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ARM: DaVinci: i2c setup

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Davinci I2C initialization infrastructure; will be used by EVM init.

[ dbrownell@users.sourceforge.net: pass platform data into init code ]

Signed-off-by: Komal Shah <komal_shah802003@yahoo.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
Komal Shah 2008-09-07 23:41:28 -07:00 committed by Kevin Hilman
parent dce1115bc3
commit d395e6ad98
3 changed files with 54 additions and 3 deletions
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2
arch/arm/mach-davinci/Makefile
View file

@ -5,7 +5,7 @@
# Common objects
obj-y := time.o irq.o clock.o serial.o io.o id.o psc.o \
gpio.o mux.o
gpio.o mux.o devices.o
# Board specific
obj-$(CONFIG_MACH_DAVINCI_EVM) += board-evm.o

48
arch/arm/mach-davinci/devices.c Normal file
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@ -0,0 +1,48 @@
/*
* mach-davinci/devices.c
*
* DaVinci platform device setup/initialization
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <asm/mach/map.h>
#include <mach/hardware.h>
#include <mach/i2c.h>
static struct resource i2c_resources[] = {
{
.start = DAVINCI_I2C_BASE,
.end = DAVINCI_I2C_BASE + 0x40,
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_I2C,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device davinci_i2c_device = {
.name = "i2c_davinci",
.id = 1,
.num_resources = ARRAY_SIZE(i2c_resources),
.resource = i2c_resources,
};
void __init davinci_init_i2c(struct davinci_i2c_platform_data *pdata)
{
davinci_i2c_device.dev.platform_data = pdata;
(void) platform_device_register(&davinci_i2c_device);
}

7
arch/arm/mach-davinci/include/mach/i2c.h
View file

@ -14,8 +14,11 @@
/* All frequencies are expressed in kHz */
struct davinci_i2c_platform_data {
unsigned int bus_freq; /* standard bus frequency */
unsigned int bus_delay; /* transaction delay */
unsigned int bus_freq; /* standard bus frequency (kHz) */
unsigned int bus_delay; /* post-transaction delay (usec) */
};
/* for board setup code */
void davinci_init_i2c(struct davinci_i2c_platform_data *);
#endif /* __ASM_ARCH_I2C_H */