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https://github.com/edk2-porting/linux-next.git
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e75892715d
This patch adds the basic infrastructure and a few stub drivers for devices that are connected via I2C busses. The infrastructure will be used to replace and extend the support that is scattered throughout viafb. The stub drivers are not very useful yet but they show how the infrastructure works, provide information about the chips integrated into a system and maybe gather some testers as it would be very difficult for a single person to get a sane test environment. The only thing this actually does is probing the I2C busses which will hopefully not cause any regressions. Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/*
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* Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation;
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* either version 2, or (at your option) any later version.
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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 WARRANTIES OR REPRESENTATIONS; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE.See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* driver for Silicon Image SiI 164 PanelLink Transmitter
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*/
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#include <linux/slab.h>
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#include "via_aux.h"
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static const char *name = "SiI 164 PanelLink Transmitter";
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static void probe(struct via_aux_bus *bus, u8 addr)
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{
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struct via_aux_drv drv = {
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.bus = bus,
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.addr = addr,
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.name = name};
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/* check vendor id and device id */
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const u8 id[] = {0x01, 0x00, 0x06, 0x00}, len = ARRAY_SIZE(id);
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u8 tmp[len];
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if (!via_aux_read(&drv, 0x00, tmp, len) || memcmp(id, tmp, len))
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return;
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printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
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via_aux_add(&drv);
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}
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void via_aux_sii164_probe(struct via_aux_bus *bus)
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{
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u8 i;
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for (i = 0x38; i <= 0x3F; i++)
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probe(bus, i);
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}
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