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| author | Andreas Werner <andy@wernerandy.de> | 2015-10-05 19:23:14 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-17 21:05:43 -0700 |
| commit | 37f0679964fa8a1c345accb4a36da09c07d3b6a3 (patch) | |
| tree | 124576006a7ea93ac953e490feb7c0b7a8348c68 /drivers/tty/serial/men_z135_uart.c | |
| parent | 270c2adef30e1912002ba014c16c08b86706d01f (diff) | |
| download | linux-37f0679964fa8a1c345accb4a36da09c07d3b6a3.tar.gz linux-37f0679964fa8a1c345accb4a36da09c07d3b6a3.tar.bz2 linux-37f0679964fa8a1c345accb4a36da09c07d3b6a3.zip | |
tty: serial: men_z135_uart.c: use mcb memory region size instead of hardcoded one
There is no need to hardcode the MEN_Z135_MEM_SIZE. The MCB subsystem
already knowns the size which is located in the chameleon table.
MCB parse the chameleon table to get the resources of each IP and provide
the mcb_request_mem function to get those resources.
Use mcb_request_mem to get the resources. This function also takes care of
the memory region naming allocated by the driver for each of the instances.
Signed-off-by: Andreas Werner <andy@wernerandy.de>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/men_z135_uart.c')
| -rw-r--r-- | drivers/tty/serial/men_z135_uart.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/tty/serial/men_z135_uart.c b/drivers/tty/serial/men_z135_uart.c index b90e7b30468b..3141aa20843d 100644 --- a/drivers/tty/serial/men_z135_uart.c +++ b/drivers/tty/serial/men_z135_uart.c @@ -35,8 +35,6 @@ #define MEN_Z135_BAUD_REG 0x810 #define MEN_Z135_TIMEOUT 0x814 -#define MEN_Z135_MEM_SIZE 0x818 - #define IRQ_ID(x) ((x) & 0x1f) #define MEN_Z135_IER_RXCIEN BIT(0) /* RX Space IRQ */ @@ -124,6 +122,7 @@ MODULE_PARM_DESC(rx_timeout, "RX timeout. " struct men_z135_port { struct uart_port port; struct mcb_device *mdev; + struct resource *mem; unsigned char *rxbuf; u32 stat_reg; spinlock_t lock; @@ -734,22 +733,30 @@ static const char *men_z135_type(struct uart_port *port) static void men_z135_release_port(struct uart_port *port) { + struct men_z135_port *uart = to_men_z135(port); + iounmap(port->membase); port->membase = NULL; - release_mem_region(port->mapbase, MEN_Z135_MEM_SIZE); + mcb_release_mem(uart->mem); } static int men_z135_request_port(struct uart_port *port) { - int size = MEN_Z135_MEM_SIZE; + struct men_z135_port *uart = to_men_z135(port); + struct mcb_device *mdev = uart->mdev; + struct resource *mem; + + mem = mcb_request_mem(uart->mdev, dev_name(&mdev->dev)); + if (IS_ERR(mem)) + return PTR_ERR(mem); - if (!request_mem_region(port->mapbase, size, "men_z135_port")) - return -EBUSY; + port->mapbase = mem->start; + uart->mem = mem; - port->membase = ioremap(port->mapbase, MEN_Z135_MEM_SIZE); + port->membase = ioremap(mem->start, resource_size(mem)); if (port->membase == NULL) { - release_mem_region(port->mapbase, MEN_Z135_MEM_SIZE); + mcb_release_mem(mem); return -ENOMEM; } |