diff options
| author | Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | 2013-11-26 14:11:00 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-02-12 14:36:02 +0400 |
| commit | eb02313d2c96e1793cf37693d432fd2c129ae170 (patch) | |
| tree | 152973303b3644f77985f7e7646c236d7c0b6dfd /arch/arm/mach-sa1100/h3xxx.c | |
| parent | 162e68c08c916d0b701331a85291537fed2ad537 (diff) | |
| download | linux-eb02313d2c96e1793cf37693d432fd2c129ae170.tar.xz | |
ARM: 7902/1: sa1100: h3xxx: move serial port GPIO handling to common place
Both h3100 and h3600 request UART gpios during init_machine time. As
sa1100 gpio driver is going to become proper machine driver, move gpio
handling to UART port functions. Request all gpios using gpio_request
array once and then guard them from rerequesting with bool variable.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-sa1100/h3xxx.c')
| -rw-r--r-- | arch/arm/mach-sa1100/h3xxx.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/h3xxx.c b/arch/arm/mach-sa1100/h3xxx.c index f17e7382242a..82e87024b1a6 100644 --- a/arch/arm/mach-sa1100/h3xxx.c +++ b/arch/arm/mach-sa1100/h3xxx.c @@ -116,9 +116,34 @@ static struct resource h3xxx_flash_resource = /* * H3xxx uart support */ +static struct gpio h3xxx_uart_gpio[] = { + { H3XXX_GPIO_COM_DCD, GPIOF_IN, "COM DCD" }, + { H3XXX_GPIO_COM_CTS, GPIOF_IN, "COM CTS" }, + { H3XXX_GPIO_COM_RTS, GPIOF_OUT_INIT_LOW, "COM RTS" }, +}; + +static bool h3xxx_uart_request_gpios(void) +{ + static bool h3xxx_uart_gpio_ok; + int rc; + + if (h3xxx_uart_gpio_ok) + return true; + + rc = gpio_request_array(h3xxx_uart_gpio, ARRAY_SIZE(h3xxx_uart_gpio)); + if (rc) + pr_err("h3xxx_uart_request_gpios: error %d\n", rc); + else + h3xxx_uart_gpio_ok = true; + + return h3xxx_uart_gpio_ok; +} + static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl) { if (port->mapbase == _Ser3UTCR0) { + if (!h3xxx_uart_request_gpios()) + return; gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS)); } } @@ -128,6 +153,8 @@ static u_int h3xxx_uart_get_mctrl(struct uart_port *port) u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; if (port->mapbase == _Ser3UTCR0) { + if (!h3xxx_uart_request_gpios()) + return ret; /* * DCD and CTS bits are inverted in GPLR by RS232 transceiver */ |