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Commit 5ade4ff5 authored by Govindraj R's avatar Govindraj R Committed by Tony Lindgren
Browse files

omap3: serial: Add context save and restore for mcr 



Adds context save/restore for mcr register as state of mcr register
is lost after core off.

Signed-off-by: default avatarGovindraj R <govindraj.raja@ti.com>
Signed-off-by: default avatarNishanth Menon <nm@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent b075f58b

arch/arm/mach-omap2/serial.c

+6 −0
Original line number Diff line number Diff line
@@ -74,6 +74,7 @@ struct omap_uart_state { 
	u16 sysc;

	u16 scr;

	u16 wer;

	u16 mcr;

#endif

};
@@ -197,6 +198,9 @@ static void omap_uart_save_context(struct omap_uart_state *uart) 
	uart->sysc = serial_read_reg(p, UART_OMAP_SYSC);

	uart->scr = serial_read_reg(p, UART_OMAP_SCR);

	uart->wer = serial_read_reg(p, UART_OMAP_WER);

	serial_write_reg(p, UART_LCR, 0x80);

	uart->mcr = serial_read_reg(p, UART_MCR);

	serial_write_reg(p, UART_LCR, lcr);



	uart->context_valid = 1;

}
@@ -225,6 +229,8 @@ static void omap_uart_restore_context(struct omap_uart_state *uart) 
	serial_write_reg(p, UART_DLM, uart->dlh);

	serial_write_reg(p, UART_LCR, 0x0); /* Operational mode */

	serial_write_reg(p, UART_IER, uart->ier);

	serial_write_reg(p, UART_LCR, 0x80);

	serial_write_reg(p, UART_MCR, uart->mcr);

	serial_write_reg(p, UART_FCR, 0xA1);

	serial_write_reg(p, UART_LCR, 0xBF); /* Config B mode */

	serial_write_reg(p, UART_EFR, efr);