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https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* cpld-gpio-bus.c: provides support for the CPLD GPIO bus found on some LaCie
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* boards (as the 2Big/5Big Network v2 and the 2Big NAS). This parallel GPIO
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* bus exposes two registers (address and data). Each of this register is made
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* up of several dedicated GPIOs. An extra GPIO is used to notify the CPLD that
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* the registers have been updated.
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*
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* Mostly this bus is used to configure the LEDs on LaCie boards.
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*
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* Copyright (C) 2013 Simon Guinot <simon.guinot@sequanux.org>
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*/
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#include <asm/arch/gpio.h>
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#include "cpld-gpio-bus.h"
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static void cpld_gpio_bus_set_addr(struct cpld_gpio_bus *bus, unsigned addr)
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{
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int pin;
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for (pin = 0; pin < bus->num_addr; pin++)
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kw_gpio_set_value(bus->addr[pin], (addr >> pin) & 1);
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}
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static void cpld_gpio_bus_set_data(struct cpld_gpio_bus *bus, unsigned data)
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{
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int pin;
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for (pin = 0; pin < bus->num_data; pin++)
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kw_gpio_set_value(bus->data[pin], (data >> pin) & 1);
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}
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static void cpld_gpio_bus_enable_select(struct cpld_gpio_bus *bus)
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{
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/* The transfer is enabled on the raising edge. */
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kw_gpio_set_value(bus->enable, 0);
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kw_gpio_set_value(bus->enable, 1);
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}
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void cpld_gpio_bus_write(struct cpld_gpio_bus *bus,
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unsigned addr, unsigned value)
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{
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cpld_gpio_bus_set_addr(bus, addr);
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cpld_gpio_bus_set_data(bus, value);
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cpld_gpio_bus_enable_select(bus);
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}
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