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| author | Nishanth Menon <nm@ti.com> | 2017-08-05 02:42:09 (GMT) |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-08-13 19:17:35 (GMT) |
| commit | 0459bc30b601434abc27b75e7319ac790e6d5c80 (patch) | |
| tree | c203715f99d437c558c9ab241edd88e7a607aad9 /arch/arm/include/asm/arch-omap5/clock.h | |
| parent | 5796b6665176f4a57fcfff8df02599a8c3e6ec61 (diff) | |
| download | u-boot-fsl-qoriq-0459bc30b601434abc27b75e7319ac790e6d5c80.tar.xz | |
ARM: OMAP5: Enable support for AVS0 for OMAP5 production devices
OMAP5432 did go into production with AVS class0 registers which were
mutually exclusive from AVS Class 1.5 registers.
Most OMAP5-uEVM boards use the pre-production Class1.5 which has
production efuse registers set to 0. However on production devices,
these are set to valid data.
scale_vcore logic is already smart enough to detect this and use the
"Nominal voltage" on devices that do not have efuse registers populated.
On a test production device populated as follows:
MPU OPP_NOM:
=> md.l 0x04A0021C4 1
4a0021c4: 03a003e9 ....
(0x3e9 = 1.01v) vs nom voltage of 1.06v
MPU OPP_HIGH:
=> md.l 0x04A0021C8 1
4a0021c8: 03400485 ..@.
MM OPP_NOM:
=> md.l 0x04A0021A4 1
4a0021a4: 038003d4 ....
(0x3d4 = 980mV) vs nom voltage of 1.025v
MM OPP_OD:
=> md.l 0x04A0021A8 1
4a0021a8: 03600403 ..`.
CORE OPP_NOM:
=> md.l 0x04A0021D8 1
4a0021d8: 000003cf ....
(0x3cf = 975mV) vs nom voltage of 1.040v
Since the efuse values are'nt currently used, we do not regress on
existing pre-production samples (they continue to use nominal voltage).
But on boards that do have production samples populated, we can leverage
the optimal voltages necessary for proper operation.
Tested on:
a) 720-2644-001 OMAP5UEVM with production sample.
b) 750-2628-222(A) UEVM5432G-02 with pre-production sample.
Data based on OMAP5432 Technical reference Manual SWPU282AF (May
2012-Revised Aug 2016)
NOTE: All collaterals on OMAP5432 silicon itself seems to have been
removed from ti.com, though EVM details are still available:
http://www.ti.com/tool/OMAP5432-EVM
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Diffstat (limited to 'arch/arm/include/asm/arch-omap5/clock.h')
| -rw-r--r-- | arch/arm/include/asm/arch-omap5/clock.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-omap5/clock.h b/arch/arm/include/asm/arch-omap5/clock.h index dd05e8b..dbe340d 100644 --- a/arch/arm/include/asm/arch-omap5/clock.h +++ b/arch/arm/include/asm/arch-omap5/clock.h @@ -236,6 +236,22 @@ #define VDD_MPU_ES2_HIGH 1250 #define VDD_MM_ES2_OD 1120 +/* Efuse register offsets for OMAP5 platform */ +#define OMAP5_ES2_EFUSE_BASE 0x4A002000 +#define OMAP5_ES2_PROD_REGBITS 16 + +/* CONTROL_STD_FUSE_OPP_VDD_CORE_3 */ +#define OMAP5_ES2_PROD_CORE_OPNO_VMIN (OMAP5_ES2_EFUSE_BASE + 0x1D8) + +/* CONTROL_STD_FUSE_OPP_VDD_MM_4 */ +#define OMAP5_ES2_PROD_MM_OPNO_VMIN (OMAP5_ES2_EFUSE_BASE + 0x1A4) +/* CONTROL_STD_FUSE_OPP_VDD_MM_5 */ +#define OMAP5_ES2_PROD_MM_OPOD_VMIN (OMAP5_ES2_EFUSE_BASE + 0x1A8) +/* CONTROL_STD_FUSE_OPP_VDD_MPU_6 */ +#define OMAP5_ES2_PROD_MPU_OPNO_VMIN (OMAP5_ES2_EFUSE_BASE + 0x1C4) +/* CONTROL_STD_FUSE_OPP_VDD_MPU_7 */ +#define OMAP5_ES2_PROD_MPU_OPHI_VMIN (OMAP5_ES2_EFUSE_BASE + 0x1C8) + /* DRA74x/75x/72x voltage settings in mv for OPP_NOM per DM */ #define VDD_MPU_DRA7_NOM 1150 #define VDD_CORE_DRA7_NOM 1150 |