diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_ingenic.c | 47 |
1 files changed, 43 insertions, 4 deletions
diff --git a/drivers/tty/serial/8250/8250_ingenic.c b/drivers/tty/serial/8250/8250_ingenic.c index 6cc05f88e09f..49394b4c5cfd 100644 --- a/drivers/tty/serial/8250/8250_ingenic.c +++ b/drivers/tty/serial/8250/8250_ingenic.c @@ -21,17 +21,28 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_fdt.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/serial_8250.h> #include <linux/serial_core.h> #include <linux/serial_reg.h> +#include "8250.h" + +/** ingenic_uart_config: SOC specific config data. */ +struct ingenic_uart_config { + int tx_loadsz; + int fifosize; +}; + struct ingenic_uart_data { struct clk *clk_module; struct clk *clk_baud; int line; }; +static const struct of_device_id of_match[]; + #define UART_FCR_UME BIT(4) #define UART_MCR_MDCE BIT(7) @@ -192,8 +203,17 @@ static int ingenic_uart_probe(struct platform_device *pdev) struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); struct ingenic_uart_data *data; + const struct ingenic_uart_config *cdata; + const struct of_device_id *match; int err, line; + match = of_match_device(of_match, &pdev->dev); + if (!match) { + dev_err(&pdev->dev, "Error: No device match found\n"); + return -ENODEV; + } + cdata = match->data; + if (!regs || !irq) { dev_err(&pdev->dev, "no registers/irq defined\n"); return -EINVAL; @@ -204,7 +224,7 @@ static int ingenic_uart_probe(struct platform_device *pdev) return -ENOMEM; spin_lock_init(&uart.port.lock); - uart.port.type = PORT_16550; + uart.port.type = PORT_16550A; uart.port.flags = UPF_SKIP_TEST | UPF_IOREMAP | UPF_FIXED_TYPE; uart.port.iotype = UPIO_MEM; uart.port.mapbase = regs->start; @@ -213,6 +233,9 @@ static int ingenic_uart_probe(struct platform_device *pdev) uart.port.serial_in = ingenic_uart_serial_in; uart.port.irq = irq->start; uart.port.dev = &pdev->dev; + uart.port.fifosize = cdata->fifosize; + uart.tx_loadsz = cdata->tx_loadsz; + uart.capabilities = UART_CAP_FIFO | UART_CAP_RTOIE; /* Check for a fixed line number */ line = of_alias_get_id(pdev->dev.of_node, "serial"); @@ -282,10 +305,26 @@ static int ingenic_uart_remove(struct platform_device *pdev) return 0; } +static const struct ingenic_uart_config jz4740_uart_config = { + .tx_loadsz = 8, + .fifosize = 16, +}; + +static const struct ingenic_uart_config jz4760_uart_config = { + .tx_loadsz = 16, + .fifosize = 32, +}; + +static const struct ingenic_uart_config jz4780_uart_config = { + .tx_loadsz = 32, + .fifosize = 64, +}; + static const struct of_device_id of_match[] = { - { .compatible = "ingenic,jz4740-uart" }, - { .compatible = "ingenic,jz4775-uart" }, - { .compatible = "ingenic,jz4780-uart" }, + { .compatible = "ingenic,jz4740-uart", .data = &jz4740_uart_config }, + { .compatible = "ingenic,jz4760-uart", .data = &jz4760_uart_config }, + { .compatible = "ingenic,jz4775-uart", .data = &jz4760_uart_config }, + { .compatible = "ingenic,jz4780-uart", .data = &jz4780_uart_config }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, of_match); |
