[PATCH 01/10] ARM: imx6q: print silicon version on boot
From: Shawn Guo <hidden>
Date: 2012-10-23 15:22:50
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
i.MX6Q has 3 revisions 1.0, 1.1 and 1.2. Print revision on boot. Signed-off-by: Shawn Guo <redacted> --- arch/arm/mach-imx/mach-imx6q.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 978b6dd..1c5acf8 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c@@ -38,6 +38,33 @@ #include "cpuidle.h" #include "hardware.h" +#define IMX6Q_ANALOG_DIGPROG 0x260 + +static int imx6q_revision(void) +{ + struct device_node *np; + void __iomem *base; + static u32 rev; + + if (!rev) { + np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-anatop"); + base = of_iomap(np, 0); + rev = readl_relaxed(base + IMX6Q_ANALOG_DIGPROG); + iounmap(base); + } + + switch (rev & 0xff) { + case 0: + return IMX_CHIP_REVISION_1_0; + case 1: + return IMX_CHIP_REVISION_1_1; + case 2: + return IMX_CHIP_REVISION_1_2; + default: + return IMX_CHIP_REVISION_UNKNOWN; + } +} + void imx6q_restart(char mode, const char *cmd) { struct device_node *np;
@@ -192,6 +219,7 @@ static void __init imx6q_timer_init(void) { mx6q_clocks_init(); twd_local_timer_of_register(); + imx_print_silicon_rev("i.MX6Q", imx6q_revision()); } static struct sys_timer imx6q_timer = {
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1.7.9.5