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- // 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)
- /**
- * 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_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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