From 49c3fb25822565a9078961cdef1222aaa8c7e89a Mon Sep 17 00:00:00 2001 From: Lakshmanan M Date: Fri, 2 Sep 2016 16:42:04 +0530 Subject: gpu: nvgpu: gp10x: Add debugfs entry for temperature reading Added current temperature reading support for gp10x. JIRA DNVGPU-48 Change-Id: I45959da28bbd207dcf899a9eb37900c69895cfc1 Signed-off-by: Lakshmanan M Reviewed-on: http://git-master/r/1213717 (cherry picked from commit 805245889d1df8aefce277cff9ea31ea5fb4706b) Reviewed-on: http://git-master/r/1234092 GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom Tested-by: Terje Bergstrom --- drivers/gpu/nvgpu/gp106/therm_gp106.c | 62 +++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 drivers/gpu/nvgpu/gp106/therm_gp106.c (limited to 'drivers/gpu/nvgpu/gp106/therm_gp106.c') diff --git a/drivers/gpu/nvgpu/gp106/therm_gp106.c b/drivers/gpu/nvgpu/gp106/therm_gp106.c new file mode 100644 index 00000000..153e953d --- /dev/null +++ b/drivers/gpu/nvgpu/gp106/therm_gp106.c @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2016, 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. + */ + +#include "therm_gp106.h" +#include +#include "hw_therm_gp106.h" + +#ifdef CONFIG_DEBUG_FS +static int therm_get_internal_sensor_curr_temp(void *data, u64 *val) +{ + struct gk20a *g = (struct gk20a *)data; + int err = 0; + u32 readval; + + readval = gk20a_readl(g, therm_temp_sensor_tsense_r()); + + if (!(therm_temp_sensor_tsense_state_v(readval) & + therm_temp_sensor_tsense_state_valid_v())) { + gk20a_err(dev_from_gk20a(g), + "Attempt to read temperature while sensor is OFF!\n"); + err = -EINVAL; + } else if (therm_temp_sensor_tsense_state_v(readval) & + therm_temp_sensor_tsense_state_shadow_v()) { + gk20a_err(dev_from_gk20a(g), + "Reading temperature from SHADOWed sensor!\n"); + } + + // Convert from F9.5 -> F27.5 -> F24.8. + readval &= therm_temp_sensor_tsense_fixed_point_m(); + + *val = readval; + + return err; +} +DEFINE_SIMPLE_ATTRIBUTE(therm_ctrl_fops, therm_get_internal_sensor_curr_temp, NULL, "%llu\n"); + +static void gp106_therm_debugfs_init(struct gk20a *g) { + struct gk20a_platform *platform = dev_get_drvdata(g->dev); + struct dentry *dbgentry; + + dbgentry = debugfs_create_file( + "temp", S_IRUGO, platform->debugfs, g, &therm_ctrl_fops); + if (!dbgentry) + gk20a_err(dev_from_gk20a(g), "debugfs entry create failed for therm_curr_temp"); +} +#endif + +void gp106_init_therm_ops(struct gpu_ops *gops) { +#ifdef CONFIG_DEBUG_FS + gops->therm.therm_debugfs_init = gp106_therm_debugfs_init; +#endif +} -- cgit v1.2.2