On Fri, 2011-05-20 at 21:16 +0530, Avinash.H.M wrote:
> The sequence of _ocp_softreset doesn't work for i2c. The i2c module has a
> special sequence to reset the module. The sequence is
> - Disable the I2C.
> - Write to SOFTRESET bit.
> - Enable the I2C.
> - Poll on the RESETDONE bit.
> The sequence is implemented as a function and the i2c_class is updated with
> the correct 'reset' pointer. omap_hwmod_softreset function is implemented
> which triggers the softreset by writing into sysconfig register. On following
> this sequence, i2c module resets properly and timeouts are not seen.
>
> Cc: Rajendra Nayak <rnayak@xxxxxx>
> Cc: Paul Walmsley <paul@xxxxxxxxx>
> Cc: Benoit Cousson <b-cousson@xxxxxx>
> Cc: Kevin Hilman <khilman@xxxxxx>
> Signed-off-by: Avinash.H.M <avinashhm@xxxxxx>
> ---
<snip>
> diff --git a/arch/arm/plat-omap/include/plat/i2c.h b/arch/arm/plat-omap/include/plat/i2c.h
> index 878d632..3ffb94e 100644
> --- a/arch/arm/plat-omap/include/plat/i2c.h
> +++ b/arch/arm/plat-omap/include/plat/i2c.h
> @@ -23,6 +23,8 @@
>
> #include <linux/i2c.h>
>
> +#include <plat/omap_hwmod.h>
> +
> #if defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
> extern int omap_register_i2c_bus(int bus_id, u32 clkrate,
> struct i2c_board_info const *info,
> @@ -52,4 +54,6 @@ struct omap_i2c_dev_attr {
> void __init omap1_i2c_mux_pins(int bus_id);
> void __init omap2_i2c_mux_pins(int bus_id);
>
> +int omap_i2c_reset(struct omap_hwmod *oh);
> +
It's not necessary to include omap_hwmod.h, just declare
struct omap_hwmod;
Tomi
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