diff options
Diffstat (limited to 'meta-facebook/meta-wedge/recipes-wedge/fan-ctrl/fan-ctrl/init_pwm.sh')
-rwxr-xr-x | meta-facebook/meta-wedge/recipes-wedge/fan-ctrl/fan-ctrl/init_pwm.sh | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/meta-facebook/meta-wedge/recipes-wedge/fan-ctrl/fan-ctrl/init_pwm.sh b/meta-facebook/meta-wedge/recipes-wedge/fan-ctrl/fan-ctrl/init_pwm.sh deleted file mode 100755 index cf545be..0000000 --- a/meta-facebook/meta-wedge/recipes-wedge/fan-ctrl/fan-ctrl/init_pwm.sh +++ /dev/null @@ -1,71 +0,0 @@ -#!/bin/sh -# -# Copyright 2004-present Facebook. All Rights Reserved. -# -# This program file is free software; you can redistribute it and/or modify it -# under the terms of the GNU General Public License as published by the -# Free Software Foundation; version 2 of the License. -# -# This program is distributed in the hope that 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 in a file named COPYING; if not, write to the -# Free Software Foundation, Inc., -# 51 Franklin Street, Fifth Floor, -# Boston, MA 02110-1301 USA -# -PWM_DIR=/sys/devices/platform/ast_pwm_tacho.0 - -set -e - -# The PWM frequency is - -# clk_source / ((2 ^ division_) * (2 * division_l) * (unit + 1)) -# -# Our clk_source is 24Mhz. 4-pin fans are generally supposed to be driven with -# a 25Khz PWM control signal. Therefore we want the divisor to equal 960. -# -# We also want the unit to be as large as possible, since this controls the -# granularity with which we can modulate the PWM signal. The following -# settings allow us to set the fan from 0 to 100% in increments of 1/96th. -# -# The AST chip supports 3 different PWM clock configurations, but we only use -# type M for now. -echo 0 > $PWM_DIR/pwm_type_m_division_h -echo 5 > $PWM_DIR/pwm_type_m_division_l -echo 95 > $PWM_DIR/pwm_type_m_unit - -# On wedge, there are 4 fans connected. -# Each fan has one PWM input and 2 tacho outputs. -# Here is the mapping between the fan and PWN/Tacho, -# staring from the one from the edge -# Fan 0: PWM 7, Tacho3, Tacho7 -# Fan 1: PWM 6, Tacho2, Tacho6 -# Fan 2: PWM 0, Tacho0, Tacho4 -# Fan 3: PWM 1, Tacho1, Tacho5 - -# For each fan, setting the type, and 100% initially -for pwm in 0 1 6 7; do - echo 0 > $PWM_DIR/pwm${pwm}_type - echo 0 > $PWM_DIR/pwm${pwm}_rising - echo 0 > $PWM_DIR/pwm${pwm}_falling - echo 1 > $PWM_DIR/pwm${pwm}_en -done - -# Enable Tach 0..7 -echo 0 > $PWM_DIR/tacho0_source -echo 0 > $PWM_DIR/tacho4_source -echo 1 > $PWM_DIR/tacho1_source -echo 1 > $PWM_DIR/tacho5_source -echo 6 > $PWM_DIR/tacho2_source -echo 6 > $PWM_DIR/tacho6_source -echo 7 > $PWM_DIR/tacho3_source -echo 7 > $PWM_DIR/tacho7_source -t=0 -while [ $t -le 7 ]; do - echo 1 > $PWM_DIR/tacho${t}_en - t=$((t+1)) -done |