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Merge branch 'for-arm-soc' of git://git.armlinux.org.uk/~rmk/linux-arm into arm/soc

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* 'for-arm-soc' of git://git.armlinux.org.uk/~rmk/linux-arm: (21 commits)
  ARM: sa1100: convert to common clock framework
  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
  ARM: sa1100/neponset: convert serial to use gpiod APIs
  ARM: sa1100/hackkit: remove empty serial mctrl functions
  ARM: sa1100/badge4: remove commented out modem control initialisers
  ARM: sa1100/h3xxx: convert serial to gpiod APIs
  ARM: sa1100/assabet: convert serial to gpiod APIs
  serial: sa1100: add note about modem control signals
  serial: sa1100: add support for mctrl gpios
  ARM: riscpc: dma: use __iomem pointers for writing DMA
  ARM: riscpc: dma: improve address/length writing
  ARM: riscpc: dma: make state a local variable
  ARM: riscpc: dma: eliminate "cur_sg" scatterlist usage
  ARM: riscpc: fix DMA
  ARM: riscpc: fix ecard printing
  ARM: riscpc: fix lack of keyboard interrupts after irq conversion
  ...
Signed-off-by: Olof Johansson <[email protected]>
This commit is contained in:
Olof Johansson 2019-07-15 17:29:45 -07:00
commit 7cba7cacee
20 changed files with 366 additions and 550 deletions
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1
drivers/tty/serial/Kconfig
View file

@ -511,6 +511,7 @@ 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.

46
drivers/tty/serial/sa1100.c
View file

@ -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;
}
}