wlcore_sdio/wl18xx: use SDIO revision number to identify wl18xx chips

At least in PG1, the wl18xx chips use the same SDIO vendor/device ID,
so it's not possible to figure out which driver is to be used.  As a
workaround, we can check the SDIO revision number, because wl18xx uses
3.00 and wl12xx does not.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>

diff --git a/drivers/net/wireless/ti/wlcore/sdio.c b/drivers/net/wireless/ti/wlcore/sdio.c
index 0a72347..1082e39 100644 (file)
--- a/drivers/net/wireless/ti/wlcore/sdio.c
+++ b/drivers/net/wireless/ti/wlcore/sdio.c
@@ -25,6 +25,7 @@
 #include <linux/module.h>
 #include <linux/vmalloc.h>
 #include <linux/platform_device.h>
+#include <linux/mmc/sdio.h>
 #include <linux/mmc/sdio_func.h>
 #include <linux/mmc/sdio_ids.h>
 #include <linux/mmc/card.h>
@@ -196,6 +197,7 @@ static int __devinit wl1271_probe(struct sdio_func *func,
        struct resource res[1];
        mmc_pm_flag_t mmcflags;
        int ret = -ENOMEM;
+       const char *chip_family;
 
        /* We are only able to handle the wlan function */
        if (func->num != 0x02)
@@ -236,7 +238,18 @@ static int __devinit wl1271_probe(struct sdio_func *func,
        /* Tell PM core that we don't need the card to be powered now */
        pm_runtime_put_noidle(&func->dev);
 
-       glue->core = platform_device_alloc("wl12xx", -1);
+       /*
+        * Due to a hardware bug, we can't differentiate wl18xx from
+        * wl12xx, because both report the same device ID.  The only
+        * way to differentiate is by checking the SDIO revision,
+        * which is 3.00 on the wl18xx chips.
+        */
+       if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00)
+               chip_family = "wl18xx";
+       else
+               chip_family = "wl12xx";
+
+       glue->core = platform_device_alloc(chip_family, -1);
        if (!glue->core) {
                dev_err(glue->dev, "can't allocate platform_device");
                ret = -ENOMEM;