From: Rosen Penev <rosenp@gmail.com>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Stephen Boyd <sboyd@kernel.org>,
Brian Masney <bmasney+clk@redhat.com>,
Jerome Brunet <jbrunet+clk@baylibre.com>,
Alban Bedel <albeu@free.fr>,
Antony Pavlov <antonynpavlov@gmail.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org,
linux-clk@vger.kernel.org, devicetree@vger.kernel.org
Subject: [PATCH v2 6/6] MIPS: ath79: remove the old clock code
Date: Mon, 9 Nov 2026 17:36:46 -0800 [thread overview]
Message-ID: <20261110013646.1582970-7-rosenp@gmail.com> (raw)
In-Reply-To: <20261110013646.1582970-1-rosenp@gmail.com>
The clk-ath79 driver in drivers/clk has replaced arch/mips/ath79/clock.c,
which is no longer built. Remove it.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
arch/mips/ath79/Makefile | 3 -
arch/mips/ath79/clock.c | 626 ---------------------------------------
2 files changed, 629 deletions(-)
delete mode 100644 arch/mips/ath79/clock.c
diff --git a/arch/mips/ath79/Makefile b/arch/mips/ath79/Makefile
index b78ffdc9b389..5df55b5e1c15 100644
--- a/arch/mips/ath79/Makefile
+++ b/arch/mips/ath79/Makefile
@@ -8,7 +8,4 @@
obj-y := prom.o setup.o common.o
-# replaced by the clk-ath79 driver
-obj-$(if $(CONFIG_COMMON_CLK_ATH79),,y) += clock.o
-
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c
deleted file mode 100644
index 85f747cf37a8..000000000000
--- a/arch/mips/ath79/clock.c
+++ /dev/null
@@ -1,626 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Atheros AR71XX/AR724X/AR913X common routines
- *
- * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
- * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
- *
- * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/clkdev.h>
-#include <linux/clk-provider.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <dt-bindings/clock/ath79-clk.h>
-
-#include <asm/div64.h>
-
-#include <asm/mach-ath79/ath79.h>
-#include <asm/mach-ath79/ar71xx_regs.h>
-#include "common.h"
-
-static struct clk *clks[ATH79_CLK_END];
-static struct clk_onecell_data clk_data = {
- .clks = clks,
- .clk_num = ARRAY_SIZE(clks),
-};
-
-static const char * const clk_names[ATH79_CLK_END] = {
- [ATH79_CLK_CPU] = "cpu",
- [ATH79_CLK_DDR] = "ddr",
- [ATH79_CLK_AHB] = "ahb",
- [ATH79_CLK_REF] = "ref",
- [ATH79_CLK_MDIO] = "mdio",
-};
-
-static const char * __init ath79_clk_name(int type)
-{
- BUG_ON(type >= ARRAY_SIZE(clk_names) || !clk_names[type]);
- return clk_names[type];
-}
-
-static void __init __ath79_set_clk(int type, const char *name, struct clk *clk)
-{
- if (IS_ERR(clk))
- panic("failed to allocate %s clock structure", clk_names[type]);
-
- clks[type] = clk;
- clk_register_clkdev(clk, name, NULL);
-}
-
-static struct clk * __init ath79_set_clk(int type, unsigned long rate)
-{
- const char *name = ath79_clk_name(type);
- struct clk *clk;
-
