linux-kernel - [PATCH 1/2] serial/8250: Add LPC3220 standard UART type

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Message-Id: <1338282570-19799-1-git-send-email-stigge@antcom.de>
Date:	Tue, 29 May 2012 11:09:29 +0200
From:	Roland Stigge <stigge@...com.de>
To:	alan@...ux.intel.com, gregkh@...uxfoundation.org,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	kevin.wells@....com, srinivas.bakki@....com,
	linux-arm-kernel@...ts.infradead.org, arnd@...db.de,
	linux@....linux.org.uk
Cc:	Roland Stigge <stigge@...com.de>
Subject: [PATCH 1/2] serial/8250: Add LPC3220 standard UART type

LPC32xx has "Standard" UARTs that are actually 16550A compatible but have
bigger FIFOs. Since the already supported 16X50 line still doesn't match here,
we agreed on adding a new type.

Signed-off-by: Roland Stigge <stigge@...com.de>

---
Applies to v3.4

 drivers/tty/serial/8250/8250.c |    8 ++++++++
 include/linux/serial_core.h    |    3 ++-
 2 files changed, 10 insertions(+), 1 deletion(-)

--- linux-2.6.orig/drivers/tty/serial/8250/8250.c
+++ linux-2.6/drivers/tty/serial/8250/8250.c
@@ -282,6 +282,14 @@ static const struct serial8250_config ua
 		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
 		.flags		= UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR,
 	},
+	[PORT_LPC3220] = {
+		.name		= "LPC3220",
+		.fifo_size	= 64,
+		.tx_loadsz	= 32,
+		.fcr		= UART_FCR_DMA_SELECT | UART_FCR_ENABLE_FIFO |
+				  UART_FCR_R_TRIG_00 | UART_FCR_T_TRIG_00,
+		.flags		= UART_CAP_FIFO,
+	},
 };
 
 #if defined(CONFIG_MIPS_ALCHEMY)
--- linux-2.6.orig/include/linux/serial_core.h
+++ linux-2.6/include/linux/serial_core.h
@@ -47,7 +47,8 @@
 #define PORT_U6_16550A	19	/* ST-Ericsson U6xxx internal UART */
 #define PORT_TEGRA	20	/* NVIDIA Tegra internal UART */
 #define PORT_XR17D15X	21	/* Exar XR17D15x UART */
-#define PORT_MAX_8250	21	/* max port ID */
+#define PORT_LPC3220	22	/* NXP LPC32xx SoC "Standard" UART */
+#define PORT_MAX_8250	22	/* max port ID */
 
 /*
  * ARM specific type numbers.  These are not currently guaranteed
--
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