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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
200 lines
4.6 KiB
C
200 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#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 <log.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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#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
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int pmic_bind_children(struct udevice *pmic, ofnode parent,
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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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struct driver *drv;
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struct udevice *child;
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const char *node_name;
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const char *reg_name;
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int bind_count = 0;
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ofnode 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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dev_of_offset(pmic));
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ofnode_for_each_subnode(node, parent) {
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node_name = ofnode_get_name(node);
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debug("* Found child node: '%s'\n", node_name);
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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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reg_name = ofnode_read_string(node,
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"regulator-name");
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if (!reg_name)
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continue;
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if (strncmp(info->prefix, reg_name, prefix_len))
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continue;
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}
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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_with_driver_data(pmic, drv, node_name,
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0, 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 children 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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struct uc_pmic_priv *priv = dev_get_uclass_priv(dev);
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u32 val = 0;
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int ret;
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if (priv->trans_len < 1 || priv->trans_len > sizeof(val)) {
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debug("Wrong transmission size [%d]\n", priv->trans_len);
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return -EINVAL;
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}
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debug("%s: reg=%x priv->trans_len:%d", __func__, reg, priv->trans_len);
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ret = pmic_read(dev, reg, (uint8_t *)&val, priv->trans_len);
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debug(", value=%x, ret=%d\n", val, ret);
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return ret ? ret : val;
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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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struct uc_pmic_priv *priv = dev_get_uclass_priv(dev);
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int ret;
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if (priv->trans_len < 1 || priv->trans_len > sizeof(value)) {
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debug("Wrong transmission size [%d]\n", priv->trans_len);
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return -EINVAL;
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}
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debug("%s: reg=%x, value=%x priv->trans_len:%d", __func__, reg, value,
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priv->trans_len);
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ret = pmic_write(dev, reg, (uint8_t *)&value, priv->trans_len);
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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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struct uc_pmic_priv *priv = dev_get_uclass_priv(dev);
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u32 val = 0;
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int ret;
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if (priv->trans_len < 1 || priv->trans_len > sizeof(val)) {
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debug("Wrong transmission size [%d]\n", priv->trans_len);
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return -EINVAL;
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}
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ret = pmic_read(dev, reg, (uint8_t *)&val, priv->trans_len);
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if (ret < 0)
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return ret;
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val = (val & ~clr) | set;
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return pmic_write(dev, reg, (uint8_t *)&val, priv->trans_len);
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}
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static int pmic_pre_probe(struct udevice *dev)
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{
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struct uc_pmic_priv *pmic_priv = dev_get_uclass_priv(dev);
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pmic_priv->trans_len = 1;
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return 0;
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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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.pre_probe = pmic_pre_probe,
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.per_device_auto = sizeof(struct uc_pmic_priv),
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};
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