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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
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* Copyright (C) 2011 Missing Link Electronics
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* Joachim Foerster <joachim@missinglinkelectronics.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <malloc.h>
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#include <fdtdec.h>
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#include <asm/global_data.h>
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#include <asm/io.h>
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#include <asm/gpio.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct altera_pio_regs {
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u32 data; /* Data register */
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u32 direction; /* Direction register */
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};
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struct altera_pio_plat {
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struct altera_pio_regs *regs;
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int gpio_count;
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const char *bank_name;
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};
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static int altera_pio_direction_input(struct udevice *dev, unsigned pin)
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{
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struct altera_pio_plat *plat = dev_get_plat(dev);
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struct altera_pio_regs *const regs = plat->regs;
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clrbits_le32(®s->direction, 1 << pin);
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return 0;
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}
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static int altera_pio_direction_output(struct udevice *dev, unsigned pin,
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int val)
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{
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struct altera_pio_plat *plat = dev_get_plat(dev);
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struct altera_pio_regs *const regs = plat->regs;
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if (val)
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setbits_le32(®s->data, 1 << pin);
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else
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clrbits_le32(®s->data, 1 << pin);
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/* change the data first, then the direction. to avoid glitch */
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setbits_le32(®s->direction, 1 << pin);
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return 0;
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}
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static int altera_pio_get_value(struct udevice *dev, unsigned pin)
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{
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struct altera_pio_plat *plat = dev_get_plat(dev);
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struct altera_pio_regs *const regs = plat->regs;
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return !!(readl(®s->data) & (1 << pin));
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}
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static int altera_pio_set_value(struct udevice *dev, unsigned pin, int val)
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{
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struct altera_pio_plat *plat = dev_get_plat(dev);
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struct altera_pio_regs *const regs = plat->regs;
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if (val)
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setbits_le32(®s->data, 1 << pin);
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else
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clrbits_le32(®s->data, 1 << pin);
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return 0;
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}
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static int altera_pio_probe(struct udevice *dev)
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{
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struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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struct altera_pio_plat *plat = dev_get_plat(dev);
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uc_priv->gpio_count = plat->gpio_count;
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uc_priv->bank_name = plat->bank_name;
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return 0;
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}
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static int altera_pio_of_to_plat(struct udevice *dev)
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{
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struct altera_pio_plat *plat = dev_get_plat(dev);
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plat->regs = map_physmem(dev_read_addr(dev),
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sizeof(struct altera_pio_regs),
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MAP_NOCACHE);
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plat->gpio_count = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
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"altr,gpio-bank-width", 32);
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plat->bank_name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
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"gpio-bank-name", NULL);
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return 0;
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}
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static const struct dm_gpio_ops altera_pio_ops = {
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.direction_input = altera_pio_direction_input,
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.direction_output = altera_pio_direction_output,
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.get_value = altera_pio_get_value,
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.set_value = altera_pio_set_value,
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};
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static const struct udevice_id altera_pio_ids[] = {
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{ .compatible = "altr,pio-1.0" },
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{ }
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};
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U_BOOT_DRIVER(altera_pio) = {
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.name = "altera_pio",
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.id = UCLASS_GPIO,
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.of_match = altera_pio_ids,
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.ops = &altera_pio_ops,
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.of_to_plat = altera_pio_of_to_plat,
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.plat_auto = sizeof(struct altera_pio_plat),
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.probe = altera_pio_probe,
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};
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