ssb: register serial flash as platform device

This allows writing MTD driver working as a platform driver. In
platform_data it will receive struct ssb_sflash, which contains all
important data about flash (window, size).

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 31 insertions, 0 deletions

diff --git a/drivers/ssb/driver_chipcommon_sflash.c b/drivers/ssb/driver_chipcommon_sflash.c
index 205f1c499c46..e84cf04f4416 100644
--- a/drivers/ssb/driver_chipcommon_sflash.c
+++ b/drivers/ssb/driver_chipcommon_sflash.c
@@ -9,6 +9,19 @@
 
 #include "ssb_private.h"
 
+static struct resource ssb_sflash_resource = {
+        .name   = "ssb_sflash",
+        .start  = SSB_FLASH2,
+        .end    = 0,
+        .flags  = IORESOURCE_MEM | IORESOURCE_READONLY,
+};
+
+struct platform_device ssb_sflash_dev = {
+        .name           = "ssb_sflash",
+        .resource       = &ssb_sflash_resource,
+        .num_resources  = 1,
+};
+
 struct ssb_sflash_tbl_e {
         char *name;
         u32 id;
@@ -141,6 +154,12 @@ int ssb_sflash_init(struct ssb_chipcommon *cc)
         pr_info("Found %s serial flash (blocksize: 0x%X, blocks: %d)\n",
                 e->name, e->blocksize, e->numblocks);
 
+        /* Prepare platform device, but don't register it yet. It's too early,
+         * malloc (required by device_private_init) is not available yet. */
+        ssb_sflash_dev.resource[0].end = ssb_sflash_dev.resource[0].start +
+                                         sflash->size;
+        ssb_sflash_dev.dev.platform_data = sflash;
+
         pr_err("Serial flash support is not implemented yet!\n");
 
         return -ENOTSUPP;
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index 812775a4bfb6..e55ddf7cd7c2 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -553,6 +553,14 @@ static int ssb_devices_register(struct ssb_bus *bus)
         }
 #endif
 
+#ifdef CONFIG_SSB_SFLASH
+        if (bus->mipscore.sflash.present) {
+                err = platform_device_register(&ssb_sflash_dev);
+                if (err)
+                        pr_err("Error registering serial flash\n");
+        }
+#endif
+
         return 0;
 error:
         /* Unwind the already registered devices. */
diff --git a/drivers/ssb/ssb_private.h b/drivers/ssb/ssb_private.h
index 4671f17f09af..eb507a50a564 100644
--- a/drivers/ssb/ssb_private.h
+++ b/drivers/ssb/ssb_private.h
@@ -243,6 +243,10 @@ static inline int ssb_sflash_init(struct ssb_chipcommon *cc)
 extern struct platform_device ssb_pflash_dev;
 #endif
 
+#ifdef CONFIG_SSB_SFLASH
+extern struct platform_device ssb_sflash_dev;
+#endif
+
 #ifdef CONFIG_SSB_DRIVER_EXTIF
 extern u32 ssb_extif_watchdog_timer_set_wdt(struct bcm47xx_wdt *wdt, u32 ticks);
 extern u32 ssb_extif_watchdog_timer_set_ms(struct bcm47xx_wdt *wdt, u32 ms);