From:   Keguang Zhang <keguang.zhang@gmail.com>
To:     linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
        linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        Keguang Zhang <keguang.zhang@gmail.com>
Subject: [PATCH v4 2/4] clk: loongson1: Remove the outdated driver
Date:   Mon, 20 Mar 2023 18:40:01 +0800
Message-Id: <20230320104003.407844-3-keguang.zhang@gmail.com>
In-Reply-To: <20230320104003.407844-1-keguang.zhang@gmail.com>
References: <20230320104003.407844-1-keguang.zhang@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Remove the outdated driver due to the following aspects.
- no DT support
- duplicate code across LS1B and LS1C
- does not fit into the current clock framework

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
---
V3 -> V4: None
V2 -> V3: None
V1 -> V2: Split the driver removal to a separate patch
---
 drivers/clk/Makefile                   |   1 -
 drivers/clk/loongson1/Makefile         |   4 -
 drivers/clk/loongson1/clk-loongson1b.c | 118 -------------------------
 drivers/clk/loongson1/clk-loongson1c.c |  95 --------------------
 drivers/clk/loongson1/clk.c            |  41 ---------
 drivers/clk/loongson1/clk.h            |  15 ----
 6 files changed, 274 deletions(-)
 delete mode 100644 drivers/clk/loongson1/Makefile
 delete mode 100644 drivers/clk/loongson1/clk-loongson1b.c
 delete mode 100644 drivers/clk/loongson1/clk-loongson1c.c
 delete mode 100644 drivers/clk/loongson1/clk.c
 delete mode 100644 drivers/clk/loongson1/clk.h

diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index e3ca0d058a25..b7b2c6d64636 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -93,7 +93,6 @@ obj-y					+= imx/
 obj-y					+= ingenic/
 obj-$(CONFIG_ARCH_K3)			+= keystone/
 obj-$(CONFIG_ARCH_KEYSTONE)		+= keystone/
-obj-$(CONFIG_MACH_LOONGSON32)		+= loongson1/
 obj-y					+= mediatek/
 obj-$(CONFIG_ARCH_MESON)		+= meson/
 obj-y					+= microchip/
diff --git a/drivers/clk/loongson1/Makefile b/drivers/clk/loongson1/Makefile
deleted file mode 100644
index 251d0fe9dcd1..000000000000
--- a/drivers/clk/loongson1/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-obj-y				+= clk.o
-obj-$(CONFIG_LOONGSON1_LS1B)	+= clk-loongson1b.o
-obj-$(CONFIG_LOONGSON1_LS1C)	+= clk-loongson1c.o
diff --git a/drivers/clk/loongson1/clk-loongson1b.c b/drivers/clk/loongson1/clk-loongson1b.c
deleted file mode 100644
index 13a2ca23a159..000000000000
--- a/drivers/clk/loongson1/clk-loongson1b.c
+++ /dev/null
@@ -1,118 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (c) 2012-2016 Zhang, Keguang <keguang.zhang@gmail.com>
- */
-
-#include <linux/clkdev.h>
-#include <linux/clk-provider.h>
-#include <linux/io.h>
-#include <linux/err.h>
-
-#include <loongson1.h>
-#include "clk.h"
-
-#define OSC		(33 * 1000000)
-#define DIV_APB		2
-
-static DEFINE_SPINLOCK(_lock);
-
-static unsigned long ls1x_pll_recalc_rate(struct clk_hw *hw,
-					  unsigned long parent_rate)
-{
-	u32 pll, rate;
-
-	pll = __raw_readl(LS1X_CLK_PLL_FREQ);
-	rate = 12 + (pll & GENMASK(5, 0));
-	rate *= OSC;
-	rate >>= 1;
-
-	return rate;
-}
-
-static const struct clk_ops ls1x_pll_clk_ops = {
-	.recalc_rate = ls1x_pll_recalc_rate,
-};
-
-static const char *const cpu_parents[] = { "cpu_clk_div", "osc_clk", };
-static const char *const ahb_parents[] = { "ahb_clk_div", "osc_clk", };
-static const char *const dc_parents[] = { "dc_clk_div", "osc_clk", };
-
-void __init ls1x_clk_init(void)
-{
-	struct clk_hw *hw;
-
-	hw = clk_hw_register_fixed_rate(NULL, "osc_clk", NULL, 0, OSC);
-	clk_hw_register_clkdev(hw, "osc_clk", NULL);
-
-	/* clock derived from 33 MHz OSC clk */
-	hw = clk_hw_register_pll(NULL, "pll_clk", "osc_clk",
-				 &ls1x_pll_clk_ops, 0);
-	clk_hw_register_clkdev(hw, "pll_clk", NULL);
-
-	/* clock derived from PLL clk */
-	/*                                 _____
-	 *         _______________________|     |
