linux-kernel - [PATCH 1/3] ARM: imx25: support silicon revision 1.2

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Message-Id: <20220602080344.208702-2-martin@kaiser.cx>
Date:   Thu,  2 Jun 2022 10:03:42 +0200
From:   Martin Kaiser <martin@...ser.cx>
To:     Shawn Guo <shawnguo@...nel.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, Martin Kaiser <martin@...ser.cx>
Subject: [PATCH 1/3] ARM: imx25: support silicon revision 1.2

Update the mx25_read_cpu_rev function to recognize silicon revision 1.2
for imx25 chipsets.

Silicon revision 1.2 is mentioned in the errata document at
https://www.nxp.com/docs/en/errata/IMX25CE.pdf. The imx25 chips on my
test boards show revision 1.2 as well.

Signed-off-by: Martin Kaiser <martin@...ser.cx>
---
 arch/arm/mach-imx/cpu-imx25.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-imx/cpu-imx25.c b/arch/arm/mach-imx/cpu-imx25.c
index b2e1963f473d..3e63445cde06 100644
--- a/arch/arm/mach-imx/cpu-imx25.c
+++ b/arch/arm/mach-imx/cpu-imx25.c
@@ -32,6 +32,8 @@ static int mx25_read_cpu_rev(void)
 		return IMX_CHIP_REVISION_1_0;
 	case 0x01:
 		return IMX_CHIP_REVISION_1_1;
+	case 0x02:
+		return IMX_CHIP_REVISION_1_2;
 	default:
 		return IMX_CHIP_REVISION_UNKNOWN;
 	}
-- 
2.30.2