ARM: OMAP2: HSMMC: explicit fields to declare cover/card detect pin

board-rx51 has no card detect pin in the mmc slot, but can detect that
the (cell-phone) cover has been removed and the card is accessible.
The semantics between cover/card detect differ, the gpio on the slot
informs you after the card has been removed, cover removal does not
necessarily mean that the card has been removed.
This means different code paths are necessary. To complete this we
also want different fields in the platform data for cover and card
detect. This separation is not pushed all the way down into struct
omap2_hsmmc_info which is used to initialize the platform data.
If we did that we had to go over all board files and set the new
gpio_cod pin to -EINVAL. If we forget one board or some out-of-tree
archicture forgets that the default '0' is used which is a valid pin
number.

Signed-off-by: Andreas Fenkart <afenkart@gmail.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index dc6e79c4484abbfb097abb322298c37a8b9dd5ca..9a8611ab5dfa60d3bf5e23d6118779db3495ee80 100644 (file)
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -150,9 +150,13 @@ static int nop_mmc_set_power(struct device *dev, int power_on, int vdd)
 static inline void omap_hsmmc_mux(struct omap_hsmmc_platform_data
                                  *mmc_controller, int controller_nr)
 {
-       if (gpio_is_valid(mmc_controller->switch_pin) &&
-           (mmc_controller->switch_pin < OMAP_MAX_GPIO_LINES))
-               omap_mux_init_gpio(mmc_controller->switch_pin,
+       if (gpio_is_valid(mmc_controller->gpio_cd) &&
+           (mmc_controller->gpio_cd < OMAP_MAX_GPIO_LINES))
+               omap_mux_init_gpio(mmc_controller->gpio_cd,
+                                  OMAP_PIN_INPUT_PULLUP);
+       if (gpio_is_valid(mmc_controller->gpio_cod) &&
+           (mmc_controller->gpio_cod < OMAP_MAX_GPIO_LINES))
+               omap_mux_init_gpio(mmc_controller->gpio_cod,
                                   OMAP_PIN_INPUT_PULLUP);
        if (gpio_is_valid(mmc_controller->gpio_wp) &&
            (mmc_controller->gpio_wp < OMAP_MAX_GPIO_LINES))
@@ -250,15 +254,20 @@ static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
        mmc->internal_clock = !c->ext_clock;
        mmc->reg_offset = 0;
 
-       mmc->switch_pin = c->gpio_cd;
+       if (c->cover_only) {
+               /* detect if mobile phone cover removed */
+               mmc->gpio_cd = -EINVAL;
+               mmc->gpio_cod = c->gpio_cd;
+       } else {
+               /* card detect pin on the mmc socket itself */
+               mmc->gpio_cd = c->gpio_cd;
+               mmc->gpio_cod = -EINVAL;
+       }
        mmc->gpio_wp = c->gpio_wp;
 
        mmc->remux = c->remux;
        mmc->init_card = c->init_card;
 
-       if (c->cover_only)
-               mmc->cover = 1;
-
        if (c->nonremovable)
                mmc->nonremovable = 1;
 
@@ -358,7 +367,15 @@ void omap_hsmmc_late_init(struct omap2_hsmmc_info *c)
                if (!mmc_pdata)
                        continue;
 
-               mmc_pdata->switch_pin = c->gpio_cd;
+               if (c->cover_only) {
+                       /* detect if mobile phone cover removed */
+                       mmc_pdata->gpio_cd = -EINVAL;
+                       mmc_pdata->gpio_cod = c->gpio_cd;
+               } else {
+                       /* card detect pin on the mmc socket itself */
+                       mmc_pdata->gpio_cd = c->gpio_cd;
+                       mmc_pdata->gpio_cod = -EINVAL;
+               }
                mmc_pdata->gpio_wp = c->gpio_wp;
 
                res = omap_device_register(pdev);

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 833143f8145107084c71288a60cc5b6c8883872f..08d537797b13e843534f9d000d554f307411d7ae 100644 (file)
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -427,15 +427,15 @@ static int omap_hsmmc_gpio_init(struct mmc_host *mmc,
 {
        int ret;
 
-       if (pdata->cover && gpio_is_valid(pdata->switch_pin)) {
-               ret = mmc_gpio_request_cd(mmc, pdata->switch_pin, 0);
+       if (gpio_is_valid(pdata->gpio_cod)) {
+               ret = mmc_gpio_request_cd(mmc, pdata->gpio_cod, 0);
                if (ret)
                        return ret;
 
                host->get_cover_state = omap_hsmmc_get_cover_state;
                mmc_gpio_set_cd_isr(mmc, omap_hsmmc_cover_irq);
-       } else if (!pdata->cover && gpio_is_valid(pdata->switch_pin)) {
-               ret = mmc_gpio_request_cd(mmc, pdata->switch_pin, 0);
+       } else if (gpio_is_valid(pdata->gpio_cd)) {
+               ret = mmc_gpio_request_cd(mmc, pdata->gpio_cd, 0);
                if (ret)
                        return ret;
 
@@ -1920,7 +1920,8 @@ static struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
        if (of_find_property(np, "ti,dual-volt", NULL))
                pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT;
 
-       pdata->switch_pin = -EINVAL;
+       pdata->gpio_cd = -EINVAL;
+       pdata->gpio_cod = -EINVAL;
        pdata->gpio_wp = -EINVAL;
 
        if (of_find_property(np, "ti,non-removable", NULL)) {

diff --git a/include/linux/platform_data/hsmmc-omap.h b/include/linux/platform_data/hsmmc-omap.h
index 67bbcf0785f61da1d4a832e016de1cb99dd313a9..8e981be2e2c2ee8c0472e7824300a6178b474640 100644 (file)
--- a/include/linux/platform_data/hsmmc-omap.h
+++ b/include/linux/platform_data/hsmmc-omap.h
@@ -55,9 +55,6 @@ struct omap_hsmmc_platform_data {
        u32 caps;       /* Used for the MMC driver on 2430 and later */
        u32 pm_caps;    /* PM capabilities of the mmc */
 
-       /* switch pin can be for card detect (default) or card cover */
-       unsigned cover:1;
-
        /* use the internal clock */
        unsigned internal_clock:1;
 
@@ -73,7 +70,8 @@ struct omap_hsmmc_platform_data {
 #define HSMMC_HAS_HSPE_SUPPORT (1 << 2)
        unsigned features;
 
-       int switch_pin;                 /* gpio (card detect) */
+       int gpio_cd;                    /* gpio (card detect) */
+       int gpio_cod;                   /* gpio (cover detect) */
        int gpio_wp;                    /* gpio (write protect) */
 
        int (*set_power)(struct device *dev, int power_on, int vdd);