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serial: meson: make use of uart_port member mapsize

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Member mapsize of struct uart_port is meant to store the resource size.
By using it we can get rid of meson_uart_res_size().

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heiner Kallweit 2017-04-19 22:17:47 +02:00 committed by Greg Kroah-Hartman
parent 5a2ce87bf2
commit ff3b9cad7d
1 changed files with 5 additions and 24 deletions
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29
drivers/tty/serial/meson_uart.c
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@ -402,26 +402,11 @@ static int meson_uart_verify_port(struct uart_port *port,
return ret;
}
static int meson_uart_res_size(struct uart_port *port)
{
struct platform_device *pdev = to_platform_device(port->dev);
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(port->dev, "cannot obtain I/O memory region");
return -ENODEV;
}
return resource_size(res);
}
static void meson_uart_release_port(struct uart_port *port)
{
int size = meson_uart_res_size(port);
if (port->flags & UPF_IOREMAP) {
devm_release_mem_region(port->dev, port->mapbase, size);
devm_release_mem_region(port->dev, port->mapbase,
port->mapsize);
devm_iounmap(port->dev, port->membase);
port->membase = NULL;
}
@ -429,12 +414,7 @@ static void meson_uart_release_port(struct uart_port *port)
static int meson_uart_request_port(struct uart_port *port)
{
int size = meson_uart_res_size(port);
if (size < 0)
return size;
if (!devm_request_mem_region(port->dev, port->mapbase, size,
if (!devm_request_mem_region(port->dev, port->mapbase, port->mapsize,
dev_name(port->dev))) {
dev_err(port->dev, "Memory region busy\n");
return -EBUSY;
@ -443,7 +423,7 @@ static int meson_uart_request_port(struct uart_port *port)
if (port->flags & UPF_IOREMAP) {
port->membase = devm_ioremap_nocache(port->dev,
port->mapbase,
size);
port->mapsize);
if (port->membase == NULL)
return -ENOMEM;
}
@ -641,6 +621,7 @@ static int meson_uart_probe(struct platform_device *pdev)
port->uartclk = clk_get_rate(clk);
port->iotype = UPIO_MEM;
port->mapbase = res_mem->start;
port->mapsize = resource_size(res_mem);
port->irq = res_irq->start;
port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_LOW_LATENCY;
port->dev = &pdev->dev;