diff options
| author | Fabrice Gasnier <fabrice.gasnier@st.com> | 2018-07-24 16:31:31 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-08-03 19:53:10 -0400 |
| commit | a466ecec483a94ac5c66d3ce6793e1575f333d23 (patch) | |
| tree | c8381d1205420220f91ffd627426b322d35c17d9 /drivers/adc/stm32-adc-core.h | |
| parent | fb4e674a4b01d44fe15ea72c31c84598db11ebc1 (diff) | |
| download | u-boot-a466ecec483a94ac5c66d3ce6793e1575f333d23.tar.gz u-boot-a466ecec483a94ac5c66d3ce6793e1575f333d23.tar.xz u-boot-a466ecec483a94ac5c66d3ce6793e1575f333d23.zip | |
adc: Add driver for STM32 ADC
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>
Diffstat (limited to 'drivers/adc/stm32-adc-core.h')
| -rw-r--r-- | drivers/adc/stm32-adc-core.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/adc/stm32-adc-core.h b/drivers/adc/stm32-adc-core.h new file mode 100644 index 0000000000..ba0e10e6cc --- /dev/null +++ b/drivers/adc/stm32-adc-core.h @@ -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 |