diff options
Diffstat (limited to 'drivers/tty/serial/8250')
| -rw-r--r-- | drivers/tty/serial/8250/8250_bcm7271.c | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_exar.c | 36 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_ingenic.c | 6 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_lpss.c | 10 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_omap.c | 27 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_pci.c | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_pnp.c | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 3 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/Kconfig | 10 |
9 files changed, 72 insertions, 26 deletions
diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c index 725a450058f8..7f656fac503f 100644 --- a/drivers/tty/serial/8250/8250_bcm7271.c +++ b/drivers/tty/serial/8250/8250_bcm7271.c @@ -941,7 +941,7 @@ static int brcmuart_probe(struct platform_device *pdev) struct clk *baud_mux_clk; struct uart_8250_port up; struct resource *irq; - void __iomem *membase = 0; + void __iomem *membase = NULL; resource_size_t mapbase = 0; u32 clk_rate = 0; int ret; diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c index 3ffeedc29c83..d502240bbcf2 100644 --- a/drivers/tty/serial/8250/8250_exar.c +++ b/drivers/tty/serial/8250/8250_exar.c @@ -114,6 +114,7 @@ struct exar8250; struct exar8250_platform { int (*rs485_config)(struct uart_port *, struct serial_rs485 *); int (*register_gpio)(struct pci_dev *, struct uart_8250_port *); + void (*unregister_gpio)(struct uart_8250_port *); }; /** @@ -352,9 +353,8 @@ static void setup_gpio(struct pci_dev *pcidev, u8 __iomem *p) writeb(0x00, p + UART_EXAR_MPIOOD_15_8); } -static void * -__xr17v35x_register_gpio(struct pci_dev *pcidev, - const struct software_node *node) +static struct platform_device *__xr17v35x_register_gpio(struct pci_dev *pcidev, + const struct software_node *node) { struct platform_device *pdev; @@ -374,6 +374,12 @@ __xr17v35x_register_gpio(struct pci_dev *pcidev, return pdev; } +static void __xr17v35x_unregister_gpio(struct platform_device *pdev) +{ + device_remove_software_node(&pdev->dev); + platform_device_unregister(pdev); +} + static const struct property_entry exar_gpio_properties[] = { PROPERTY_ENTRY_U32("exar,first-pin", 0), PROPERTY_ENTRY_U32("ngpios", 16), @@ -384,8 +390,7 @@ static const struct software_node exar_gpio_node = { .properties = exar_gpio_properties, }; -static int xr17v35x_register_gpio(struct pci_dev *pcidev, - struct uart_8250_port *port) +static int xr17v35x_register_gpio(struct pci_dev *pcidev, struct uart_8250_port *port) { if (pcidev->vendor == PCI_VENDOR_ID_EXAR) port->port.private_data = @@ -394,6 +399,15 @@ static int xr17v35x_register_gpio(struct pci_dev *pcidev, return 0; } +static void xr17v35x_unregister_gpio(struct uart_8250_port *port) +{ + if (!port->port.private_data) + return; + + __xr17v35x_unregister_gpio(port->port.private_data); + port->port.private_data = NULL; +} + static int generic_rs485_config(struct uart_port *port, struct serial_rs485 *rs485) { @@ -419,6 +433,7 @@ static int generic_rs485_config(struct uart_port *port, static const struct exar8250_platform exar8250_default_platform = { .register_gpio = xr17v35x_register_gpio, + .unregister_gpio = xr17v35x_unregister_gpio, .rs485_config = generic_rs485_config, }; @@ -484,6 +499,7 @@ static int iot2040_register_gpio(struct pci_dev *pcidev, static const struct exar8250_platform iot2040_platform = { .rs485_config = iot2040_rs485_config, .register_gpio = iot2040_register_gpio, + .unregister_gpio = xr17v35x_unregister_gpio, }; /* @@ -555,17 +571,11 @@ pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev, static void pci_xr17v35x_exit(struct pci_dev *pcidev) { + const struct exar8250_platform *platform = exar_get_platform(); struct exar8250 *priv = pci_get_drvdata(pcidev); struct uart_8250_port *port = serial8250_get_port(priv->line[0]); - struct platform_device *pdev; - pdev = port->port.private_data; - if (!pdev) - return; - - device_remove_software_node(&pdev->dev); - platform_device_unregister(pdev); - port->port.private_data = NULL; + platform->unregister_gpio(port); } static inline void exar_misc_clear(struct exar8250 *priv) diff --git a/drivers/tty/serial/8250/8250_ingenic.c b/drivers/tty/serial/8250/8250_ingenic.c index 988bf6bcce42..65402d05eff9 100644 --- a/drivers/tty/serial/8250/8250_ingenic.c +++ b/drivers/tty/serial/8250/8250_ingenic.c @@ -209,16 +209,14 @@ static int ingenic_uart_probe(struct platform_device *pdev) struct uart_8250_port uart = {}; struct ingenic_uart_data *data; const struct ingenic_uart_config *cdata; - const struct of_device_id *match; struct resource *regs; int irq, err, line; - match = of_match_device(of_match, &pdev->dev); - if (!match) { + cdata = of_device_get_match_data(&pdev->dev); + if (!cdata) { dev_err(&pdev->dev, "Error: No device match found\n"); return -ENODEV; } - cdata = match->data; irq = platform_get_irq(pdev, 0); if (irq < 0) diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index 4dee8a9e0c95..848d81e3838c 100644 --- a/drivers/tty/serial/8250/8250_lpss.c +++ b/drivers/tty/serial/8250/8250_lpss.c @@ -158,6 +158,16 @@ static int byt_serial_setup(struct lpss8250 *lpss, struct uart_port *port) static int ehl_serial_setup(struct lpss8250 *lpss, struct uart_port *port) { + struct uart_8250_dma *dma = &lpss->data.dma; + struct uart_8250_port *up = up_to_u8250p(port); + + /* + * This simply makes the checks in the 8250_port to try the DMA + * channel request which in turn uses the magic of ACPI tables + * parsing (see drivers/dma/acpi-dma.c for the details) and + * matching with the registered General Purpose DMA controllers. + */ + up->dma = dma; return 0; } diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 79418d4beb48..891fd8345e25 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -538,7 +538,7 @@ static void omap_8250_pm(struct uart_port *port, unsigned int state, static void omap_serial_fill_features_erratas(struct uart_8250_port *up, struct omap8250_priv *priv) { - const struct soc_device_attribute k3_soc_devices[] = { + static const struct soc_device_attribute k3_soc_devices[] = { { .family = "AM65X", }, { .family = "J721E", .revision = "SR1.0" }, { /* sentinel */ } @@ -617,7 +617,7 @@ static irqreturn_t omap8250_irq(int irq, void *dev_id) struct uart_port *port = dev_id; struct omap8250_priv *priv = port->private_data; struct uart_8250_port *up = up_to_u8250p(port); - unsigned int iir; + unsigned int iir, lsr; int ret; #ifdef CONFIG_SERIAL_8250_DMA @@ -628,6 +628,7 @@ static irqreturn_t omap8250_irq(int irq, void *dev_id) #endif serial8250_rpm_get(up); + lsr = serial_port_in(port, UART_LSR); iir = serial_port_in(port, UART_IIR); ret = serial8250_handle_irq(port, iir); @@ -642,6 +643,24 @@ static irqreturn_t omap8250_irq(int irq, void *dev_id) serial_port_in(port, UART_RX); } + /* Stop processing interrupts on input overrun */ + if ((lsr & UART_LSR_OE) && up->overrun_backoff_time_ms > 0) { + unsigned long delay; + + up->ier = port->serial_in(port, UART_IER); + if (up->ier & (UART_IER_RLSI | UART_IER_RDI)) { + port->ops->stop_rx(port); + } else { + /* Keep restarting the timer