93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2025 Marek Vasut <marek.vasut+renesas@mailbox.org>
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*/
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#define LOG_CATEGORY UCLASS_CLK
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#include <clk-uclass.h>
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#include <dm.h>
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#include <dm/device-internal.h>
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#include <linux/clk-provider.h>
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#include <log.h>
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struct clk_compound_rate {
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struct clk clk; /* This clock */
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struct clk mdlc; /* MDLC parent module clock */
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struct clk per; /* Peripheral parent clock */
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};
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static struct clk_compound_rate *to_clk_compound_rate(struct clk *clk)
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{
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return (struct clk_compound_rate *)dev_get_plat(clk->dev);
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}
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static int clk_compound_rate_enable(struct clk *clk)
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{
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struct clk_compound_rate *cc = to_clk_compound_rate(clk);
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return clk_enable(&cc->mdlc);
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}
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static int clk_compound_rate_disable(struct clk *clk)
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{
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struct clk_compound_rate *cc = to_clk_compound_rate(clk);
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return clk_disable(&cc->mdlc);
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}
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static ulong clk_compound_rate_get_rate(struct clk *clk)
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{
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struct clk_compound_rate *cc = to_clk_compound_rate(clk);
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return clk_get_rate(&cc->per);
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}
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static ulong clk_compound_rate_set_rate(struct clk *clk, ulong rate)
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{
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return 0; /* Set rate is not forwarded to SCP */
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}
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const struct clk_ops clk_compound_rate_ops = {
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.enable = clk_compound_rate_enable,
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.disable = clk_compound_rate_disable,
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.get_rate = clk_compound_rate_get_rate,
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.set_rate = clk_compound_rate_set_rate,
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};
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static int clk_compound_rate_of_to_plat(struct udevice *dev)
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{
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struct clk_compound_rate *cc = (struct clk_compound_rate *)dev_get_plat(dev);
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struct clk *clk = &cc->clk;
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int ret;
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clk->dev = dev;
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clk->id = CLK_ID(dev, 0);
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clk->enable_count = 0;
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ret = clk_get_by_index(dev, 0, &cc->mdlc);
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if (ret)
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return ret;
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ret = clk_get_by_index(dev, 1, &cc->per);
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if (ret)
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return ret;
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return 0;
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}
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static const struct udevice_id clk_compound_rate_match[] = {
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{ .compatible = "renesas,compound-clock", },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(renesas_compound_clock) = {
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.name = "compound-clock",
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.id = UCLASS_CLK,
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.of_match = clk_compound_rate_match,
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.of_to_plat = clk_compound_rate_of_to_plat,
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.plat_auto = sizeof(struct clk_compound_rate),
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.ops = &clk_compound_rate_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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