123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c), Vaisala Oyj
- */
- #include <common.h>
- #include <dm.h>
- #include <dm/device_compat.h>
- #include <reboot-mode/reboot-mode-rtc.h>
- #include <reboot-mode/reboot-mode.h>
- #include <rtc.h>
- DECLARE_GLOBAL_DATA_PTR;
- static int reboot_mode_get(struct udevice *dev, u32 *buf)
- {
- if (!buf)
- return -EINVAL;
- int ret;
- u8 *val = (u8 *)buf;
- struct reboot_mode_rtc_platdata *plat_data;
- plat_data = dev_get_plat(dev);
- if (!plat_data)
- return -EINVAL;
- for (int i = 0; i < plat_data->size; i++) {
- ret = rtc_read8(plat_data->rtc, plat_data->addr + i);
- if (ret < 0)
- return ret;
- val[i] = ret;
- }
- if (plat_data->is_big_endian)
- *buf = __be32_to_cpu(*buf);
- else
- *buf = __le32_to_cpu(*buf);
- return 0;
- }
- static int reboot_mode_set(struct udevice *dev, u32 buf)
- {
- int ret;
- u8 *val;
- struct reboot_mode_rtc_platdata *plat_data;
- plat_data = dev_get_plat(dev);
- if (!plat_data)
- return -EINVAL;
- if (plat_data->is_big_endian)
- buf = __cpu_to_be32(buf);
- else
- buf = __cpu_to_le32(buf);
- val = (u8 *)&buf;
- for (int i = 0; i < plat_data->size; i++) {
- ret = rtc_write8(plat_data->rtc, (plat_data->addr + i), val[i]);
- if (ret < 0)
- return ret;
- }
- return 0;
- }
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- static int reboot_mode_ofdata_to_platdata(struct udevice *dev)
- {
- struct ofnode_phandle_args phandle_args;
- struct reboot_mode_rtc_platdata *plat_data;
- plat_data = dev_get_plat(dev);
- if (!plat_data)
- return -EINVAL;
- if (dev_read_phandle_with_args(dev, "rtc", NULL, 0, 0, &phandle_args)) {
- dev_err(dev, "RTC device not specified\n");
- return -ENOENT;
- }
- if (uclass_get_device_by_ofnode(UCLASS_RTC, phandle_args.node,
- &plat_data->rtc)) {
- dev_err(dev, "could not get the RTC device\n");
- return -ENODEV;
- }
- plat_data->addr =
- dev_read_addr_size_index(dev, 0, (fdt_size_t *)&plat_data->size);
- if (plat_data->addr == FDT_ADDR_T_NONE) {
- dev_err(dev, "Invalid RTC address\n");
- return -EINVAL;
- }
- if (plat_data->size > sizeof(u32)) {
- dev_err(dev, "Invalid reg size\n");
- return -EINVAL;
- }
- plat_data->is_big_endian = ofnode_read_bool(dev_ofnode(dev), "big-endian");
- return 0;
- }
- static const struct udevice_id reboot_mode_ids[] = {
- { .compatible = "reboot-mode-rtc", 0 },
- {}
- };
- #endif
- static const struct reboot_mode_ops reboot_mode_rtc_ops = {
- .get = reboot_mode_get,
- .set = reboot_mode_set,
- };
- U_BOOT_DRIVER(reboot_mode_rtc) = {
- .name = "reboot-mode-rtc",
- .id = UCLASS_REBOOT_MODE,
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- .of_match = reboot_mode_ids,
- .of_to_plat = reboot_mode_ofdata_to_platdata,
- #endif
- .plat_auto = sizeof(struct reboot_mode_rtc_platdata),
- .ops = &reboot_mode_rtc_ops,
- };
|