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https://github.com/brain-hackers/u-boot-brain
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dm: clk: add BCM6345 clock driver
This is a simplified version of linux/arch/mips/bcm63xx/clk.c Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
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@ -20,6 +20,14 @@ config SPL_CLK
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setting up clocks within SPL, and allows the same drivers to be
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used as U-Boot proper.
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config CLK_BCM6345
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bool "Clock controller driver for BCM6345"
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depends on CLK && ARCH_BMIPS
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default y
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help
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This clock driver adds support for enabling and disabling peripheral
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clocks on BCM6345 SoCs. HW has no rate changing capabilities.
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config CLK_BOSTON
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def_bool y if TARGET_BOSTON
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depends on CLK
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@ -17,6 +17,7 @@ obj-y += tegra/
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obj-$(CONFIG_CLK_UNIPHIER) += uniphier/
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obj-$(CONFIG_CLK_EXYNOS) += exynos/
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obj-$(CONFIG_CLK_AT91) += at91/
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obj-$(CONFIG_CLK_BCM6345) += clk_bcm6345.o
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obj-$(CONFIG_CLK_BOSTON) += clk_boston.o
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obj-$(CONFIG_ARCH_ASPEED) += aspeed/
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obj-$(CONFIG_STM32F7) += clk_stm32f7.o
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78
drivers/clk/clk_bcm6345.c
Normal file
78
drivers/clk/clk_bcm6345.c
Normal file
@ -0,0 +1,78 @@
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/*
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* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
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*
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* Derived from linux/arch/mips/bcm63xx/clk.c:
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* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
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*
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* SPDX-License-Identifier: GPL-2.0+
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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 <asm/io.h>
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#define MAX_CLKS 32
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struct bcm6345_clk_priv {
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void __iomem *regs;
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};
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static int bcm6345_clk_enable(struct clk *clk)
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{
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struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
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if (clk->id >= MAX_CLKS)
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return -EINVAL;
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setbits_be32(priv->regs, BIT(clk->id));
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return 0;
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}
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static int bcm6345_clk_disable(struct clk *clk)
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{
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struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
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if (clk->id >= MAX_CLKS)
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return -EINVAL;
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clrbits_be32(priv->regs, BIT(clk->id));
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return 0;
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}
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static struct clk_ops bcm6345_clk_ops = {
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.disable = bcm6345_clk_disable,
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.enable = bcm6345_clk_enable,
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};
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static const struct udevice_id bcm6345_clk_ids[] = {
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{ .compatible = "brcm,bcm6345-clk" },
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{ /* sentinel */ }
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};
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static int bcm63xx_clk_probe(struct udevice *dev)
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{
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struct bcm6345_clk_priv *priv = dev_get_priv(dev);
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fdt_addr_t addr;
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fdt_size_t size;
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addr = dev_get_addr_size_index(dev, 0, &size);
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if (addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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priv->regs = ioremap(addr, size);
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return 0;
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}
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U_BOOT_DRIVER(clk_bcm6345) = {
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.name = "clk_bcm6345",
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.id = UCLASS_CLK,
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.of_match = bcm6345_clk_ids,
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.ops = &bcm6345_clk_ops,
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.probe = bcm63xx_clk_probe,
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.priv_auto_alloc_size = sizeof(struct bcm6345_clk_priv),
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};
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