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Input: atmel_mxt_ts - download device config using firmware loader

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The existing implementation which encodes the configuration as a binary
blob in platform data is unsatisfactory since it requires a kernel
recompile for the configuration to be changed, and it doesn't deal well
with firmware changes that move values around on the chip.

Atmel define an ASCII format for the configuration which can be exported
from their tools. This patch implements a parser for that format which
loads the configuration via the firmware loader and sends it to the MXT
chip.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Acked-by: Benson Leung <bleung@chromium.org>
Acked-by: Yufeng Shen <miletus@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Nick Dyer 2014-07-23 12:38:48 -07:00 • committed by Dmitry Torokhov
parent 78188be3e5
commit 50a77c658b
3 changed files with 212 additions and 89 deletions
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3
include/linux/i2c/atmel_mxt_ts.h
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@ -17,9 +17,6 @@
/* The platform data for the Atmel maXTouch touchscreen driver */
struct mxt_platform_data {
const u8 *config;
size_t config_length;
u32 config_crc;
unsigned long irqflags;
u8 t19_num_keys;
const unsigned int *t19_keymap;