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imx8m: imx8mq: get chip rev for B1 revision

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The i.MX8MQ B1 uses OCOTP_HW_OCOTP_READ_FUSE_DATA register for chip id.
It returns a magic number 0xff0055aa. update get_cpu_rev to support it,
and enable ocotp clock to access ocotp.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2019-10-16 10:24:17 +00:00 • committed by Stefano Babic
parent cde421cfc8
commit 9e09445549
2 changed files with 15 additions and 7 deletions
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1
arch/arm/mach-imx/imx8m/clock_imx8mq.c
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@ -804,6 +804,7 @@ int clock_init(void)
init_wdog_clk(); init_wdog_clk();
clock_enable(CCGR_TSENSOR, 1); clock_enable(CCGR_TSENSOR, 1);
clock_enable(CCGR_OCOTP, 1);
return 0; return 0;
} }

15
arch/arm/mach-imx/imx8m/soc.c
View file

@ -202,17 +202,24 @@ u32 get_cpu_rev(void)
} else { } else {
if (reg == CHIP_REV_1_0) { if (reg == CHIP_REV_1_0) {
/* /*
* For B0 chip, the DIGPROG is not updated, still TO1.0. * For B0 chip, the DIGPROG is not updated,
* we have to check ROM version further * it is still TO1.0. we have to check ROM
* version or OCOTP_READ_FUSE_DATA.
* 0xff0055aa is magic number for B1.
*/ */
rom_version = readl((void __iomem *)ROM_VERSION_A0); if (readl((void __iomem *)(OCOTP_BASE_ADDR + 0x40)) == 0xff0055aa) {
reg = CHIP_REV_2_1;
} else {
rom_version =
readl((void __iomem *)ROM_VERSION_A0);
if (rom_version != CHIP_REV_1_0) { if (rom_version != CHIP_REV_1_0) {
rom_version = readl((void __iomem *)ROM_VERSION_B0); rom_version = readl((void __iomem *)ROM_VERSION_B0);
if (rom_version >= CHIP_REV_2_0) if (rom_version == CHIP_REV_2_0)
reg = CHIP_REV_2_0; reg = CHIP_REV_2_0;
} }
} }
} }
}
return (type << 12) | reg; return (type << 12) | reg;
} }