- clk = clk_register_fixed_rate(NULL, name, NULL, 0, rate);
- __ath79_set_clk(type, name, clk);
- return clk;
-}
-
-static struct clk * __init ath79_set_ff_clk(int type, const char *parent,
- unsigned int mult, unsigned int div)
-{
- const char *name = ath79_clk_name(type);
- struct clk *clk;
-
- clk = clk_register_fixed_factor(NULL, name, parent, 0, mult, div);
- __ath79_set_clk(type, name, clk);
- return clk;
-}
-
-static unsigned long __init ath79_get_ref_rate(void)
-{
- if (!clks[ATH79_CLK_REF])
- panic("ath79: no reference clock");
-
- return clk_get_rate(clks[ATH79_CLK_REF]);
-}
-
-static void __init ar71xx_clocks_init(void __iomem *pll_base)
-{
- unsigned long ref_rate;
- unsigned long cpu_rate;
- unsigned long ddr_rate;
- unsigned long ahb_rate;
- u32 pll;
- u32 freq;
- u32 div;
-
- ref_rate = ath79_get_ref_rate();
-
- pll = __raw_readl(pll_base + AR71XX_PLL_REG_CPU_CONFIG);
-
- div = ((pll >> AR71XX_PLL_FB_SHIFT) & AR71XX_PLL_FB_MASK) + 1;
- freq = div * ref_rate;
-
- div = ((pll >> AR71XX_CPU_DIV_SHIFT) & AR71XX_CPU_DIV_MASK) + 1;
- cpu_rate = freq / div;
-
- div = ((pll >> AR71XX_DDR_DIV_SHIFT) & AR71XX_DDR_DIV_MASK) + 1;
- ddr_rate = freq / div;
-
- div = (((pll >> AR71XX_AHB_DIV_SHIFT) & AR71XX_AHB_DIV_MASK) + 1) * 2;
- ahb_rate = cpu_rate / div;
-
- ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
- ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
- ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
-}
-
-static void __init ar724x_clocks_init(void __iomem *pll_base)
-{
- u32 mult, div, ddr_div, ahb_div;
- u32 pll;
-
- ath79_get_ref_rate();
-
- pll = __raw_readl(pll_base + AR724X_PLL_REG_CPU_CONFIG);
-
- mult = ((pll >> AR724X_PLL_FB_SHIFT) & AR724X_PLL_FB_MASK);
- div = ((pll >> AR724X_PLL_REF_DIV_SHIFT) & AR724X_PLL_REF_DIV_MASK) * 2;
-
- ddr_div = ((pll >> AR724X_DDR_DIV_SHIFT) & AR724X_DDR_DIV_MASK) + 1;
- ahb_div = (((pll >> AR724X_AHB_DIV_SHIFT) & AR724X_AHB_DIV_MASK) + 1) * 2;
-
- ath79_set_ff_clk(ATH79_CLK_CPU, "ref", mult, div);
- ath79_set_ff_clk(ATH79_CLK_DDR, "ref", mult, div * ddr_div);
- ath79_set_ff_clk(ATH79_CLK_AHB, "ref", mult, div * ahb_div);
-}
-
-static void __init ar933x_clocks_init(void __iomem *pll_base)
-{
- u32 clock_ctrl;
- u32 ref_div;
- u32 ninit_mul;
- u32 out_div;
-
- u32 cpu_div;
- u32 ddr_div;
- u32 ahb_div;
-
- ath79_get_ref_rate();
-
- clock_ctrl = __raw_readl(pll_base + AR933X_PLL_CLOCK_CTRL_REG);
- if (clock_ctrl & AR933X_PLL_CLOCK_CTRL_BYPASS) {
- ref_div = 1;
- ninit_mul = 1;
- out_div = 1;
-
- cpu_div = 1;
- ddr_div = 1;
- ahb_div = 1;
- } else {
- u32 cpu_config;
- u32 t;
-
- cpu_config = __raw_readl(pll_base + AR933X_PLL_CPU_CONFIG_REG);
-
- t = (cpu_config >> AR933X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
- AR933X_PLL_CPU_CONFIG_REFDIV_MASK;
- ref_div = t;
-
- ninit_mul = (cpu_config >> AR933X_PLL_CPU_CONFIG_NINT_SHIFT) &
- AR933X_PLL_CPU_CONFIG_NINT_MASK;
