diff options
| author | Chris Ball <cjb@laptop.org> | 2012-09-19 10:29:12 +0200 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-09-19 10:29:12 +0200 |
| commit | 8f63795c60ef5bc3dbfcbf19c1ac64ed79d23c62 (patch) | |
| tree | 073d48dd496caf00a35ab7030458288081ed4735 /drivers/mmc | |
| parent | mmc: slot-gpio: Fix missing assignment to ctx->ro_gpio (diff) | |
| download | linux-8f63795c60ef5bc3dbfcbf19c1ac64ed79d23c62.tar.xz linux-8f63795c60ef5bc3dbfcbf19c1ac64ed79d23c62.zip | |
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>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-pxav3.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c index a553b180d340..c5ff124f8f60 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 @@ static struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev) 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 @@ static struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev) 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 @@ static int __devinit sdhci_pxav3_probe(struct platform_device *pdev) 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 @@ static int __devinit sdhci_pxav3_probe(struct platform_device *pdev) 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 @@ static int __devexit sdhci_pxav3_remove(struct platform_device *pdev) 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); |