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imx: add get_cpu_rev support for i.MX8MM

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There are several variants based on i.MX8MM, add the support in
get_cpu_rev

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2019-08-27 06:25:17 +00:00 committed by Stefano Babic
parent 20ebb4fa75
commit 78db9a5463
1 changed files with 47 additions and 10 deletions
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57
arch/arm/mach-imx/imx8m/soc.c
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@ -130,25 +130,62 @@ static struct mm_region imx8m_mem_map[] = {
struct mm_region *mem_map = imx8m_mem_map;
static u32 get_cpu_variant_type(u32 type)
{
struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
struct fuse_bank *bank = &ocotp->bank[1];
struct fuse_bank1_regs *fuse =
(struct fuse_bank1_regs *)bank->fuse_regs;
u32 value = readl(&fuse->tester4);
if (type == MXC_CPU_IMX8MM) {
switch (value & 0x3) {
case 2:
if (value & 0x1c0000)
return MXC_CPU_IMX8MMDL;
else
return MXC_CPU_IMX8MMD;
case 3:
if (value & 0x1c0000)
return MXC_CPU_IMX8MMSL;
else
return MXC_CPU_IMX8MMS;
default:
if (value & 0x1c0000)
return MXC_CPU_IMX8MML;
break;
}
}
return type;
}
u32 get_cpu_rev(void)
{
struct anamix_pll *ana_pll = (struct anamix_pll *)ANATOP_BASE_ADDR;
u32 reg = readl(&ana_pll->digprog);
u32 type = (reg >> 16) & 0xff;
u32 major_low = (reg >> 8) & 0xff;
u32 rom_version;
reg &= 0xff;
if (reg == CHIP_REV_1_0) {
/*
* For B0 chip, the DIGPROG is not updated, still TO1.0.
* we have to check ROM version further
*/
rom_version = readl((void __iomem *)ROM_VERSION_A0);
if (rom_version != CHIP_REV_1_0) {
rom_version = readl((void __iomem *)ROM_VERSION_B0);
if (rom_version >= CHIP_REV_2_0)
reg = CHIP_REV_2_0;
/* i.MX8MM */
if (major_low == 0x41) {
type = get_cpu_variant_type(MXC_CPU_IMX8MM);
} else {
if (reg == CHIP_REV_1_0) {
/*
* For B0 chip, the DIGPROG is not updated, still TO1.0.
* we have to check ROM version further
*/
rom_version = readl((void __iomem *)ROM_VERSION_A0);
if (rom_version != CHIP_REV_1_0) {
rom_version = readl((void __iomem *)ROM_VERSION_B0);
if (rom_version >= CHIP_REV_2_0)
reg = CHIP_REV_2_0;
}
}
}