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[v4,05/10] ARM: Exynos: use four additional chipid bits to identify Exynos family

Message ID 1371536962-13322-6-git-send-email-chander.kashyap@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Chander Kashyap June 18, 2013, 6:29 a.m. UTC 
Use chipid[27:20] bits to identify the Exynos family while setting up
the serial port during the uncompression setup. This uses four additional
bits of chipid to identify the Exynos family since this is required for
identifying Exynos5420 SoC.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
---
 arch/arm/mach-exynos/include/mach/uncompress.h |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
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Patch

diff --git a/arch/arm/mach-exynos/include/mach/uncompress.h b/arch/arm/mach-exynos/include/mach/uncompress.h
index 2979995..1937e0f 100644
--- a/arch/arm/mach-exynos/include/mach/uncompress.h
+++ b/arch/arm/mach-exynos/include/mach/uncompress.h
@@ -31,13 +31,12 @@  static void arch_detect_cpu(void)
 
 	/*
 	 * product_id is bits 31:12
-	 *    bits 23:20 describe the exynosX family
-	 *
+	 * bits 23:20 describe the exynosX family
+	 * bits 27:24 describe the exynosX family in exynos5420
 	 */
 	chip_id >>= 20;
-	chip_id &= 0xf;
 
-	if (chip_id == 0x5)
+	if ((chip_id & 0x0f) == 0x5 || (chip_id & 0xf0) == 0x50)
 		uart_base = (volatile u8 *)EXYNOS5_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);
 	else
 		uart_base = (volatile u8 *)EXYNOS4_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);