From: Govindraj R <govindraj.raja@xxxxxx>
Adds context save/restore for mcr register as state of mcr register
is lost after core off.
Signed-off-by: Govindraj R <govindraj.raja@xxxxxx>
Signed-off-by: Nishanth Menon <nm@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm/mach-omap2/serial.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index 3771254..804dbb2 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -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);
--
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