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ARM: mxs: Change duart device to use amba-pl011 

The mxs duart is actually an amba-pl011 device. This commit changes
the duart device code to dynamically allocate amba-pl011 device,
so that drivers/serial/amba-pl011.c can be used on mxs.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Shawn Guo 2011-01-04 14:20:52 +08:00 committed by Sascha Hauer
parent 48f76ed1cc
commit dbc4245bb5
11 changed files with 88 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/mach-mxs/Kconfig
View File

@ -15,7 +15,7 @@ comment "MXS platforms:"
config MACH_MX23EVK
bool "Support MX23EVK Platform"
select SOC_IMX23
select MXS_HAVE_PLATFORM_DUART
select MXS_HAVE_AMBA_DUART
default y
help
Include support for MX23EVK platform. This includes specific
@ -24,7 +24,7 @@ config MACH_MX23EVK
config MACH_MX28EVK
bool "Support MX28EVK Platform"
select SOC_IMX28
select MXS_HAVE_PLATFORM_DUART
select MXS_HAVE_AMBA_DUART
select MXS_HAVE_PLATFORM_FEC
default y
help

12
arch/arm/mach-mxs/clock-mx23.c
View File

@ -437,10 +437,12 @@ _DEFINE_CLOCK(clk32k_clk, XTAL, TIMROT_CLK32K_GATE, &ref_xtal_clk);
},
static struct clk_lookup lookups[] = {
_REGISTER_CLOCK("mxs-duart.0", NULL, uart_clk)
/* for amba bus driver */
_REGISTER_CLOCK("duart", "apb_pclk", xbus_clk)
/* for amba-pl011 driver */
_REGISTER_CLOCK("duart", NULL, uart_clk)
_REGISTER_CLOCK("rtc", NULL, rtc_clk)
_REGISTER_CLOCK(NULL, "hclk", hbus_clk)
_REGISTER_CLOCK(NULL, "xclk", xbus_clk)
_REGISTER_CLOCK(NULL, "usb", usb_clk)
_REGISTER_CLOCK(NULL, "audio", audio_clk)
_REGISTER_CLOCK(NULL, "pwm", pwm_clk)
@ -518,6 +520,12 @@ int __init mx23_clocks_init(void)
{
clk_misc_init();
clk_enable(&cpu_clk);
clk_enable(&hbus_clk);
clk_enable(&xbus_clk);
clk_enable(&emi_clk);
clk_enable(&uart_clk);
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
mxs_timer_init(&clk32k_clk, MX23_INT_TIMER0);

11
arch/arm/mach-mxs/clock-mx28.c
View File

@ -602,7 +602,10 @@ _DEFINE_CLOCK(fec_clk, ENET, DISABLE, &hbus_clk);
},
static struct clk_lookup lookups[] = {
_REGISTER_CLOCK("mxs-duart.0", NULL, uart_clk)
/* for amba bus driver */
_REGISTER_CLOCK("duart", "apb_pclk", xbus_clk)
/* for amba-pl011 driver */
_REGISTER_CLOCK("duart", NULL, uart_clk)
_REGISTER_CLOCK("imx28-fec.0", NULL, fec_clk)
_REGISTER_CLOCK("imx28-fec.1", NULL, fec_clk)
_REGISTER_CLOCK("fec.0", NULL, fec_clk)
@ -728,6 +731,12 @@ int __init mx28_clocks_init(void)
{
clk_misc_init();
clk_enable(&cpu_clk);
clk_enable(&hbus_clk);
clk_enable(&xbus_clk);
clk_enable(&emi_clk);
clk_enable(&uart_clk);
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
mxs_timer_init(&clk32k_clk, MX28_INT_TIMER0);

4
arch/arm/mach-mxs/devices-mx23.h
View File

@ -11,6 +11,6 @@
#include <mach/mx23.h>
#include <mach/devices-common.h>
extern const struct mxs_duart_data mx23_duart_data __initconst;
extern const struct amba_device mx23_duart_device __initconst;
#define mx23_add_duart() \
mxs_add_duart(&mx23_duart_data)
mxs_add_duart(&mx23_duart_device)

4
arch/arm/mach-mxs/devices-mx28.h
View File

@ -11,9 +11,9 @@
#include <mach/mx28.h>
#include <mach/devices-common.h>
extern const struct mxs_duart_data mx28_duart_data __initconst;
extern const struct amba_device mx28_duart_device __initconst;
#define mx28_add_duart() \
mxs_add_duart(&mx28_duart_data)
mxs_add_duart(&mx28_duart_device)
extern const struct mxs_fec_data mx28_fec_data[] __initconst;
#define mx28_add_fec(id, pdata) \