-
- t = (cpu_config >> AR933X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
- AR933X_PLL_CPU_CONFIG_OUTDIV_MASK;
- if (t == 0)
- t = 1;
-
- out_div = (1 << t);
-
- cpu_div = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_CPU_DIV_SHIFT) &
- AR933X_PLL_CLOCK_CTRL_CPU_DIV_MASK) + 1;
-
- ddr_div = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_DDR_DIV_SHIFT) &
- AR933X_PLL_CLOCK_CTRL_DDR_DIV_MASK) + 1;
-
- ahb_div = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_AHB_DIV_SHIFT) &
- AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK) + 1;
- }
-
- ath79_set_ff_clk(ATH79_CLK_CPU, "ref", ninit_mul,
- ref_div * out_div * cpu_div);
- ath79_set_ff_clk(ATH79_CLK_DDR, "ref", ninit_mul,
- ref_div * out_div * ddr_div);
- ath79_set_ff_clk(ATH79_CLK_AHB, "ref", ninit_mul,
- ref_div * out_div * ahb_div);
-}
-
-static u32 __init ar934x_get_pll_freq(u32 ref, u32 ref_div, u32 nint, u32 nfrac,
- u32 frac, u32 out_div)
-{
- u64 t;
- u32 ret;
-
- t = ref;
- t *= nint;
- do_div(t, ref_div);
- ret = t;
-
- t = ref;
- t *= nfrac;
- do_div(t, ref_div * frac);
- ret += t;
-
- ret /= (1 << out_div);
- return ret;
-}
-
-static void __init ar934x_clocks_init(void __iomem *pll_base)
-{
- unsigned long ref_rate;
- unsigned long cpu_rate;
- unsigned long ddr_rate;
- unsigned long ahb_rate;
- u32 pll, out_div, ref_div, nint, nfrac, frac, clk_ctrl, postdiv;
- u32 cpu_pll, ddr_pll;
- void __iomem *dpll_base;
-
- dpll_base = ioremap(AR934X_SRIF_BASE, AR934X_SRIF_SIZE);
-
- ref_rate = ath79_get_ref_rate();
-
- pll = __raw_readl(dpll_base + AR934X_SRIF_CPU_DPLL2_REG);
- if (pll & AR934X_SRIF_DPLL2_LOCAL_PLL) {
- out_div = (pll >> AR934X_SRIF_DPLL2_OUTDIV_SHIFT) &
- AR934X_SRIF_DPLL2_OUTDIV_MASK;
- pll = __raw_readl(dpll_base + AR934X_SRIF_CPU_DPLL1_REG);
- nint = (pll >> AR934X_SRIF_DPLL1_NINT_SHIFT) &
- AR934X_SRIF_DPLL1_NINT_MASK;
- nfrac = pll & AR934X_SRIF_DPLL1_NFRAC_MASK;
- ref_div = (pll >> AR934X_SRIF_DPLL1_REFDIV_SHIFT) &
- AR934X_SRIF_DPLL1_REFDIV_MASK;
- frac = 1 << 18;
- } else {
- pll = __raw_readl(pll_base + AR934X_PLL_CPU_CONFIG_REG);
- out_div = (pll >> AR934X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
- AR934X_PLL_CPU_CONFIG_OUTDIV_MASK;
- ref_div = (pll >> AR934X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
- AR934X_PLL_CPU_CONFIG_REFDIV_MASK;
- nint = (pll >> AR934X_PLL_CPU_CONFIG_NINT_SHIFT) &
- AR934X_PLL_CPU_CONFIG_NINT_MASK;
- nfrac = (pll >> AR934X_PLL_CPU_CONFIG_NFRAC_SHIFT) &
- AR934X_PLL_CPU_CONFIG_NFRAC_MASK;
- frac = 1 << 6;
- }
-
- cpu_pll = ar934x_get_pll_freq(ref_rate, ref_div, nint,
- nfrac, frac, out_div);
-
- pll = __raw_readl(dpll_base + AR934X_SRIF_DDR_DPLL2_REG);
- if (pll & AR934X_SRIF_DPLL2_LOCAL_PLL) {
- out_div = (pll >> AR934X_SRIF_DPLL2_OUTDIV_SHIFT) &
- AR934X_SRIF_DPLL2_OUTDIV_MASK;
- pll = __raw_readl(dpll_base + AR934X_SRIF_DDR_DPLL1_REG);
