pinctrl: mcp23s08: Consolidate SPI and I²C code
There are three parts of each, SPI and I²C, driver spread over the code under ifdeffery. Consolidate them so it will be only one for SPI and one for I²C. The code has been cosmetically changed to avoid intrusive change. Clean up is considered in the nearest future. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20200407173849.43628-3-andriy.shevchenko@linux.intel.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko
Linus Walleij
Родитель
84d02e785d
Коммит
d3da29b628
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@ -27,8 +27,6 @@
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#define MCP_TYPE_S18 4
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#define MCP_TYPE_018 5
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#define MCP_MAX_DEV_PER_CS 8
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/* Registers are all 8 bits wide.
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*
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* The mcp23s17 has twice as many bits, and can be configured to work
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@ -308,80 +306,6 @@ static const struct pinconf_ops mcp_pinconf_ops = {
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/*----------------------------------------------------------------------*/
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#ifdef CONFIG_SPI_MASTER
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static int mcp23sxx_spi_write(void *context, const void *data, size_t count)
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{
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struct mcp23s08 *mcp = context;
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struct spi_device *spi = to_spi_device(mcp->dev);
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struct spi_message m;
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struct spi_transfer t[2] = { { .tx_buf = &mcp->addr, .len = 1, },
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{ .tx_buf = data, .len = count, }, };
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spi_message_init(&m);
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spi_message_add_tail(&t[0], &m);
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spi_message_add_tail(&t[1], &m);
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return spi_sync(spi, &m);
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}
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static int mcp23sxx_spi_gather_write(void *context,
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const void *reg, size_t reg_size,
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const void *val, size_t val_size)
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{
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struct mcp23s08 *mcp = context;
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struct spi_device *spi = to_spi_device(mcp->dev);
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struct spi_message m;
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struct spi_transfer t[3] = { { .tx_buf = &mcp->addr, .len = 1, },
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{ .tx_buf = reg, .len = reg_size, },
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{ .tx_buf = val, .len = val_size, }, };
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spi_message_init(&m);
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spi_message_add_tail(&t[0], &m);
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spi_message_add_tail(&t[1], &m);
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spi_message_add_tail(&t[2], &m);
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return spi_sync(spi, &m);
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}
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static int mcp23sxx_spi_read(void *context, const void *reg, size_t reg_size,
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void *val, size_t val_size)
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{
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struct mcp23s08 *mcp = context;
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struct spi_device *spi = to_spi_device(mcp->dev);
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u8 tx[2];
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if (reg_size != 1)
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return -EINVAL;
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tx[0] = mcp->addr | 0x01;
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tx[1] = *((u8 *) reg);
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return spi_write_then_read(spi, tx, sizeof(tx), val, val_size);
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}
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static const struct regmap_bus mcp23sxx_spi_regmap = {
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.write = mcp23sxx_spi_write,
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.gather_write = mcp23sxx_spi_gather_write,
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.read = mcp23sxx_spi_read,
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};
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#endif /* CONFIG_SPI_MASTER */
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/*----------------------------------------------------------------------*/
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/* A given spi_device can represent up to eight mcp23sxx chips
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* sharing the same chipselect but using different addresses
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* (e.g. chips #0 and #3 might be populated, but not #1 or $2).
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* Driver data holds all the per-chip data.
