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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 3 normalized pattern(s): 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 program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details 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 [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details 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 [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for the Conexant CX25821 PCIe bridge
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*
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* Copyright (C) 2009 Conexant Systems Inc.
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* Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
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*/
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#include <linux/module.h>
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#include "cx25821.h"
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/********************* GPIO stuffs *********************/
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void cx25821_set_gpiopin_direction(struct cx25821_dev *dev,
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int pin_number, int pin_logic_value)
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{
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int bit = pin_number;
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u32 gpio_oe_reg = GPIO_LO_OE;
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u32 gpio_register = 0;
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u32 value = 0;
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/* Check for valid pinNumber */
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if (pin_number >= 47)
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return;
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if (pin_number > 31) {
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bit = pin_number - 31;
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gpio_oe_reg = GPIO_HI_OE;
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}
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/* Here we will make sure that the GPIOs 0 and 1 are output. keep the
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* rest as is */
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gpio_register = cx_read(gpio_oe_reg);
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if (pin_logic_value == 1)
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value = gpio_register | Set_GPIO_Bit(bit);
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else
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value = gpio_register & Clear_GPIO_Bit(bit);
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cx_write(gpio_oe_reg, value);
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}
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EXPORT_SYMBOL(cx25821_set_gpiopin_direction);
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static void cx25821_set_gpiopin_logicvalue(struct cx25821_dev *dev,
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int pin_number, int pin_logic_value)
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{
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int bit = pin_number;
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u32 gpio_reg = GPIO_LO;
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u32 value = 0;
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/* Check for valid pinNumber */
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if (pin_number >= 47)
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return;
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/* change to output direction */
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cx25821_set_gpiopin_direction(dev, pin_number, 0);
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if (pin_number > 31) {
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bit = pin_number - 31;
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gpio_reg = GPIO_HI;
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}
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value = cx_read(gpio_reg);
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if (pin_logic_value == 0)
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value &= Clear_GPIO_Bit(bit);
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else
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value |= Set_GPIO_Bit(bit);
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cx_write(gpio_reg, value);
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}
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void cx25821_gpio_init(struct cx25821_dev *dev)
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{
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if (dev == NULL)
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return;
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switch (dev->board) {
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case CX25821_BOARD_CONEXANT_ATHENA10:
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default:
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/* set GPIO 5 to select the path for Medusa/Athena */
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cx25821_set_gpiopin_logicvalue(dev, 5, 1);
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msleep(20);
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break;
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}
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}
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