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 DECLARE_GLOBAL_DATA_PTR; 17 18 static const struct pmic_child_info pmic_children_info[] = { 19 { .prefix = S2MPS11_OF_LDO_PREFIX, .driver = S2MPS11_LDO_DRIVER }, 20 { .prefix = S2MPS11_OF_BUCK_PREFIX, .driver = S2MPS11_BUCK_DRIVER }, 21 { }, 22 }; 23 24 static int s2mps11_reg_count(struct udevice *dev) 25 { 26 return S2MPS11_REG_COUNT; 27 } 28 29 static int s2mps11_write(struct udevice *dev, uint reg, const uint8_t *buff, 30 int len) 31 { 32 int ret; 33 34 ret = dm_i2c_write(dev, reg, buff, len); 35 if (ret) 36 pr_err("write error to device: %p register: %#x!", dev, reg); 37 38 return ret; 39 } 40 41 static int s2mps11_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 42 { 43 int ret; 44 45 ret = dm_i2c_read(dev, reg, buff, len); 46 if (ret) 47 pr_err("read error from device: %p register: %#x!", dev, reg); 48 49 return ret; 50 } 51 52 static int s2mps11_probe(struct udevice *dev) 53 { 54 ofnode regulators_node; 55 int children; 56 57 regulators_node = dev_read_subnode(dev, "voltage-regulators"); 58 if (!ofnode_valid(regulators_node)) { 59 debug("%s: %s regulators subnode not found!", __func__, 60 dev->name); 61 return -ENXIO; 62 } 63 64 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 65 66 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 67 if (!children) 68 debug("%s: %s - no child found\n", __func__, dev->name); 69 70 return 0; 71 } 72 73 static struct dm_pmic_ops s2mps11_ops = { 74 .reg_count = s2mps11_reg_count, 75 .read = s2mps11_read, 76 .write = s2mps11_write, 77 }; 78 79 static const struct udevice_id s2mps11_ids[] = { 80 { .compatible = "samsung,s2mps11-pmic" }, 81 { } 82 }; 83 84 U_BOOT_DRIVER(pmic_s2mps11) = { 85 .name = "s2mps11_pmic", 86 .id = UCLASS_PMIC, 87 .of_match = s2mps11_ids, 88 .ops = &s2mps11_ops, 89 .probe = s2mps11_probe, 90 }; 91