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Date: Mon, 19 Sep 2016 12:38:54 +0800
From: Keguang Zhang <keguang.zhang@...il.com>
To: linux-clk@...r.kernel.org, linux-mips@...ux-mips.org,
linux-kernel@...r.kernel.org
Cc: Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...eaurora.org>,
Kelvin Cheung <keguang.zhang@...il.com>
Subject: [PATCH V1 1/3] clk: Loongson1: Refactor Loongson1 clock
From: Kelvin Cheung <keguang.zhang@...il.com>
Factor out the common functions into loongson1/clk.c
to support both Loongson1B and Loongson1C. And, put
the rest into loongson1/clk-loongson1b.c.
Signed-off-by: Kelvin Cheung <keguang.zhang@...il.com>
---
v1:
Rebase the patch on clk: ls1x: Migrate to clk_hw based OF
and registration APIs.
---
drivers/clk/Makefile | 2 +-
drivers/clk/loongson1/Makefile | 2 +
.../clk/{clk-ls1x.c => loongson1/clk-loongson1b.c} | 51 ++--------------------
drivers/clk/loongson1/clk.c | 43 ++++++++++++++++++
drivers/clk/loongson1/clk.h | 19 ++++++++
5 files changed, 69 insertions(+), 48 deletions(-)
create mode 100644 drivers/clk/loongson1/Makefile
rename drivers/clk/{clk-ls1x.c => loongson1/clk-loongson1b.c} (78%)
create mode 100644 drivers/clk/loongson1/clk.c
create mode 100644 drivers/clk/loongson1/clk.h
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 8264d81..925081e 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -26,7 +26,6 @@ obj-$(CONFIG_ARCH_CLPS711X) += clk-clps711x.o
obj-$(CONFIG_COMMON_CLK_CS2000_CP) += clk-cs2000-cp.o
obj-$(CONFIG_ARCH_EFM32) += clk-efm32gg.o
obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
-obj-$(CONFIG_MACH_LOONGSON32) += clk-ls1x.o
obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o
obj-$(CONFIG_ARCH_MB86S7X) += clk-mb86s7x.o
obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o
@@ -61,6 +60,7 @@ obj-$(CONFIG_ARCH_HISI) += hisilicon/
obj-$(CONFIG_ARCH_MXC) += imx/
obj-$(CONFIG_MACH_INGENIC) += ingenic/
obj-$(CONFIG_COMMON_CLK_KEYSTONE) += keystone/
+obj-$(CONFIG_MACH_LOONGSON32) += loongson1/
obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/
obj-$(CONFIG_COMMON_CLK_AMLOGIC) += meson/
obj-$(CONFIG_MACH_PIC32) += microchip/
diff --git a/drivers/clk/loongson1/Makefile b/drivers/clk/loongson1/Makefile
new file mode 100644
index 0000000..5a162a1
--- /dev/null
+++ b/drivers/clk/loongson1/Makefile
@@ -0,0 +1,2 @@
+obj-y += clk.o
+obj-$(CONFIG_LOONGSON1_LS1B) += clk-loongson1b.o
diff --git a/drivers/clk/clk-ls1x.c b/drivers/clk/loongson1/clk-loongson1b.c
similarity index 78%
rename from drivers/clk/clk-ls1x.c
rename to drivers/clk/loongson1/clk-loongson1b.c
index 8430e45..5b6817e 100644
--- a/drivers/clk/clk-ls1x.c
+++ b/drivers/clk/loongson1/clk-loongson1b.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2012 Zhang, Keguang <keguang.zhang@...il.com>
+ * Copyright (c) 2012-2016 Zhang, Keguang <keguang.zhang@...il.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -10,25 +10,16 @@
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
-#include <linux/slab.h>
#include <linux/err.h>
#include <loongson1.h>
+#include "clk.h"
#define OSC (33 * 1000000)
#define DIV_APB 2
static DEFINE_SPINLOCK(_lock);
-static int ls1x_pll_clk_enable(struct clk_hw *hw)
-{
- return 0;
-}
-
-static void ls1x_pll_clk_disable(struct clk_hw *hw)
-{
-}
-
static unsigned long ls1x_pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
@@ -43,44 +34,9 @@ static unsigned long ls1x_pll_recalc_rate(struct clk_hw *hw,
}
static const struct clk_ops ls1x_pll_clk_ops = {
- .enable = ls1x_pll_clk_enable,
- .disable = ls1x_pll_clk_disable,
.recalc_rate = ls1x_pll_recalc_rate,
};
-static struct clk_hw *__init clk_hw_register_pll(struct device *dev,
- const char *name,
- const char *parent_name,
- unsigned long flags)
-{
- int ret;
- struct clk_hw *hw;
- struct clk_init_data init;
-
- /* allocate the divider */
- hw = kzalloc(sizeof(struct clk_hw), GFP_KERNEL);
- if (!hw) {
- pr_err("%s: could not allocate clk_hw\n", __func__);
- return ERR_PTR(-ENOMEM);
- }
-
- init.name = name;
- init.ops = &ls1x_pll_clk_ops;
- init.flags = flags | CLK_IS_BASIC;
- 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;
-}
-
static const char * const cpu_parents[] = { "cpu_clk_div", "osc_33m_clk", };
static const char * const ahb_parents[] = { "ahb_clk_div", "osc_33m_clk", };
static const char * const dc_parents[] = { "dc_clk_div", "osc_33m_clk", };
@@ -93,7 +49,8 @@ void __init ls1x_clk_init(void)
clk_hw_register_clkdev(hw, "osc_33m_clk", NULL);
/* clock derived from 33 MHz OSC clk */
- hw = clk_hw_register_pll(NULL, "pll_clk", "osc_33m_clk", 0);
+ hw = clk_hw_register_pll(NULL, "pll_clk", "osc_33m_clk",
+ &ls1x_pll_clk_ops, 0);
clk_hw_register_clkdev(hw, "pll_clk", NULL);
/* clock derived from PLL clk */
diff --git a/drivers/clk/loongson1/clk.c b/drivers/clk/loongson1/clk.c
new file mode 100644
index 0000000..cfcfd14
--- /dev/null
+++ b/drivers/clk/loongson1/clk.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2012-2016 Zhang, Keguang <keguang.zhang@...il.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/slab.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 | CLK_IS_BASIC;
+ 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
new file mode 100644
index 0000000..085d74b
--- /dev/null
+++ b/drivers/clk/loongson1/clk.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2012-2016 Zhang, Keguang <keguang.zhang@...il.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#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 */
--
1.9.1
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