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*/
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struct mcp23s08_driver_data {
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unsigned ngpio;
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struct mcp23s08 *mcp[8];
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struct mcp23s08 chip[];
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};
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static int mcp23s08_direction_input(struct gpio_chip *chip, unsigned offset)
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{
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struct mcp23s08 *mcp = gpiochip_get_data(chip);
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@ -656,14 +580,12 @@ static int mcp23s08_irqchip_setup(struct mcp23s08 *mcp)
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/*----------------------------------------------------------------------*/
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static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
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void *data, unsigned addr, unsigned type,
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unsigned int addr, unsigned int type,
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unsigned int base, int cs)
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{
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int status, ret;
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bool mirror = false;
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bool open_drain = false;
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struct regmap_config *one_regmap_config = NULL;
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int raw_chip_address = (addr & ~0x40) >> 1;
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mutex_init(&mcp->lock);
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@ -687,83 +609,6 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
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mcp->chip.of_node = dev->of_node;
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#endif
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switch (type) {
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#ifdef CONFIG_SPI_MASTER
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case MCP_TYPE_S08:
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case MCP_TYPE_S17:
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switch (type) {
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case MCP_TYPE_S08:
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one_regmap_config =
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devm_kmemdup(dev, &mcp23x08_regmap,
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sizeof(struct regmap_config), GFP_KERNEL);
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mcp->reg_shift = 0;
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mcp->chip.ngpio = 8;
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mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL,
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"mcp23s08.%d", raw_chip_address);
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break;
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case MCP_TYPE_S17:
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one_regmap_config =
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devm_kmemdup(dev, &mcp23x17_regmap,
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sizeof(struct regmap_config), GFP_KERNEL);
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mcp->reg_shift = 1;
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mcp->chip.ngpio = 16;
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mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL,
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"mcp23s17.%d", raw_chip_address);
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break;
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}
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if (!one_regmap_config)
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return -ENOMEM;
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one_regmap_config->name = devm_kasprintf(dev, GFP_KERNEL, "%d", raw_chip_address);
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mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp,
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one_regmap_config);
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break;
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case MCP_TYPE_S18:
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one_regmap_config =
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devm_kmemdup(dev, &mcp23x17_regmap,
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sizeof(struct regmap_config), GFP_KERNEL);
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if (!one_regmap_config)
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return -ENOMEM;
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mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp,
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one_regmap_config);
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mcp->reg_shift = 1;
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mcp->chip.ngpio = 16;
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mcp->chip.label = "mcp23s18";
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break;
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#endif /* CONFIG_SPI_MASTER */
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#if IS_ENABLED(CONFIG_I2C)
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case MCP_TYPE_008:
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mcp->regmap = devm_regmap_init_i2c(data, &mcp23x08_regmap);
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mcp->reg_shift = 0;
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mcp->chip.ngpio = 8;
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mcp->chip.label = "mcp23008";
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break;
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case MCP_TYPE_017:
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mcp->regmap = devm_regmap_init_i2c(data, &mcp23x17_regmap);
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mcp->reg_shift = 1;
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mcp->chip.ngpio = 16;
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mcp->chip.label = "mcp23017";
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break;
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case MCP_TYPE_018:
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mcp->regmap = devm_regmap_init_i2c(data, &mcp23x17_regmap);
