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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (c) 2016, NVIDIA CORPORATION.
- */
- #include <common.h>
- #include <dm.h>
- #include <clk.h>
- #include <malloc.h>
- #include <asm/clk.h>
- #include <dm/device_compat.h>
- #include <linux/err.h>
- struct sandbox_clk_test {
- struct clk clks[SANDBOX_CLK_TEST_NON_DEVM_COUNT];
- struct clk *clkps[SANDBOX_CLK_TEST_ID_COUNT];
- struct clk_bulk bulk;
- };
- static const char * const sandbox_clk_test_names[] = {
- [SANDBOX_CLK_TEST_ID_FIXED] = "fixed",
- [SANDBOX_CLK_TEST_ID_SPI] = "spi",
- [SANDBOX_CLK_TEST_ID_I2C] = "i2c",
- };
- int sandbox_clk_test_get(struct udevice *dev)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- int i, ret;
- for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++) {
- ret = clk_get_by_name(dev, sandbox_clk_test_names[i],
- &sbct->clks[i]);
- if (ret)
- return ret;
- }
- return 0;
- }
- int sandbox_clk_test_devm_get(struct udevice *dev)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- struct clk *clk;
- clk = devm_clk_get(dev, "no-an-existing-clock");
- if (!IS_ERR(clk)) {
- dev_err(dev, "devm_clk_get() should have failed\n");
- return -EINVAL;
- }
- clk = devm_clk_get(dev, "uart2");
- if (IS_ERR(clk))
- return PTR_ERR(clk);
- sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1] = clk;
- clk = devm_clk_get_optional(dev, "uart1");
- if (IS_ERR(clk))
- return PTR_ERR(clk);
- sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM2] = clk;
- sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM_NULL] = NULL;
- clk = devm_clk_get_optional(dev, "not_an_existing_clock");
- if (IS_ERR(clk))
- return PTR_ERR(clk);
- if (clk)
- return -EINVAL;
- return 0;
- }
- int sandbox_clk_test_get_bulk(struct udevice *dev)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- return clk_get_bulk(dev, &sbct->bulk);
- }
- ulong sandbox_clk_test_get_rate(struct udevice *dev, int id)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
- return -EINVAL;
- return clk_get_rate(sbct->clkps[id]);
- }
- ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
- return -EINVAL;
- return clk_set_rate(sbct->clkps[id], rate);
- }
- int sandbox_clk_test_enable(struct udevice *dev, int id)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
- return -EINVAL;
- return clk_enable(sbct->clkps[id]);
- }
- int sandbox_clk_test_enable_bulk(struct udevice *dev)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- return clk_enable_bulk(&sbct->bulk);
- }
- int sandbox_clk_test_disable(struct udevice *dev, int id)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
- return -EINVAL;
- return clk_disable(sbct->clkps[id]);
- }
- int sandbox_clk_test_disable_bulk(struct udevice *dev)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- return clk_disable_bulk(&sbct->bulk);
- }
- int sandbox_clk_test_free(struct udevice *dev)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- int i, ret;
- devm_clk_put(dev, sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1]);
- for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++) {
- ret = clk_free(&sbct->clks[i]);
- if (ret)
- return ret;
- }
- return 0;
- }
- int sandbox_clk_test_release_bulk(struct udevice *dev)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- return clk_release_bulk(&sbct->bulk);
- }
- int sandbox_clk_test_valid(struct udevice *dev)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- int i;
- for (i = 0; i < SANDBOX_CLK_TEST_ID_COUNT; i++) {
- if (!clk_valid(sbct->clkps[i]))
- if (i != SANDBOX_CLK_TEST_ID_DEVM_NULL)
- return -EINVAL;
- }
- return 0;
- }
- static int sandbox_clk_test_probe(struct udevice *dev)
- {
- struct sandbox_clk_test *sbct = dev_get_priv(dev);
- int i;
- for (i = 0; i < SANDBOX_CLK_TEST_ID_DEVM1; i++)
- sbct->clkps[i] = &sbct->clks[i];
- for (i = SANDBOX_CLK_TEST_ID_DEVM1; i < SANDBOX_CLK_TEST_ID_COUNT; i++)
- sbct->clkps[i] = NULL;
- return 0;
- }
- static const struct udevice_id sandbox_clk_test_ids[] = {
- { .compatible = "sandbox,clk-test" },
- { }
- };
- U_BOOT_DRIVER(sandbox_clk_test) = {
- .name = "sandbox_clk_test",
- .id = UCLASS_MISC,
- .of_match = sandbox_clk_test_ids,
- .probe = sandbox_clk_test_probe,
- .priv_auto_alloc_size = sizeof(struct sandbox_clk_test),
- };
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