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- // SPDX-License-Identifier: GPL-2.0
- /*
- * (C) Copyright 2015 Google, Inc
- */
- #include <common.h>
- #include <clk-uclass.h>
- #include <dm.h>
- #include <errno.h>
- #include <malloc.h>
- #include <asm/clk.h>
- #include <linux/clk-provider.h>
- static ulong sandbox_clk_get_rate(struct clk *clk)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
- if (!priv->probed)
- return -ENODEV;
- if (clk->id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- return priv->rate[clk->id];
- }
- static ulong sandbox_clk_round_rate(struct clk *clk, ulong rate)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
- if (!priv->probed)
- return -ENODEV;
- if (clk->id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- if (!rate)
- return -EINVAL;
- return rate;
- }
- static ulong sandbox_clk_set_rate(struct clk *clk, ulong rate)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
- ulong old_rate;
- if (!priv->probed)
- return -ENODEV;
- if (clk->id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- if (!rate)
- return -EINVAL;
- old_rate = priv->rate[clk->id];
- priv->rate[clk->id] = rate;
- return old_rate;
- }
- static int sandbox_clk_enable(struct clk *clk)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
- if (!priv->probed)
- return -ENODEV;
- if (clk->id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- priv->enabled[clk->id] = true;
- return 0;
- }
- static int sandbox_clk_disable(struct clk *clk)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
- if (!priv->probed)
- return -ENODEV;
- if (clk->id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- priv->enabled[clk->id] = false;
- return 0;
- }
- static int sandbox_clk_request(struct clk *clk)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
- if (clk->id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- priv->requested[clk->id] = true;
- return 0;
- }
- static int sandbox_clk_free(struct clk *clk)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
- if (clk->id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- priv->requested[clk->id] = false;
- return 0;
- }
- static struct clk_ops sandbox_clk_ops = {
- .round_rate = sandbox_clk_round_rate,
- .get_rate = sandbox_clk_get_rate,
- .set_rate = sandbox_clk_set_rate,
- .enable = sandbox_clk_enable,
- .disable = sandbox_clk_disable,
- .request = sandbox_clk_request,
- .rfree = sandbox_clk_free,
- };
- static int sandbox_clk_probe(struct udevice *dev)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(dev);
- priv->probed = true;
- return 0;
- }
- static const struct udevice_id sandbox_clk_ids[] = {
- { .compatible = "sandbox,clk" },
- { }
- };
- U_BOOT_DRIVER(sandbox_clk) = {
- .name = "sandbox_clk",
- .id = UCLASS_CLK,
- .of_match = sandbox_clk_ids,
- .ops = &sandbox_clk_ops,
- .probe = sandbox_clk_probe,
- .priv_auto = sizeof(struct sandbox_clk_priv),
- };
- ulong sandbox_clk_query_rate(struct udevice *dev, int id)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(dev);
- if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- return priv->rate[id];
- }
- int sandbox_clk_query_enable(struct udevice *dev, int id)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(dev);
- if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- return priv->enabled[id];
- }
- int sandbox_clk_query_requested(struct udevice *dev, int id)
- {
- struct sandbox_clk_priv *priv = dev_get_priv(dev);
- if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
- return -EINVAL;
- return priv->requested[id];
- }
- int clk_fixed_rate_of_to_plat(struct udevice *dev)
- {
- struct clk_fixed_rate *cplat;
- #if CONFIG_IS_ENABLED(OF_PLATDATA)
- struct sandbox_clk_fixed_rate_plat *plat = dev_get_plat(dev);
- cplat = &plat->fixed;
- cplat->fixed_rate = plat->dtplat.clock_frequency;
- #else
- cplat = to_clk_fixed_rate(dev);
- #endif
- clk_fixed_rate_ofdata_to_plat_(dev, cplat);
- return 0;
- }
- static const struct udevice_id sandbox_clk_fixed_rate_match[] = {
- { .compatible = "sandbox,fixed-clock" },
- { /* sentinel */ }
- };
- U_BOOT_DRIVER(sandbox_fixed_clock) = {
- .name = "sandbox_fixed_clock",
- .id = UCLASS_CLK,
- .of_match = sandbox_clk_fixed_rate_match,
- .of_to_plat = clk_fixed_rate_of_to_plat,
- .plat_auto = sizeof(struct sandbox_clk_fixed_rate_plat),
- .ops = &clk_fixed_rate_ops,
- .flags = DM_FLAG_PRE_RELOC,
- };
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