- nint = (pll >> AR934X_SRIF_DPLL1_NINT_SHIFT) &
- AR934X_SRIF_DPLL1_NINT_MASK;
- nfrac = pll & AR934X_SRIF_DPLL1_NFRAC_MASK;
- ref_div = (pll >> AR934X_SRIF_DPLL1_REFDIV_SHIFT) &
- AR934X_SRIF_DPLL1_REFDIV_MASK;
- frac = 1 << 18;
- } else {
- pll = __raw_readl(pll_base + AR934X_PLL_DDR_CONFIG_REG);
- out_div = (pll >> AR934X_PLL_DDR_CONFIG_OUTDIV_SHIFT) &
- AR934X_PLL_DDR_CONFIG_OUTDIV_MASK;
- ref_div = (pll >> AR934X_PLL_DDR_CONFIG_REFDIV_SHIFT) &
- AR934X_PLL_DDR_CONFIG_REFDIV_MASK;
- nint = (pll >> AR934X_PLL_DDR_CONFIG_NINT_SHIFT) &
- AR934X_PLL_DDR_CONFIG_NINT_MASK;
- nfrac = (pll >> AR934X_PLL_DDR_CONFIG_NFRAC_SHIFT) &
- AR934X_PLL_DDR_CONFIG_NFRAC_MASK;
- frac = 1 << 10;
- }
-
- ddr_pll = ar934x_get_pll_freq(ref_rate, ref_div, nint,
- nfrac, frac, out_div);
-
- clk_ctrl = __raw_readl(pll_base + AR934X_PLL_CPU_DDR_CLK_CTRL_REG);
-
- postdiv = (clk_ctrl >> AR934X_PLL_CPU_DDR_CLK_CTRL_CPU_POST_DIV_SHIFT) &
- AR934X_PLL_CPU_DDR_CLK_CTRL_CPU_POST_DIV_MASK;
-
- if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_CPU_PLL_BYPASS)
- cpu_rate = ref_rate;
- else if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_CPUCLK_FROM_CPUPLL)
- cpu_rate = cpu_pll / (postdiv + 1);
- else
- cpu_rate = ddr_pll / (postdiv + 1);
-
- postdiv = (clk_ctrl >> AR934X_PLL_CPU_DDR_CLK_CTRL_DDR_POST_DIV_SHIFT) &
- AR934X_PLL_CPU_DDR_CLK_CTRL_DDR_POST_DIV_MASK;
-
- if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_DDR_PLL_BYPASS)
- ddr_rate = ref_rate;
- else if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_DDRCLK_FROM_DDRPLL)
- ddr_rate = ddr_pll / (postdiv + 1);
- else
- ddr_rate = cpu_pll / (postdiv + 1);
-
- postdiv = (clk_ctrl >> AR934X_PLL_CPU_DDR_CLK_CTRL_AHB_POST_DIV_SHIFT) &
- AR934X_PLL_CPU_DDR_CLK_CTRL_AHB_POST_DIV_MASK;
-
- if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_AHB_PLL_BYPASS)
- ahb_rate = ref_rate;
- else if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL)
- ahb_rate = ddr_pll / (postdiv + 1);
- else
- ahb_rate = cpu_pll / (postdiv + 1);
-
- ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
- ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
- ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
-
- clk_ctrl = __raw_readl(pll_base + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
- if (clk_ctrl & AR934X_PLL_SWITCH_CLOCK_CONTROL_MDIO_CLK_SEL)
- ath79_set_clk(ATH79_CLK_MDIO, 100 * 1000 * 1000);
-
- iounmap(dpll_base);
-}
-
-static void __init qca953x_clocks_init(void __iomem *pll_base)
-{
- unsigned long ref_rate;
- unsigned long cpu_rate;
- unsigned long ddr_rate;
- unsigned long ahb_rate;
- u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv;
- u32 cpu_pll, ddr_pll;
-
- ref_rate = ath79_get_ref_rate();
-
- pll = __raw_readl(pll_base + QCA953X_PLL_CPU_CONFIG_REG);
- out_div = (pll >> QCA953X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
