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 <log.h> 13#include <linux/printk.h> 14#include <power/pmic.h> 15#include <power/s2mps11.h> 16 17static const struct pmic_child_info pmic_children_info[] = { 18 { .prefix = S2MPS11_OF_LDO_PREFIX, .driver = S2MPS11_LDO_DRIVER }, 19 { .prefix = S2MPS11_OF_BUCK_PREFIX, .driver = S2MPS11_BUCK_DRIVER }, 20 { }, 21}; 22 23static int s2mps11_reg_count(struct udevice *dev) 24{ 25 return S2MPS11_REG_COUNT; 26} 27 28static int s2mps11_write(struct udevice *dev, uint reg, const uint8_t *buff, 29 int len) 30{ 31 int ret; 32 33 ret = dm_i2c_write(dev, reg, buff, len); 34 if (ret) 35 pr_err("write error to device: %p register: %#x!\n", dev, reg); 36 37 return ret; 38} 39 40static int s2mps11_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 41{ 42 int ret; 43 44 ret = dm_i2c_read(dev, reg, buff, len); 45 if (ret) 46 pr_err("read error from device: %p register: %#x!\n", dev, reg); 47 48 return ret; 49} 50 51static int s2mps11_probe(struct udevice *dev) 52{ 53 ofnode regulators_node; 54 int children; 55 56 regulators_node = dev_read_subnode(dev, "voltage-regulators"); 57 if (!ofnode_valid(regulators_node)) { 58 debug("%s: %s regulators subnode not found!\n", __func__, 59 dev->name); 60 return -ENXIO; 61 } 62 63 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 64 65 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 66 if (!children) 67 debug("%s: %s - no child found\n", __func__, dev->name); 68 69 return 0; 70} 71 72static struct dm_pmic_ops s2mps11_ops = { 73 .reg_count = s2mps11_reg_count, 74 .read = s2mps11_read, 75 .write = s2mps11_write, 76}; 77 78static const struct udevice_id s2mps11_ids[] = { 79 { .compatible = "samsung,s2mps11-pmic" }, 80 { } 81}; 82 83U_BOOT_DRIVER(pmic_s2mps11) = { 84 .name = "s2mps11_pmic", 85 .id = UCLASS_PMIC, 86 .of_match = s2mps11_ids, 87 .ops = &s2mps11_ops, 88 .probe = s2mps11_probe, 89}; 90