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https://github.com/AsahiLinux/u-boot
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
163 lines
3.1 KiB
C
163 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* (C) Copyright 2015 Google, Inc
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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 <errno.h>
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#include <malloc.h>
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#include <asm/clk.h>
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struct sandbox_clk_priv {
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bool probed;
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ulong rate[SANDBOX_CLK_ID_COUNT];
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bool enabled[SANDBOX_CLK_ID_COUNT];
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bool requested[SANDBOX_CLK_ID_COUNT];
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};
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static ulong sandbox_clk_get_rate(struct clk *clk)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
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if (!priv->probed)
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return -ENODEV;
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if (clk->id >= SANDBOX_CLK_ID_COUNT)
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return -EINVAL;
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return priv->rate[clk->id];
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}
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static ulong sandbox_clk_set_rate(struct clk *clk, ulong rate)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
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ulong old_rate;
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if (!priv->probed)
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return -ENODEV;
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if (clk->id >= SANDBOX_CLK_ID_COUNT)
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return -EINVAL;
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if (!rate)
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return -EINVAL;
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old_rate = priv->rate[clk->id];
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priv->rate[clk->id] = rate;
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return old_rate;
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}
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static int sandbox_clk_enable(struct clk *clk)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
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if (!priv->probed)
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return -ENODEV;
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if (clk->id >= SANDBOX_CLK_ID_COUNT)
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return -EINVAL;
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priv->enabled[clk->id] = true;
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return 0;
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}
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static int sandbox_clk_disable(struct clk *clk)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
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if (!priv->probed)
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return -ENODEV;
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if (clk->id >= SANDBOX_CLK_ID_COUNT)
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return -EINVAL;
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priv->enabled[clk->id] = false;
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return 0;
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}
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static int sandbox_clk_request(struct clk *clk)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
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if (clk->id >= SANDBOX_CLK_ID_COUNT)
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return -EINVAL;
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priv->requested[clk->id] = true;
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return 0;
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}
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static int sandbox_clk_free(struct clk *clk)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
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if (clk->id >= SANDBOX_CLK_ID_COUNT)
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return -EINVAL;
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priv->requested[clk->id] = false;
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return 0;
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}
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static struct clk_ops sandbox_clk_ops = {
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.get_rate = sandbox_clk_get_rate,
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.set_rate = sandbox_clk_set_rate,
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.enable = sandbox_clk_enable,
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.disable = sandbox_clk_disable,
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.request = sandbox_clk_request,
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.rfree = sandbox_clk_free,
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};
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static int sandbox_clk_probe(struct udevice *dev)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(dev);
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priv->probed = true;
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return 0;
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}
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static const struct udevice_id sandbox_clk_ids[] = {
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{ .compatible = "sandbox,clk" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_clk) = {
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.name = "sandbox_clk",
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.id = UCLASS_CLK,
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.of_match = sandbox_clk_ids,
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.ops = &sandbox_clk_ops,
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.probe = sandbox_clk_probe,
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.priv_auto = sizeof(struct sandbox_clk_priv),
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};
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ulong sandbox_clk_query_rate(struct udevice *dev, int id)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(dev);
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if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
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return -EINVAL;
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return priv->rate[id];
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}
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int sandbox_clk_query_enable(struct udevice *dev, int id)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(dev);
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if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
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return -EINVAL;
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return priv->enabled[id];
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}
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int sandbox_clk_query_requested(struct udevice *dev, int id)
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{
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struct sandbox_clk_priv *priv = dev_get_priv(dev);
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if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
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return -EINVAL;
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return priv->requested[id];
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}
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