Djam/u-boot
1
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2025-05-08 10:39:08 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

adc: Add driver for STM32 ADC

Browse source 
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>
This commit is contained in:
Fabrice Gasnier 2018-07-24 16:31:31 +02:00 • committed by Tom Rini
parent fb4e674a4b
commit a466ecec48
5 changed files with 534 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

51
drivers/adc/stm32-adc-core.h Normal file
View file

@ -0,0 +1,51 @@
/* 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