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https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
88 lines
1.8 KiB
C
88 lines
1.8 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_platdata {
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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_platdata *plat = dev_get_platdata(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_platdata *plat = dev_get_platdata(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_ofdata_to_platdata(struct udevice *dev)
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{
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struct atmel_pit_platdata *plat = dev_get_platdata(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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.ofdata_to_platdata = atmel_pit_ofdata_to_platdata,
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.platdata_auto = sizeof(struct atmel_pit_platdata),
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.probe = atmel_pit_probe,
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.ops = &atmel_pit_ops,
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};
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