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// SPDX-License-Identifier: GPL-2.0+
/*
* PMIC Error Signal Monitor driver
*
* Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com/
* Tero Kristo <t-kristo@ti.com>
*
*/
#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,
};
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