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[ARM] 5585/1: nomadik: add gpio-i2c devices

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Signed-off-by: Alessandro Rubini <rubini@unipv.it>
Acked-by: Andrea Gallo <andrea.gallo@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Alessandro Rubini
2009-07-02 15:29:22 +01:00
committed by Russell King
parent 2ec1d35945
commit 63796b740b
3 changed files with 75 additions and 0 deletions
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7
arch/arm/mach-nomadik/Kconfig
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@@ -11,4 +11,11 @@ endmenu
config NOMADIK_8815 config NOMADIK_8815
bool bool
config I2C_BITBANG_8815NHK
tristate "Driver for bit-bang busses found on the 8815 NHK"
depends on I2C && MACH_NOMADIK_8815NHK
select I2C_ALGOBIT
default y
endif endif

3
arch/arm/mach-nomadik/Makefile
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@@ -14,3 +14,6 @@ obj-$(CONFIG_NOMADIK_8815) += cpu-8815.o
# Specific board support # Specific board support
obj-$(CONFIG_MACH_NOMADIK_8815NHK) += board-nhk8815.o obj-$(CONFIG_MACH_NOMADIK_8815NHK) += board-nhk8815.o
# Nomadik extra devices
obj-$(CONFIG_I2C_BITBANG_8815NHK) += i2c-8815nhk.o

65
arch/arm/mach-nomadik/i2c-8815nhk.c Normal file
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@@ -0,0 +1,65 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/i2c-gpio.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
/*
* There are two busses in the 8815NHK.
* They could, in theory, be driven by the hardware component, but we
* use bit-bang through GPIO by now, to keep things simple
*/
static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {
/* keep defaults for timeouts; pins are push-pull bidirectional */
.scl_pin = 62,
.sda_pin = 63,
};
static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {
/* keep defaults for timeouts; pins are push-pull bidirectional */
.scl_pin = 53,
.sda_pin = 54,
};
/* first bus: GPIO XX and YY */
static struct platform_device nhk8815_i2c_dev0 = {
.name = "i2c-gpio",
.id = 0,
.dev = {
.platform_data = &nhk8815_i2c_data0,
},
};
/* second bus: GPIO XX and YY */
static struct platform_device nhk8815_i2c_dev1 = {
.name = "i2c-gpio",
.id = 1,
.dev = {
.platform_data = &nhk8815_i2c_data1,
},
};
static int __init nhk8815_i2c_init(void)
{
nmk_gpio_set_mode(nhk8815_i2c_data0.scl_pin, NMK_GPIO_ALT_GPIO);
nmk_gpio_set_mode(nhk8815_i2c_data0.sda_pin, NMK_GPIO_ALT_GPIO);
platform_device_register(&nhk8815_i2c_dev0);
nmk_gpio_set_mode(nhk8815_i2c_data1.scl_pin, NMK_GPIO_ALT_GPIO);
nmk_gpio_set_mode(nhk8815_i2c_data1.sda_pin, NMK_GPIO_ALT_GPIO);
platform_device_register(&nhk8815_i2c_dev1);
return 0;
}
static void __exit nhk8815_i2c_exit(void)
{
platform_device_unregister(&nhk8815_i2c_dev0);
platform_device_unregister(&nhk8815_i2c_dev1);
return;
}
module_init(nhk8815_i2c_init);
module_exit(nhk8815_i2c_exit);