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mcp->reg_shift = 1;
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mcp->chip.ngpio = 16;
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mcp->chip.label = "mcp23018";
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break;
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#endif /* CONFIG_I2C */
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default:
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dev_err(dev, "invalid device type (%d)\n", type);
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return -EINVAL;
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}
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if (IS_ERR(mcp->regmap))
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return PTR_ERR(mcp->regmap);
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mcp->chip.base = base;
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mcp->chip.can_sleep = true;
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mcp->chip.parent = dev;
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@ -822,14 +667,6 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
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goto fail;
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}
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if (one_regmap_config) {
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mcp->pinctrl_desc.name = devm_kasprintf(dev, GFP_KERNEL,
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"mcp23xxx-pinctrl.%d", raw_chip_address);
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if (!mcp->pinctrl_desc.name)
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return -ENOMEM;
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} else {
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mcp->pinctrl_desc.name = "mcp23xxx-pinctrl";
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}
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mcp->pinctrl_desc.pctlops = &mcp_pinctrl_ops;
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mcp->pinctrl_desc.confops = &mcp_pinconf_ops;
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mcp->pinctrl_desc.npins = mcp->chip.ngpio;
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@ -856,36 +693,72 @@ fail:
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/*----------------------------------------------------------------------*/
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#ifdef CONFIG_OF
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#ifdef CONFIG_SPI_MASTER
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static const struct of_device_id mcp23s08_spi_of_match[] = {
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{
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.compatible = "microchip,mcp23s08",
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.data = (void *) MCP_TYPE_S08,
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},
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{
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.compatible = "microchip,mcp23s17",
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.data = (void *) MCP_TYPE_S17,
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},
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{
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.compatible = "microchip,mcp23s18",
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.data = (void *) MCP_TYPE_S18,
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},
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/* NOTE: The use of the mcp prefix is deprecated and will be removed. */
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{
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.compatible = "mcp,mcp23s08",
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.data = (void *) MCP_TYPE_S08,
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},
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{
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.compatible = "mcp,mcp23s17",
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.data = (void *) MCP_TYPE_S17,
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},
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#if IS_ENABLED(CONFIG_I2C)
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static int mcp230xx_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct device *dev = &client->dev;
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unsigned int type = id->driver_data;
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struct mcp23s08 *mcp;
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int status;
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mcp = devm_kzalloc(&client->dev, sizeof(*mcp), GFP_KERNEL);
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if (!mcp)
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return -ENOMEM;
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mcp->irq = client->irq;
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switch (type) {
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case MCP_TYPE_008:
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mcp->regmap = devm_regmap_init_i2c(client, &mcp23x08_regmap);
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mcp->reg_shift = 0;
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mcp->chip.ngpio = 8;
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mcp->chip.label = "mcp23008";
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break;
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case MCP_TYPE_017:
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mcp->regmap = devm_regmap_init_i2c(client, &mcp23x17_regmap);
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mcp->reg_shift = 1;
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mcp->chip.ngpio = 16;
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mcp->chip.label = "mcp23017";
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break;
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case MCP_TYPE_018:
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mcp->regmap = devm_regmap_init_i2c(client, &mcp23x17_regmap);
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mcp->reg_shift = 1;
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mcp->chip.ngpio = 16;
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mcp->chip.label = "mcp23018";
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break;
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default:
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dev_err(dev, "invalid device type (%d)\n", type);
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return -EINVAL;
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}
