From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Thu, 08 Jul 2010 13:08:12 +0300 Subject: [PATCH 1/5] omap3: serial: Add context save and restore for mcr In-Reply-To: <20100708100715.19285.30066.stgit@baageli.muru.com> References: <20100708100715.19285.30066.stgit@baageli.muru.com> Message-ID: <20100708100812.19285.48402.stgit@baageli.muru.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Govindraj R Adds context save/restore for mcr register as state of mcr register is lost after core off. Signed-off-by: Govindraj R Signed-off-by: Nishanth Menon Signed-off-by: Tony Lindgren --- 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);