提交 f1c6f314 编写于 作者: S Shawn Guo

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

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: NShawn Guo <shawn.guo@linaro.org>
上级 3f75978b
......@@ -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);
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;
}
return digprog;
mxc_set_cpu_type(digprog >> 16 & 0xff);
imx_set_soc_revision(revision);
}
void __init imx_anatop_init(void)
......
......@@ -78,6 +78,7 @@ extern void imx_set_aips(void __iomem *);
extern int mxc_device_init(void);
void imx_set_soc_revision(unsigned int rev);
unsigned int imx_get_soc_revision(void);
void imx_init_revision_from_anatop(void);
enum mxc_cpu_pwr_mode {
WAIT_CLOCKED, /* wfi only */
......@@ -134,7 +135,6 @@ extern void imx_gpc_restore_all(void);
extern void imx_anatop_init(void);
extern void imx_anatop_pre_suspend(void);
extern void imx_anatop_post_resume(void);
extern u32 imx_anatop_get_digprog(void);
extern int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode);
extern void imx6q_set_chicken_bit(void);
......
......@@ -38,29 +38,6 @@
#include "cpuidle.h"
#include "hardware.h"
static void __init imx6q_init_revision(void)
{
u32 rev = imx_anatop_get_digprog();
u32 chip_revision;
switch (rev & 0xff) {
case 0:
chip_revision = IMX_CHIP_REVISION_1_0;
break;
case 1:
chip_revision = IMX_CHIP_REVISION_1_1;
break;
case 2:
chip_revision = IMX_CHIP_REVISION_1_2;
break;
default:
chip_revision = IMX_CHIP_REVISION_UNKNOWN;
}
mxc_set_cpu_type(rev >> 16 & 0xff);
imx_set_soc_revision(chip_revision);
}
static void imx6q_restart(enum reboot_mode mode, const char *cmd)
{
struct device_node *np;
......@@ -282,7 +259,7 @@ static void __init imx6q_map_io(void)
static void __init imx6q_init_irq(void)
{
imx6q_init_revision();
imx_init_revision_from_anatop();
imx_init_l2cache();
imx_src_init();
imx_gpc_init();
......
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