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OMAP3: serial - allow platforms specify which UARTs to initialize 

This patch adds new function: omap_serial_init_port(port) that can be
used to initialize only selected UARTs as serial ports. Platforms can
then in their board files call this function instead of omap_serial_init()
if they don't want to use all UARTs as serial ports.

Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Mika Westerberg 2009-12-11 16:16:35 -08:00 committed by Tony Lindgren
parent edc961a2fa
commit f62349ee97
2 changed files with 57 additions and 16 deletions
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72
arch/arm/mach-omap2/serial.c
View File

@ -631,24 +631,64 @@ void __init omap_serial_early_init(void)
}
}
/**
* omap_serial_init_port() - initialize single serial port
* @port: serial port number (0-3)
*
* This function initialies serial driver for given @port only.
* Platforms can call this function instead of omap_serial_init()
* if they don't plan to use all available UARTs as serial ports.
*
* Don't mix calls to omap_serial_init_port() and omap_serial_init(),
* use only one of the two.
*/
void __init omap_serial_init_port(int port)
{
struct omap_uart_state *uart;
struct platform_device *pdev;
struct device *dev;
BUG_ON(port < 0);
BUG_ON(port >= ARRAY_SIZE(omap_uart));
uart = &omap_uart[port];
pdev = &uart->pdev;
dev = &pdev->dev;
omap_uart_reset(uart);
omap_uart_idle_init(uart);
if (WARN_ON(platform_device_register(pdev)))
return;
if ((cpu_is_omap34xx() && uart->padconf) ||
(uart->wk_en && uart->wk_mask)) {
device_init_wakeup(dev, true);
DEV_CREATE_FILE(dev, &dev_attr_sleep_timeout);
}
/* omap44xx: Never read empty UART fifo
* omap3xxx: Never read empty UART fifo on UARTs
* with IP rev >=0x52
*/
if (cpu_is_omap44xx())
uart->p->serial_in = serial_in_override;
else if ((serial_read_reg(uart->p, UART_OMAP_MVER) & 0xFF)
>= UART_OMAP_NO_EMPTY_FIFO_READ_IP_REV)
uart->p->serial_in = serial_in_override;
}
/**
* omap_serial_init() - intialize all supported serial ports
*
* Initializes all available UARTs as serial ports. Platforms
* can call this function when they want to have default behaviour
* for serial ports (e.g initialize them all as serial ports).
*/
void __init omap_serial_init(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(omap_uart); i++) {
struct omap_uart_state *uart = &omap_uart[i];
struct platform_device *pdev = &uart->pdev;
struct device *dev = &pdev->dev;
omap_uart_reset(uart);
omap_uart_idle_init(uart);
if (WARN_ON(platform_device_register(pdev)))
continue;
if ((cpu_is_omap34xx() && uart->padconf) ||
(uart->wk_en && uart->wk_mask)) {
device_init_wakeup(dev, true);
DEV_CREATE_FILE(dev, &dev_attr_sleep_timeout);
}
}
for (i = 0; i < ARRAY_SIZE(omap_uart); i++)
omap_serial_init_port(i);
}

1
arch/arm/plat-omap/include/plat/serial.h
View File

@ -53,6 +53,7 @@
#ifndef __ASSEMBLER__
extern void __init omap_serial_early_init(void);
extern void omap_serial_init(void);
extern void omap_serial_init_port(int port);
extern int omap_uart_can_sleep(void);
extern void omap_uart_check_wakeup(void);
extern void omap_uart_prepare_suspend(void);