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When using OF_PLATDATA, the bind process between devices and drivers is performed trying to match compatible string with driver names. However driver names are not strictly defined, and also there are different names used when declaring a driver with U_BOOT_DRIVER, the name of the symbol used in the linker list and the used in the struct driver_info. In order to make things a bit more clear, rename the drivers names. This will also help for further OF_PLATDATA improvements, such as checking for valid driver names. Signed-off-by: Walter Lozano <walter.lozano@collabora.com> Reviewed-by: Simon Glass <sjg@chromium.org> Add a fix for sandbox of-platdata to avoid using an invalid ANSI colour: Signed-off-by: Simon Glass <sjg@chromium.org>
113 lines
2.5 KiB
C
113 lines
2.5 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 <malloc.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(atmel_at91rm9200_clk_peripheral) = {
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.name = "atmel_at91rm9200_clk_peripheral",
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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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