4d9057e82b
This commit introduces the PMIC uclass implementation. It allows providing the basic I/O interface for PMIC devices. For the multi-function PMIC devices, this can be used as I/O parent device, for each IC's interface. Then, each PMIC particular function can be provided by the child device's operations, and the child devices will use its parent for read/write by the common API. Core files: - 'include/power/pmic.h' - 'drivers/power/pmic/pmic-uclass.c' The old pmic framework is still kept and is independent. For more detailed informations, please look into the header file. Changes: - new uclass-id: UCLASS_PMIC - new config: CONFIG_DM_PMIC Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org>
158 lines
3.2 KiB
C
158 lines
3.2 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 <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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static ulong str_get_num(const char *ptr, const char *maxptr)
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{
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if (!ptr || !maxptr)
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return 0;
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while (!isdigit(*ptr) && ptr++ < maxptr);
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return simple_strtoul(ptr, NULL, 0);
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}
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int pmic_bind_childs(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 node_name_len;
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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, &node_name_len);
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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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info = child_info;
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while (info->prefix) {
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prefix_len = strlen(info->prefix);
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if (strncasecmp(info->prefix, node_name, prefix_len) ||
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!info->driver) {
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info++;
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continue;
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}
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debug(" - compatible prefix: '%s'\n", info->prefix);
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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 = str_get_num(node_name +
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prefix_len,
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node_name +
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node_name_len);
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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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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)
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return -ENOSYS;
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return ops->reg_count;
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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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int ret;
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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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ret = ops->read(dev, reg, buffer, len);
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if (ret)
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return ret;
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return 0;
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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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int ret;
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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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ret = ops->write(dev, reg, buffer, len);
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if (ret)
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return ret;
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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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};
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