From de712eebbdbfc1a514ede554ba7d5d7db8ed4478 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomasz=20Mo=C5=84?= <desowin@gmail.com>
Date: Sun, 4 Dec 2011 08:24:08 +0000
Subject: [PATCH] Sansa Connect: Add TPS65021 (Power Management) driver.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31135 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/SOURCES                              |  1 +
 firmware/drivers/tps65021.c                   | 64 +++++++++++++++++++
 firmware/export/tps65021.h                    | 27 ++++++++
 .../sansa-connect/power-sansaconnect.c        |  2 +
 4 files changed, 94 insertions(+)
 create mode 100644 firmware/drivers/tps65021.c
 create mode 100644 firmware/export/tps65021.h

diff --git a/firmware/SOURCES b/firmware/SOURCES
index f5ee7873a2..5610b5ab5a 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -1118,6 +1118,7 @@ target/arm/tms320dm320/creative-zvm/usb-creativezvm.c
 
 #ifdef SANSA_CONNECT
 #ifndef SIMULATOR
+drivers/tps65021.c
 target/arm/mmu-arm.S
 target/arm/lcd-as-memframe.S
 target/arm/tms320dm320/sdmmc-dm320.c
diff --git a/firmware/drivers/tps65021.c b/firmware/drivers/tps65021.c
new file mode 100644
index 0000000000..d645b0d6f0
--- /dev/null
+++ b/firmware/drivers/tps65021.c
@@ -0,0 +1,64 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Driver for TPS 65021 Power Management IC
+ *
+ * Copyright (c) 2011 Tomasz Moń
+ *
+ * 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.
+ *
+ ****************************************************************************/
+#include "system.h"
+#include "config.h"
+#if CONFIG_I2C == I2C_DM320
+#include "i2c-dm320.h"
+#endif
+#include "logf.h"
+#include "tps65021.h"
+
+/* (7-bit) address is 0x48, the LSB is read/write flag */
+#define TPS65021_ADDR (0x48 << 1)
+
+static void tps65021_write_reg(unsigned reg, unsigned value)
+{
+    unsigned char data[2];
+
+    data[0] = reg;
+    data[1] = value;
+
+#if CONFIG_I2C == I2C_DM320
+    if (i2c_write(TPS65021_ADDR, data, 2) != 0)
+#else
+    #warning Implement tps65021_write_reg()
+#endif
+    {
+       logf("TPS65021 error reg=0x%x", reg);
+       return;
+    }
+}
+
+void tps65021_init(void)
+{
+#ifdef SANSA_CONNECT
+    /* PWM mode */
+    tps65021_write_reg(0x04, 0xB2);
+
+    /* Set core voltage to 1.5V */
+    tps65021_write_reg(0x06, 0x1C);
+
+    /* Set LCM (LDO1) to 2.85V, Set CODEC and USB (LDO2) to 1.8V */
+    tps65021_write_reg(0x08, 0x36);
+#endif
+}
diff --git a/firmware/export/tps65021.h b/firmware/export/tps65021.h
new file mode 100644
index 0000000000..2b28ccb37e
--- /dev/null
+++ b/firmware/export/tps65021.h
@@ -0,0 +1,27 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 TPS65021_H
+#define TPS65021_H
+
+void tps65021_init(void);
+
+#endif
diff --git a/firmware/target/arm/tms320dm320/sansa-connect/power-sansaconnect.c b/firmware/target/arm/tms320dm320/sansa-connect/power-sansaconnect.c
index 52ea9be1d9..bb03e4c0dd 100644
--- a/firmware/target/arm/tms320dm320/sansa-connect/power-sansaconnect.c
+++ b/firmware/target/arm/tms320dm320/sansa-connect/power-sansaconnect.c
@@ -28,9 +28,11 @@
 #include "backlight.h"
 #include "backlight-target.h"
 #include "avr-sansaconnect.h"
+#include "tps65021.h"
 
 void power_init(void)
 {
+    tps65021_init();
 }
 
 void power_off(void)