From: Mika Westerberg <[email protected]> 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 <[email protected]> Signed-off-by: Kevin Hilman <[email protected]> --- I refreshed this against latest l-o master and added Kevins SoB. Tested with RX-51. arch/arm/mach-omap2/serial.c | 78 ++++++++++++++++++++--------- arch/arm/plat-omap/include/plat/serial.h | 1 + 2 files changed, 55 insertions(+), 24 deletions(-) diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index e853115..eb2ba6e 100644 --- a/arch/arm/mach-omap2/serial.c +++ b/arch/arm/mach-omap2/serial.c @@ -649,34 +649,64 @@ void __init omap_serial_early_init(void) } } -void __init omap_serial_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) { - int i; + struct omap_uart_state *uart; + struct platform_device *pdev; + struct device *dev; - 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; + BUG_ON(port < 0); + BUG_ON(port >= ARRAY_SIZE(omap_uart)); - omap_uart_reset(uart); - omap_uart_idle_init(uart); + uart = &omap_uart[port]; + pdev = &uart->pdev; + dev = &pdev->dev; - 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); - } + omap_uart_reset(uart); + omap_uart_idle_init(uart); - /* 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; + 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++) + omap_serial_init_port(i); } diff --git a/arch/arm/plat-omap/include/plat/serial.h b/arch/arm/plat-omap/include/plat/serial.h index 9951345..f5a4a92 100644 --- a/arch/arm/plat-omap/include/plat/serial.h +++ b/arch/arm/plat-omap/include/plat/serial.h @@ -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); -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
