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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
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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>