From 03e6cbec8fb23c02cb832194c27b055d8989c8e3 Mon Sep 17 00:00:00 2001 From: Lorenzo Miori Date: Wed, 26 Apr 2017 21:16:12 +0200 Subject: Samsung YP-R0/YP-R1: use Linux i2c-dev for radio chip access Linux offers the high-level i2c-dev driver to directly access the i2c bus(ses) on the system. This system device is used to get rid of the (rather silly) radio chip kernel module for ypr0 target and correctly enables radio access also for the ypr1 target. fm-radio chip is located on i2c-0 bus on the ypr0 target while it is located on i2c-1 bus on the ypr1 target. Power-up (RST) pin is also handled for both targets, which is wired to another GPIO of the i.MX 37 platform. Additionally, this patch simplifies the RDS low-level handling by exploiting the Si4709 debug interface which comes with a mutex protection as free bonus. Change-Id: I839282bec4a27ad0ad8403c5a8dd86963b77e1bf --- .../target/hosted/samsungypr/ypr0/i2c-target.h | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 firmware/target/hosted/samsungypr/ypr0/i2c-target.h (limited to 'firmware/target/hosted/samsungypr/ypr0/i2c-target.h') diff --git a/firmware/target/hosted/samsungypr/ypr0/i2c-target.h b/firmware/target/hosted/samsungypr/ypr0/i2c-target.h new file mode 100644 index 0000000000..351988844e --- /dev/null +++ b/firmware/target/hosted/samsungypr/ypr0/i2c-target.h @@ -0,0 +1,30 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * + * Module wrapper for SI4709 FM Radio Chip, using /dev/si470x (si4709.ko) + * Samsung YP-R0 & Samsung YP-R1 + * + * Copyright (c) 2017 Lorenzo Miori + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +#ifndef I2C_TARGET_H_ +#define I2C_TARGET_H_ + +/** Define the FM Radio Chip I2C bus */ +#define I2C_BUS_FM_RADIO ("/dev/i2c-0") + +#endif /* I2C_TARGET_H_ */ -- cgit v1.2.3