- QCA953X_PLL_CPU_CONFIG_OUTDIV_MASK;
- ref_div = (pll >> QCA953X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
- QCA953X_PLL_CPU_CONFIG_REFDIV_MASK;
- nint = (pll >> QCA953X_PLL_CPU_CONFIG_NINT_SHIFT) &
- QCA953X_PLL_CPU_CONFIG_NINT_MASK;
- frac = (pll >> QCA953X_PLL_CPU_CONFIG_NFRAC_SHIFT) &
- QCA953X_PLL_CPU_CONFIG_NFRAC_MASK;
-
- cpu_pll = nint * ref_rate / ref_div;
- cpu_pll += frac * (ref_rate >> 6) / ref_div;
- cpu_pll /= (1 << out_div);
-
- pll = __raw_readl(pll_base + QCA953X_PLL_DDR_CONFIG_REG);
- out_div = (pll >> QCA953X_PLL_DDR_CONFIG_OUTDIV_SHIFT) &
- QCA953X_PLL_DDR_CONFIG_OUTDIV_MASK;
- ref_div = (pll >> QCA953X_PLL_DDR_CONFIG_REFDIV_SHIFT) &
- QCA953X_PLL_DDR_CONFIG_REFDIV_MASK;
- nint = (pll >> QCA953X_PLL_DDR_CONFIG_NINT_SHIFT) &
- QCA953X_PLL_DDR_CONFIG_NINT_MASK;
- frac = (pll >> QCA953X_PLL_DDR_CONFIG_NFRAC_SHIFT) &
- QCA953X_PLL_DDR_CONFIG_NFRAC_MASK;
-
- ddr_pll = nint * ref_rate / ref_div;
- ddr_pll += frac * (ref_rate >> 6) / (ref_div << 4);
- ddr_pll /= (1 << out_div);
-
- clk_ctrl = __raw_readl(pll_base + QCA953X_PLL_CLK_CTRL_REG);
-
- postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) &
- QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_MASK;
-
- if (clk_ctrl & QCA953X_PLL_CLK_CTRL_CPU_PLL_BYPASS)
- cpu_rate = ref_rate;
- else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL)
- cpu_rate = cpu_pll / (postdiv + 1);
- else
- cpu_rate = ddr_pll / (postdiv + 1);
-
- postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) &
- QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_MASK;
-
- if (clk_ctrl & QCA953X_PLL_CLK_CTRL_DDR_PLL_BYPASS)
- ddr_rate = ref_rate;
- else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL)
- ddr_rate = ddr_pll / (postdiv + 1);
- else
- ddr_rate = cpu_pll / (postdiv + 1);
-
- postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) &
- QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_MASK;
-
- if (clk_ctrl & QCA953X_PLL_CLK_CTRL_AHB_PLL_BYPASS)
- ahb_rate = ref_rate;
- else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL)
- ahb_rate = ddr_pll / (postdiv + 1);
- else
- ahb_rate = cpu_pll / (postdiv + 1);
-
- ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
- ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
- ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
-}
-
-static void __init qca955x_clocks_init(void __iomem *pll_base)
-{
- unsigned long ref_rate;
- unsigned long cpu_rate;
- unsigned long ddr_rate;
- unsigned long ahb_rate;
- u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv;
- u32 cpu_pll, ddr_pll;
-
- ref_rate = ath79_get_ref_rate();
-
- pll = __raw_readl(pll_base + QCA955X_PLL_CPU_CONFIG_REG);
- out_div = (pll >> QCA955X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
- QCA955X_PLL_CPU_CONFIG_OUTDIV_MASK;
- ref_div = (pll >> QCA955X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