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if (IS_ERR(mcp->regmap))
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return PTR_ERR(mcp->regmap);
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mcp->pinctrl_desc.name = "mcp23xxx-pinctrl";
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status = mcp23s08_probe_one(mcp, dev, client->addr, type, -1, 0);
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if (status)
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return status;
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i2c_set_clientdata(client, mcp);
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return 0;
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}
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static const struct i2c_device_id mcp230xx_id[] = {
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{ "mcp23008", MCP_TYPE_008 },
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{ "mcp23017", MCP_TYPE_017 },
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{ "mcp23018", MCP_TYPE_018 },
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{ },
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};
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MODULE_DEVICE_TABLE(of, mcp23s08_spi_of_match);
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#endif
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MODULE_DEVICE_TABLE(i2c, mcp230xx_id);
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#if IS_ENABLED(CONFIG_I2C)
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#ifdef CONFIG_OF
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static const struct of_device_id mcp23s08_i2c_of_match[] = {
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{
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.compatible = "microchip,mcp23008",
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@ -911,42 +784,8 @@ static const struct of_device_id mcp23s08_i2c_of_match[] = {
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{ },
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};
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MODULE_DEVICE_TABLE(of, mcp23s08_i2c_of_match);
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#endif
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#endif /* CONFIG_OF */
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#if IS_ENABLED(CONFIG_I2C)
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static int mcp230xx_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct mcp23s08 *mcp;
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int status;
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mcp = devm_kzalloc(&client->dev, sizeof(*mcp), GFP_KERNEL);
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if (!mcp)
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return -ENOMEM;
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mcp->irq = client->irq;
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status = mcp23s08_probe_one(mcp, &client->dev, client, client->addr,
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id->driver_data, -1, 0);
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if (status)
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return status;
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i2c_set_clientdata(client, mcp);
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return 0;
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}
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static const struct i2c_device_id mcp230xx_id[] = {
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{ "mcp23008", MCP_TYPE_008 },
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{ "mcp23017", MCP_TYPE_017 },
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{ "mcp23018", MCP_TYPE_018 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, mcp230xx_id);
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static struct i2c_driver mcp230xx_driver = {
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.driver = {
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.name = "mcp230xx",
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@ -977,8 +816,138 @@ static void mcp23s08_i2c_exit(void) { }
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#ifdef CONFIG_SPI_MASTER
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#define MCP_MAX_DEV_PER_CS 8
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static int mcp23sxx_spi_write(void *context, const void *data, size_t count)
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{
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struct mcp23s08 *mcp = context;
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struct spi_device *spi = to_spi_device(mcp->dev);
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struct spi_message m;
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struct spi_transfer t[2] = { { .tx_buf = &mcp->addr, .len = 1, },
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{ .tx_buf = data, .len = count, }, };
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spi_message_init(&m);
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spi_message_add_tail(&t[0], &m);
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spi_message_add_tail(&t[1], &m);
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return spi_sync(spi, &m);
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}
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static int mcp23sxx_spi_gather_write(void *context,
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const void *reg, size_t reg_size,
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const void *val, size_t val_size)
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{
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struct mcp23s08 *mcp = context;
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struct spi_device *spi = to_spi_device(mcp->dev);
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struct spi_message m;
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struct spi_transfer t[3] = { { .tx_buf = &mcp->addr, .len = 1, },
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{ .tx_buf = reg, .len = reg_size, },
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{ .tx_buf = val, .len = val_size, }, };
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spi_message_init(&m);
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spi_message_add_tail(&t[0], &m);
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spi_message_add_tail(&t[1], &m);
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spi_message_add_tail(&t[2], &m);
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return spi_sync(spi, &m);
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}
