mirror of
https://github.com/AsahiLinux/u-boot
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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>
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#include <common.h>
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#include <clk-uclass.h>
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#include <dm.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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enum periph_clk_type {
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CLK_PERIPH_AT91RM9200 = 0,
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CLK_PERIPH_AT91SAM9X5,
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};
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/**
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* sam9x5_periph_clk_bind() - for the periph clock driver
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* Recursively bind its children as clk devices.
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*
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* @return: 0 on success, or negative error code on failure
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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_clk_sub_device_bind(dev, "periph-clk");
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}
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static const struct udevice_id sam9x5_periph_clk_match[] = {
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{
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.compatible = "atmel,at91rm9200-clk-peripheral",
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.data = CLK_PERIPH_AT91RM9200,
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},
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{
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.compatible = "atmel,at91sam9x5-clk-peripheral",
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.data = CLK_PERIPH_AT91SAM9X5,
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},
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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_MISC,
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.of_match = sam9x5_periph_clk_match,
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.bind = sam9x5_periph_clk_bind,
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};
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/*---------------------------------------------------------*/
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static int 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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enum periph_clk_type clk_type;
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void *addr;
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if (clk->id < PERIPHERAL_ID_MIN)
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return -1;
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clk_type = dev_get_driver_data(dev_get_parent(clk->dev));
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if (clk_type == CLK_PERIPH_AT91RM9200) {
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addr = &pmc->pcer;
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if (clk->id > PERIPHERAL_ID_MAX)
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addr = &pmc->pcer1;
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setbits_le32(addr, PERIPHERAL_MASK(clk->id));
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} else {
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writel(clk->id & AT91_PMC_PCR_PID_MASK, &pmc->pcr);
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setbits_le32(&pmc->pcr,
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AT91_PMC_PCR_CMD_WRITE | AT91_PMC_PCR_EN);
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}
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return 0;
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}
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static ulong periph_get_rate(struct clk *clk)
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{
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struct udevice *dev;
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struct clk clk_dev;
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ulong clk_rate;
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int ret;
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dev = dev_get_parent(clk->dev);
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ret = clk_get_by_index(dev, 0, &clk_dev);
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if (ret)
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return ret;
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clk_rate = clk_get_rate(&clk_dev);
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clk_free(&clk_dev);
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return clk_rate;
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}
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static struct clk_ops periph_clk_ops = {
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.of_xlate = at91_clk_of_xlate,
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.enable = periph_clk_enable,
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.get_rate = periph_get_rate,
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};
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U_BOOT_DRIVER(clk_periph) = {
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.name = "periph-clk",
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.id = UCLASS_CLK,
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.platdata_auto_alloc_size = sizeof(struct pmc_platdata),
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.probe = at91_clk_probe,
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.ops = &periph_clk_ops,
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};
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