diff options
Diffstat (limited to 'arch/arm/plat-samsung/dev-i2c0.c')
| -rw-r--r-- | arch/arm/plat-samsung/dev-i2c0.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/arch/arm/plat-samsung/dev-i2c0.c b/arch/arm/plat-samsung/dev-i2c0.c index 3a601c1..0aa46b1 100644 --- a/arch/arm/plat-samsung/dev-i2c0.c +++ b/arch/arm/plat-samsung/dev-i2c0.c @@ -15,6 +15,8 @@ #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> @@ -24,6 +26,8 @@ #include <plat/devs.h> #include <plat/cpu.h> +#include <asm/io.h> + static struct resource s3c_i2c_resource[] = { [0] = { .start = S3C_PA_IIC, @@ -39,11 +43,7 @@ static struct resource s3c_i2c_resource[] = { struct platform_device s3c_device_i2c0 = { .name = "s3c2410-i2c", -#ifdef CONFIG_S3C_DEV_I2C1 .id = 0, -#else - .id = -1, -#endif .num_resources = ARRAY_SIZE(s3c_i2c_resource), .resource = s3c_i2c_resource, }; @@ -51,8 +51,8 @@ struct platform_device s3c_device_i2c0 = { static struct s3c2410_platform_i2c default_i2c_data0 __initdata = { .flags = 0, .slave_addr = 0x10, - .frequency = 100*1000, - .sda_delay = 100, + .frequency = 400*1000, + .sda_delay = S3C2410_IICLC_SDA_DELAY15 | S3C2410_IICLC_FILTER_ON, }; void __init s3c_i2c0_set_platdata(struct s3c2410_platform_i2c *pd) @@ -70,3 +70,31 @@ void __init s3c_i2c0_set_platdata(struct s3c2410_platform_i2c *pd) s3c_device_i2c0.dev.platform_data = npd; } + +void s3c_i2c0_force_stop() +{ + void __iomem *regs; + struct clk *clk; + unsigned long iicstat; + + regs = ioremap(S3C_PA_IIC, SZ_4K); + if(regs == NULL) { + printk(KERN_ERR "%s, cannot request IO\n", __func__); + return; + } + + clk = clk_get(&s3c_device_i2c0.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_i2c0_force_stop); + |