/*
 * Copyright (c) 2019-2020, NVIDIA Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/debugfs.h>
#include <nvgpu/pmu/therm.h>

#include "os_linux.h"

static int therm_get_internal_sensor_curr_temp(void *data, u64 *val)
{
	struct gk20a *g = (struct gk20a *)data;
	u32 readval;
	int err = 0;

	/*
	 * If PSTATE is enabled, temp value is taken from THERM_GET_STATUS.
	 * If PSTATE is disable, temp value is read from NV_THERM_I2CS_SENSOR_00
	 * register value.
	 */
	if (nvgpu_is_enabled(g, NVGPU_PMU_PSTATE)) {
		err = nvgpu_pmu_therm_channel_get_curr_temp(g, &readval);
		if (!err) {
			*val = readval;
		}
	} else {
		if (!g->ops.therm.get_internal_sensor_curr_temp) {
			nvgpu_err(g, "reading NV_THERM_I2CS_SENSOR_00 not enabled");
			return -EINVAL;
		}

		g->ops.therm.get_internal_sensor_curr_temp(g, &readval);
		*val = readval;
	}

	return err;
}
DEFINE_SIMPLE_ATTRIBUTE(therm_ctrl_fops, therm_get_internal_sensor_curr_temp, NULL, "%llu\n");

int tu104_therm_init_debugfs(struct gk20a *g)
{
	struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
	struct dentry *dbgentry;

	dbgentry = debugfs_create_file(
		"temp", S_IRUGO, l->debugfs, g, &therm_ctrl_fops);
	if (!dbgentry)
		nvgpu_err(g, "debugfs entry create failed for therm_curr_temp");

	return 0;
}