cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ad5592r-base.h (2046B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * AD5592R / AD5593R Digital <-> Analog converters driver
      4 *
      5 * Copyright 2015-2016 Analog Devices Inc.
      6 * Author: Paul Cercueil <paul.cercueil@analog.com>
      7 */
      8
      9#ifndef __DRIVERS_IIO_DAC_AD5592R_BASE_H__
     10#define __DRIVERS_IIO_DAC_AD5592R_BASE_H__
     11
     12#include <linux/types.h>
     13#include <linux/cache.h>
     14#include <linux/mutex.h>
     15#include <linux/gpio/driver.h>
     16
     17struct device;
     18struct ad5592r_state;
     19
     20enum ad5592r_registers {
     21	AD5592R_REG_NOOP		= 0x0,
     22	AD5592R_REG_DAC_READBACK	= 0x1,
     23	AD5592R_REG_ADC_SEQ		= 0x2,
     24	AD5592R_REG_CTRL		= 0x3,
     25	AD5592R_REG_ADC_EN		= 0x4,
     26	AD5592R_REG_DAC_EN		= 0x5,
     27	AD5592R_REG_PULLDOWN		= 0x6,
     28	AD5592R_REG_LDAC		= 0x7,
     29	AD5592R_REG_GPIO_OUT_EN		= 0x8,
     30	AD5592R_REG_GPIO_SET		= 0x9,
     31	AD5592R_REG_GPIO_IN_EN		= 0xA,
     32	AD5592R_REG_PD			= 0xB,
     33	AD5592R_REG_OPEN_DRAIN		= 0xC,
     34	AD5592R_REG_TRISTATE		= 0xD,
     35	AD5592R_REG_RESET		= 0xF,
     36};
     37
     38#define AD5592R_REG_PD_EN_REF		BIT(9)
     39#define AD5592R_REG_CTRL_ADC_RANGE	BIT(5)
     40#define AD5592R_REG_CTRL_DAC_RANGE	BIT(4)
     41
     42struct ad5592r_rw_ops {
     43	int (*write_dac)(struct ad5592r_state *st, unsigned chan, u16 value);
     44	int (*read_adc)(struct ad5592r_state *st, unsigned chan, u16 *value);
     45	int (*reg_write)(struct ad5592r_state *st, u8 reg, u16 value);
     46	int (*reg_read)(struct ad5592r_state *st, u8 reg, u16 *value);
     47	int (*gpio_read)(struct ad5592r_state *st, u8 *value);
     48};
     49
     50struct ad5592r_state {
     51	struct device *dev;
     52	struct regulator *reg;
     53	struct gpio_chip gpiochip;
     54	struct mutex gpio_lock;	/* Protect cached gpio_out, gpio_val, etc. */
     55	struct mutex lock;
     56	unsigned int num_channels;
     57	const struct ad5592r_rw_ops *ops;
     58	int scale_avail[2][2];
     59	u16 cached_dac[8];
     60	u16 cached_gp_ctrl;
     61	u8 channel_modes[8];
     62	u8 channel_offstate[8];
     63	u8 gpio_map;
     64	u8 gpio_out;
     65	u8 gpio_in;
     66	u8 gpio_val;
     67
     68	__be16 spi_msg ____cacheline_aligned;
     69	__be16 spi_msg_nop;
     70};
     71
     72int ad5592r_probe(struct device *dev, const char *name,
     73		const struct ad5592r_rw_ops *ops);
     74void ad5592r_remove(struct device *dev);
     75
     76#endif /* __DRIVERS_IIO_DAC_AD5592R_BASE_H__ */