bcm53xx: fix loading SPROM content by bcma init change

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 44367

1 files changed, 70 insertions, 0 deletions

diff --git a/target/linux/bcm53xx/patches-3.18/800-bcma-use-two-different-initcalls-if-built-in.patch b/target/linux/bcm53xx/patches-3.18/800-bcma-use-two-different-initcalls-if-built-in.patch
new file mode 100644
index 0000000000..9d229a4c33
--- /dev/null
+++ b/target/linux/bcm53xx/patches-3.18/800-bcma-use-two-different-initcalls-if-built-in.patch
@@ -0,0 +1,70 @@
+From 666bdfc027cde41a171862dc698987a378c8b66a Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Date: Mon, 9 Feb 2015 18:00:42 +0100
+Subject: [PATCH RFC] bcma: use two different initcalls if built-in
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This is needed as we can't initialize bus during fs_initcall.
+Initialization requires SPROM which depends on NVRAM which depends on
+mtd. Since mtd, spi, nand, spi-nor use standard module_init, we have to
+do the same in bcma.
+Without this we'll try to initialize SPROM without having a ready SPROM
+proviver registered using bcma_arch_register_fallback_sprom.
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+---
+While this patch seems to work and I can compile bcma as built-in and
+module, I'm not too proud of it. I don't really like these #if(n)def
+tricks and I'm afraid bcma_modinit may be called even if
+bcma_modinit_early failed.
+
+Do you see any better idea of solving this?
+---
+ drivers/bcma/main.c | 16 ++++++++++++++--
+ 1 file changed, 14 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
+index 9635f10..c394207 100644
+--- a/drivers/bcma/main.c
++++ b/drivers/bcma/main.c
+@@ -639,13 +639,25 @@ static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+ 			      core->id.rev, core->id.class);
+ }
+ 
++/* Bus has to be registered early, before any bcma driver */
++static int __init bcma_modinit_early(void)
++{
++	return bus_register(&bcma_bus_type);
++}
++#ifndef MODULE
++fs_initcall(bcma_modinit_early);
++#endif
++
++/* Initialization has to be done later with SPI/mtd/NAND/SPROM available */
+ static int __init bcma_modinit(void)
+ {
+ 	int err;
+ 
+-	err = bus_register(&bcma_bus_type);
++#ifdef MODULE
++	err = bcma_modinit_early();
+ 	if (err)
+ 		return err;
++#endif
+ 
+ 	err = bcma_host_soc_register_driver();
+ 	if (err) {
+@@ -662,7 +674,7 @@ static int __init bcma_modinit(void)
+ 
+ 	return err;
+ }
+-fs_initcall(bcma_modinit);
++module_init(bcma_modinit);
+ 
+ static void __exit bcma_modexit(void)
+ {
+-- 
+1.8.4.5
+