81d7cac4d1
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> [mpe: Fixup maple/setup.c which needs platform_device] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230724210247.778034-1-robh@kernel.org
132 lines
2.6 KiB
C
132 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* PowerNV sensor code
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*
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* Copyright (C) 2013 IBM
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*/
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#include <linux/delay.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <asm/opal.h>
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#include <asm/machdep.h>
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/*
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* This will return sensor information to driver based on the requested sensor
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* handle. A handle is an opaque id for the powernv, read by the driver from the
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* device tree..
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*/
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int opal_get_sensor_data(u32 sensor_hndl, u32 *sensor_data)
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{
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int ret, token;
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struct opal_msg msg;
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__be32 data;
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token = opal_async_get_token_interruptible();
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if (token < 0)
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return token;
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ret = opal_sensor_read(sensor_hndl, token, &data);
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switch (ret) {
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case OPAL_ASYNC_COMPLETION:
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ret = opal_async_wait_response(token, &msg);
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if (ret) {
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pr_err("%s: Failed to wait for the async response, %d\n",
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__func__, ret);
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goto out;
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}
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ret = opal_error_code(opal_get_async_rc(msg));
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*sensor_data = be32_to_cpu(data);
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break;
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case OPAL_SUCCESS:
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ret = 0;
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*sensor_data = be32_to_cpu(data);
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break;
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case OPAL_WRONG_STATE:
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ret = -EIO;
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break;
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default:
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ret = opal_error_code(ret);
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break;
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}
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out:
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opal_async_release_token(token);
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return ret;
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}
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EXPORT_SYMBOL_GPL(opal_get_sensor_data);
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int opal_get_sensor_data_u64(u32 sensor_hndl, u64 *sensor_data)
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{
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int ret, token;
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struct opal_msg msg;
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__be64 data;
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if (!opal_check_token(OPAL_SENSOR_READ_U64)) {
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u32 sdata;
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ret = opal_get_sensor_data(sensor_hndl, &sdata);
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if (!ret)
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*sensor_data = sdata;
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return ret;
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}
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token = opal_async_get_token_interruptible();
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if (token < 0)
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return token;
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ret = opal_sensor_read_u64(sensor_hndl, token, &data);
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switch (ret) {
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case OPAL_ASYNC_COMPLETION:
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ret = opal_async_wait_response(token, &msg);
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if (ret) {
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pr_err("%s: Failed to wait for the async response, %d\n",
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__func__, ret);
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goto out_token;
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}
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ret = opal_error_code(opal_get_async_rc(msg));
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*sensor_data = be64_to_cpu(data);
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break;
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case OPAL_SUCCESS:
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ret = 0;
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*sensor_data = be64_to_cpu(data);
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break;
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case OPAL_WRONG_STATE:
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ret = -EIO;
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break;
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default:
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ret = opal_error_code(ret);
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break;
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}
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out_token:
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opal_async_release_token(token);
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return ret;
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}
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EXPORT_SYMBOL_GPL(opal_get_sensor_data_u64);
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int __init opal_sensor_init(void)
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{
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struct platform_device *pdev;
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struct device_node *sensor;
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sensor = of_find_node_by_path("/ibm,opal/sensors");
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if (!sensor) {
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pr_err("Opal node 'sensors' not found\n");
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return -ENODEV;
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}
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pdev = of_platform_device_create(sensor, "opal-sensor", NULL);
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of_node_put(sensor);
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return PTR_ERR_OR_ZERO(pdev);
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}
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