lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

omap4: Update id.c and cpu.h for es2.0

Browse Source 
This patch updates the id.c and cpu.h files to support
omap4 ES2.0 silicon detection. Few initial omap4 es2 samples
IDCODE is same as es1. So the patch uses ARM cpuid register to
detect the ES version for such samples

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
This commit is contained in:
Santosh Shilimkar 2010-09-16 18:44:46 +05:30
parent f47d8c694e
commit ed6be0bafc
2 changed files with 35 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
arch/arm/mach-omap2/id.c
View File

@ -298,7 +298,6 @@ static void __init omap4_check_revision(void)
u32 idcode;
u16 hawkeye;
u8 rev;
char *rev_name = "ES1.0";
/*
* The IC rev detection is done with hawkeye and rev.
@ -309,14 +308,39 @@ static void __init omap4_check_revision(void)
hawkeye = (idcode >> 12) & 0xffff;
rev = (idcode >> 28) & 0xff;
if ((hawkeye == 0xb852) && (rev == 0x0)) {
omap_revision = OMAP4430_REV_ES1_0;
omap_chip.oc |= CHIP_IS_OMAP4430ES1;
pr_info("OMAP%04x %s\n", omap_rev() >> 16, rev_name);
return;
/*
* Few initial ES2.0 samples IDCODE is same as ES1.0
* Use ARM register to detect the correct ES version
*/
if (!rev) {
idcode = read_cpuid(CPUID_ID);
rev = (idcode & 0xf) - 1;
}
pr_err("Unknown OMAP4 CPU id\n");
switch (hawkeye) {
case 0xb852:
switch (rev) {
case 0:
omap_revision = OMAP4430_REV_ES1_0;
omap_chip.oc |= CHIP_IS_OMAP4430ES1;
break;
case 1:
omap_revision = OMAP4430_REV_ES2_0;
omap_chip.oc |= CHIP_IS_OMAP4430ES2;
break;
default:
omap_revision = OMAP4430_REV_ES2_0;
omap_chip.oc |= CHIP_IS_OMAP4430ES2;
}
break;
default:
/* Unknown default to latest silicon rev as default*/
omap_revision = OMAP4430_REV_ES2_0;
omap_chip.oc |= CHIP_IS_OMAP4430ES2;
}
pr_info("OMAP%04x ES%d.0\n",
omap_rev() >> 16, ((omap_rev() >> 12) & 0xf) + 1);
}
#define OMAP3_SHOW_FEATURE(feat) \

5
arch/arm/plat-omap/include/plat/cpu.h
View File

@ -391,6 +391,7 @@ IS_OMAP_TYPE(3517, 0x3517)
#define OMAP443X_CLASS 0x44300044
#define OMAP4430_REV_ES1_0 0x44300044
#define OMAP4430_REV_ES2_0 0x44301044
/*
* omap_chip bits
@ -417,10 +418,12 @@ IS_OMAP_TYPE(3517, 0x3517)
#define CHIP_IS_OMAP4430ES1 (1 << 8)
#define CHIP_IS_OMAP3630ES1_1 (1 << 9)
#define CHIP_IS_OMAP3630ES1_2 (1 << 10)
#define CHIP_IS_OMAP4430ES2 (1 << 11)
#define CHIP_IS_OMAP24XX (CHIP_IS_OMAP2420 | CHIP_IS_OMAP2430)
#define CHIP_IS_OMAP4430 (CHIP_IS_OMAP4430ES1)
#define CHIP_IS_OMAP4430 (CHIP_IS_OMAP4430ES1 | \
CHIP_IS_OMAP4430ES2)
/*
* "GE" here represents "greater than or equal to" in terms of ES