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tty: serial core: decouple pm states from ACPI

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The serial core is using power states lifted from ACPI for no
good reason. Remove this reference from the documentation and
alter all users to use an enum specific to the serial core
instead, and define it in <linux/serial_core.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Walleij
2012-12-07 11:36:08 +01:00
committed by Greg Kroah-Hartman
parent fdbc7353e4
commit 6f538fe31c
3 changed files with 31 additions and 18 deletions
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include/linux/serial_core.h
+13 -1
View File
@@ -208,13 +208,25 @@ static inline void serial_port_out(struct uart_port *up, int offset, int value)
up->serial_out(up, offset, value);
}
/**
* enum uart_pm_state - power states for UARTs
* @UART_PM_STATE_ON: UART is powered, up and operational
* @UART_PM_STATE_OFF: UART is powered off
* @UART_PM_STATE_UNDEFINED: sentinel
*/
enum uart_pm_state {
UART_PM_STATE_ON = 0,
UART_PM_STATE_OFF = 3, /* number taken from ACPI */
UART_PM_STATE_UNDEFINED,
};
/*
* This is the state information which is persistent across opens.
*/
struct uart_state {
struct tty_port port;
int pm_state;
enum uart_pm_state pm_state;
struct circ_buf xmit;
struct uart_port *uart_port;