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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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76c9dd9dbd
This modifies the TI Davinci PLL clock driver to allow for the case when dev == NULL. On some (most) SoCs that use this driver, the PLL clock needs to be registered during early boot because it is used for clocksource/clkevent and there will be no platform device available. Signed-off-by: David Lechner <david@lechnology.com> Reviewed-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/20180525181150.17873-7-david@lechnology.com
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* PLL clock descriptions for TI DM355
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*
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* Copyright (C) 2018 David Lechner <david@lechnology.com>
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*/
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#include <linux/bitops.h>
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#include <linux/clk/davinci.h>
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#include <linux/clkdev.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include "pll.h"
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static const struct davinci_pll_clk_info dm355_pll1_info = {
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.name = "pll1",
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.pllm_mask = GENMASK(7, 0),
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.pllm_min = 92,
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.pllm_max = 184,
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.flags = PLL_HAS_CLKMODE | PLL_HAS_PREDIV | PLL_PREDIV_ALWAYS_ENABLED |
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PLL_PREDIV_FIXED8 | PLL_HAS_POSTDIV |
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PLL_POSTDIV_ALWAYS_ENABLED | PLL_POSTDIV_FIXED_DIV,
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};
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SYSCLK(1, pll1_sysclk1, pll1_pllen, 5, SYSCLK_FIXED_DIV | SYSCLK_ALWAYS_ENABLED);
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SYSCLK(2, pll1_sysclk2, pll1_pllen, 5, SYSCLK_FIXED_DIV | SYSCLK_ALWAYS_ENABLED);
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SYSCLK(3, pll1_sysclk3, pll1_pllen, 5, SYSCLK_ALWAYS_ENABLED);
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SYSCLK(4, pll1_sysclk4, pll1_pllen, 5, SYSCLK_ALWAYS_ENABLED);
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int dm355_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip)
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{
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struct clk *clk;
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davinci_pll_clk_register(dev, &dm355_pll1_info, "ref_clk", base, cfgchip);
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clk = davinci_pll_sysclk_register(dev, &pll1_sysclk1, base);
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clk_register_clkdev(clk, "pll1_sysclk1", "dm355-psc");
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clk = davinci_pll_sysclk_register(dev, &pll1_sysclk2, base);
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clk_register_clkdev(clk, "pll1_sysclk2", "dm355-psc");
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clk = davinci_pll_sysclk_register(dev, &pll1_sysclk3, base);
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clk_register_clkdev(clk, "pll1_sysclk3", "dm355-psc");
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clk = davinci_pll_sysclk_register(dev, &pll1_sysclk4, base);
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clk_register_clkdev(clk, "pll1_sysclk4", "dm355-psc");
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clk = davinci_pll_auxclk_register(dev, "pll1_auxclk", base);
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clk_register_clkdev(clk, "pll1_auxclk", "dm355-psc");
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davinci_pll_sysclkbp_clk_register(dev, "pll1_sysclkbp", base);
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return 0;
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}
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static const struct davinci_pll_clk_info dm355_pll2_info = {
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.name = "pll2",
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.pllm_mask = GENMASK(7, 0),
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.pllm_min = 92,
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.pllm_max = 184,
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.flags = PLL_HAS_PREDIV | PLL_PREDIV_ALWAYS_ENABLED | PLL_HAS_POSTDIV |
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PLL_POSTDIV_ALWAYS_ENABLED | PLL_POSTDIV_FIXED_DIV,
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};
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SYSCLK(1, pll2_sysclk1, pll2_pllen, 5, SYSCLK_FIXED_DIV | SYSCLK_ALWAYS_ENABLED);
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int dm355_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip)
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{
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davinci_pll_clk_register(dev, &dm355_pll2_info, "oscin", base, cfgchip);
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davinci_pll_sysclk_register(dev, &pll2_sysclk1, base);
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davinci_pll_sysclkbp_clk_register(dev, "pll2_sysclkbp", base);
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return 0;
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}
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