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authorShawn Guo <shawn.guo@linaro.org>2011-06-21 22:41:51 +0800
committerShawn Guo <shawn.guo@linaro.org>2011-07-27 09:31:14 +0800
commit913413c307c919f8b21edccea23a9fd9d9d49a64 (patch)
treef36a4cf7e1f2111d4bdf14253476d115b5110f1f /arch/arm/plat-mxc
parentca2cc333920690db87a03c2ee3bd6f43adb3e7fb (diff)
downloadop-kernel-dev-913413c307c919f8b21edccea23a9fd9d9d49a64.zip
op-kernel-dev-913413c307c919f8b21edccea23a9fd9d9d49a64.tar.gz
mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5
The patch extends card_detect and write_protect support to get mx5 family and more scenarios supported. The changes include: * Turn platform_data from optional to mandatory * Add cd_types and wp_types into platform_data to cover more use cases * Remove the use of flag ESDHC_FLAG_GPIO_FOR_CD * Adjust some machine codes to adopt the platform_data changes * Work around the issue that software reset will get card detection circuit stop working With this patch, card_detect and write_protect gets supported on mx5 based platforms. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: Chris Ball <cjb@laptop.org> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Arnaud Patard <arnaud.patard@rtp-net.org> Acked-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'arch/arm/plat-mxc')
-rw-r--r--arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c12
-rw-r--r--arch/arm/plat-mxc/include/mach/esdhc.h25
2 files changed, 33 insertions, 4 deletions
diff --git a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
index 6b2940b..79d6d71 100644
--- a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
+++ b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
@@ -65,6 +65,11 @@ imx53_sdhci_esdhc_imx_data[] __initconst = {
};
#endif /* ifdef CONFIG_SOC_IMX53 */
+static const struct esdhc_platform_data default_esdhc_pdata __initconst = {
+ .wp_type = ESDHC_WP_NONE,
+ .cd_type = ESDHC_CD_NONE,
+};
+
struct platform_device *__init imx_add_sdhci_esdhc_imx(
const struct imx_sdhci_esdhc_imx_data *data,
const struct esdhc_platform_data *pdata)
@@ -81,6 +86,13 @@ struct platform_device *__init imx_add_sdhci_esdhc_imx(
},
};
+ /*
+ * If machine does not provide pdata, use the default one
+ * which means no WP/CD support
+ */
+ if (!pdata)
+ pdata = &default_esdhc_pdata;
+
return imx_add_platform_device("sdhci-esdhc-imx", data->id, res,
ARRAY_SIZE(res), pdata, sizeof(*pdata));
}
diff --git a/arch/arm/plat-mxc/include/mach/esdhc.h b/arch/arm/plat-mxc/include/mach/esdhc.h
index 86003f4..aaf9748 100644
--- a/arch/arm/plat-mxc/include/mach/esdhc.h
+++ b/arch/arm/plat-mxc/include/mach/esdhc.h
@@ -10,17 +10,34 @@
#ifndef __ASM_ARCH_IMX_ESDHC_H
#define __ASM_ARCH_IMX_ESDHC_H
+enum wp_types {
+ ESDHC_WP_NONE, /* no WP, neither controller nor gpio */
+ ESDHC_WP_CONTROLLER, /* mmc controller internal WP */
+ ESDHC_WP_GPIO, /* external gpio pin for WP */
+};
+
+enum cd_types {
+ ESDHC_CD_NONE, /* no CD, neither controller nor gpio */
+ ESDHC_CD_CONTROLLER, /* mmc controller internal CD */
+ ESDHC_CD_GPIO, /* external gpio pin for CD */
+ ESDHC_CD_PERMANENT, /* no CD, card permanently wired to host */
+};
+
/**
- * struct esdhc_platform_data - optional platform data for esdhc on i.MX
+ * struct esdhc_platform_data - platform data for esdhc on i.MX
*
- * strongly recommended for i.MX25/35, not needed for other variants
+ * ESDHC_WP(CD)_CONTROLLER type is not available on i.MX25/35.
*
- * @wp_gpio: gpio for write_protect (-EINVAL if unused)
- * @cd_gpio: gpio for card_detect interrupt (-EINVAL if unused)
+ * @wp_gpio: gpio for write_protect
+ * @cd_gpio: gpio for card_detect interrupt
+ * @wp_type: type of write_protect method (see wp_types enum above)
+ * @cd_type: type of card_detect method (see cd_types enum above)
*/
struct esdhc_platform_data {
unsigned int wp_gpio;
unsigned int cd_gpio;
+ enum wp_types wp_type;
+ enum cd_types cd_type;
};
#endif /* __ASM_ARCH_IMX_ESDHC_H */
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