From 37f0679964fa8a1c345accb4a36da09c07d3b6a3 Mon Sep 17 00:00:00 2001
From: Andreas Werner <andy@wernerandy.de>
Date: Mon, 5 Oct 2015 19:23:14 +0200
Subject: [PATCH] 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>
---
drivers/tty/serial/men_z135_uart.c | 23 +++++++++++++++--------
1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/drivers/tty/serial/men_z135_uart.c b/drivers/tty/serial/men_z135_uart.c
index b90e7b30468b3..3141aa20843d7 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;
}
--
GitLab