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ARM: imx: add a common function to initialize revision from anatop

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The patch creates a common function imx_init_revision_from_anatop() by
merging imx6q_init_revision() and imx_anatop_get_digprog(), so that any
SoC that encodes revision info in anatop can use it to initialize
revision.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Shawn Guo
2013-08-13 14:59:43 +08:00
parent 3f75978b37
commit f1c6f31472
3 changed files with 23 additions and 31 deletions
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27
arch/arm/mach-imx/anatop.c
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@@ -16,6 +16,7 @@
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include "common.h"
#include "hardware.h"
#define REG_SET 0x4
#define REG_CLR 0x8
@@ -76,21 +77,35 @@ static void imx_anatop_usb_chrg_detect_disable(void)
BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B);
}
u32 imx_anatop_get_digprog(void)
void __init imx_init_revision_from_anatop(void)
{
struct device_node *np;
void __iomem *anatop_base;
static u32 digprog;
if (digprog)
return digprog;
unsigned int revision;
u32 digprog;
np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-anatop");
anatop_base = of_iomap(np, 0);
WARN_ON(!anatop_base);
digprog = readl_relaxed(anatop_base + ANADIG_DIGPROG);
iounmap(anatop_base);
return digprog;
switch (digprog & 0xff) {
case 0:
revision = IMX_CHIP_REVISION_1_0;
break;
case 1:
revision = IMX_CHIP_REVISION_1_1;
break;
case 2:
revision = IMX_CHIP_REVISION_1_2;
break;
default:
revision = IMX_CHIP_REVISION_UNKNOWN;
}
mxc_set_cpu_type(digprog >> 16 & 0xff);
imx_set_soc_revision(revision);
}
void __init imx_anatop_init(void)