[PATCH V2 2/3] clk: loongson1: Remove the outdated driver

From: Keguang Zhang
Date: Thu Feb 09 2023 - 08:28:23 EST

Remove the outdated driver due to the following aspects.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@xxxxxxxxx>
---
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@xxxxxxxxx>
- */
-
-#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@xxxxxxxxx>
- */
-
-#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@xxxxxxxxx>
- */
-
-#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@xxxxxxxxx>
- */
-
-#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