mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 23:47:24 +00:00
8048a34376
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>
79 lines
1.6 KiB
C
79 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* PMIC Error Signal Monitor driver
|
|
*
|
|
* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Tero Kristo <t-kristo@ti.com>
|
|
*
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <power/pmic.h>
|
|
#include <dm/device_compat.h>
|
|
#include <linux/bitops.h>
|
|
|
|
#define INT_ESM_REG 0x6c
|
|
#define INT_ESM_MASK 0x3f
|
|
|
|
#define ESM_MCU_START_REG 0x8f
|
|
|
|
#define ESM_MCU_START BIT(0)
|
|
|
|
#define ESM_MCU_MODE_CFG_REG 0x92
|
|
|
|
#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
|
|
*
|
|
* Configures ESM PMIC support and enables it.
|
|
*/
|
|
static int pmic_esm_probe(struct udevice *dev)
|
|
{
|
|
int ret;
|
|
|
|
ret = pmic_reg_write(dev->parent, INT_ESM_REG, INT_ESM_MASK);
|
|
if (ret) {
|
|
dev_err(dev, "clearing ESM irqs failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = pmic_reg_write(dev->parent, ESM_MCU_MODE_CFG_REG,
|
|
ESM_MCU_EN | ESM_MCU_ENDRV);
|
|
if (ret) {
|
|
dev_err(dev, "setting ESM mode failed: %d\n", ret);
|
|
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);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id pmic_esm_ids[] = {
|
|
{ .compatible = "ti,tps659413-esm" },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(pmic_esm) = {
|
|
.name = "esm_pmic",
|
|
.of_match = pmic_esm_ids,
|
|
.id = UCLASS_MISC,
|
|
.probe = pmic_esm_probe,
|
|
};
|