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/s2mps11.h> 14 15 static const struct pmic_child_info pmic_children_info[] = { 16 { .prefix = S2MPS11_OF_LDO_PREFIX, .driver = S2MPS11_LDO_DRIVER }, 17 { .prefix = S2MPS11_OF_BUCK_PREFIX, .driver = S2MPS11_BUCK_DRIVER }, 18 { }, 19 }; 20 21 static int s2mps11_reg_count(struct udevice *dev) 22 { 23 return S2MPS11_REG_COUNT; 24 } 25 26 static int s2mps11_write(struct udevice *dev, uint reg, const uint8_t *buff, 27 int len) 28 { 29 int ret; 30 31 ret = dm_i2c_write(dev, reg, buff, len); 32 if (ret) 33 pr_err("write error to device: %p register: %#x!\n", dev, reg); 34 35 return ret; 36 } 37 38 static int s2mps11_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 39 { 40 int ret; 41 42 ret = dm_i2c_read(dev, reg, buff, len); 43 if (ret) 44 pr_err("read error from device: %p register: %#x!\n", dev, reg); 45 46 return ret; 47 } 48 49 static int s2mps11_probe(struct udevice *dev) 50 { 51 ofnode regulators_node; 52 int children; 53 54 regulators_node = dev_read_subnode(dev, "voltage-regulators"); 55 if (!ofnode_valid(regulators_node)) { 56 debug("%s: %s regulators subnode not found!\n", __func__, 57 dev->name); 58 return -ENXIO; 59 } 60 61 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 62 63 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 64 if (!children) 65 debug("%s: %s - no child found\n", __func__, dev->name); 66 67 return 0; 68 } 69 70 static struct dm_pmic_ops s2mps11_ops = { 71 .reg_count = s2mps11_reg_count, 72 .read = s2mps11_read, 73 .write = s2mps11_write, 74 }; 75 76 static const struct udevice_id s2mps11_ids[] = { 77 { .compatible = "samsung,s2mps11-pmic" }, 78 { } 79 }; 80 81 U_BOOT_DRIVER(pmic_s2mps11) = { 82 .name = "s2mps11_pmic", 83 .id = UCLASS_PMIC, 84 .of_match = s2mps11_ids, 85 .ops = &s2mps11_ops, 86 .probe = s2mps11_probe, 87 }; 88