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can: tcan4x5x: move regmap code into seperate file
This patch moves the regmap code into a seperate file. Reviewed-by: Dan Murphy <dmurphy@ti.com> Tested-by: Sean Nyekjaer <sean@geanix.com> Link: https://lore.kernel.org/r/20201215231746.1132907-5-mkl@pengutronix.de Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| // SPDX-License-Identifier: GPL-2.0 | ||
| // | ||
| // tcan4x5x - Texas Instruments TCAN4x5x Family CAN controller driver | ||
| // | ||
| // Copyright (c) 2020 Pengutronix, | ||
| // Marc Kleine-Budde <kernel@pengutronix.de> | ||
| // Copyright (c) 2018-2019 Texas Instruments Incorporated | ||
| // http://www.ti.com/ | ||
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| #include "tcan4x5x.h" | ||
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| #define TCAN4X5X_WRITE_CMD (0x61 << 24) | ||
| #define TCAN4X5X_READ_CMD (0x41 << 24) | ||
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| #define TCAN4X5X_MAX_REGISTER 0x8fff | ||
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| static int regmap_spi_gather_write(void *context, const void *reg, | ||
| size_t reg_len, const void *val, | ||
| size_t val_len) | ||
| { | ||
| struct device *dev = context; | ||
| struct spi_device *spi = to_spi_device(dev); | ||
| struct spi_message m; | ||
| u32 addr; | ||
| struct spi_transfer t[2] = { | ||
| { .tx_buf = &addr, .len = reg_len, .cs_change = 0,}, | ||
| { .tx_buf = val, .len = val_len, }, | ||
| }; | ||
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| addr = TCAN4X5X_WRITE_CMD | (*((u16 *)reg) << 8) | val_len >> 2; | ||
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| spi_message_init(&m); | ||
| spi_message_add_tail(&t[0], &m); | ||
| spi_message_add_tail(&t[1], &m); | ||
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| return spi_sync(spi, &m); | ||
| } | ||
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| static int tcan4x5x_regmap_write(void *context, const void *data, size_t count) | ||
| { | ||
| u16 *reg = (u16 *)(data); | ||
| const u32 *val = data + 4; | ||
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| return regmap_spi_gather_write(context, reg, 4, val, count - 4); | ||
| } | ||
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| static int regmap_spi_async_write(void *context, | ||
| const void *reg, size_t reg_len, | ||
| const void *val, size_t val_len, | ||
| struct regmap_async *a) | ||
| { | ||
| return -ENOTSUPP; | ||
| } | ||
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| static struct regmap_async *regmap_spi_async_alloc(void) | ||
| { | ||
| return NULL; | ||
| } | ||
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| static int tcan4x5x_regmap_read(void *context, | ||
| const void *reg, size_t reg_size, | ||
| void *val, size_t val_size) | ||
| { | ||
| struct device *dev = context; | ||
| struct spi_device *spi = to_spi_device(dev); | ||
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| u32 addr = TCAN4X5X_READ_CMD | (*((u16 *)reg) << 8) | val_size >> 2; | ||
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| return spi_write_then_read(spi, &addr, reg_size, (u32 *)val, val_size); | ||
| } | ||
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| static const struct regmap_config tcan4x5x_regmap = { | ||
| .reg_bits = 32, | ||
| .val_bits = 32, | ||
| .cache_type = REGCACHE_NONE, | ||
| .max_register = TCAN4X5X_MAX_REGISTER, | ||
| }; | ||
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| static struct regmap_bus tcan4x5x_bus = { | ||
| .write = tcan4x5x_regmap_write, | ||
| .gather_write = regmap_spi_gather_write, | ||
| .async_write = regmap_spi_async_write, | ||
| .async_alloc = regmap_spi_async_alloc, | ||
| .read = tcan4x5x_regmap_read, | ||
| .read_flag_mask = 0x00, | ||
| .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, | ||
| .val_format_endian_default = REGMAP_ENDIAN_NATIVE, | ||
| }; | ||
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| int tcan4x5x_regmap_init(struct tcan4x5x_priv *priv) | ||
| { | ||
| priv->regmap = devm_regmap_init(&priv->spi->dev, &tcan4x5x_bus, | ||
| &priv->spi->dev, &tcan4x5x_regmap); | ||
| return PTR_ERR_OR_ZERO(priv->regmap); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| /* SPDX-License-Identifier: GPL-2.0 | ||
| * | ||
| * tcan4x5x - Texas Instruments TCAN4x5x Family CAN controller driver | ||
| * | ||
| * Copyright (c) 2020 Pengutronix, | ||
| * Marc Kleine-Budde <kernel@pengutronix.de> | ||
| */ | ||
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| #ifndef _TCAN4X5X_H | ||
| #define _TCAN4X5X_H | ||
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| #include <linux/gpio/consumer.h> | ||
| #include <linux/regmap.h> | ||
| #include <linux/regmap.h> | ||
| #include <linux/regulator/consumer.h> | ||
| #include <linux/spi/spi.h> | ||
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| #include "m_can.h" | ||
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| struct tcan4x5x_priv { | ||
| struct m_can_classdev cdev; | ||
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| struct regmap *regmap; | ||
| struct spi_device *spi; | ||
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| struct gpio_desc *reset_gpio; | ||
| struct gpio_desc *device_wake_gpio; | ||
| struct gpio_desc *device_state_gpio; | ||
| struct regulator *power; | ||
| }; | ||
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| int tcan4x5x_regmap_init(struct tcan4x5x_priv *priv); | ||
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| #endif |