mirror of
https://github.com/brain-hackers/u-boot-brain
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9e5935c04e
The patch is referred to at91 clock driver of Linux, to make the clock node descriptions in DT aligned with the Linux's. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Reviewed-by: Simon Glass <sjg@chromium.org>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*
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* Copyright (C) 2016 Atmel Corporation
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* Wenyou.Yang <wenyou.yang@atmel.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <clk-uclass.h>
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#include <dm/device.h>
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#include <linux/io.h>
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#include <mach/at91_pmc.h>
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#include "pmc.h"
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#define PERIPHERAL_ID_MIN 2
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#define PERIPHERAL_ID_MAX 31
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#define PERIPHERAL_MASK(id) (1 << ((id) & PERIPHERAL_ID_MAX))
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static int sam9x5_periph_clk_enable(struct clk *clk)
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{
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struct pmc_platdata *plat = dev_get_platdata(clk->dev);
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struct at91_pmc *pmc = plat->reg_base;
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if (clk->id < PERIPHERAL_ID_MIN)
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return -1;
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writel(clk->id & AT91_PMC_PCR_PID_MASK, &pmc->pcr);
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setbits_le32(&pmc->pcr, AT91_PMC_PCR_CMD_WRITE | AT91_PMC_PCR_EN);
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return 0;
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}
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static struct clk_ops sam9x5_periph_clk_ops = {
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.enable = sam9x5_periph_clk_enable,
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};
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static int sam9x5_periph_clk_bind(struct udevice *dev)
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{
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return at91_pmc_clk_node_bind(dev);
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}
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static int sam9x5_periph_clk_probe(struct udevice *dev)
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{
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return at91_pmc_core_probe(dev);
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}
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static const struct udevice_id sam9x5_periph_clk_match[] = {
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{ .compatible = "atmel,at91sam9x5-clk-peripheral" },
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{}
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};
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U_BOOT_DRIVER(sam9x5_periph_clk) = {
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.name = "sam9x5-periph-clk",
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.id = UCLASS_CLK,
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.of_match = sam9x5_periph_clk_match,
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.bind = sam9x5_periph_clk_bind,
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.probe = sam9x5_periph_clk_probe,
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.platdata_auto_alloc_size = sizeof(struct pmc_platdata),
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.ops = &sam9x5_periph_clk_ops,
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};
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