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static int mcp23sxx_spi_read(void *context, const void *reg, size_t reg_size,
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void *val, size_t val_size)
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{
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struct mcp23s08 *mcp = context;
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struct spi_device *spi = to_spi_device(mcp->dev);
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u8 tx[2];
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if (reg_size != 1)
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return -EINVAL;
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tx[0] = mcp->addr | 0x01;
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tx[1] = *((u8 *) reg);
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return spi_write_then_read(spi, tx, sizeof(tx), val, val_size);
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}
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static const struct regmap_bus mcp23sxx_spi_regmap = {
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.write = mcp23sxx_spi_write,
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.gather_write = mcp23sxx_spi_gather_write,
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.read = mcp23sxx_spi_read,
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};
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|
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/* A given spi_device can represent up to eight mcp23sxx chips
|
||||
* sharing the same chipselect but using different addresses
|
||||
* (e.g. chips #0 and #3 might be populated, but not #1 or $2).
|
||||
* Driver data holds all the per-chip data.
|
||||
*/
|
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struct mcp23s08_driver_data {
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unsigned ngpio;
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struct mcp23s08 *mcp[8];
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struct mcp23s08 chip[];
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};
|
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|
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static int mcp23s08_spi_regmap_init(struct mcp23s08 *mcp, struct device *dev,
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unsigned int addr, unsigned int type)
|
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{
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struct regmap_config *one_regmap_config = NULL;
|
||||
|
||||
switch (type) {
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case MCP_TYPE_S08:
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case MCP_TYPE_S17:
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||||
switch (type) {
|
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case MCP_TYPE_S08:
|
||||
one_regmap_config =
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devm_kmemdup(dev, &mcp23x08_regmap,
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sizeof(struct regmap_config), GFP_KERNEL);
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mcp->reg_shift = 0;
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||||
mcp->chip.ngpio = 8;
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mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL,
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"mcp23s08.%d", addr);
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break;
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||||
case MCP_TYPE_S17:
|
||||
one_regmap_config =
|
||||
devm_kmemdup(dev, &mcp23x17_regmap,
|
||||
sizeof(struct regmap_config), GFP_KERNEL);
|
||||
mcp->reg_shift = 1;
|
||||
mcp->chip.ngpio = 16;
|
||||
mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL,
|
||||
"mcp23s17.%d", addr);
|
||||
break;
|
||||
}
|
||||
if (!one_regmap_config)
|
||||
return -ENOMEM;
|
||||
|
||||
one_regmap_config->name = devm_kasprintf(dev, GFP_KERNEL, "%d", addr);
|
||||
mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp,
|
||||
one_regmap_config);
|
||||
break;
|
||||
|
||||
case MCP_TYPE_S18:
|
||||
one_regmap_config =
|
||||
devm_kmemdup(dev, &mcp23x17_regmap,
|
||||
sizeof(struct regmap_config), GFP_KERNEL);
|
||||
if (!one_regmap_config)
|
||||
return -ENOMEM;
|
||||
mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp,
|
||||
one_regmap_config);
|
||||
mcp->reg_shift = 1;
|
||||
mcp->chip.ngpio = 16;
|
||||
mcp->chip.label = "mcp23s18";
|
||||
break;
|
||||
|
||||
default:
|
||||
dev_err(dev, "invalid device type (%d)\n", type);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (IS_ERR(mcp->regmap))
|
||||
return PTR_ERR(mcp->regmap);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mcp23s08_probe(struct spi_device *spi)
|
||||
{
|
||||
struct device *dev = &spi->dev;
|
||||
unsigned addr;
|
||||
int chips = 0;
|
||||
struct mcp23s08_driver_data *data;
|
||||
|
|
@ -1030,9 +999,17 @@ static int mcp23s08_probe(struct spi_device *spi)
|
|||
chips--;
|
||||
data->mcp[addr] = &data->chip[chips];
|
||||
data->mcp[addr]->irq = spi->irq;
|
||||
status = mcp23s08_probe_one(data->mcp[addr], &spi->dev, spi,
|
||||
0x40 | (addr << 1), type,
|
||||
-1, addr);
|
||||
|
||||
status = mcp23s08_spi_regmap_init(data->mcp[addr], dev, addr, type);
|
||||
if (status)
|
||||
return status;
|
||||
|
||||
data->mcp[addr]->pinctrl_desc.name = devm_kasprintf(dev, GFP_KERNEL,
|
||||
"mcp23xxx-pinctrl.%d", addr);
|
||||
if (!data->mcp[addr]->pinctrl_desc.name)
|
||||
return -ENOMEM;
|
||||
|
||||
status = mcp23s08_probe_one(data->mcp[addr], dev, 0x40 | (addr << 1), type, -1, addr);
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
|
|
@ -1051,6 +1028,34 @@ static const struct spi_device_id mcp23s08_ids[] = {
|
|||
};
|
||||
MODULE_DEVICE_TABLE(spi, mcp23s08_ids);
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static const struct of_device_id mcp23s08_spi_of_match[] = {
|
||||
{
|
||||
.compatible = "microchip,mcp23s08",
|
||||
.data = (void *) MCP_TYPE_S08,
|
||||
},
|
||||
{
|
||||
.compatible = "microchip,mcp23s17",
|
||||
.data = (void *) MCP_TYPE_S17,
|
||||
},
|
||||
{
|
||||
.compatible = "microchip,mcp23s18",
|
||||
.data = (void *) MCP_TYPE_S18,
|
||||
},
|
||||
/* NOTE: The use of the mcp prefix is deprecated and will be removed. */
|
||||
{
|
||||
.compatible = "mcp,mcp23s08",
|
||||
.data = (void *) MCP_TYPE_S08,
|
||||
},
|
||||
{
|
||||
.compatible = "mcp,mcp23s17",
|
||||
.data = (void *) MCP_TYPE_S17,
|
||||
},
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, mcp23s08_spi_of_match);
|
||||
#endif
|
||||
|
||||
static struct spi_driver mcp23s08_driver = {
|
||||
.probe = mcp23s08_probe,
|
||||
.id_table = mcp23s08_ids,
|
||||
|
|
|
|||
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