172 lines
3.5 KiB
C
172 lines
3.5 KiB
C
/*
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* Copyright (C) 2014-2015 Samsung Electronics
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* Przemyslaw Marczak <p.marczak@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <errno.h>
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#include <dm.h>
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#include <vsprintf.h>
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#include <dm/lists.h>
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#include <dm/device-internal.h>
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#include <dm/uclass-internal.h>
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#include <power/pmic.h>
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#include <linux/ctype.h>
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DECLARE_GLOBAL_DATA_PTR;
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#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
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int pmic_bind_children(struct udevice *pmic, int offset,
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const struct pmic_child_info *child_info)
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{
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const struct pmic_child_info *info;
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const void *blob = gd->fdt_blob;
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struct driver *drv;
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struct udevice *child;
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const char *node_name;
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int bind_count = 0;
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int node;
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int prefix_len;
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int ret;
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debug("%s for '%s' at node offset: %d\n", __func__, pmic->name,
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pmic->of_offset);
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for (node = fdt_first_subnode(blob, offset);
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node > 0;
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node = fdt_next_subnode(blob, node)) {
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node_name = fdt_get_name(blob, node, NULL);
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debug("* Found child node: '%s' at offset:%d\n", node_name,
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node);
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child = NULL;
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for (info = child_info; info->prefix && info->driver; info++) {
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debug(" - compatible prefix: '%s'\n", info->prefix);
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prefix_len = strlen(info->prefix);
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if (strncmp(info->prefix, node_name, prefix_len))
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continue;
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drv = lists_driver_lookup_name(info->driver);
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if (!drv) {
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debug(" - driver: '%s' not found!\n",
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info->driver);
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continue;
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}
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debug(" - found child driver: '%s'\n", drv->name);
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ret = device_bind(pmic, drv, node_name, NULL,
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node, &child);
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if (ret) {
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debug(" - child binding error: %d\n", ret);
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continue;
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}
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debug(" - bound child device: '%s'\n", child->name);
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child->driver_data = trailing_strtol(node_name);
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debug(" - set 'child->driver_data': %lu\n",
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child->driver_data);
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break;
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}
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if (child)
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bind_count++;
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else
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debug(" - compatible prefix not found\n");
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}
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debug("Bound: %d childs for PMIC: '%s'\n", bind_count, pmic->name);
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return bind_count;
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}
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#endif
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int pmic_get(const char *name, struct udevice **devp)
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{
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return uclass_get_device_by_name(UCLASS_PMIC, name, devp);
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}
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int pmic_reg_count(struct udevice *dev)
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{
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const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
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if (!ops || !ops->reg_count)
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return -ENOSYS;
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return ops->reg_count(dev);
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}
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int pmic_read(struct udevice *dev, uint reg, uint8_t *buffer, int len)
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{
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const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
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if (!buffer)
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return -EFAULT;
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if (!ops || !ops->read)
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return -ENOSYS;
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return ops->read(dev, reg, buffer, len);
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}
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int pmic_write(struct udevice *dev, uint reg, const uint8_t *buffer, int len)
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{
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const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
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if (!buffer)
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return -EFAULT;
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if (!ops || !ops->write)
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return -ENOSYS;
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return ops->write(dev, reg, buffer, len);
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}
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int pmic_reg_read(struct udevice *dev, uint reg)
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{
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u8 byte;
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int ret;
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debug("%s: reg=%x", __func__, reg);
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ret = pmic_read(dev, reg, &byte, 1);
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debug(", value=%x, ret=%d\n", byte, ret);
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return ret ? ret : byte;
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}
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int pmic_reg_write(struct udevice *dev, uint reg, uint value)
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{
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u8 byte = value;
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int ret;
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debug("%s: reg=%x, value=%x", __func__, reg, value);
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ret = pmic_write(dev, reg, &byte, 1);
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debug(", ret=%d\n", ret);
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return ret;
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}
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int pmic_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set)
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{
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u8 byte;
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int ret;
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ret = pmic_reg_read(dev, reg);
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if (ret < 0)
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return ret;
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byte = (ret & ~clr) | set;
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return pmic_reg_write(dev, reg, byte);
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}
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UCLASS_DRIVER(pmic) = {
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.id = UCLASS_PMIC,
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.name = "pmic",
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};
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