From: Neha Malcom Francis <n-francis@ti.com>
Date: Wed, 5 Apr 2023 10:54:35 +0000 (+0530)
Subject: k3: pmic: Clear ESM masks
X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-logo.png?a=commitdiff_plain;h=8048a34376b1fa5856d646e188311533c51729fc;p=u-boot.git

k3: pmic: Clear ESM masks

ESM MCU masks must be set to 0h so that PMIC can handle errors
that require attention for example SYS_SAFETY_ERRn. The required bits
must be cleared: ESM_MCU_RST_MASK, ESM_MCU_FAIL_MASK, ESM_MCU_PIN_MASK.

If PMIC expected to handle errors, make sure EVM is configured to
connect SOC_SAFETY_ERRz (Main) to the PMIC.

Note that even though the User Guide for TPS65941 for J721E mentions
that these bits are reset to 0h; it is not reflected once board boots to
kernel, possibly due to NVM configurations. Eithercase, it is best to
account for this from R5 SPL side as well.

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
---

diff --git a/drivers/misc/esm_pmic.c b/drivers/misc/esm_pmic.c
index a195dc5eb1..b971f32f6a 100644
--- a/drivers/misc/esm_pmic.c
+++ b/drivers/misc/esm_pmic.c
@@ -26,6 +26,9 @@
 #define ESM_MCU_EN		BIT(6)
 #define ESM_MCU_ENDRV		BIT(5)
 
+#define ESM_MCU_MASK_REG	0x59
+#define ESM_MCU_MASK		0x7
+
 /**
  * pmic_esm_probe: configures and enables PMIC ESM functionality
  *
@@ -48,6 +51,12 @@ static int pmic_esm_probe(struct udevice *dev)
 		return ret;
 	}
 
+	ret = pmic_reg_write(dev->parent, ESM_MCU_MASK_REG, ESM_MCU_MASK);
+	if (ret) {
+		dev_err(dev, "clearing ESM masks failed: %d\n", ret);
+		return ret;
+	}
+
 	ret = pmic_reg_write(dev->parent, ESM_MCU_START_REG, ESM_MCU_START);
 	if (ret) {
 		dev_err(dev, "starting ESM failed: %d\n", ret);