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/s2mps11.h> 15 16 static const struct pmic_child_info pmic_children_info[] = { 17 { .prefix = S2MPS11_OF_LDO_PREFIX, .driver = S2MPS11_LDO_DRIVER }, 18 { .prefix = S2MPS11_OF_BUCK_PREFIX, .driver = S2MPS11_BUCK_DRIVER }, 19 { }, 20 }; 21 22 static int s2mps11_reg_count(struct udevice *dev) 23 { 24 return S2MPS11_REG_COUNT; 25 } 26 27 static int s2mps11_write(struct udevice *dev, uint reg, const uint8_t *buff, 28 int len) 29 { 30 int ret; 31 32 ret = dm_i2c_write(dev, reg, buff, len); 33 if (ret) 34 pr_err("write error to device: %p register: %#x!", dev, reg); 35 36 return ret; 37 } 38 39 static int s2mps11_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 40 { 41 int ret; 42 43 ret = dm_i2c_read(dev, reg, buff, len); 44 if (ret) 45 pr_err("read error from device: %p register: %#x!", dev, reg); 46 47 return ret; 48 } 49 50 static int s2mps11_probe(struct udevice *dev) 51 { 52 ofnode regulators_node; 53 int children; 54 55 regulators_node = dev_read_subnode(dev, "voltage-regulators"); 56 if (!ofnode_valid(regulators_node)) { 57 debug("%s: %s regulators subnode not found!", __func__, 58 dev->name); 59 return -ENXIO; 60 } 61 62 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 63 64 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 65 if (!children) 66 debug("%s: %s - no child found\n", __func__, dev->name); 67 68 return 0; 69 } 70 71 static struct dm_pmic_ops s2mps11_ops = { 72 .reg_count = s2mps11_reg_count, 73 .read = s2mps11_read, 74 .write = s2mps11_write, 75 }; 76 77 static const struct udevice_id s2mps11_ids[] = { 78 { .compatible = "samsung,s2mps11-pmic" }, 79 { } 80 }; 81 82 U_BOOT_DRIVER(pmic_s2mps11) = { 83 .name = "s2mps11_pmic", 84 .id = UCLASS_PMIC, 85 .of_match = s2mps11_ids, 86 .ops = &s2mps11_ops, 87 .probe = s2mps11_probe, 88 }; 89