diff options
Diffstat (limited to 'drivers/tty/serial/uartlite.c')
| -rw-r--r-- | drivers/tty/serial/uartlite.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c index c47db7826189..0f798f7837ad 100644 --- a/drivers/tty/serial/uartlite.c +++ b/drivers/tty/serial/uartlite.c @@ -54,6 +54,10 @@ #define ULITE_CONTROL_RST_RX 0x02 #define ULITE_CONTROL_IE 0x10 +struct uartlite_data { + const struct uartlite_reg_ops *reg_ops; +}; + struct uartlite_reg_ops { u32 (*in)(void __iomem *addr); void (*out)(u32 val, void __iomem *addr); @@ -91,16 +95,16 @@ static const struct uartlite_reg_ops uartlite_le = { static inline u32 uart_in32(u32 offset, struct uart_port *port) { - const struct uartlite_reg_ops *reg_ops = port->private_data; + struct uartlite_data *pdata = port->private_data; - return reg_ops->in(port->membase + offset); + return pdata->reg_ops->in(port->membase + offset); } static inline void uart_out32(u32 val, u32 offset, struct uart_port *port) { - const struct uartlite_reg_ops *reg_ops = port->private_data; + struct uartlite_data *pdata = port->private_data; - reg_ops->out(val, port->membase + offset); + pdata->reg_ops->out(val, port->membase + offset); } static struct uart_port ulite_ports[ULITE_NR_UARTS]; @@ -325,6 +329,7 @@ static void ulite_release_port(struct uart_port *port) static int ulite_request_port(struct uart_port *port) { + struct uartlite_data *pdata = port->private_data; int ret; pr_debug("ulite console: port=%p; port->mapbase=%llx\n", @@ -342,13 +347,13 @@ static int ulite_request_port(struct uart_port *port) return -EBUSY; } - port->private_data = (void *)&uartlite_be; + pdata->reg_ops = &uartlite_be; ret = uart_in32(ULITE_CONTROL, port); uart_out32(ULITE_CONTROL_RST_TX, ULITE_CONTROL, port); ret = uart_in32(ULITE_STATUS, port); /* Endianess detection */ if ((ret & ULITE_STATUS_TXEMPTY) != ULITE_STATUS_TXEMPTY) - port->private_data = (void *)&uartlite_le; + pdata->reg_ops = &uartlite_le; return 0; } @@ -585,10 +590,12 @@ static struct uart_driver ulite_uart_driver = { * @id: requested id number. Pass -1 for automatic port assignment * @base: base address of uartlite registers * @irq: irq number for uartlite + * @pdata: private data for uartlite * * Returns: 0 on success, <0 otherwise */ -static int ulite_assign(struct device *dev, int id, u32 base, int irq) +static int ulite_assign(struct device *dev, int id, u32 base, int irq, + struct uartlite_data *pdata) { struct uart_port *port; int rc; @@ -625,6 +632,7 @@ static int ulite_assign(struct device *dev, int id, u32 base, int irq) port->dev = dev; port->type = PORT_UNKNOWN; port->line = id; + port->private_data = pdata; dev_set_drvdata(dev, port); @@ -675,6 +683,7 @@ MODULE_DEVICE_TABLE(of, ulite_of_match); static int ulite_probe(struct platform_device *pdev) { struct resource *res; + struct uartlite_data *pdata; int irq; int id = pdev->id; #ifdef CONFIG_OF @@ -684,6 +693,10 @@ static int ulite_probe(struct platform_device *pdev) if (prop) id = be32_to_cpup(prop); #endif + pdata = devm_kzalloc(&pdev->dev, sizeof(struct uartlite_data), + GFP_KERNEL); + if (!pdata) + return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) @@ -693,7 +706,7 @@ static int ulite_probe(struct platform_device *pdev) if (irq <= 0) return -ENXIO; - return ulite_assign(&pdev->dev, id, res->start, irq); + return ulite_assign(&pdev->dev, id, res->start, irq, pdata); } static int ulite_remove(struct platform_device *pdev) |