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