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Date: Tue, 2 Aug 2011 11:45:27 +0800
From: Sonic Zhang <sonic.adi@...il.com>
To: Alan Cox <alan@...ux.intel.com>
CC: <linux-serial@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<uclinux-dist-devel@...ckfin.uclinux.org>,
Sonic Zhang <sonic.zhang@...log.com>
Subject: [PATCH v2] serial:bfin_uart: Put TX IRQ in individual platform resource.
From: Sonic Zhang <sonic.zhang@...log.com>
Serial TX IRQ is not RX IRQ plus 1 in some blackfin chips.
Give individual platform resources to both TX and RX irqs.
Signed-off-by: Sonic Zhang <sonic.zhang@...log.com>
---
drivers/tty/serial/bfin_uart.c | 35 +++++++++++++++++++++--------------
1 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c
index e08bc04..881c6e7 100644
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -667,17 +667,17 @@ static int bfin_serial_startup(struct uart_port *port)
kgdboc_break_enabled = 0;
else {
# endif
- if (request_irq(uart->port.irq, bfin_serial_rx_int, IRQF_DISABLED,
+ if (request_irq(uart->rx_irq, bfin_serial_rx_int, IRQF_DISABLED,
"BFIN_UART_RX", uart)) {
printk(KERN_NOTICE "Unable to attach BlackFin UART RX interrupt\n");
return -EBUSY;
}
if (request_irq
- (uart->port.irq+1, bfin_serial_tx_int, IRQF_DISABLED,
+ (uart->tx_irq, bfin_serial_tx_int, IRQF_DISABLED,
"BFIN_UART_TX", uart)) {
printk(KERN_NOTICE "Unable to attach BlackFin UART TX interrupt\n");
- free_irq(uart->port.irq, uart);
+ free_irq(uart->rx_irq, uart);
return -EBUSY;
}
@@ -692,7 +692,7 @@ static int bfin_serial_startup(struct uart_port *port)
*/
unsigned uart_dma_ch_rx, uart_dma_ch_tx;
- switch (uart->port.irq) {
+ switch (uart->rx_irq) {
case IRQ_UART3_RX:
uart_dma_ch_rx = CH_UART3_RX;
uart_dma_ch_tx = CH_UART3_TX;
@@ -709,16 +709,16 @@ static int bfin_serial_startup(struct uart_port *port)
if (uart_dma_ch_rx &&
request_dma(uart_dma_ch_rx, "BFIN_UART_RX") < 0) {
printk(KERN_NOTICE"Fail to attach UART interrupt\n");
- free_irq(uart->port.irq, uart);
- free_irq(uart->port.irq + 1, uart);
+ free_irq(uart->rx_irq, uart);
+ free_irq(uart->tx_irq, uart);
return -EBUSY;
}
if (uart_dma_ch_tx &&
request_dma(uart_dma_ch_tx, "BFIN_UART_TX") < 0) {
printk(KERN_NOTICE "Fail to attach UART interrupt\n");
free_dma(uart_dma_ch_rx);
- free_irq(uart->port.irq, uart);
- free_irq(uart->port.irq + 1, uart);
+ free_irq(uart->rx_irq, uart);
+ free_irq(uart->tx_irq, uart);
return -EBUSY;
}
}
@@ -785,8 +785,8 @@ static void bfin_serial_shutdown(struct uart_port *port)
break;
};
#endif
- free_irq(uart->port.irq, uart);
- free_irq(uart->port.irq+1, uart);
+ free_irq(uart->rx_irq, uart);
+ free_irq(uart->tx_irq, uart);
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
@@ -1319,14 +1319,21 @@ static int bfin_serial_probe(struct platform_device *pdev)
}
uart->port.mapbase = res->start;
- uart->port.irq = platform_get_irq(pdev, 0);
- if (uart->port.irq < 0) {
- dev_err(&pdev->dev, "No uart RX/TX IRQ specified\n");
+ uart->tx_irq = platform_get_irq(pdev, 0);
+ if (uart->tx_irq < 0) {
+ dev_err(&pdev->dev, "No uart TX IRQ specified\n");
ret = -ENOENT;
goto out_error_unmap;
}
- uart->status_irq = platform_get_irq(pdev, 1);
+ uart->rx_irq = platform_get_irq(pdev, 1);
+ if (uart->rx_irq < 0) {
+ dev_err(&pdev->dev, "No uart RX IRQ specified\n");
+ ret = -ENOENT;
+ goto out_error_unmap;
+ }
+
+ uart->status_irq = platform_get_irq(pdev, 2);
if (uart->status_irq < 0) {
dev_err(&pdev->dev, "No uart status IRQ specified\n");
ret = -ENOENT;
--
1.7.0.4
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