- QCA955X_PLL_CPU_CONFIG_REFDIV_MASK;
- nint = (pll >> QCA955X_PLL_CPU_CONFIG_NINT_SHIFT) &
- QCA955X_PLL_CPU_CONFIG_NINT_MASK;
- frac = (pll >> QCA955X_PLL_CPU_CONFIG_NFRAC_SHIFT) &
- QCA955X_PLL_CPU_CONFIG_NFRAC_MASK;
-
- cpu_pll = nint * ref_rate / ref_div;
- cpu_pll += frac * ref_rate / (ref_div * (1 << 6));
- cpu_pll /= (1 << out_div);
-
- pll = __raw_readl(pll_base + QCA955X_PLL_DDR_CONFIG_REG);
- out_div = (pll >> QCA955X_PLL_DDR_CONFIG_OUTDIV_SHIFT) &
- QCA955X_PLL_DDR_CONFIG_OUTDIV_MASK;
- ref_div = (pll >> QCA955X_PLL_DDR_CONFIG_REFDIV_SHIFT) &
- QCA955X_PLL_DDR_CONFIG_REFDIV_MASK;
- nint = (pll >> QCA955X_PLL_DDR_CONFIG_NINT_SHIFT) &
- QCA955X_PLL_DDR_CONFIG_NINT_MASK;
- frac = (pll >> QCA955X_PLL_DDR_CONFIG_NFRAC_SHIFT) &
- QCA955X_PLL_DDR_CONFIG_NFRAC_MASK;
-
- ddr_pll = nint * ref_rate / ref_div;
- ddr_pll += frac * ref_rate / (ref_div * (1 << 10));
- ddr_pll /= (1 << out_div);
-
- clk_ctrl = __raw_readl(pll_base + QCA955X_PLL_CLK_CTRL_REG);
-
- postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) &
- QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_MASK;
-
- if (clk_ctrl & QCA955X_PLL_CLK_CTRL_CPU_PLL_BYPASS)
- cpu_rate = ref_rate;
- else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL)
- cpu_rate = ddr_pll / (postdiv + 1);
- else
- cpu_rate = cpu_pll / (postdiv + 1);
-
- postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) &
- QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_MASK;
-
- if (clk_ctrl & QCA955X_PLL_CLK_CTRL_DDR_PLL_BYPASS)
- ddr_rate = ref_rate;
- else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL)
- ddr_rate = cpu_pll / (postdiv + 1);
- else
- ddr_rate = ddr_pll / (postdiv + 1);
-
- postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) &
- QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_MASK;
-
- if (clk_ctrl & QCA955X_PLL_CLK_CTRL_AHB_PLL_BYPASS)
- ahb_rate = ref_rate;
- else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL)
- ahb_rate = ddr_pll / (postdiv + 1);
- else
- ahb_rate = cpu_pll / (postdiv + 1);
-
- ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
- ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
- ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
-}
-
-static void __init qca956x_clocks_init(void __iomem *pll_base)
-{
- unsigned long ref_rate;
- unsigned long cpu_rate;
- unsigned long ddr_rate;
- unsigned long ahb_rate;
- u32 pll, out_div, ref_div, nint, hfrac, lfrac, clk_ctrl, postdiv;
- u32 cpu_pll, ddr_pll;
-
- ref_rate = ath79_get_ref_rate();
-
- pll = __raw_readl(pll_base + QCA956X_PLL_CPU_CONFIG_REG);
- out_div = (pll >> QCA956X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
- QCA956X_PLL_CPU_CONFIG_OUTDIV_MASK;
- ref_div = (pll >> QCA956X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
- QCA956X_PLL_CPU_CONFIG_REFDIV_MASK;
-
- pll = __raw_readl(pll_base + QCA956X_PLL_CPU_CONFIG1_REG);