until + * the input overrun subsides. + */ + cancel_delayed_work(&up->overrun_backoff); + } + + delay = msecs_to_jiffies(up->overrun_backoff_time_ms); + schedule_delayed_work(&up->overrun_backoff, delay); + } + serial8250_rpm_put(up); return IRQ_RETVAL(ret); @@ -1353,6 +1372,10 @@ static int omap8250_probe(struct platform_device *pdev) } } + if (of_property_read_u32(np, "overrun-throttle-ms", + &up.overrun_backoff_time_ms) != 0) + up.overrun_backoff_time_ms = 0; + priv->wakeirq = irq_of_parse_and_map(np, 1); pdata = of_device_get_match_data(&pdev->dev); diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index a808c283883e..726912b16a55 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -87,7 +87,7 @@ static void moan_device(const char *str, struct pci_dev *dev) static int setup_port(struct serial_private *priv, struct uart_8250_port *port, - int bar, int offset, int regshift) + u8 bar, unsigned int offset, int regshift) { struct pci_dev *dev = priv->dev; diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c index de90d681b64c..98e5ee4d0d08 100644 --- a/drivers/tty/serial/8250/8250_pnp.c +++ b/drivers/tty/serial/8250/8250_pnp.c @@ -13,6 +13,7 @@ #include <linux/pnp.h> #include <linux/string.h> #include <linux/kernel.h> +#include <linux/property.h> #include <linux/serial_core.h> #include <linux/bitops.h> @@ -475,6 +476,7 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) if (pnp_irq_flags(dev, 0) & IORESOURCE_IRQ_SHAREABLE) uart.port.flags |= UPF_SHARE_IRQ; uart.port.uartclk = 1843200; + device_property_read_u32(&dev->dev, "clock-frequency", &uart.port.uartclk); uart.port.dev = &dev->dev; line = serial8250_register_8250_port(&uart); diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 1da29a219842..66374704747e 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -122,7 +122,8 @@ static const struct serial8250_config uart_config[] = { .name = "16C950/954", .fifo_size = 128, .tx_loadsz = 128, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, + .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01, + .rxtrig_bytes = {16, 32, 112, 120}, /* UART_CAP_EFR breaks billionon CF bluetooth card. */ .flags = UART_CAP_FIFO | UART_CAP_SLEEP, }, diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index d1b3c2373fa4..71ae16de0f90 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -363,7 +363,7 @@ config SERIAL_8250_BCM2835AUX config SERIAL_8250_FSL bool depends on SERIAL_8250_CONSOLE - default PPC || ARM || ARM64 + default PPC || ARM || ARM64 || COMPILE_TEST config SERIAL_8250_DW tristate "Support for Synopsys DesignWare 8250 quirks" @@ -375,7 +375,8 @@ config SERIAL_8250_DW config SERIAL_8250_EM tristate "Support for Emma Mobile integrated serial port" - depends on SERIAL_8250 && ARM && HAVE_CLK + depends on SERIAL_8250 && HAVE_CLK + depends on ARM || COMPILE_TEST help Selecting this option will add support for the integrated serial port hardware found on the Emma Mobile line of processors. @@ -383,7 +384,8 @@ config SERIAL_8250_EM config SERIAL_8250_IOC3 tristate "SGI IOC3 8250 UART support" - depends on SGI_MFD_IOC3 && SERIAL_8250 + depends on SERIAL_8250 + depends on SGI_MFD_IOC3 || COMPILE_TEST select SERIAL_8250_EXTENDED select SERIAL_8250_SHARE_IRQ help @@ -495,7 +497,7 @@ config SERIAL_8250_MID config SERIAL_8250_PXA tristate "PXA serial port support" depends on SERIAL_8250 - depends on ARCH_PXA || ARCH_MMP + depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST help If you have a machine based on an Intel XScale PXA2xx CPU you can enable its onboard serial ports by enabling this option. The option is |