17
arch/arm/mach-mxs/devices.c
View File

@ -19,9 +19,8 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <mach/common.h>
#include <linux/amba/bus.h>
struct platform_device *__init mxs_add_platform_device_dmamask(
const char *name, int id,
@ -73,3 +72,17 @@ err:
return pdev;
}
int __init mxs_add_amba_device(const struct amba_device *dev)
{
struct amba_device *adev = kmalloc(sizeof(*adev), GFP_KERNEL);
if (!adev) {
pr_err("%s: failed to allocate memory", __func__);
return -ENOMEM;
}
*adev = *dev;
return amba_device_register(adev, &iomem_resource);
}

3
arch/arm/mach-mxs/devices/Kconfig
View File

@ -1,5 +1,6 @@
config MXS_HAVE_PLATFORM_DUART
config MXS_HAVE_AMBA_DUART
bool
select ARM_AMBA
config MXS_HAVE_PLATFORM_FEC
bool

2
arch/arm/mach-mxs/devices/Makefile
View File

@ -1,2 +1,2 @@
obj-$(CONFIG_MXS_HAVE_PLATFORM_DUART) += platform-duart.o
obj-$(CONFIG_MXS_HAVE_AMBA_DUART) += amba-duart.o
obj-$(CONFIG_MXS_HAVE_PLATFORM_FEC) += platform-fec.o

40
arch/arm/mach-mxs/devices/amba-duart.c Normal file
View File

@ -0,0 +1,40 @@
/*
* Copyright (C) 2009-2010 Pengutronix
* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
*
* Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 2 as published by the
* Free Software Foundation.
*/
#include <asm/irq.h>
#include <mach/mx23.h>
#include <mach/mx28.h>
#include <mach/devices-common.h>
#define MXS_AMBA_DUART_DEVICE(name, soc) \
const struct amba_device name##_device __initconst = { \
.dev = { \
.init_name = "duart", \
}, \
.res = { \
.start = soc ## _DUART_BASE_ADDR, \
.end = (soc ## _DUART_BASE_ADDR) + SZ_8K - 1, \
.flags = IORESOURCE_MEM, \
}, \
.irq = {soc ## _INT_DUART, NO_IRQ}, \
}
#ifdef CONFIG_SOC_IMX23
MXS_AMBA_DUART_DEVICE(mx23_duart, MX23);
#endif
#ifdef CONFIG_SOC_IMX28
MXS_AMBA_DUART_DEVICE(mx28_duart, MX28);
#endif
int __init mxs_add_duart(const struct amba_device *dev)
{
return mxs_add_amba_device(dev);
}

48
arch/arm/mach-mxs/devices/platform-duart.c
View File

@ -1,48 +0,0 @@
/*
* Copyright (C) 2009-2010 Pengutronix
* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
*
* Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 2 as published by the
* Free Software Foundation.
*/
#include <mach/mx23.h>
#include <mach/mx28.h>
#include <mach/devices-common.h>
#define mxs_duart_data_entry(soc) \
{ \
.iobase = soc ## _DUART_BASE_ADDR, \
.irq = soc ## _INT_DUART, \
}
#ifdef CONFIG_SOC_IMX23
const struct mxs_duart_data mx23_duart_data __initconst =
mxs_duart_data_entry(MX23);
#endif
#ifdef CONFIG_SOC_IMX28
const struct mxs_duart_data mx28_duart_data __initconst =
mxs_duart_data_entry(MX28);
#endif
struct platform_device *__init mxs_add_duart(
const struct mxs_duart_data *data)
{
struct resource res[] = {
{
.start = data->iobase,
.end = data->iobase + SZ_8K - 1,
.flags = IORESOURCE_MEM,
}, {
.start = data->irq,
.end = data->irq,
.flags = IORESOURCE_IRQ,
},
};
return mxs_add_platform_device("mxs-duart", 0, res, ARRAY_SIZE(res),
NULL, 0);
}

11
arch/arm/mach-mxs/include/mach/devices-common.h
View File

@ -9,6 +9,7 @@
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/amba/bus.h>
struct platform_device *mxs_add_platform_device_dmamask(
const char *name, int id,
@ -24,14 +25,10 @@ static inline struct platform_device *mxs_add_platform_device(
name, id, res, num_resources, data, size_data, 0);
}
int __init mxs_add_amba_device(const struct amba_device *dev);
/* duart */
struct mxs_duart_data {
resource_size_t iobase;
resource_size_t iosize;
resource_size_t irq;
};
struct platform_device *__init mxs_add_duart(
const struct mxs_duart_data *data);
int __init mxs_add_duart(const struct amba_device *dev);
/* fec */
#include <linux/fec.h>