tty/serial: at91: use mctrl_gpio helpers

On sam9x5, dedicated CTS (and RTS) pins are unusable together with the
LCDC, the EMAC, or the MMC because they share the same line.

Moreover, the USART controller doesn't handle DTR/DSR/DCD/RI signals,
so we have to control them via GPIO.

This patch permits to use GPIOs to control the CTS/RTS/DTR/DSR/DCD/RI
signals.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 5 deletions

diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index dab362c06487..4dfedd3f2e15 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -1588,7 +1588,6 @@ static struct resource dbgu_resources[] = {
 static struct atmel_uart_data dbgu_data = {
         .use_dma_tx     = 0,
         .use_dma_rx     = 0,
-        .rts_gpio       = -EINVAL,
 };
 
 static u64 dbgu_dmamask = DMA_BIT_MASK(32);
@@ -1627,7 +1626,6 @@ static struct resource uart0_resources[] = {
 static struct atmel_uart_data uart0_data = {
         .use_dma_tx     = 1,
         .use_dma_rx     = 1,
-        .rts_gpio       = -EINVAL,
 };
 
 static u64 uart0_dmamask = DMA_BIT_MASK(32);
@@ -1671,7 +1669,6 @@ static struct resource uart1_resources[] = {
 static struct atmel_uart_data uart1_data = {
         .use_dma_tx     = 1,
         .use_dma_rx     = 1,
-        .rts_gpio       = -EINVAL,
 };
 
 static u64 uart1_dmamask = DMA_BIT_MASK(32);
@@ -1715,7 +1712,6 @@ static struct resource uart2_resources[] = {
 static struct atmel_uart_data uart2_data = {
         .use_dma_tx     = 1,
         .use_dma_rx     = 1,
-        .rts_gpio       = -EINVAL,
 };
 
 static u64 uart2_dmamask = DMA_BIT_MASK(32);
@@ -1759,7 +1755,6 @@ static struct resource uart3_resources[] = {
 static struct atmel_uart_data uart3_data = {
         .use_dma_tx     = 1,
         .use_dma_rx     = 1,
-        .rts_gpio       = -EINVAL,
 };
 
 static u64 uart3_dmamask = DMA_BIT_MASK(32);