This patch permits to use GPIOs to control the CTS/RTS/DTR/DSR/DCD/RI signals.
Signed-off-by: Alexander Shiyan <[email protected]> --- .../bindings/serial/cirrus,clps711x-uart.txt | 7 +++-- drivers/tty/serial/Kconfig | 1 + drivers/tty/serial/clps711x.c | 32 +++++++--------------- 3 files changed, 16 insertions(+), 24 deletions(-) diff --git a/Documentation/devicetree/bindings/serial/cirrus,clps711x-uart.txt b/Documentation/devicetree/bindings/serial/cirrus,clps711x-uart.txt index 12f3cf8..caaeb25 100644 --- a/Documentation/devicetree/bindings/serial/cirrus,clps711x-uart.txt +++ b/Documentation/devicetree/bindings/serial/cirrus,clps711x-uart.txt @@ -8,7 +8,8 @@ Required properties: - syscon: Phandle to SYSCON node, which contain UART control bits. Optional properties: -- uart-use-ms: Indicate the UART has modem signal (DCD, DSR, CTS). +- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD + line respectively. Note: Each UART port should have an alias correctly numbered in "aliases" node. @@ -24,5 +25,7 @@ Example: interrupts = <12 13>; clocks = <&clks 11>; syscon = <&syscon1>; - uart-use-ms; + cts-gpios = <&sysgpio 0 GPIO_ACTIVE_LOW>; + dsr-gpios = <&sysgpio 1 GPIO_ACTIVE_LOW>; + dcd-gpios = <&sysgpio 2 GPIO_ACTIVE_LOW>; }; diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 26cec64..75cc59f 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -204,6 +204,7 @@ config SERIAL_CLPS711X tristate "CLPS711X serial port support" depends on ARCH_CLPS711X || COMPILE_TEST select SERIAL_CORE + select SERIAL_MCTRL_GPIO help This enables the driver for the on-chip UARTs of the Cirrus Logic EP711x/EP721x/EP731x processors. diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c index f5b4c3d..acfe317 100644 --- a/drivers/tty/serial/clps711x.c +++ b/drivers/tty/serial/clps711x.c @@ -33,6 +33,8 @@ #include <linux/mfd/syscon.h> #include <linux/mfd/syscon/clps711x.h> +#include "serial_mctrl_gpio.h" + #define UART_CLPS711X_DEVNAME "ttyCL" #define UART_CLPS711X_NR 2 #define UART_CLPS711X_MAJOR 204 @@ -62,7 +64,7 @@ struct clps711x_port { unsigned int tx_enabled; int rx_irq; struct regmap *syscon; - bool use_ms; + struct mctrl_gpios *gpios; }; static struct uart_driver clps711x_uart = { @@ -198,28 +200,17 @@ static unsigned int uart_clps711x_tx_empty(struct uart_port *port) static unsigned int uart_clps711x_get_mctrl(struct uart_port *port) { + unsigned int result = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; struct clps711x_port *s = dev_get_drvdata(port->dev); - unsigned int result = 0; - - if (s->use_ms) { - u32 sysflg = 0; - - regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); - if (sysflg & SYSFLG1_DCD) - result |= TIOCM_CAR; - if (sysflg & SYSFLG1_DSR) - result |= TIOCM_DSR; - if (sysflg & SYSFLG1_CTS) - result |= TIOCM_CTS; - } else - result = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; - return result; + return mctrl_gpio_get(s->gpios, &result); } static void uart_clps711x_set_mctrl(struct uart_port *port, unsigned int mctrl) { - /* Do nothing */ + struct clps711x_port *s = dev_get_drvdata(port->dev); + + mctrl_gpio_set(s->gpios, mctrl); } static void uart_clps711x_break_ctl(struct uart_port *port, int break_state) @@ -490,15 +481,10 @@ static int uart_clps711x_probe(struct platform_device *pdev) s->syscon = syscon_regmap_lookup_by_pdevname(syscon_name); if (IS_ERR(s->syscon)) return PTR_ERR(s->syscon); - - s->use_ms = !index; } else { s->syscon = syscon_regmap_lookup_by_phandle(np, "syscon"); if (IS_ERR(s->syscon)) return PTR_ERR(s->syscon); - - if (!index) - s->use_ms = of_property_read_bool(np, "uart-use-ms"); } s->port.line = index; @@ -513,6 +499,8 @@ static int uart_clps711x_probe(struct platform_device *pdev) platform_set_drvdata(pdev, s); + s->gpios = mctrl_gpio_init(&pdev->dev, 0); + ret = uart_add_one_port(&clps711x_uart, &s->port); if (ret) return ret; -- 1.8.5.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
