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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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c1308f5d9d
SSBI is the Qualcomm single-wire serial bus interface used to connect the MSM devices to the PMIC and other devices. Since SSBI only supports a single slave, the driver gets the name of the slave device passed in from the board file through the master device's platform data. SSBI registers pretty early (postcore), so that the PMIC can come up before the board init. This is useful if the board init requires the use of gpios that are connected through the PMIC. Based on a patch by Dima Zavin <dima@android.com> that can be found at: http://android.git.kernel.org/?p=kernel/msm.git;a=commitdiff;h=eb060bac4 This patch adds PMIC Arbiter support for the MSM8660. The PMIC Arbiter is a hardware wrapper around the SSBI 2.0 controller that is designed to overcome concurrency issues and security limitations. A controller_type field is added to the platform data to specify the type of the SSBI controller (1.0, 2.0, or PMIC Arbiter). Change-Id: Ic37e1505f0ed7cfb8c5926a4c8d1770aa43e67cc Signed-off-by: Kenneth Heitke <kheitke@codeaurora.org>
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* Copyright (C) 2010 Google, Inc.
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* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
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* Author: Dima Zavin <dima@android.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _LINUX_MSM_SSBI_H
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#define _LINUX_MSM_SSBI_H
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#include <linux/types.h>
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struct msm_ssbi_slave_info {
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const char *name;
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void *platform_data;
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};
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enum msm_ssbi_controller_type {
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MSM_SBI_CTRL_SSBI = 0,
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MSM_SBI_CTRL_SSBI2,
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MSM_SBI_CTRL_PMIC_ARBITER,
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FSM_SBI_CTRL_SSBI,
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};
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struct msm_ssbi_platform_data {
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const char *rsl_id;
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struct msm_ssbi_slave_info slave;
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enum msm_ssbi_controller_type controller_type;
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};
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#ifdef CONFIG_MSM_SSBI
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int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len);
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int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len);
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#else
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static inline int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len)
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{
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return -ENXIO;
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}
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static inline int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len)
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{
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return -ENXIO;
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}
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#endif
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#endif
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