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Date: Sat, 25 Jun 2011 02:04:33 +0800
From: Shawn Guo <shawn.guo@...aro.org>
To: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
linux-serial@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
patches@...aro.org, Shawn Guo <shawn.guo@...aro.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: [PATCH v2 2/5] serial/imx: get rid of the use of cpu_is_mx1()
The patch removes all the uses of cpu_is_mx1(). Instead, it uses
the .id_table of platform_driver to distinguish the uart device type.
Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
Cc: Sascha Hauer <s.hauer@...gutronix.de>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
---
arch/arm/mach-imx/clock-imx1.c | 6 +-
arch/arm/plat-mxc/devices/platform-imx-uart.c | 2 +-
drivers/tty/serial/imx.c | 52 ++++++++++++++++++++++--
3 files changed, 51 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-imx/clock-imx1.c b/arch/arm/mach-imx/clock-imx1.c
index dcc4172..4aabeb2 100644
--- a/arch/arm/mach-imx/clock-imx1.c
+++ b/arch/arm/mach-imx/clock-imx1.c
@@ -587,9 +587,9 @@ static struct clk_lookup lookups[] __initdata = {
_REGISTER_CLOCK(NULL, "mma", mma_clk)
_REGISTER_CLOCK("imx_udc.0", NULL, usbd_clk)
_REGISTER_CLOCK(NULL, "gpt", gpt_clk)
- _REGISTER_CLOCK("imx-uart.0", NULL, uart_clk)
- _REGISTER_CLOCK("imx-uart.1", NULL, uart_clk)
- _REGISTER_CLOCK("imx-uart.2", NULL, uart_clk)
+ _REGISTER_CLOCK("imx1-uart.0", NULL, uart_clk)
+ _REGISTER_CLOCK("imx1-uart.1", NULL, uart_clk)
+ _REGISTER_CLOCK("imx1-uart.2", NULL, uart_clk)
_REGISTER_CLOCK("imx-i2c.0", NULL, i2c_clk)
_REGISTER_CLOCK("imx1-cspi.0", NULL, spi_clk)
_REGISTER_CLOCK("imx1-cspi.1", NULL, spi_clk)
diff --git a/arch/arm/plat-mxc/devices/platform-imx-uart.c b/arch/arm/plat-mxc/devices/platform-imx-uart.c
index 3c854c2..01982a1 100644
--- a/arch/arm/plat-mxc/devices/platform-imx-uart.c
+++ b/arch/arm/plat-mxc/devices/platform-imx-uart.c
@@ -150,7 +150,7 @@ struct platform_device *__init imx_add_imx_uart_3irq(
},
};
- return imx_add_platform_device("imx-uart", data->id, res,
+ return imx_add_platform_device("imx1-uart", data->id, res,
ARRAY_SIZE(res), pdata, sizeof(*pdata));
}
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index a544731..8a6f4e1 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -48,7 +48,6 @@
#include <asm/io.h>
#include <asm/irq.h>
-#include <mach/hardware.h>
#include <mach/imx-uart.h>
/* Register definitions */
@@ -67,7 +66,8 @@
#define UBMR 0xa8 /* BRM Modulator Register */
#define UBRC 0xac /* Baud Rate Count Register */
#define MX2_ONEMS 0xb0 /* One Millisecond register */
-#define UTS (cpu_is_mx1() ? 0xd0 : 0xb4) /* UART Test Register */
+#define MX1_UTS 0xd0 /* UART Test Register on mx1 */
+#define MX2_UTS 0xb4 /* UART Test Register on mx2 and later */
/* UART Control Register Bit Fields.*/
#define URXD_CHARRDY (1<<15)
@@ -181,6 +181,17 @@
#define UART_NR 8
+enum imx_uart_type {
+ IMX1_UART,
+ IMX2_UART,
+};
+
+/* device type dependent stuff */
+struct imx_uart_data {
+ unsigned uts_reg;
+ unsigned type;
+};
+
struct imx_port {
struct uart_port port;
struct timer_list timer;
@@ -192,6 +203,7 @@ struct imx_port {
unsigned int irda_inv_tx:1;
unsigned short trcv_delay; /* transceiver delay */
struct clk *clk;
+ struct imx_uart_data *devdata;
};
#ifdef CONFIG_IRDA
@@ -200,6 +212,21 @@ struct imx_port {
#define USE_IRDA(sport) (0)
#endif
+static struct imx_uart_data imx_uart_devdata[] = {
+ [IMX1_UART] = {
+ .uts_reg = MX1_UTS,
+ .type = IMX1_UART,
+ },
+ [IMX2_UART] = {
+ .uts_reg = MX2_UTS,
+ .type = IMX2_UART,
+ },
+};
+
+#define UTS (sport->devdata->uts_reg)
+#define IS_IMX1_UART(sport) (sport->devdata->type == IMX1_UART)
+#define IS_IMX2_UART(sport) (sport->devdata->type == IMX2_UART)
+
/*
* Handle any change of modem status signal since we were last called.
*/
@@ -689,7 +716,7 @@ static int imx_startup(struct uart_port *port)
}
}
- if (!cpu_is_mx1()) {
+ if (IS_IMX2_UART(sport)) {
temp = readl(sport->port.membase + UCR3);
temp |= MX2_UCR3_RXDMUXSEL;
writel(temp, sport->port.membase + UCR3);
@@ -923,7 +950,7 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios,
writel(num, sport->port.membase + UBIR);
writel(denom, sport->port.membase + UBMR);
- if (!cpu_is_mx1())
+ if (IS_IMX2_UART(sport))
writel(sport->port.uartclk / div / 1000,
sport->port.membase + MX2_ONEMS);
@@ -1063,7 +1090,7 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
ucr1 = old_ucr1 = readl(sport->port.membase + UCR1);
old_ucr2 = readl(sport->port.membase + UCR2);
- if (cpu_is_mx1())
+ if (IS_IMX1_UART(sport))
ucr1 |= MX1_UCR1_UARTCLKEN;
ucr1 |= UCR1_UARTEN;
ucr1 &= ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN);
@@ -1263,6 +1290,7 @@ static int serial_imx_probe(struct platform_device *pdev)
init_timer(&sport->timer);
sport->timer.function = imx_timeout;
sport->timer.data = (unsigned long)sport;
+ sport->devdata = &imx_uart_devdata[pdev->id_entry->driver_data];
sport->clk = clk_get(&pdev->dev, "uart");
if (IS_ERR(sport->clk)) {
@@ -1335,12 +1363,26 @@ static int serial_imx_remove(struct platform_device *pdev)
return 0;
}
+static struct platform_device_id imx_uart_devtype[] = {
+ {
+ .name = "imx1-uart",
+ .driver_data = IMX1_UART,
+ }, {
+ .name = "imx-uart",
+ .driver_data = IMX2_UART,
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(platform, imx_uart_devtype);
+
static struct platform_driver serial_imx_driver = {
.probe = serial_imx_probe,
.remove = serial_imx_remove,
.suspend = serial_imx_suspend,
.resume = serial_imx_resume,
+ .id_table = imx_uart_devtype,
.driver = {
.name = "imx-uart",
.owner = THIS_MODULE,
--
1.7.4.1
--
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