MIPS: ath79: Store the SoC revision in a global variable

Knowing the exact revision of the SoC is required to make runtime decisions
in various code paths.  We have determined the SoC revision already, so we
only need to store that in a global variable.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3027/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 3 insertions, 0 deletions

diff --git a/arch/mips/ath79/common.c b/arch/mips/ath79/common.c
index 38c2ad7..f0fda98 100644
--- a/arch/mips/ath79/common.c
+++ b/arch/mips/ath79/common.c
@@ -30,6 +30,7 @@ u32 ath79_ddr_freq;
 EXPORT_SYMBOL_GPL(ath79_ddr_freq);
 
 enum ath79_soc_type ath79_soc;
+unsigned int ath79_soc_rev;
 
 void __iomem *ath79_pll_base;
 void __iomem *ath79_reset_base;
diff --git a/arch/mips/ath79/setup.c b/arch/mips/ath79/setup.c
index 4187a11..61bf339 100644
--- a/arch/mips/ath79/setup.c
+++ b/arch/mips/ath79/setup.c
@@ -149,6 +149,8 @@ static void __init ath79_detect_sys_type(void)
 		panic("ath79: unknown SoC, id:0x%08x\n", id);
 	}
 
+	ath79_soc_rev = rev;
+
 	sprintf(ath79_sys_type, "Atheros AR%s rev %u", chip, rev);
 	pr_info("SoC: %s\n", ath79_sys_type);
 }