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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: Govindraj R <govindraj.raja@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Govindraj R 2010-08-02 13:18:11 +03:00 committed by Tony Lindgren
parent b075f58b2c
commit 5ade4ff593
1 changed files with 6 additions and 0 deletions
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6
arch/arm/mach-omap2/serial.c
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@ -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);