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| author | Shawn Guo <shawn.guo@linaro.org> | 2012-10-23 15:00:39 +0400 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2012-11-16 10:18:54 +0400 |
| commit | b29b3e6f6c5a71a48475ac5ea7015ff267d60af8 (patch) | |
| tree | 11cb1a96dc42d26e39824bb783f1d73d65d521a2 /arch/arm/mach-imx | |
| parent | 7b7d6727344a2a7727255d61fa1bd3ff447c4f6c (diff) | |
| download | linux-b29b3e6f6c5a71a48475ac5ea7015ff267d60af8.tar.xz | |
ARM: imx6q: print silicon version on boot
i.MX6Q has 3 revisions 1.0, 1.1 and 1.2. Print revision on boot.
Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
[drew: add proper error checking for function imx6q_revision()]
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/mach-imx6q.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c index 978b6dd00de4..9511142d436c 100644 --- a/arch/arm/mach-imx/mach-imx6q.c +++ b/arch/arm/mach-imx/mach-imx6q.c @@ -38,6 +38,40 @@ #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"); + if (!np) + return IMX_CHIP_REVISION_UNKNOWN; + base = of_iomap(np, 0); + if (!base) { + of_node_put(np); + return IMX_CHIP_REVISION_UNKNOWN; + } + rev = readl_relaxed(base + IMX6Q_ANALOG_DIGPROG); + iounmap(base); + of_node_put(np); + } + + 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 +226,7 @@ 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 = { |