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Commit 7fe9a5a9 authored by Russell King's avatar Russell King Committed by Greg Kroah-Hartman
Browse files

tty: amba-pl011: add helper to detect split LCRH register 



Add a helper to detect the split LCRH register found on ST variants.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b2a4e24c

drivers/tty/serial/amba-pl011.c

+7 −2
Original line number Diff line number Diff line
@@ -1576,10 +1576,15 @@ static int pl011_hwinit(struct uart_port *port) 
	return 0;

}



static bool pl011_split_lcrh(const struct uart_amba_port *uap)

{

	return uap->lcrh_rx != uap->lcrh_tx;

}



static void pl011_write_lcr_h(struct uart_amba_port *uap, unsigned int lcr_h)

{

	pl011_write(lcr_h, uap, uap->lcrh_rx);

	if (uap->lcrh_rx != uap->lcrh_tx) {

	if (pl011_split_lcrh(uap)) {

		int i;

		/*

		 * Wait 10 PCLKs before writing LCRH_TX register,
@@ -1713,7 +1718,7 @@ static void pl011_disable_uart(struct uart_amba_port *uap) 
	 * disable break condition and fifos

	 */

	pl011_shutdown_channel(uap, uap->lcrh_rx);

	if (uap->lcrh_rx != uap->lcrh_tx)

	if (pl011_split_lcrh(uap))

		pl011_shutdown_channel(uap, uap->lcrh_tx);

}