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serial: max310x: Add devicetree support 

This patch adds devicetree support for the MAX310X serial driver.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Shiyan 2014-02-10 22:18:36 +04:00 committed by Greg Kroah-Hartman
parent 5f529049cb
commit 58afc90977
1 changed files with 32 additions and 9 deletions
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41
drivers/tty/serial/max310x.c
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@ -19,6 +19,8 @@
#include <linux/device.h> #include <linux/device.h>
#include <linux/gpio.h> #include <linux/gpio.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h> #include <linux/regmap.h>
#include <linux/serial_core.h> #include <linux/serial_core.h>
#include <linux/serial.h> #include <linux/serial.h>
@ -1093,7 +1095,7 @@ static int max310x_gpio_direction_output(struct gpio_chip *chip,
#endif #endif
static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, static int max310x_probe(struct device *dev, struct max310x_devtype *devtype,
struct regmap *regmap, int irq) struct regmap *regmap, int irq, unsigned long flags)
{ {
int i, ret, fmin, fmax, freq, uartclk; int i, ret, fmin, fmax, freq, uartclk;
struct clk *clk_osc, *clk_xtal; struct clk *clk_osc, *clk_xtal;
@ -1237,8 +1239,7 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype,
/* Setup interrupt */ /* Setup interrupt */
ret = devm_request_threaded_irq(dev, irq, NULL, max310x_ist, ret = devm_request_threaded_irq(dev, irq, NULL, max310x_ist,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT, IRQF_ONESHOT | flags, dev_name(dev), s);
dev_name(dev), s);
if (!ret) if (!ret)
return 0; return 0;
@ -1284,6 +1285,15 @@ static int max310x_remove(struct device *dev)
return ret; return ret;
} }
static const struct of_device_id __maybe_unused max310x_dt_ids[] = {
{ .compatible = "maxim,max3107", .data = &max3107_devtype, },
{ .compatible = "maxim,max3108", .data = &max3108_devtype, },
{ .compatible = "maxim,max3109", .data = &max3109_devtype, },
{ .compatible = "maxim,max14830", .data = &max14830_devtype },
{ }
};
MODULE_DEVICE_TABLE(of, max310x_dt_ids);
static struct regmap_config regcfg = { static struct regmap_config regcfg = {
.reg_bits = 8, .reg_bits = 8,
.val_bits = 8, .val_bits = 8,
@ -1297,8 +1307,8 @@ static struct regmap_config regcfg = {
#ifdef CONFIG_SPI_MASTER #ifdef CONFIG_SPI_MASTER
static int max310x_spi_probe(struct spi_device *spi) static int max310x_spi_probe(struct spi_device *spi)
{ {
struct max310x_devtype *devtype = struct max310x_devtype *devtype;
(struct max310x_devtype *)spi_get_device_id(spi)->driver_data; unsigned long flags = 0;
struct regmap *regmap; struct regmap *regmap;
int ret; int ret;
@ -1310,10 +1320,22 @@ static int max310x_spi_probe(struct spi_device *spi)
if (ret) if (ret)
return ret; return ret;
if (spi->dev.of_node) {
const struct of_device_id *of_id =
of_match_device(max310x_dt_ids, &spi->dev);
devtype = (struct max310x_devtype *)of_id->data;
} else {
const struct spi_device_id *id_entry = spi_get_device_id(spi);
devtype = (struct max310x_devtype *)id_entry->driver_data;
flags = IRQF_TRIGGER_FALLING;
}
regcfg.max_register = devtype->nr * 0x20 - 1; regcfg.max_register = devtype->nr * 0x20 - 1;
regmap = devm_regmap_init_spi(spi, &regcfg); regmap = devm_regmap_init_spi(spi, &regcfg);
return max310x_probe(&spi->dev, devtype, regmap, spi->irq); return max310x_probe(&spi->dev, devtype, regmap, spi->irq, flags);
} }
static int max310x_spi_remove(struct spi_device *spi) static int max310x_spi_remove(struct spi_device *spi)
@ -1332,9 +1354,10 @@ MODULE_DEVICE_TABLE(spi, max310x_id_table);
static struct spi_driver max310x_uart_driver = { static struct spi_driver max310x_uart_driver = {
.driver = { .driver = {
.name = MAX310X_NAME, .name = MAX310X_NAME,
.owner = THIS_MODULE, .owner = THIS_MODULE,
.pm = &max310x_pm_ops, .of_match_table = of_match_ptr(max310x_dt_ids),
.pm = &max310x_pm_ops,
}, },
.probe = max310x_spi_probe, .probe = max310x_spi_probe,
.remove = max310x_spi_remove, .remove = max310x_spi_remove,