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https://github.com/AsahiLinux/u-boot
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d306182439
Assign ccf_clk_ops to .ops of clk_ccf driver so that it can act as an clk provider. Also add "#clock-cells=<1>" to its device tree node. Add "i2c_root" to clk_test in the device tree and driver for testing. Get "i2c_root" clock in CCF unit tests and add tests for it. Signed-off-by: Yang Xiwen <forbidden405@outlook.com> Reviewed-by: Sean Anderson <seanga2@gmail.com> Link: https://lore.kernel.org/r/20231111-enable_count-v3-2-08a821892fa9@outlook.com
195 lines
4.3 KiB
C
195 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016, NVIDIA CORPORATION.
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*/
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#include <common.h>
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#include <dm.h>
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#include <clk.h>
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#include <malloc.h>
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#include <asm/clk.h>
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#include <dm/device_compat.h>
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#include <linux/err.h>
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static const char * const sandbox_clk_test_names[] = {
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[SANDBOX_CLK_TEST_ID_FIXED] = "fixed",
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[SANDBOX_CLK_TEST_ID_SPI] = "spi",
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[SANDBOX_CLK_TEST_ID_I2C] = "i2c",
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[SANDBOX_CLK_TEST_ID_I2C_ROOT] = "i2c_root",
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};
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int sandbox_clk_test_get(struct udevice *dev)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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int i, ret;
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for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++) {
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ret = clk_get_by_name(dev, sandbox_clk_test_names[i],
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&sbct->clks[i]);
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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 sandbox_clk_test_devm_get(struct udevice *dev)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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struct clk *clk;
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clk = devm_clk_get(dev, "no-an-existing-clock");
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if (!IS_ERR(clk)) {
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dev_err(dev, "devm_clk_get() should have failed\n");
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return -EINVAL;
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}
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clk = devm_clk_get(dev, "uart2");
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if (IS_ERR(clk))
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return PTR_ERR(clk);
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sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1] = clk;
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clk = devm_clk_get_optional(dev, "uart1");
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if (IS_ERR(clk))
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return PTR_ERR(clk);
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sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM2] = clk;
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sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM_NULL] = NULL;
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clk = devm_clk_get_optional(dev, "not_an_existing_clock");
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if (IS_ERR(clk))
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return PTR_ERR(clk);
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if (clk)
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return -EINVAL;
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return 0;
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}
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int sandbox_clk_test_get_bulk(struct udevice *dev)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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return clk_get_bulk(dev, &sbct->bulk);
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}
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ulong sandbox_clk_test_get_rate(struct udevice *dev, int id)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
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return -EINVAL;
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return clk_get_rate(sbct->clkps[id]);
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}
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ulong sandbox_clk_test_round_rate(struct udevice *dev, int id, ulong rate)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
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return -EINVAL;
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return clk_round_rate(sbct->clkps[id], rate);
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}
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ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
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return -EINVAL;
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return clk_set_rate(sbct->clkps[id], rate);
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}
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int sandbox_clk_test_enable(struct udevice *dev, int id)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
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return -EINVAL;
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return clk_enable(sbct->clkps[id]);
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}
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int sandbox_clk_test_enable_bulk(struct udevice *dev)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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return clk_enable_bulk(&sbct->bulk);
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}
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int sandbox_clk_test_disable(struct udevice *dev, int id)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
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return -EINVAL;
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return clk_disable(sbct->clkps[id]);
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}
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int sandbox_clk_test_disable_bulk(struct udevice *dev)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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return clk_disable_bulk(&sbct->bulk);
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}
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int sandbox_clk_test_free(struct udevice *dev)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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int i;
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devm_clk_put(dev, sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1]);
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for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++)
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clk_free(&sbct->clks[i]);
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return 0;
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}
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int sandbox_clk_test_release_bulk(struct udevice *dev)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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return clk_release_bulk(&sbct->bulk);
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}
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int sandbox_clk_test_valid(struct udevice *dev)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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int i;
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for (i = 0; i < SANDBOX_CLK_TEST_ID_COUNT; i++) {
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if (!clk_valid(sbct->clkps[i]))
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if (i != SANDBOX_CLK_TEST_ID_DEVM_NULL)
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return -EINVAL;
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}
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return 0;
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}
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static int sandbox_clk_test_probe(struct udevice *dev)
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{
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struct sandbox_clk_test *sbct = dev_get_priv(dev);
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int i;
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for (i = 0; i < SANDBOX_CLK_TEST_ID_DEVM1; i++)
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sbct->clkps[i] = &sbct->clks[i];
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for (i = SANDBOX_CLK_TEST_ID_DEVM1; i < SANDBOX_CLK_TEST_ID_COUNT; i++)
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sbct->clkps[i] = NULL;
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return 0;
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}
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static const struct udevice_id sandbox_clk_test_ids[] = {
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{ .compatible = "sandbox,clk-test" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_clk_test) = {
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.name = "sandbox_clk_test",
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.id = UCLASS_MISC,
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.of_match = sandbox_clk_test_ids,
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.probe = sandbox_clk_test_probe,
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.priv_auto = sizeof(struct sandbox_clk_test),
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};
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