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imx8mm: Load fuse for TMU TCALIV and TASR

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On iMX8MM, the default value of TMU registers TCALIV and TASR need
be loaded from fuse. HW won't do this, it expect SW loads them before
using TMU.

Reviewed-by: Bai Ping <ping.bai@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ye Li 2020-05-03 22:19:52 +08:00 • committed by Stefano Babic
parent 634fe73eed
commit 70487ff386
1 changed files with 27 additions and 1 deletions
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28
arch/arm/mach-imx/imx8m/soc.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2017 NXP
* Copyright 2017-2019 NXP
*
* Peng Fan <peng.fan@nxp.com>
*/
@ -448,3 +448,29 @@ int arch_misc_init(void)
return 0;
}
#endif
void imx_tmu_arch_init(void *reg_base)
{
if (is_imx8mm()) {
/* Load TCALIV and TASR from fuses */
struct ocotp_regs *ocotp =
(struct ocotp_regs *)OCOTP_BASE_ADDR;
struct fuse_bank *bank = &ocotp->bank[3];
struct fuse_bank3_regs *fuse =
(struct fuse_bank3_regs *)bank->fuse_regs;
u32 tca_rt, tca_hr, tca_en;
u32 buf_vref, buf_slope;
tca_rt = fuse->ana0 & 0xFF;
tca_hr = (fuse->ana0 & 0xFF00) >> 8;
tca_en = (fuse->ana0 & 0x2000000) >> 25;
buf_vref = (fuse->ana0 & 0x1F00000) >> 20;
buf_slope = (fuse->ana0 & 0xF0000) >> 16;
writel(buf_vref | (buf_slope << 16), (ulong)reg_base + 0x28);
writel((tca_en << 31) | (tca_hr << 16) | tca_rt,
(ulong)reg_base + 0x30);
}
}