mmc: sdhci-pxav3: dt: Support "cd-gpios" property
Tested on OLPC XO-4/MMP3, where the card detection pin for one of
the controllers is a sideband GPIO. The third cell in the cd-gpios
property controls whether the GPIO is active high/active low.
(Also, pass host_caps2 through from platdata to the mmc host.)
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
[kliu5@marvell.com: Compile fix]
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
index a553b18..c5ff124 100644
--- a/drivers/mmc/host/sdhci-pxav3.c
+++ b/drivers/mmc/host/sdhci-pxav3.c
@@ -24,12 +24,14 @@
#include <linux/gpio.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/slot-gpio.h>
#include <linux/platform_data/pxa_sdhci.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/of_gpio.h>
#include "sdhci.h"
#include "sdhci-pltfm.h"
@@ -182,6 +184,7 @@
struct device_node *np = dev->of_node;
u32 bus_width;
u32 clk_delay_cycles;
+ enum of_gpio_flags gpio_flags;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
@@ -198,6 +201,10 @@
if (clk_delay_cycles > 0)
pdata->clk_delay_cycles = clk_delay_cycles;
+ pdata->ext_cd_gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &gpio_flags);
+ if (gpio_flags != OF_GPIO_ACTIVE_LOW)
+ pdata->host_caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
+
return pdata;
}
#else
@@ -266,8 +273,19 @@
host->quirks |= pdata->quirks;
if (pdata->host_caps)
host->mmc->caps |= pdata->host_caps;
+ if (pdata->host_caps2)
+ host->mmc->caps2 |= pdata->host_caps2;
if (pdata->pm_caps)
host->mmc->pm_caps |= pdata->pm_caps;
+
+ if (gpio_is_valid(pdata->ext_cd_gpio)) {
+ ret = mmc_gpio_request_cd(host->mmc, pdata->ext_cd_gpio);
+ if (ret) {
+ dev_err(mmc_dev(host->mmc),
+ "failed to allocate card detect gpio\n");
+ goto err_cd_req;
+ }
+ }
}
host->ops = &pxav3_sdhci_ops;
@@ -285,6 +303,8 @@
err_add_host:
clk_disable_unprepare(clk);
clk_put(clk);
+ mmc_gpio_free_cd(host->mmc);
+err_cd_req:
err_clk_get:
sdhci_pltfm_free(pdev);
kfree(pxa);
@@ -296,11 +316,16 @@
struct sdhci_host *host = platform_get_drvdata(pdev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_pxa *pxa = pltfm_host->priv;
+ struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data;
sdhci_remove_host(host, 1);
clk_disable_unprepare(pltfm_host->clk);
clk_put(pltfm_host->clk);
+
+ if (gpio_is_valid(pdata->ext_cd_gpio))
+ mmc_gpio_free_cd(host->mmc);
+
sdhci_pltfm_free(pdev);
kfree(pxa);