mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-22 17:36:20 +03:00
d174860854
Changes: 1. Reading operating voltage and minimum voltage of chip. 2. Added nvgpu_volt_init_debugfs for creating the debugfs interface. 3. Command for reading current voltage: cat /sys/kernel/debug/gpu_pci/volt/current_voltage 4. Command for reading minimum voltage: cat /sys/kernel/debug/gpu_pci/volt/minimum_voltage Jira NVGPU-1731 Change-Id: I76d42fc376235f37c44d259398bd6f125a90413b Signed-off-by: rmylavarapu <rmylavarapu@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1986403 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>
81 lines
2.1 KiB
C
81 lines
2.1 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 "os_linux.h"
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#include <nvgpu/pmu/volt.h>
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#include <common/pmu/volt/volt_rail.h>
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static int get_curr_voltage(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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if (!g->ops.pmu_ver.volt.volt_get_voltage)
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return -EINVAL;
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err = g->ops.pmu_ver.volt.volt_get_voltage(g,
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CTRL_VOLT_DOMAIN_LOGIC, &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(curr_volt_ctrl_fops, get_curr_voltage, NULL, "%llu\n");
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static int get_min_voltage(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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if (!g->ops.pmu_ver.volt.volt_get_vmin)
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return -EINVAL;
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err = g->ops.pmu_ver.volt.volt_get_vmin(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(min_volt_ctrl_fops, get_min_voltage, NULL, "%llu\n");
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int nvgpu_volt_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, *volt_root;
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volt_root = debugfs_create_dir("volt", l->debugfs);
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dbgentry = debugfs_create_file(
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"current_voltage", S_IRUGO, volt_root, g, &curr_volt_ctrl_fops);
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if (!dbgentry) {
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pr_err("%s: Failed to make debugfs node\n", __func__);
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return -ENOMEM;
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}
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dbgentry = debugfs_create_file("minimum_voltage",
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S_IRUGO, volt_root, g, &min_volt_ctrl_fops);
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if (!dbgentry) {
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pr_err("%s: Failed to make debugfs node\n", __func__);
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return -ENOMEM;
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}
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return 0;
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}
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