// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2019-2020 Linaro Limited */ #include #include #include #include #include #include #include static int scmi_reset_set_level(struct reset_ctl *rst, bool assert_not_deassert) { struct scmi_rd_reset_in in = { .domain_id = rst->id, .flags = assert_not_deassert ? SCMI_RD_RESET_FLAG_ASSERT : 0, .reset_state = 0, }; struct scmi_rd_reset_out out; struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_RESET_DOMAIN, SCMI_RESET_DOMAIN_RESET, in, out); int ret; ret = devm_scmi_process_msg(rst->dev->parent, &msg); if (ret) return ret; return scmi_to_linux_errno(out.status); } static int scmi_reset_assert(struct reset_ctl *rst) { return scmi_reset_set_level(rst, true); } static int scmi_reset_deassert(struct reset_ctl *rst) { return scmi_reset_set_level(rst, false); } static int scmi_reset_request(struct reset_ctl *rst) { struct scmi_rd_attr_in in = { .domain_id = rst->id, }; struct scmi_rd_attr_out out; struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_RESET_DOMAIN, SCMI_RESET_DOMAIN_ATTRIBUTES, in, out); int ret; /* * We don't really care about the attribute, just check * the reset domain exists. */ ret = devm_scmi_process_msg(rst->dev->parent, &msg); if (ret) return ret; return scmi_to_linux_errno(out.status); } static int scmi_reset_rfree(struct reset_ctl *rst) { return 0; } static const struct reset_ops scmi_reset_domain_ops = { .request = scmi_reset_request, .rfree = scmi_reset_rfree, .rst_assert = scmi_reset_assert, .rst_deassert = scmi_reset_deassert, }; U_BOOT_DRIVER(scmi_reset_domain) = { .name = "scmi_reset_domain", .id = UCLASS_RESET, .ops = &scmi_reset_domain_ops, };