1 /* 2 * Copyright (C) 2015 Samsung Electronics 3 * Przemyslaw Marczak <p.marczak@samsung.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <fdtdec.h> 10 #include <errno.h> 11 #include <dm.h> 12 #include <i2c.h> 13 #include <power/pmic.h> 14 #include <power/regulator.h> 15 #include <power/sandbox_pmic.h> 16 17 DECLARE_GLOBAL_DATA_PTR; 18 19 static const struct pmic_child_info pmic_children_info[] = { 20 { .prefix = SANDBOX_OF_LDO_PREFIX, .driver = SANDBOX_LDO_DRIVER }, 21 { .prefix = SANDBOX_OF_BUCK_PREFIX, .driver = SANDBOX_BUCK_DRIVER }, 22 { }, 23 }; 24 25 static int sandbox_pmic_reg_count(struct udevice *dev) 26 { 27 return SANDBOX_PMIC_REG_COUNT; 28 } 29 30 static int sandbox_pmic_write(struct udevice *dev, uint reg, 31 const uint8_t *buff, int len) 32 { 33 if (dm_i2c_write(dev, reg, buff, len)) { 34 pr_err("write error to device: %p register: %#x!", dev, reg); 35 return -EIO; 36 } 37 38 return 0; 39 } 40 41 static int sandbox_pmic_read(struct udevice *dev, uint reg, 42 uint8_t *buff, int len) 43 { 44 if (dm_i2c_read(dev, reg, buff, len)) { 45 pr_err("read error from device: %p register: %#x!", dev, reg); 46 return -EIO; 47 } 48 49 return 0; 50 } 51 52 static int sandbox_pmic_bind(struct udevice *dev) 53 { 54 if (!pmic_bind_children(dev, dev_ofnode(dev), pmic_children_info)) 55 pr_err("%s:%d PMIC: %s - no child found!", __func__, __LINE__, 56 dev->name); 57 58 /* Always return success for this device - allows for PMIC I/O */ 59 return 0; 60 } 61 62 static struct dm_pmic_ops sandbox_pmic_ops = { 63 .reg_count = sandbox_pmic_reg_count, 64 .read = sandbox_pmic_read, 65 .write = sandbox_pmic_write, 66 }; 67 68 static const struct udevice_id sandbox_pmic_ids[] = { 69 { .compatible = "sandbox,pmic" }, 70 { } 71 }; 72 73 U_BOOT_DRIVER(sandbox_pmic) = { 74 .name = "sandbox_pmic", 75 .id = UCLASS_PMIC, 76 .of_match = sandbox_pmic_ids, 77 .bind = sandbox_pmic_bind, 78 .ops = &sandbox_pmic_ops, 79 }; 80