From: Ye Li <ye.li@nxp.com>
Date: Sun, 3 May 2020 14:19:52 +0000 (+0800)
Subject: imx8mm: Load fuse for TMU TCALIV and TASR
X-Git-Tag: v2020.07-rc2~3^2~45
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=70487ff386c0b7ee40b83aff219f8b36829e8b13;p=oweals%2Fu-boot.git

imx8mm: Load fuse for TMU TCALIV and TASR

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>
---

diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index 89229da3b6..dcec83e624 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -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);
+	}
+}