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https://github.com/brain-hackers/u-boot-brain
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ea45b8f28d
The patch adds support for TI divider clock binding. The driver uses routines provided by the common clock framework (ccf). The code is based on the drivers/clk/ti/divider.c driver of the Linux kernel version 5.9-rc7. For DT binding details see: - Documentation/devicetree/bindings/clock/ti/divider.txt Signed-off-by: Dario Binacchi <dariobin@libero.it>
35 lines
518 B
C
35 lines
518 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* TI clock utilities
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*
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* Copyright (C) 2020 Dario Binacchi <dariobin@libero.it>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include "clk.h"
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static void clk_ti_rmw(u32 val, u32 mask, fdt_addr_t reg)
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{
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u32 v;
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v = readl(reg);
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v &= ~mask;
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v |= val;
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writel(v, reg);
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}
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void clk_ti_latch(fdt_addr_t reg, s8 shift)
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{
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u32 latch;
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if (shift < 0)
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return;
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latch = 1 << shift;
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clk_ti_rmw(latch, latch, reg);
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clk_ti_rmw(0, latch, reg);
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readl(reg); /* OCP barrier */
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}
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