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Commit b29b3e6f authored by Shawn Guo's avatar Shawn Guo
Browse files

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: default avatarDrew Moseley <drew_moseley@mentor.com>
[drew: add proper error checking for function imx6q_revision()]
Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
parent 7b7d6727

arch/arm/mach-imx/mach-imx6q.c

+35 −0
Original line number Original line Diff line number Diff line
@@ -38,6 +38,40 @@ 
#include "cpuidle.h"

#include "cpuidle.h"

#include "hardware.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)

void imx6q_restart(char mode, const char *cmd)

{

{

	struct device_node *np;

	struct device_node *np;
@@ -192,6 +226,7 @@ static void __init imx6q_timer_init(void) 
{

{

	mx6q_clocks_init();

	mx6q_clocks_init();

	twd_local_timer_of_register();

	twd_local_timer_of_register();

	imx_print_silicon_rev("i.MX6Q", imx6q_revision());

}

}





static struct sys_timer imx6q_timer = {

static struct sys_timer imx6q_timer = {