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 --- drivers/misc/esm_pmic.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/misc/esm_pmic.c b/drivers/misc/esm_pmic.c index a195dc5eb1d..b971f32f6a1 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);