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https://github.com/brain-hackers/u-boot-brain
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addf358bac
Currently when using OF_PLATDATA the binding between devices and drivers is done trying to match the compatible string in the node with a driver name. However, usually a single driver supports multiple compatible strings which causes that only devices which its compatible string matches a driver name get bound. To overcome this issue, this patch adds the U_BOOT_DRIVER_ALIAS macro, which generates no code at all, but allows an easy way to declare driver name aliases. Thanks to this, dtoc could be improve to look for the driver name based on its alias when it populates the U_BOOT_DEVICE entry. Signed-off-by: Walter Lozano <walter.lozano@collabora.com> Reviewed-by: Simon Glass <sjg@chromium.org>
123 lines
2.8 KiB
C
123 lines
2.8 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 <log.h>
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#include <dm/lists.h>
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#include <dm/util.h>
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#include "pmc.h"
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DECLARE_GLOBAL_DATA_PTR;
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static const struct udevice_id at91_pmc_match[] = {
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{ .compatible = "atmel,at91rm9200-pmc" },
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{ .compatible = "atmel,at91sam9260-pmc" },
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{ .compatible = "atmel,at91sam9g45-pmc" },
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{ .compatible = "atmel,at91sam9n12-pmc" },
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{ .compatible = "atmel,at91sam9x5-pmc" },
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{ .compatible = "atmel,sama5d3-pmc" },
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{ .compatible = "atmel,sama5d2-pmc" },
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{}
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};
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U_BOOT_DRIVER(atmel_at91rm9200_pmc) = {
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.name = "atmel_at91rm9200_pmc",
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.id = UCLASS_SIMPLE_BUS,
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.of_match = at91_pmc_match,
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};
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U_BOOT_DRIVER_ALIAS(atmel_at91rm9200_pmc, atmel_at91sam9260_pmc)
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/*---------------------------------------------------------*/
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int at91_pmc_core_probe(struct udevice *dev)
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{
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struct pmc_platdata *plat = dev_get_platdata(dev);
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dev = dev_get_parent(dev);
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plat->reg_base = (struct at91_pmc *)devfdt_get_addr_ptr(dev);
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return 0;
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}
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/**
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* at91_clk_sub_device_bind() - for the at91 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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int at91_clk_sub_device_bind(struct udevice *dev, const char *drv_name)
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{
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const void *fdt = gd->fdt_blob;
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int offset = dev_of_offset(dev);
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bool pre_reloc_only = !(gd->flags & GD_FLG_RELOC);
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const char *name;
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int ret;
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for (offset = fdt_first_subnode(fdt, offset);
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offset > 0;
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offset = fdt_next_subnode(fdt, offset)) {
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if (pre_reloc_only &&
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!ofnode_pre_reloc(offset_to_ofnode(offset)))
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continue;
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/*
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* If this node has "compatible" property, this is not
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* a clock sub-node, but a normal device. skip.
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*/
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fdt_get_property(fdt, offset, "compatible", &ret);
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if (ret >= 0)
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continue;
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if (ret != -FDT_ERR_NOTFOUND)
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return ret;
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name = fdt_get_name(fdt, offset, NULL);
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if (!name)
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return -EINVAL;
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ret = device_bind_driver_to_node(dev, drv_name, name,
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offset_to_ofnode(offset), NULL);
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if (ret)
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return ret;
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}
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return 0;
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}
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int at91_clk_of_xlate(struct clk *clk, struct ofnode_phandle_args *args)
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{
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int periph;
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if (args->args_count) {
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debug("Invalid args_count: %d\n", args->args_count);
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return -EINVAL;
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}
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periph = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(clk->dev), "reg",
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-1);
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if (periph < 0)
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return -EINVAL;
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clk->id = periph;
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return 0;
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}
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int at91_clk_probe(struct udevice *dev)
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{
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struct udevice *dev_periph_container, *dev_pmc;
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struct pmc_platdata *plat = dev_get_platdata(dev);
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dev_periph_container = dev_get_parent(dev);
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dev_pmc = dev_get_parent(dev_periph_container);
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plat->reg_base = (struct at91_pmc *)devfdt_get_addr_ptr(dev_pmc);
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return 0;
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}
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