On Tue, 09 Dec 2014, Jacek Anaszewski wrote:
> On 12/09/2014 09:50 AM, Lee Jones wrote:
> >On Wed, 03 Dec 2014, Jacek Anaszewski wrote:
> >
> >>Add "label" array for Device Tree strings with the name of a LED device
> >>and make flash_timeout a two element array, for caching the sub-led
> >>related flash timeout. Added is also an array for caching pointers to the
> >>sub-nodes representing sub-leds.
> >>
> >>Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
> >>Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> >>Cc: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
> >>Cc: Lee Jones <lee.jones@xxxxxxxxxx>
> >>---
> >> include/linux/mfd/max77693.h | 4 +++-
> >> 1 file changed, 3 insertions(+), 1 deletion(-)
> >>
> >>diff --git a/include/linux/mfd/max77693.h b/include/linux/mfd/max77693.h
> >>index f0b6585..c80ee99 100644
> >>--- a/include/linux/mfd/max77693.h
> >>+++ b/include/linux/mfd/max77693.h
> >>@@ -88,16 +88,18 @@ enum max77693_led_boost_mode {
> >> };
> >>
> >> struct max77693_led_platform_data {
> >>+ const char *label[2];
> >> u32 fleds[2];
> >> u32 iout_torch[2];for_each_available_child_of_node
> >> u32 iout_flash[2];
> >> u32 trigger[2];
> >> u32 trigger_type[2];
> >>+ u32 flash_timeout[2];
> >> u32 num_leds;
> >> u32 boost_mode;
> >>- u32 flash_timeout;
> >> u32 boost_vout;
> >> u32 low_vsys;
> >>+ struct device_node *sub_nodes[2];
> >
> >I haven't seen anyone do this before. Why can't you use the provided
> >OF functions to traverse through your tree?
>
> I use for_each_available_child_of_node when parsing DT node, but I
> need to cache the pointer to sub-node to be able to use it later
> when it needs to be passed to V4L2 sub-device which is then
> asynchronously matched by the phandle to sub-node.
>
> If it is not well seen to cache it in the platform data then
> I will find different way to accomplish this.
I haven't seen the end-driver for this, but why can't you use that
device's of_node pointer?
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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