-	 * OSC ___/                       | MUX |___ CPU CLK
-	 *        \___ PLL ___ CPU DIV ___|     |
-	 *                                |_____|
-	 */
-	hw = clk_hw_register_divider(NULL, "cpu_clk_div", "pll_clk",
-				   CLK_GET_RATE_NOCACHE, LS1X_CLK_PLL_DIV,
-				   DIV_CPU_SHIFT, DIV_CPU_WIDTH,
-				   CLK_DIVIDER_ONE_BASED |
-				   CLK_DIVIDER_ROUND_CLOSEST, &_lock);
-	clk_hw_register_clkdev(hw, "cpu_clk_div", NULL);
-	hw = clk_hw_register_mux(NULL, "cpu_clk", cpu_parents,
-			       ARRAY_SIZE(cpu_parents),
-			       CLK_SET_RATE_NO_REPARENT, LS1X_CLK_PLL_DIV,
-			       BYPASS_CPU_SHIFT, BYPASS_CPU_WIDTH, 0, &_lock);
-	clk_hw_register_clkdev(hw, "cpu_clk", NULL);
-
-	/*                                 _____
-	 *         _______________________|     |
-	 * OSC ___/                       | MUX |___ DC  CLK
-	 *        \___ PLL ___ DC  DIV ___|     |
-	 *                                |_____|
-	 */
-	hw = clk_hw_register_divider(NULL, "dc_clk_div", "pll_clk",
-				   0, LS1X_CLK_PLL_DIV, DIV_DC_SHIFT,
-				   DIV_DC_WIDTH, CLK_DIVIDER_ONE_BASED, &_lock);
-	clk_hw_register_clkdev(hw, "dc_clk_div", NULL);
-	hw = clk_hw_register_mux(NULL, "dc_clk", dc_parents,
-			       ARRAY_SIZE(dc_parents),
-			       CLK_SET_RATE_NO_REPARENT, LS1X_CLK_PLL_DIV,
-			       BYPASS_DC_SHIFT, BYPASS_DC_WIDTH, 0, &_lock);
-	clk_hw_register_clkdev(hw, "dc_clk", NULL);
-
-	/*                                 _____
-	 *         _______________________|     |
-	 * OSC ___/                       | MUX |___ DDR CLK
-	 *        \___ PLL ___ DDR DIV ___|     |
-	 *                                |_____|
-	 */
-	hw = clk_hw_register_divider(NULL, "ahb_clk_div", "pll_clk",
-				   0, LS1X_CLK_PLL_DIV, DIV_DDR_SHIFT,
-				   DIV_DDR_WIDTH, CLK_DIVIDER_ONE_BASED,
-				   &_lock);
-	clk_hw_register_clkdev(hw, "ahb_clk_div", NULL);
-	hw = clk_hw_register_mux(NULL, "ahb_clk", ahb_parents,
-			       ARRAY_SIZE(ahb_parents),
-			       CLK_SET_RATE_NO_REPARENT, LS1X_CLK_PLL_DIV,
-			       BYPASS_DDR_SHIFT, BYPASS_DDR_WIDTH, 0, &_lock);
-	clk_hw_register_clkdev(hw, "ahb_clk", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-dma", NULL);
-	clk_hw_register_clkdev(hw, "stmmaceth", NULL);
-
-	/* clock derived from AHB clk */
-	/* APB clk is always half of the AHB clk */
-	hw = clk_hw_register_fixed_factor(NULL, "apb_clk", "ahb_clk", 0, 1,
-					DIV_APB);
-	clk_hw_register_clkdev(hw, "apb_clk", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-ac97", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-i2c", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-nand", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-pwmtimer", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-spi", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-wdt", NULL);
-	clk_hw_register_clkdev(hw, "serial8250", NULL);
-}
diff --git a/drivers/clk/loongson1/clk-loongson1c.c b/drivers/clk/loongson1/clk-loongson1c.c
deleted file mode 100644
index 1ebf740380ef..000000000000
--- a/drivers/clk/loongson1/clk-loongson1c.c
+++ /dev/null
@@ -1,95 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (c) 2016 Yang Ling <gnaygnil@gmail.com>
- */
-
-#include <linux/clkdev.h>
-#include <linux/clk-provider.h>
-#include <linux/io.h>
-
-#include <loongson1.h>
-#include "clk.h"
-
-#define OSC		(24 * 1000000)
-#define DIV_APB		1
-
-static DEFINE_SPINLOCK(_lock);
-
-static unsigned long ls1x_pll_recalc_rate(struct clk_hw *hw,
-					  unsigned long parent_rate)
-{
-	u32 pll, rate;
-
-	pll = __raw_readl(LS1X_CLK_PLL_FREQ);
-	rate = ((pll >> 8) & 0xff) + ((pll >> 16) & 0xff);
-	rate *= OSC;
-	rate >>= 2;
-
-	return rate;
-}
-
-static const struct clk_ops ls1x_pll_clk_ops = {
-	.recalc_rate = ls1x_pll_recalc_rate,
-};
-
-static const struct clk_div_table ahb_div_table[] = {
-	[0] = { .val = 0, .div = 2 },
-	[1] = { .val = 1, .div = 4 },