- nint = (pll >> QCA956X_PLL_CPU_CONFIG1_NINT_SHIFT) &
- QCA956X_PLL_CPU_CONFIG1_NINT_MASK;
- hfrac = (pll >> QCA956X_PLL_CPU_CONFIG1_NFRAC_H_SHIFT) &
- QCA956X_PLL_CPU_CONFIG1_NFRAC_H_MASK;
- lfrac = (pll >> QCA956X_PLL_CPU_CONFIG1_NFRAC_L_SHIFT) &
- QCA956X_PLL_CPU_CONFIG1_NFRAC_L_MASK;
-
- cpu_pll = nint * ref_rate / ref_div;
- cpu_pll += (lfrac * ref_rate) / ((ref_div * 25) << 13);
- cpu_pll += (hfrac >> 13) * ref_rate / ref_div;
- cpu_pll /= (1 << out_div);
-
- pll = __raw_readl(pll_base + QCA956X_PLL_DDR_CONFIG_REG);
- out_div = (pll >> QCA956X_PLL_DDR_CONFIG_OUTDIV_SHIFT) &
- QCA956X_PLL_DDR_CONFIG_OUTDIV_MASK;
- ref_div = (pll >> QCA956X_PLL_DDR_CONFIG_REFDIV_SHIFT) &
- QCA956X_PLL_DDR_CONFIG_REFDIV_MASK;
- pll = __raw_readl(pll_base + QCA956X_PLL_DDR_CONFIG1_REG);
- nint = (pll >> QCA956X_PLL_DDR_CONFIG1_NINT_SHIFT) &
- QCA956X_PLL_DDR_CONFIG1_NINT_MASK;
- hfrac = (pll >> QCA956X_PLL_DDR_CONFIG1_NFRAC_H_SHIFT) &
- QCA956X_PLL_DDR_CONFIG1_NFRAC_H_MASK;
- lfrac = (pll >> QCA956X_PLL_DDR_CONFIG1_NFRAC_L_SHIFT) &
- QCA956X_PLL_DDR_CONFIG1_NFRAC_L_MASK;
-
- ddr_pll = nint * ref_rate / ref_div;
- ddr_pll += (lfrac * ref_rate) / ((ref_div * 25) << 13);
- ddr_pll += (hfrac >> 13) * ref_rate / ref_div;
- ddr_pll /= (1 << out_div);
-
- clk_ctrl = __raw_readl(pll_base + QCA956X_PLL_CLK_CTRL_REG);
-
- postdiv = (clk_ctrl >> QCA956X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) &
- QCA956X_PLL_CLK_CTRL_CPU_POST_DIV_MASK;
-
- if (clk_ctrl & QCA956X_PLL_CLK_CTRL_CPU_PLL_BYPASS)
- cpu_rate = ref_rate;
- else if (clk_ctrl & QCA956X_PLL_CLK_CTRL_CPU_DDRCLK_FROM_CPUPLL)
- cpu_rate = ddr_pll / (postdiv + 1);
- else
- cpu_rate = cpu_pll / (postdiv + 1);
-
- postdiv = (clk_ctrl >> QCA956X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) &
- QCA956X_PLL_CLK_CTRL_DDR_POST_DIV_MASK;
-
- if (clk_ctrl & QCA956X_PLL_CLK_CTRL_DDR_PLL_BYPASS)
- ddr_rate = ref_rate;
- else if (clk_ctrl & QCA956X_PLL_CLK_CTRL_CPU_DDRCLK_FROM_DDRPLL)
- ddr_rate = cpu_pll / (postdiv + 1);
- else
- ddr_rate = ddr_pll / (postdiv + 1);
-
- postdiv = (clk_ctrl >> QCA956X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) &
- QCA956X_PLL_CLK_CTRL_AHB_POST_DIV_MASK;
-
- if (clk_ctrl & QCA956X_PLL_CLK_CTRL_AHB_PLL_BYPASS)
- ahb_rate = ref_rate;
- else if (clk_ctrl & QCA956X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL)
- ahb_rate = ddr_pll / (postdiv + 1);
- else
- ahb_rate = cpu_pll / (postdiv + 1);
-
- ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
- ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
- ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
-}
-
-static void __init ath79_clocks_init_dt(struct device_node *np)
-{
- struct clk *ref_clk;
- void __iomem *pll_base;
-
- /*
- * The board's crystal. Without a rate in the device tree, the arch
- * code registers it from the bootstrap pins.
