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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-19 17:05:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-19 17:05:08 -0700
commit24e44913aa746098349370a0f279733c0cadcba7 (patch)
tree51edd7b13d889653b0400d67dd3e7e91a11db75b /drivers/tty
parent31cc088a4f5d83481c6f5041bd6eb06115b974af (diff)
parent7e8a0f10899075ac2665c78c4e49dbaf32bf3346 (diff)
Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC platform updates from Olof Johansson: "SoC platform changes. Main theme this merge window: - The Netx platform (Netx 100/500) platform is removed by Linus Walleij-- the SoC doesn't have active maintainers with hardware, and in discussions with the vendor the agreement was that it's OK to remove. - Russell King has a series of patches that cleans up and refactors SA1101 and RiscPC support" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (47 commits) ARM: stm32: use "depends on" instead of "if" after prompt ARM: sa1100: convert to common clock framework ARM: exynos: Cleanup cppcheck shifting warning ARM: pxa/lubbock: remove lubbock_set_misc_wr() from global view ARM: exynos: Only build MCPM support if used arm: add missing include platform-data/atmel.h ARM: davinci: Use GPIO lookup table for DA850 LEDs ARM: OMAP2: drop explicit assembler architecture ARM: use arch_extension directive instead of arch argument ARM: imx: Switch imx7d to imx-cpufreq-dt for speed-grading ARM: bcm: Enable PINCTRL for ARCH_BRCMSTB ARM: bcm: Enable ARCH_HAS_RESET_CONTROLLER for ARCH_BRCMSTB ARM: riscpc: enable chained scatterlist support ARM: riscpc: reduce IRQ handling code ARM: riscpc: move RiscPC assembly files from arch/arm/lib to mach-rpc ARM: riscpc: parse video information from tagged list ARM: riscpc: add ecard quirk for Atomwide 3port serial card MAINTAINERS: mvebu: Add git entry soc: ti: pm33xx: Add a print while entering RTC only mode with DDR in self-refresh ARM: OMAP2+: Make some variables static ...
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/Kconfig1
-rw-r--r--drivers/tty/serial/sa1100.c46
2 files changed, 43 insertions, 4 deletions
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 04c23951b831..fd385c8c53a5 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -497,6 +497,7 @@ config SERIAL_SA1100
bool "SA1100 serial port support"
depends on ARCH_SA1100
select SERIAL_CORE
+ select SERIAL_MCTRL_GPIO if GPIOLIB
help
If you have a machine based on a SA1100/SA1110 StrongARM(R) CPU you
can enable its onboard serial port by enabling this option.
diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c
index a399772be3fc..8e618129e65c 100644
--- a/drivers/tty/serial/sa1100.c
+++ b/drivers/tty/serial/sa1100.c
@@ -28,6 +28,8 @@
#include <mach/hardware.h>
#include <mach/irqs.h>
+#include "serial_mctrl_gpio.h"
+
/* We've been assigned a range on the "Low-density serial ports" major */
#define SERIAL_SA1100_MAJOR 204
#define MINOR_START 5
@@ -77,6 +79,7 @@ struct sa1100_port {
struct uart_port port;
struct timer_list timer;
unsigned int old_status;
+ struct mctrl_gpios *gpios;
};
/*
@@ -174,6 +177,8 @@ static void sa1100_enable_ms(struct uart_port *port)
container_of(port, struct sa1100_port, port);
mod_timer(&sport->timer, jiffies);
+
+ mctrl_gpio_enable_ms(sport->gpios);
}
static void
@@ -322,11 +327,21 @@ static unsigned int sa1100_tx_empty(struct uart_port *port)
static unsigned int sa1100_get_mctrl(struct uart_port *port)
{
- return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+ struct sa1100_port *sport =
+ container_of(port, struct sa1100_port, port);
+ int ret = TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+
+ mctrl_gpio_get(sport->gpios, &ret);
+
+ return ret;
}
static void sa1100_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
+ struct sa1100_port *sport =
+ container_of(port, struct sa1100_port, port);
+
+ mctrl_gpio_set(sport->gpios, mctrl);
}
/*
@@ -842,6 +857,31 @@ static int sa1100_serial_resume(struct platform_device *dev)
return 0;
}
+static int sa1100_serial_add_one_port(struct sa1100_port *sport, struct platform_device *dev)
+{
+ sport->port.dev = &dev->dev;
+
+ // mctrl_gpio_init() requires that the GPIO driver supports interrupts,
+ // but we need to support GPIO drivers for hardware that has no such
+ // interrupts. Use mctrl_gpio_init_noauto() instead.
+ sport->gpios = mctrl_gpio_init_noauto(sport->port.dev, 0);
+ if (IS_ERR(sport->gpios)) {
+ int err = PTR_ERR(sport->gpios);
+
+ dev_err(sport->port.dev, "failed to get mctrl gpios: %d\n",
+ err);
+
+ if (err == -EPROBE_DEFER)
+ return err;
+
+ sport->gpios = NULL;
+ }
+
+ platform_set_drvdata(dev, sport);
+
+ return uart_add_one_port(&sa1100_reg, &sport->port);
+}
+
static int sa1100_serial_probe(struct platform_device *dev)
{
struct resource *res = dev->resource;
@@ -856,9 +896,7 @@ static int sa1100_serial_probe(struct platform_device *dev)
if (sa1100_ports[i].port.mapbase != res->start)
continue;
- sa1100_ports[i].port.dev = &dev->dev;
- uart_add_one_port(&sa1100_reg, &sa1100_ports[i].port);
- platform_set_drvdata(dev, &sa1100_ports[i]);
+ sa1100_serial_add_one_port(&sa1100_ports[i], dev);
break;
}
}