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serial: max310x: Add MAX3109 support

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This patch adds support for MAX3109 (advanced dual universal asynchronous
receiver-transmitter) into max310x 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
2013-06-29 10:44:18 +04:00
committed by Greg Kroah-Hartman
parent 10d8b34a42
commit 21fc509f11
3 changed files with 34 additions and 7 deletions
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35
drivers/tty/serial/max310x.c
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@@ -1,5 +1,5 @@
/*
* Maxim (Dallas) MAX3107/8 serial driver
* Maxim (Dallas) MAX3107/8/9 serial driver
*
* Copyright (C) 2012-2013 Alexander Shiyan <shc_work@mail.ru>
*
@@ -13,9 +13,6 @@
* (at your option) any later version.
*/
/* TODO: MAX3109 support (Dual) */
/* TODO: MAX14830 support (Quad) */
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/device.h>
@@ -269,6 +266,9 @@
/* MAX3107 specific */
#define MAX3107_REV_ID (0xa0)
/* MAX3109 specific */
#define MAX3109_REV_ID (0xc0)
struct max310x_devtype {
char name[9];
int nr;
@@ -359,6 +359,25 @@ static int max3108_detect(struct device *dev)
return 0;
}
static int max3109_detect(struct device *dev)
{
struct max310x_port *s = dev_get_drvdata(dev);
unsigned int val = 0;
int ret;
ret = regmap_read(s->regmap, MAX310X_REVID_REG, &val);
if (ret)
return ret;
if (((val & MAX310x_REV_MASK) != MAX3109_REV_ID)) {
dev_err(dev,
"%s ID 0x%02x does not match\n", s->devtype->name, val);
return -ENODEV;
}
return 0;
}
static void max310x_power(struct uart_port *port, int on)
{
max310x_port_update(port, MAX310X_MODE1_REG,
@@ -382,6 +401,13 @@ static const struct max310x_devtype max3108_devtype = {
.power = max310x_power,
};
static const struct max310x_devtype max3109_devtype = {
.name = "MAX3109",
.nr = 2,
.detect = max3109_detect,
.power = max310x_power,
};
static bool max310x_reg_writeable(struct device *dev, unsigned int reg)
{
switch (reg & 0x1f) {
@@ -1226,6 +1252,7 @@ static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume);
static const struct spi_device_id max310x_id_table[] = {
{ "max3107", (kernel_ulong_t)&max3107_devtype, },
{ "max3108", (kernel_ulong_t)&max3108_devtype, },
{ "max3109", (kernel_ulong_t)&max3109_devtype, },
{ }
};
MODULE_DEVICE_TABLE(spi, max310x_id_table);