mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 10:48:51 +00:00
a466ecec48
This patch adds support for STMicroelectronics STM32 ADC (analog to digital converter). It's originally based on Linux kernel v4.18-rcs drivers/iio/adc/stm32-adc*. It's composed of: - core driver (UCLASS_SIMPLE_BUS) manages common resources (clk, regu). - child drivers (UCLASS_ADC) declare each ADC, channels and handle conversions. This driver currently supports STM32H7 and STM32MP1 ADC. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
|
|
* Author: Fabrice Gasnier <fabrice.gasnier@st.com>.
|
|
*
|
|
* Originally based on the Linux kernel v4.18 drivers/iio/adc/stm32-adc-core.h.
|
|
*/
|
|
|
|
#ifndef __STM32_ADC_H
|
|
#define __STM32_ADC_H
|
|
|
|
/*
|
|
* STM32 - ADC global register map
|
|
* ________________________________________________________
|
|
* | Offset | Register |
|
|
* --------------------------------------------------------
|
|
* | 0x000 | Master ADC1 |
|
|
* --------------------------------------------------------
|
|
* | 0x100 | Slave ADC2 |
|
|
* --------------------------------------------------------
|
|
* | 0x200 | Slave ADC3 |
|
|
* --------------------------------------------------------
|
|
* | 0x300 | Master & Slave common regs |
|
|
* --------------------------------------------------------
|
|
*/
|
|
#define STM32_ADC_MAX_ADCS 3
|
|
#define STM32_ADCX_COMN_OFFSET 0x300
|
|
|
|
#include <common.h>
|
|
#include <clk.h>
|
|
#include <dm.h>
|
|
|
|
/**
|
|
* struct stm32_adc_common - stm32 ADC driver common data (for all instances)
|
|
* @base: control registers base cpu addr
|
|
* @rate: clock rate used for analog circuitry
|
|
* @aclk: clock for the analog circuitry
|
|
* @bclk: bus clock common for all ADCs
|
|
* @vref: regulator reference
|
|
* @vref_uv: reference supply voltage (uV)
|
|
*/
|
|
struct stm32_adc_common {
|
|
void __iomem *base;
|
|
unsigned long rate;
|
|
struct clk aclk;
|
|
struct clk bclk;
|
|
struct udevice *vref;
|
|
int vref_uv;
|
|
};
|
|
|
|
#endif
|