1 files changed, 0 insertions, 170 deletions
diff --git a/chip/stm32/adc-stm32l.c b/chip/stm32/adc-stm32l.c
deleted file mode 100644
index c1f1cfae4a..0000000000
--- a/chip/stm32/adc-stm32l.c
+++ /dev/null
@@ -1,170 +0,0 @@
-/* Copyright 2012 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.
- */
-
-#include "adc.h"
-#include "common.h"
-#include "console.h"
-#include "clock.h"
-#include "dma.h"
-#include "hooks.h"
-#include "registers.h"
-#include "task.h"
-#include "timer.h"
-#include "util.h"
-
-#define ADC_SINGLE_READ_TIMEOUT 3000 /* 3 ms */
-
-struct mutex adc_lock;
-
-static int restore_clock;
-
-static inline void adc_set_channel(int sample_id, int channel)
-{
-	uint32_t mask, val;
-	volatile uint32_t *sqr_reg;
-	int reg_id;
-
-	reg_id = 5 - sample_id / 6;
-
-	mask = 0x1f << ((sample_id % 6) * 5);
-	val = channel << ((sample_id % 6) * 5);
-	sqr_reg = &STM32_ADC_SQR(reg_id);
-
-	*sqr_reg = (*sqr_reg & ~mask) | val;
-}
-
-static void adc_configure(int ain_id)
-{
-	/* Set ADC channel */
-	adc_set_channel(0, ain_id);
-
-	/* Disable DMA */
-	STM32_ADC_CR2 &= ~BIT(8);
-
-	/* Disable scan mode */
-	STM32_ADC_CR1 &= ~BIT(8);
-}
-
-static void adc_configure_all(void)
-{
-	int i;
-
-	/* Set ADC channels */
-	STM32_ADC_SQR1 = (ADC_CH_COUNT - 1) << 20;
-	for (i = 0; i < ADC_CH_COUNT; ++i)
-		adc_set_channel(i, adc_channels[i].channel);
-
-	/* Enable DMA */
-	STM32_ADC_CR2 |= BIT(8);
-
-	/* Enable scan mode */
-	STM32_ADC_CR1 |= BIT(8);
-}
-
-static inline int adc_powered(void)
-{
-	return STM32_ADC_SR & BIT(6); /* ADONS */
-}
-
-static void adc_enable_clock(void)
-{
-	STM32_RCC_APB2ENR |= BIT(9);
-	/* ADCCLK = HSI / 2 = 8MHz*/
-	STM32_ADC_CCR |= BIT(16);
-}
-
-static void adc_init(void)
-{
-	/*
-	 * For STM32L, ADC clock source is HSI/2 = 8 MHz. HSI must be enabled
-	 * for ADC.
-	 *
-	 * Note that we are not powering on ADC on EC initialization because
-	 * STM32L ADC module requires HSI clock. Instead, ADC module is powered
-	 * on/off in adc_prepare()/adc_release().
-	 */
-
-	/* Enable ADC clock. */
-	adc_enable_clock();
-
-	if (!adc_powered())
-		/* Power on ADC module */
-		STM32_ADC_CR2 |= BIT(0);  /* ADON */
-
-	/* Set right alignment */
-	STM32_ADC_CR2 &= ~BIT(11);
-
-	/*
-	 * Set sample time of all channels to 16 cycles.
-	 * Conversion takes (12+16)/8M = 3.34 us.
-	 */
-	STM32_ADC_SMPR1 = 0x24924892;
-	STM32_ADC_SMPR2 = 0x24924892;
-	STM32_ADC_SMPR3 = 0x24924892;
-}
-
-static void adc_prepare(void)
-{
-	if (!adc_powered()) {
-		clock_enable_module(MODULE_ADC, 1);
-		adc_init();
-		restore_clock = 1;
-	}
-}
-
-static void adc_release(void)
-{
-	if (restore_clock) {
-		clock_enable_module(MODULE_ADC, 0);
-		restore_clock = 0;
-	}
-
-	/*
-	 * Power down the ADC.  The ADC consumes a non-trivial amount of power,
-	 * so it's wasteful to leave it on.
-	 */
-	if (adc_powered())
-		STM32_ADC_CR2 = 0;
-}
-
-static inline int adc_conversion_ended(void)
-{
-	return STM32_ADC_SR & BIT(1);
-}
-
-int adc_read_channel(enum adc_channel ch)
-{
-	const struct adc_t *adc = adc_channels + ch;
-	int value;
-	timestamp_t deadline;
-
-	mutex_lock(&adc_lock);
-
-	adc_prepare();
-
-	adc_configure(adc->channel);
-
-	/* Clear EOC bit */
-	STM32_ADC_SR &= ~BIT(1);
-
-	/* Start conversion */
-	STM32_ADC_CR2 |= BIT(30); /* SWSTART */
-
-	/* Wait for EOC bit set */
-	deadline.val = get_time().val + ADC_SINGLE_READ_TIMEOUT;
-	value = ADC_READ_ERROR;
-	do {
-		if (adc_conversion_ended()) {
-			value = STM32_ADC_DR & ADC_READ_MAX;
-			break;
-		}
-	} while (!timestamp_expired(deadline, NULL));
-
-	adc_release();
-
-	mutex_unlock(&adc_lock);
-	return (value == ADC_READ_ERROR) ? ADC_READ_ERROR :
-	       value * adc->factor_mul / adc->factor_div + adc->shift;
-}