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/* linux/arch/arm/plat-s3c/dev-i2c2.c
*
* Copyright 2008-2009 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* S3C series device definition for i2c device 2
*
* 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 <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <mach/irqs.h>
#include <mach/map.h>
#include <plat/regs-iic.h>
#include <plat/iic.h>
#include <plat/devs.h>
#include <plat/cpu.h>
#include <asm/io.h>
static struct resource s3c_i2c_resource[] = {
[0] = {
.start = S3C_PA_IIC2,
.end = S3C_PA_IIC2 + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_IIC2,
.end = IRQ_IIC2,
.flags = IORESOURCE_IRQ,
},
};
struct platform_device s3c_device_i2c2 = {
.name = "s3c2410-i2c",
.id = 2,
.num_resources = ARRAY_SIZE(s3c_i2c_resource),
.resource = s3c_i2c_resource,
};
static struct s3c2410_platform_i2c default_i2c_data2 __initdata = {
.flags = 0,
.bus_num = 2,
.slave_addr = 0x10,
.frequency = 400*1000,
.sda_delay = S3C2410_IICLC_SDA_DELAY5 | S3C2410_IICLC_FILTER_ON,
};
void __init s3c_i2c2_set_platdata(struct s3c2410_platform_i2c *pd)
{
struct s3c2410_platform_i2c *npd;
if (!pd)
pd = &default_i2c_data2;
npd = kmemdup(pd, sizeof(struct s3c2410_platform_i2c), GFP_KERNEL);
if (!npd)
printk(KERN_ERR "%s: no memory for platform data\n", __func__);
else if (!npd->cfg_gpio)
npd->cfg_gpio = s3c_i2c2_cfg_gpio;
s3c_device_i2c2.dev.platform_data = npd;
}
void s3c_i2c2_force_stop()
{
void __iomem *regs;
struct clk *clk;
unsigned long iicstat;
regs = ioremap(S3C_PA_IIC2, SZ_4K);
if(regs == NULL) {
printk(KERN_ERR "%s, cannot request IO\n", __func__);
return;
}
clk = clk_get(&s3c_device_i2c2.dev, "i2c");
if(clk == NULL || IS_ERR(clk)) {
printk(KERN_ERR "%s, cannot get cloock\n", __func__);
return;
}
clk_enable(clk);
iicstat = readl(regs + S3C2410_IICSTAT);
writel(iicstat & ~S3C2410_IICSTAT_TXRXEN, regs + S3C2410_IICSTAT);
clk_disable(clk);
iounmap(regs);
}
EXPORT_SYMBOL(s3c_i2c2_force_stop);
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