1 // SPDX-License-Identifier: GPL-2.0+
3 * PMIC Error Signal Monitor driver
5 * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
6 * Tero Kristo <t-kristo@ti.com>
13 #include <power/pmic.h>
14 #include <dm/device_compat.h>
15 #include <linux/bitops.h>
17 #define INT_ESM_REG 0x6c
18 #define INT_ESM_MASK 0x3f
20 #define ESM_MCU_START_REG 0x8f
22 #define ESM_MCU_START BIT(0)
24 #define ESM_MCU_MODE_CFG_REG 0x92
26 #define ESM_MCU_EN BIT(6)
27 #define ESM_MCU_ENDRV BIT(5)
30 * pmic_esm_probe: configures and enables PMIC ESM functionality
32 * Configures ESM PMIC support and enables it.
34 static int pmic_esm_probe(struct udevice *dev)
38 ret = pmic_reg_write(dev->parent, INT_ESM_REG, INT_ESM_MASK);
40 dev_err(dev, "clearing ESM irqs failed: %d\n", ret);
44 ret = pmic_reg_write(dev->parent, ESM_MCU_MODE_CFG_REG,
45 ESM_MCU_EN | ESM_MCU_ENDRV);
47 dev_err(dev, "setting ESM mode failed: %d\n", ret);
51 ret = pmic_reg_write(dev->parent, ESM_MCU_START_REG, ESM_MCU_START);
53 dev_err(dev, "starting ESM failed: %d\n", ret);
60 static const struct udevice_id pmic_esm_ids[] = {
61 { .compatible = "ti,tps659413-esm" },
65 U_BOOT_DRIVER(pmic_esm) = {
67 .of_match = pmic_esm_ids,
69 .probe = pmic_esm_probe,