-	[2] = { .val = 2, .div = 3 },
-	[3] = { .val = 3, .div = 3 },
-	[4] = { /* sentinel */ }
-};
-
-void __init ls1x_clk_init(void)
-{
-	struct clk_hw *hw;
-
-	hw = clk_hw_register_fixed_rate(NULL, "osc_clk", NULL, 0, OSC);
-	clk_hw_register_clkdev(hw, "osc_clk", NULL);
-
-	/* clock derived from 24 MHz OSC clk */
-	hw = clk_hw_register_pll(NULL, "pll_clk", "osc_clk",
-				&ls1x_pll_clk_ops, 0);
-	clk_hw_register_clkdev(hw, "pll_clk", NULL);
-
-	hw = clk_hw_register_divider(NULL, "cpu_clk_div", "pll_clk",
-				   CLK_GET_RATE_NOCACHE, LS1X_CLK_PLL_DIV,
-				   DIV_CPU_SHIFT, DIV_CPU_WIDTH,
-				   CLK_DIVIDER_ONE_BASED |
-				   CLK_DIVIDER_ROUND_CLOSEST, &_lock);
-	clk_hw_register_clkdev(hw, "cpu_clk_div", NULL);
-	hw = clk_hw_register_fixed_factor(NULL, "cpu_clk", "cpu_clk_div",
-					0, 1, 1);
-	clk_hw_register_clkdev(hw, "cpu_clk", NULL);
-
-	hw = clk_hw_register_divider(NULL, "dc_clk_div", "pll_clk",
-				   0, LS1X_CLK_PLL_DIV, DIV_DC_SHIFT,
-				   DIV_DC_WIDTH, CLK_DIVIDER_ONE_BASED, &_lock);
-	clk_hw_register_clkdev(hw, "dc_clk_div", NULL);
-	hw = clk_hw_register_fixed_factor(NULL, "dc_clk", "dc_clk_div",
-					0, 1, 1);
-	clk_hw_register_clkdev(hw, "dc_clk", NULL);
-
-	hw = clk_hw_register_divider_table(NULL, "ahb_clk_div", "cpu_clk_div",
-				0, LS1X_CLK_PLL_FREQ, DIV_DDR_SHIFT,
-				DIV_DDR_WIDTH, CLK_DIVIDER_ALLOW_ZERO,
-				ahb_div_table, &_lock);
-	clk_hw_register_clkdev(hw, "ahb_clk_div", NULL);
-	hw = clk_hw_register_fixed_factor(NULL, "ahb_clk", "ahb_clk_div",
-					0, 1, 1);
-	clk_hw_register_clkdev(hw, "ahb_clk", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-dma", NULL);
-	clk_hw_register_clkdev(hw, "stmmaceth", NULL);
-
-	/* clock derived from AHB clk */
-	hw = clk_hw_register_fixed_factor(NULL, "apb_clk", "ahb_clk", 0, 1,
-					DIV_APB);
-	clk_hw_register_clkdev(hw, "apb_clk", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-ac97", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-i2c", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-nand", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-pwmtimer", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-spi", NULL);
-	clk_hw_register_clkdev(hw, "ls1x-wdt", NULL);
-	clk_hw_register_clkdev(hw, "serial8250", NULL);
-}
diff --git a/drivers/clk/loongson1/clk.c b/drivers/clk/loongson1/clk.c
deleted file mode 100644
index f336a3126d31..000000000000
--- a/drivers/clk/loongson1/clk.c
+++ /dev/null
@@ -1,41 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (c) 2012-2016 Zhang, Keguang <keguang.zhang@gmail.com>
- */
-
-#include <linux/clk-provider.h>
-#include <linux/slab.h>
-
-#include "clk.h"
-
-struct clk_hw *__init clk_hw_register_pll(struct device *dev,
-					  const char *name,
-					  const char *parent_name,
-					  const struct clk_ops *ops,
-					  unsigned long flags)
-{
-	int ret;
-	struct clk_hw *hw;
-	struct clk_init_data init;
-
-	/* allocate the divider */
-	hw = kzalloc(sizeof(*hw), GFP_KERNEL);
-	if (!hw)
-		return ERR_PTR(-ENOMEM);
-
-	init.name = name;
-	init.ops = ops;
-	init.flags = flags;
-	init.parent_names = parent_name ? &parent_name : NULL;
-	init.num_parents = parent_name ? 1 : 0;
-	hw->init = &init;
-
-	/* register the clock */
-	ret = clk_hw_register(dev, hw);
-	if (ret) {
-		kfree(hw);
-		hw = ERR_PTR(ret);
-	}
-
-	return hw;
-}
diff --git a/drivers/clk/loongson1/clk.h b/drivers/clk/loongson1/clk.h
deleted file mode 100644
index 124642302b12..000000000000
--- a/drivers/clk/loongson1/clk.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (c) 2012-2016 Zhang, Keguang <keguang.zhang@gmail.com>
- */
-
-#ifndef __LOONGSON1_CLK_H
-#define __LOONGSON1_CLK_H
-
-struct clk_hw *clk_hw_register_pll(struct device *dev,
-				   const char *name,
-				   const char *parent_name,
-				   const struct clk_ops *ops,
-				   unsigned long flags);
-
-#endif /* __LOONGSON1_CLK_H */
-- 
2.34.1