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https://github.com/brain-hackers/u-boot-brain
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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>
90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* DaVinci pinmux functions.
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*
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* Copyright (C) 2009 Nick Thompson, GE Fanuc Ltd, <nick.thompson@gefanuc.com>
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* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
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* Copyright (C) 2008 Lyrtech <www.lyrtech.com>
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* Copyright (C) 2004 Texas Instruments.
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*/
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#include <common.h>
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#include <asm/arch/hardware.h>
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#include <asm/io.h>
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#include <asm/arch/davinci_misc.h>
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/*
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* Change the setting of a pin multiplexer field.
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*
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* Takes an array of pinmux settings similar to:
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*
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* struct pinmux_config uart_pins[] = {
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* { &davinci_syscfg_regs->pinmux[8], 2, 7 },
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* { &davinci_syscfg_regs->pinmux[9], 2, 0 }
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* };
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*
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* Stepping through the array, each pinmux[n] register has the given value
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* set in the pin mux field specified.
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*
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* The number of pins in the array must be passed (ARRAY_SIZE can provide
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* this value conveniently).
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*
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* Returns 0 if all field numbers and values are in the correct range,
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* else returns -1.
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*/
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int davinci_configure_pin_mux(const struct pinmux_config *pins,
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const int n_pins)
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{
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int i;
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/* check for invalid pinmux values */
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for (i = 0; i < n_pins; i++) {
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if (pins[i].field >= PIN_MUX_NUM_FIELDS ||
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(pins[i].value & ~PIN_MUX_FIELD_MASK) != 0)
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return -1;
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}
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/* configure the pinmuxes */
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for (i = 0; i < n_pins; i++) {
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const int offset = pins[i].field * PIN_MUX_FIELD_SIZE;
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const unsigned int value = pins[i].value << offset;
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const unsigned int mask = PIN_MUX_FIELD_MASK << offset;
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const dv_reg *mux = pins[i].mux;
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writel(value | (readl(mux) & (~mask)), mux);
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}
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return 0;
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}
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/*
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* Configure multiple pinmux resources.
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*
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* Takes an pinmux_resource array of pinmux_config and pin counts:
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*
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* const struct pinmux_resource pinmuxes[] = {
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* PINMUX_ITEM(uart_pins),
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* PINMUX_ITEM(i2c_pins),
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* };
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*
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* The number of items in the array must be passed (ARRAY_SIZE can provide
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* this value conveniently).
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*
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* Each item entry is configured in the defined order. If configuration
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* of any item fails, -1 is returned and none of the following items are
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* configured. On success, 0 is returned.
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*/
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int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
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const int n_items)
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{
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int i;
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for (i = 0; i < n_items; i++) {
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if (davinci_configure_pin_mux(item[i].pins,
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item[i].n_pins) != 0)
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return -1;
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}
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return 0;
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}
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