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https://github.com/u-boot/u-boot.git
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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 commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Microchip Corporation
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* Wenyou.Yang <wenyou.yang@microchip.com>
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*/
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#include <common.h>
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#include <clk.h>
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#include <dm.h>
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#include <timer.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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#define AT91_PIT_VALUE 0xfffff
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#define AT91_PIT_PITEN BIT(24) /* Timer Enabled */
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struct atmel_pit_regs {
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u32 mode;
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u32 status;
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u32 value;
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u32 value_image;
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};
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struct atmel_pit_plat {
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struct atmel_pit_regs *regs;
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};
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static u64 atmel_pit_get_count(struct udevice *dev)
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{
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struct atmel_pit_plat *plat = dev_get_plat(dev);
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struct atmel_pit_regs *const regs = plat->regs;
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u32 val = readl(®s->value_image);
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return timer_conv_64(val);
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}
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static int atmel_pit_probe(struct udevice *dev)
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{
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struct atmel_pit_plat *plat = dev_get_plat(dev);
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struct atmel_pit_regs *const regs = plat->regs;
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struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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struct clk clk;
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ulong clk_rate;
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int ret;
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ret = clk_get_by_index(dev, 0, &clk);
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if (ret)
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return -EINVAL;
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clk_rate = clk_get_rate(&clk);
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if (!clk_rate)
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return -EINVAL;
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uc_priv->clock_rate = clk_rate / 16;
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writel(AT91_PIT_VALUE | AT91_PIT_PITEN, ®s->mode);
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return 0;
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}
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static int atmel_pit_of_to_plat(struct udevice *dev)
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{
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struct atmel_pit_plat *plat = dev_get_plat(dev);
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plat->regs = dev_read_addr_ptr(dev);
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return 0;
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}
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static const struct timer_ops atmel_pit_ops = {
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.get_count = atmel_pit_get_count,
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};
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static const struct udevice_id atmel_pit_ids[] = {
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{ .compatible = "atmel,at91sam9260-pit" },
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{ }
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};
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U_BOOT_DRIVER(atmel_pit) = {
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.name = "atmel_pit",
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.id = UCLASS_TIMER,
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.of_match = atmel_pit_ids,
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.of_to_plat = atmel_pit_of_to_plat,
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.plat_auto = sizeof(struct atmel_pit_plat),
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.probe = atmel_pit_probe,
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.ops = &atmel_pit_ops,
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};
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