- */
- ref_clk = of_clk_get(np, 0);
- if (IS_ERR(ref_clk))
- ref_clk = clk_get_sys(NULL, "ref");
- if (!IS_ERR(ref_clk))
- clks[ATH79_CLK_REF] = ref_clk;
-
- pll_base = of_iomap(np, 0);
- if (!pll_base) {
- pr_err("%pOF: can't map pll registers\n", np);
- goto err_clk;
- }
-
- if (of_device_is_compatible(np, "qca,ar7100-pll"))
- ar71xx_clocks_init(pll_base);
- else if (of_device_is_compatible(np, "qca,ar7240-pll") ||
- of_device_is_compatible(np, "qca,ar9130-pll"))
- ar724x_clocks_init(pll_base);
- else if (of_device_is_compatible(np, "qca,ar9330-pll"))
- ar933x_clocks_init(pll_base);
- else if (of_device_is_compatible(np, "qca,ar9340-pll"))
- ar934x_clocks_init(pll_base);
- else if (of_device_is_compatible(np, "qca,qca9530-pll"))
- qca953x_clocks_init(pll_base);
- else if (of_device_is_compatible(np, "qca,qca9550-pll"))
- qca955x_clocks_init(pll_base);
- else if (of_device_is_compatible(np, "qca,qca9560-pll"))
- qca956x_clocks_init(pll_base);
-
- if (!clks[ATH79_CLK_MDIO])
- clks[ATH79_CLK_MDIO] = clks[ATH79_CLK_REF];
-
- if (of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data)) {
- pr_err("%pOF: could not register clk provider\n", np);
- goto err_iounmap;
- }
-
- return;
-
-err_iounmap:
- iounmap(pll_base);
-
-err_clk:
- clk_put(ref_clk);
-}
-
-CLK_OF_DECLARE(ar7100_clk, "qca,ar7100-pll", ath79_clocks_init_dt);
-CLK_OF_DECLARE(ar7240_clk, "qca,ar7240-pll", ath79_clocks_init_dt);
-CLK_OF_DECLARE(ar9130_clk, "qca,ar9130-pll", ath79_clocks_init_dt);
-CLK_OF_DECLARE(ar9330_clk, "qca,ar9330-pll", ath79_clocks_init_dt);
-CLK_OF_DECLARE(ar9340_clk, "qca,ar9340-pll", ath79_clocks_init_dt);
-CLK_OF_DECLARE(ar9530_clk, "qca,qca9530-pll", ath79_clocks_init_dt);
-CLK_OF_DECLARE(ar9550_clk, "qca,qca9550-pll", ath79_clocks_init_dt);
-CLK_OF_DECLARE(ar9560_clk, "qca,qca9560-pll", ath79_clocks_init_dt);
--
2.56.0
prev parent reply other threads:[~2026-11-10 1:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-10 1:36 [PATCH v2 0/6] clk: add a driver for the ath79 PLL controller Rosen Penev
2026-11-10 1:36 ` [PATCH v2 1/6] MIPS: ath79: apply the QCA956x timer workaround in setup Rosen Penev
2026-11-10 1:36 ` [PATCH v2 2/6] MIPS: ath79: move the bootstrap reference clock to setup Rosen Penev
2026-11-10 1:36 ` [PATCH v2 3/6] dt-bindings: clock: ath79: add the UART1 clock Rosen Penev
2026-11-10 1:36 ` [PATCH v2 4/6] dt-bindings: clock: ath79: add the PCIe PLL clock Rosen Penev
2026-11-10 1:36 ` [PATCH v2 5/6] clk: add a driver for the Atheros/Qualcomm ath79 PLL controller Rosen Penev
2026-11-10 1:36 ` Rosen Penev [this message]
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