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When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
199 lines
4.6 KiB
C
199 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020-2022 Linaro Limited
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*/
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#define LOG_CATEGORY UCLASS_REGULATOR
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <scmi_agent.h>
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#include <scmi_protocols.h>
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#include <asm/types.h>
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#include <dm/device.h>
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#include <dm/device_compat.h>
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#include <dm/device-internal.h>
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#include <linux/kernel.h>
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#include <power/regulator.h>
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/**
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* struct scmi_regulator_platdata - Platform data for a scmi voltage domain regulator
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* @domain_id: ID representing the regulator for the related SCMI agent
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*/
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struct scmi_regulator_platdata {
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u32 domain_id;
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};
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static int scmi_voltd_set_enable(struct udevice *dev, bool enable)
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{
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struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
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struct scmi_voltd_config_set_in in = {
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.domain_id = pdata->domain_id,
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.config = enable ? SCMI_VOLTD_CONFIG_ON : SCMI_VOLTD_CONFIG_OFF,
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};
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struct scmi_voltd_config_set_out out;
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struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN,
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SCMI_VOLTAGE_DOMAIN_CONFIG_SET,
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in, out);
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int ret;
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ret = devm_scmi_process_msg(dev, &msg);
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if (ret)
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return ret;
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return scmi_to_linux_errno(out.status);
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}
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static int scmi_voltd_get_enable(struct udevice *dev)
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{
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struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
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struct scmi_voltd_config_get_in in = {
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.domain_id = pdata->domain_id,
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};
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struct scmi_voltd_config_get_out out;
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struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN,
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SCMI_VOLTAGE_DOMAIN_CONFIG_GET,
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in, out);
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int ret;
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ret = devm_scmi_process_msg(dev, &msg);
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if (ret < 0)
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return ret;
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ret = scmi_to_linux_errno(out.status);
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if (ret < 0)
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return ret;
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return out.config == SCMI_VOLTD_CONFIG_ON;
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}
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static int scmi_voltd_set_voltage_level(struct udevice *dev, int uV)
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{
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struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
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struct scmi_voltd_level_set_in in = {
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.domain_id = pdata->domain_id,
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.voltage_level = uV,
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};
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struct scmi_voltd_level_set_out out;
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struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN,
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SCMI_VOLTAGE_DOMAIN_LEVEL_SET,
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in, out);
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int ret;
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ret = devm_scmi_process_msg(dev, &msg);
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if (ret < 0)
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return ret;
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return scmi_to_linux_errno(out.status);
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}
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static int scmi_voltd_get_voltage_level(struct udevice *dev)
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{
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struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
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struct scmi_voltd_level_get_in in = {
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.domain_id = pdata->domain_id,
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};
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struct scmi_voltd_level_get_out out;
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struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN,
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SCMI_VOLTAGE_DOMAIN_LEVEL_GET,
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in, out);
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int ret;
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ret = devm_scmi_process_msg(dev, &msg);
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if (ret < 0)
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return ret;
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ret = scmi_to_linux_errno(out.status);
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if (ret < 0)
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return ret;
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return out.voltage_level;
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}
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static int scmi_regulator_of_to_plat(struct udevice *dev)
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{
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struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
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fdt_addr_t reg;
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reg = dev_read_addr(dev);
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if (reg == FDT_ADDR_T_NONE)
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return -EINVAL;
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pdata->domain_id = (u32)reg;
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return 0;
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}
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static int scmi_regulator_probe(struct udevice *dev)
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{
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struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
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struct scmi_voltd_attr_in in = { 0 };
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struct scmi_voltd_attr_out out = { 0 };
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struct scmi_msg scmi_msg = {
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.protocol_id = SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN,
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.message_id = SCMI_VOLTAGE_DOMAIN_ATTRIBUTES,
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.in_msg = (u8 *)&in,
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.in_msg_sz = sizeof(in),
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.out_msg = (u8 *)&out,
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.out_msg_sz = sizeof(out),
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};
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int ret;
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ret = devm_scmi_of_get_channel(dev);
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if (ret)
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return ret;
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/* Check voltage domain is known from SCMI server */
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in.domain_id = pdata->domain_id;
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ret = devm_scmi_process_msg(dev, &scmi_msg);
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if (ret) {
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dev_err(dev, "Failed to query voltage domain %u: %d\n",
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pdata->domain_id, ret);
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return -ENXIO;
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}
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return 0;
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}
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static const struct dm_regulator_ops scmi_voltd_ops = {
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.get_value = scmi_voltd_get_voltage_level,
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.set_value = scmi_voltd_set_voltage_level,
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.get_enable = scmi_voltd_get_enable,
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.set_enable = scmi_voltd_set_enable,
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};
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U_BOOT_DRIVER(scmi_regulator) = {
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.name = "scmi_regulator",
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.id = UCLASS_REGULATOR,
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.ops = &scmi_voltd_ops,
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.probe = scmi_regulator_probe,
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.of_to_plat = scmi_regulator_of_to_plat,
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.plat_auto = sizeof(struct scmi_regulator_platdata),
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};
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static int scmi_regulator_bind(struct udevice *dev)
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{
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struct driver *drv;
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ofnode node;
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int ret;
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drv = DM_DRIVER_GET(scmi_regulator);
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ofnode_for_each_subnode(node, dev_ofnode(dev)) {
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ret = device_bind(dev, drv, ofnode_get_name(node),
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NULL, node, NULL);
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if (ret)
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return ret;
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}
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return 0;
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}
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U_BOOT_DRIVER(scmi_voltage_domain) = {
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.name = "scmi_voltage_domain",
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.id = UCLASS_NOP,
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.bind = scmi_regulator_bind,
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};
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