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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>
This commit is contained in:
Shawn Guo 2012-10-23 19:00:39 +08:00
parent 7b7d672734
commit b29b3e6f6c
1 changed files with 35 additions and 0 deletions
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35
arch/arm/mach-imx/mach-imx6q.c
View File

@ -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 = {