
+ host->fixed = pinctrl_lookup_state(host->pinctrl,
+ PINCTRL_STATE_DEFAULT);
+ if (IS_ERR(host->fixed)) {
+ dev_dbg(host->dev,
+ "pins are not configured from the driver\n");
+ host->fixed = NULL;
+ ret = 0;
+ goto out;
+ }
+
+ ret = pinctrl_select_state(host->pinctrl, host->fixed);
+ if (ret < 0)
+ goto err;
+
+ /* For most cases we don't have wake-ups, and exit after this */
+ host->active = pinctrl_lookup_state(host->pinctrl, "active");
+ if (IS_ERR(host->active)) {
+ ret = PTR_ERR(host->active);
+ host->active = NULL;
+ return 0;
+ }
+
+ host->idle = pinctrl_lookup_state(host->pinctrl,
+ PINCTRL_STATE_IDLE);
+ if (IS_ERR(host->idle)) {
+ ret = PTR_ERR(host->idle);
+ host->idle = NULL;
+ goto err;
+ }
+
+ /* Let's make sure the active and idle states work */
+ ret = pinctrl_select_state(host->pinctrl, host->idle);
+ if (ret < 0)
+ goto err;
+
+ ret = pinctrl_select_state(host->pinctrl, host->active);
+ if (ret < 0)
+ goto err;
+
+ dev_info(mmc_dev(host->mmc), "pins configured for wake-up events\n");
+
+ return 0;
+
+err:
+ dev_err(mmc_dev(host->mmc), "pins configuration error: %i\n", ret);
+
+out:
+ return ret;
+}
+
/*
* Start clock to the card
*/
@@ -1854,7 +1917,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
const struct of_device_id *match;
dma_cap_mask_t mask;
unsigned tx_req, rx_req;
- struct pinctrl *pinctrl;
match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev);
if (match) {
@@ -2086,21 +2148,19 @@ static int omap_hsmmc_probe(struct platform_device
*pdev)
omap_hsmmc_disable_irq(host);
- pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
- if (IS_ERR(pinctrl))
- dev_warn(&pdev->dev,
- "pins are not configured from the driver\n");
-
/*
- * For now, only support SDIO interrupt if we are doing
- * muxing of dat1 when booted with DT. This is because the
+ * For now, only support SDIO interrupt if we are doing dynamic
+ * remuxing of dat1 when booted with DT. This is because the
* supposedly the wake-up events for CTPL don't work from deeper
* idle states. And we don't want to add new legacy mux platform
* init code callbacks any longer as we are moving to DT based
* booting anyways.
*/
if (match) {
- if (!IS_ERR(pinctrl) && mmc_slot(host).sdio_irq)
+ ret = omap_hsmmc_pin_init(host);
+ if (ret)
+ goto err_pinctrl_state;
+ else if (host->idle && mmc_slot(host).sdio_irq)
mmc->caps |= MMC_CAP_SDIO_IRQ;
}
@@ -2128,6 +2188,8 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
err_slot_name:
mmc_remove_host(mmc);
+err_pinctrl_state:
+ devm_pinctrl_put(host->pinctrl);
if ((mmc_slot(host).sdio_irq))
free_irq(mmc_slot(host).sdio_irq, host);
err_irq_sdio:
@@ -2185,6 +2247,7 @@ static int omap_hsmmc_remove(struct platform_device *pdev)
dma_release_channel(host->tx_chan);
if (host->rx_chan)
dma_release_channel(host->rx_chan);
+ devm_pinctrl_put(host->pinctrl);
pm_runtime_put_sync(host->dev);
pm_runtime_disable(host->dev);
@@ -2320,6 +2383,12 @@ static int omap_hsmmc_runtime_suspend(struct device *dev)
OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
spin_unlock_irqrestore(&host->irq_lock, flags);
+ if (host->pinctrl && host->idle) {
+ ret = pinctrl_select_state(host->pinctrl, host->idle);
+ if (ret < 0)
+ dev_warn(mmc_dev(host->mmc), "Unable to select
idle pinmux\n");
+ }
+
if (mmc_slot(host).sdio_irq)
enable_irq(mmc_slot(host).sdio_irq);
}
@@ -2343,6 +2412,12 @@ static int omap_hsmmc_runtime_resume(struct device *dev)
if (mmc_slot(host).sdio_irq)
disable_irq(mmc_slot(host).sdio_irq);
+ if (host->pinctrl && host->active) {
+ ret = pinctrl_select_state(host->pinctrl, host->active);
+ if (ret < 0)
+ dev_warn(mmc_dev(host->mmc), "Unable to select
active pinmux\n");
+ }
+
spin_lock_irqsave(&host->irq_lock, flags);
host->active_pinmux = true;
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
