Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761387AbYJJO7S (ORCPT ); Fri, 10 Oct 2008 10:59:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760849AbYJJO6X (ORCPT ); Fri, 10 Oct 2008 10:58:23 -0400 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:42837 "EHLO opensource2.wolfsonmicro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1760772AbYJJO6U (ORCPT ); Fri, 10 Oct 2008 10:58:20 -0400 From: Mark Brown To: Samuel Ortiz , Liam Girdwood Cc: linux-kernel@vger.kernel.org, Mark Brown Subject: [PATCH 09/14] mfd: Add I2C control support for WM8350 Date: Fri, 10 Oct 2008 15:58:11 +0100 Message-Id: <1223650696-15552-9-git-send-email-broonie@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.5.6.5 In-Reply-To: <1223650696-15552-8-git-send-email-broonie@opensource.wolfsonmicro.com> References: <1223649928.6814.333.camel@dell-desktop.example.com> <1223650696-15552-1-git-send-email-broonie@opensource.wolfsonmicro.com> <1223650696-15552-2-git-send-email-broonie@opensource.wolfsonmicro.com> <1223650696-15552-3-git-send-email-broonie@opensource.wolfsonmicro.com> <1223650696-15552-4-git-send-email-broonie@opensource.wolfsonmicro.com> <1223650696-15552-5-git-send-email-broonie@opensource.wolfsonmicro.com> <1223650696-15552-6-git-send-email-broonie@opensource.wolfsonmicro.com> <1223650696-15552-7-git-send-email-broonie@opensource.wolfsonmicro.com> <1223650696-15552-8-git-send-email-broonie@opensource.wolfsonmicro.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4918 Lines: 180 Implement the I2C control interface for the WM8350. This code was originally written by Liam Girdwood and has been updated for submission by Mark Brown. Signed-off-by: Mark Brown --- drivers/mfd/Kconfig | 11 ++++ drivers/mfd/Makefile | 1 + drivers/mfd/wm8350-i2c.c | 120 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 132 insertions(+), 0 deletions(-) create mode 100644 drivers/mfd/wm8350-i2c.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index c903aa3..911439a 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -105,6 +105,17 @@ config MFD_WM8350_CONFIG_MODE_3 bool depends on MFD_WM8350 +config MFD_WM8350_I2C + tristate "Support Wolfson Microelectronics WM8350 with I2C" + select MFD_WM8350 + depends on I2C + help + The WM8350 is an integrated audio and power management + subsystem with watchdog and RTC functionality for embedded + systems. This option enables core support for the WM8350 with + I2C as the control interface. Additional options must be + selected to enable support for the functionality of the chip. + endmenu menu "Multimedia Capabilities Port drivers" diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index b0adca0..746d37b 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_MFD_TC6393XB) += tc6393xb.o obj-$(CONFIG_MFD_WM8400) += wm8400-core.o wm8350-objs := wm8350-core.o wm8350-regmap.o obj-$(CONFIG_MFD_WM8350) += wm8350.o +obj-$(CONFIG_MFD_WM8350_I2C) += wm8350-i2c.o obj-$(CONFIG_MFD_CORE) += mfd-core.o diff --git a/drivers/mfd/wm8350-i2c.c b/drivers/mfd/wm8350-i2c.c new file mode 100644 index 0000000..2b0569c --- /dev/null +++ b/drivers/mfd/wm8350-i2c.c @@ -0,0 +1,120 @@ +/* + * wm8350-i2c.c -- Generic I2C driver for Wolfson WM8350 PMIC + * + * This driver defines and configures the WM8350 for the Freescale i.MX32ADS. + * + * Copyright 2007, 2008 Wolfson Microelectronics PLC. + * + * Author: Liam Girdwood + * linux@wolfsonmicro.com + * + * 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. + * + */ + +#include +#include +#include +#include +#include +#include + +static int wm8350_i2c_read_device(struct wm8350 *wm8350, char reg, + int bytes, void *dest) +{ + int ret; + + ret = i2c_master_send(wm8350->i2c_client, ®, 1); + if (ret < 0) + return ret; + return i2c_master_recv(wm8350->i2c_client, dest, bytes); +} + +static int wm8350_i2c_write_device(struct wm8350 *wm8350, char reg, + int bytes, void *src) +{ + /* we add 1 byte for device register */ + u8 msg[(WM8350_MAX_REGISTER << 1) + 1]; + + if (bytes > ((WM8350_MAX_REGISTER << 1) + 1)) + return -EINVAL; + + msg[0] = reg; + memcpy(&msg[1], src, bytes); + return i2c_master_send(wm8350->i2c_client, msg, bytes + 1); +} + +static int wm8350_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct wm8350 *wm8350; + int ret = 0; + + wm8350 = kzalloc(sizeof(struct wm8350), GFP_KERNEL); + if (wm8350 == NULL) { + kfree(i2c); + return -ENOMEM; + } + + i2c_set_clientdata(i2c, wm8350); + wm8350->dev = &i2c->dev; + wm8350->i2c_client = i2c; + wm8350->read_dev = wm8350_i2c_read_device; + wm8350->write_dev = wm8350_i2c_write_device; + + ret = wm8350_device_init(wm8350); + if (ret < 0) + goto err; + + return ret; + +err: + kfree(wm8350); + return ret; +} + +static int wm8350_i2c_remove(struct i2c_client *i2c) +{ + struct wm8350 *wm8350 = i2c_get_clientdata(i2c); + + wm8350_device_exit(wm8350); + kfree(wm8350); + + return 0; +} + +static const struct i2c_device_id wm8350_i2c_id[] = { + { "wm8350", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id); + + +static struct i2c_driver wm8350_i2c_driver = { + .driver = { + .name = "wm8350", + .owner = THIS_MODULE, + }, + .probe = wm8350_i2c_probe, + .remove = wm8350_i2c_remove, + .id_table = wm8350_i2c_id, +}; + +static int __init wm8350_i2c_init(void) +{ + return i2c_add_driver(&wm8350_i2c_driver); +} +/* init early so consumer devices can complete system boot */ +subsys_initcall(wm8350_i2c_init); + +static void __exit wm8350_i2c_exit(void) +{ + i2c_del_driver(&wm8350_i2c_driver); +} +module_exit(wm8350_i2c_exit); + +MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC"); +MODULE_LICENSE("GPL"); -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/