diff options
Diffstat (limited to 'drivers/tty/serial/sh-sci.c')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index e7d6566fafaf..95772cf4e7b0 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -84,7 +84,7 @@ struct sci_port { int overrun_bit; unsigned int error_mask; unsigned int sampling_rate; - + resource_size_t reg_size; /* Break timer */ struct timer_list break_timer; @@ -2073,23 +2073,9 @@ static const char *sci_type(struct uart_port *port) return NULL; } -static inline unsigned long sci_port_size(struct uart_port *port) -{ - /* - * Pick an arbitrary size that encapsulates all of the base - * registers by default. This can be optimized later, or derived - * from platform resource data at such a time that ports begin to - * behave more erratically. - */ - if (port->type == PORT_HSCIF) - return 96; - else - return 64; -} - static int sci_remap_port(struct uart_port *port) { - unsigned long size = sci_port_size(port); + struct sci_port *sport = to_sci_port(port); /* * Nothing to do if there's already an established membase. @@ -2098,7 +2084,7 @@ static int sci_remap_port(struct uart_port *port) return 0; if (port->flags & UPF_IOREMAP) { - port->membase = ioremap_nocache(port->mapbase, size); + port->membase = ioremap_nocache(port->mapbase, sport->reg_size); if (unlikely(!port->membase)) { dev_err(port->dev, "can't remap port#%d\n", port->line); return -ENXIO; @@ -2117,23 +2103,28 @@ static int sci_remap_port(struct uart_port *port) static void sci_release_port(struct uart_port *port) { + struct sci_port *sport = to_sci_port(port); + if (port->flags & UPF_IOREMAP) { iounmap(port->membase); port->membase = NULL; } - release_mem_region(port->mapbase, sci_port_size(port)); + release_mem_region(port->mapbase, sport->reg_size); } static int sci_request_port(struct uart_port *port) { - unsigned long size = sci_port_size(port); struct resource *res; + struct sci_port *sport = to_sci_port(port); int ret; - res = request_mem_region(port->mapbase, size, dev_name(port->dev)); - if (unlikely(res == NULL)) + res = request_mem_region(port->mapbase, sport->reg_size, + dev_name(port->dev)); + if (unlikely(res == NULL)) { + dev_err(port->dev, "request_mem_region failed."); return -EBUSY; + } ret = sci_remap_port(port); if (unlikely(ret != 0)) { @@ -2207,6 +2198,7 @@ static int sci_init_single(struct platform_device *dev, return -ENOMEM; port->mapbase = res->start; + sci_port->reg_size = resource_size(res); for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i) sci_port->irqs[i] = platform_get_irq(dev, i); @@ -2536,6 +2528,12 @@ static const struct of_device_id of_sci_match[] = { .regtype = SCIx_HSCIF_REGTYPE, }, }, { + .compatible = "renesas,sci", + .data = &(const struct sci_port_info) { + .type = PORT_SCI, + .regtype = SCIx_SCI_REGTYPE, + }, + }, { /* Terminator */ }, }; |