diff options
Diffstat (limited to 'chip/mec1322/pwm.c')
-rw-r--r-- | chip/mec1322/pwm.c | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/chip/mec1322/pwm.c b/chip/mec1322/pwm.c deleted file mode 100644 index ce94e50e7e..0000000000 --- a/chip/mec1322/pwm.c +++ /dev/null @@ -1,85 +0,0 @@ -/* Copyright 2013 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -/* PWM control module for MEC1322 */ - -#include "hooks.h" -#include "pwm.h" -#include "pwm_chip.h" -#include "registers.h" -#include "util.h" - -/* - * PWMs that must remain active in low-power idle - MEC1322_PCR_EC_SLP_EN - * bit mask. - */ -static uint32_t pwm_keep_awake_mask; - -void pwm_enable(enum pwm_channel ch, int enabled) -{ - int id = pwm_channels[ch].channel; - - if (enabled) { - MEC1322_PWM_CFG(id) |= 0x1; - if (pwm_channels[ch].flags & PWM_CONFIG_DSLEEP) - pwm_keep_awake_mask |= - MEC1322_PCR_EC_SLP_EN_PWM(id); - } else { - MEC1322_PWM_CFG(id) &= ~0x1; - pwm_keep_awake_mask &= ~MEC1322_PCR_EC_SLP_EN_PWM(id); - } -} - -int pwm_get_enabled(enum pwm_channel ch) -{ - return MEC1322_PWM_CFG(pwm_channels[ch].channel) & 0x1; -} - -void pwm_set_duty(enum pwm_channel ch, int percent) -{ - int id = pwm_channels[ch].channel; - - if (percent < 0) - percent = 0; - else if (percent > 100) - percent = 100; - - MEC1322_PWM_ON(id) = percent; - MEC1322_PWM_OFF(id) = 100 - percent; -} - -int pwm_get_duty(enum pwm_channel ch) -{ - return MEC1322_PWM_ON(pwm_channels[ch].channel); -} - -uint32_t pwm_get_keep_awake_mask(void) -{ - return pwm_keep_awake_mask; -} - -static void pwm_configure(int ch, int active_low, int clock_low) -{ - /* - * clock_low=0 selects the 48MHz Ring Oscillator source - * clock_low=1 selects the 100kHz_Clk source - */ - MEC1322_PWM_CFG(ch) = (15 << 3) | /* Pre-divider = 16 */ - (active_low ? BIT(2) : 0) | - (clock_low ? BIT(1) : 0); -} - -static void pwm_init(void) -{ - int i; - - for (i = 0; i < PWM_CH_COUNT; ++i) { - pwm_configure(pwm_channels[i].channel, - pwm_channels[i].flags & PWM_CONFIG_ACTIVE_LOW, - pwm_channels[i].flags & PWM_CONFIG_ALT_CLOCK); - pwm_set_duty(i, 0); - } -} -DECLARE_HOOK(HOOK_INIT, pwm_init, HOOK_PRIO_INIT_PWM); |