diff options
| author | Alexander Shiyan <shc_work@mail.ru> | 2013-06-29 10:44:18 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-26 15:53:27 -0700 |
| commit | 21fc509f1194c2fa06eff4c72238210089c29453 (patch) | |
| tree | cc458ad72251518283f0b2bd7d93671a338820bd /drivers | |
| parent | 10d8b34a421716d55a4ff7c2d427c35e88b8fd60 (diff) | |
serial: max310x: Add MAX3109 support
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/max310x.c | 35 |
2 files changed, 32 insertions, 5 deletions
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 25772c15276d..8e1a9c53ad7f 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -297,7 +297,7 @@ config SERIAL_MAX310X default n help This selects support for an advanced UART from Maxim (Dallas). - Supported ICs are MAX3107, MAX3108. + Supported ICs are MAX3107, MAX3108, MAX3109. Each IC contains 128 words each of receive and transmit FIFO that can be controlled through I2C or high-speed SPI. diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 4620289e9e49..a6c46427363b 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -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); |