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65a7896987
Currently nvgpu reads the temperature by reading the
NV_THERM_I2CS_SENSOR_00 register. Below are the issues
with current approach
1) NV_THERM_I2CS_SENSOR_00 doesn't support
fractional precision which is POR.
2) It doesn't support negative temperatures which
is required for Auto.
3) It doesn't take into account the right POR
sensor in VFE VBIOS tables.
From therm channel get status interface we can read the
current temperature from PMU.
NVBUG - 200549047
Change-Id: I2fb21926208876f3d3bebe3f2dee08edafedbc7d
Signed-off-by: rmylavarapu <rmylavarapu@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2196224
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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* Copyright (c) 2019, NVIDIA Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/debugfs.h>
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#include <nvgpu/pmu/therm.h>
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#include "os_linux.h"
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static int therm_get_internal_sensor_curr_temp(void *data, u64 *val)
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{
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struct gk20a *g = (struct gk20a *)data;
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u32 readval;
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int err;
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err = nvgpu_therm_channel_get_curr_temp(g, &readval);
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if (!err)
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*val = readval;
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return err;
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}
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DEFINE_SIMPLE_ATTRIBUTE(therm_ctrl_fops, therm_get_internal_sensor_curr_temp, NULL, "%llu\n");
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int tu104_therm_init_debugfs(struct gk20a *g)
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{
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struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
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struct dentry *dbgentry;
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dbgentry = debugfs_create_file(
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"temp", S_IRUGO, l->debugfs, g, &therm_ctrl_fops);
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if (!dbgentry)
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nvgpu_err(g, "debugfs entry create failed for therm_curr_temp");
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return 0;
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}
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