[PATCH v5 29/37] MIPS, clk: move jz4740 clock suspend, resume functions to jz4740-cgu
From: Paul Burton
Date: Sun May 24 2015 - 11:30:13 EST
The jz4740-cgu driver already has access to the CGU, so it makes sense
to move the few remaining accesses to the CGU from arch/mips/jz4740
there too. Move the jz4740_clock_{suspend,resume} functions there for
such consistency. The arch/mips/jz4740/clock.c file now contains nothing
more of use & so is removed.
Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx>
Cc: Lars-Peter Clausen <lars@xxxxxxxxxx>
Cc: Mike Turquette <mturquette@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Cc: linux-clk@xxxxxxxxxxxxxxx
Cc: linux-mips@xxxxxxxxxxxxxx
---
Changes in v5: None
Changes in v4: None
Changes in v3:
- Rebase.
Changes in v2: None
arch/mips/include/asm/mach-jz4740/clock.h | 2 -
arch/mips/jz4740/Makefile | 2 +-
arch/mips/jz4740/clock.c | 95 -------------------------------
arch/mips/jz4740/time.c | 1 -
drivers/clk/ingenic/jz4740-cgu.c | 37 ++++++++++++
5 files changed, 38 insertions(+), 99 deletions(-)
delete mode 100644 arch/mips/jz4740/clock.c
diff --git a/arch/mips/include/asm/mach-jz4740/clock.h b/arch/mips/include/asm/mach-jz4740/clock.h
index 01d8468..16659cd 100644
--- a/arch/mips/include/asm/mach-jz4740/clock.h
+++ b/arch/mips/include/asm/mach-jz4740/clock.h
@@ -20,8 +20,6 @@ enum jz4740_wait_mode {
JZ4740_WAIT_MODE_SLEEP,
};
-int jz4740_clock_init(void);
-
void jz4740_clock_set_wait_mode(enum jz4740_wait_mode mode);
void jz4740_clock_udc_enable_auto_suspend(void);
diff --git a/arch/mips/jz4740/Makefile b/arch/mips/jz4740/Makefile
index fdb12efc..7636432 100644
--- a/arch/mips/jz4740/Makefile
+++ b/arch/mips/jz4740/Makefile
@@ -5,7 +5,7 @@
# Object file lists.
obj-y += prom.o time.o reset.o setup.o \
- gpio.o clock.o platform.o timer.o serial.o
+ gpio.o platform.o timer.o serial.o
# board specific support
diff --git a/arch/mips/jz4740/clock.c b/arch/mips/jz4740/clock.c
deleted file mode 100644
index 2a10829..0000000
--- a/arch/mips/jz4740/clock.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * Copyright (C) 2010, Lars-Peter Clausen <lars@xxxxxxxxxx>
- * JZ4740 SoC clock support
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/clk.h>
-#include <linux/clk-provider.h>
-#include <linux/spinlock.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/list.h>
-#include <linux/err.h>
-
-#include <asm/mach-jz4740/clock.h>
-#include <asm/mach-jz4740/base.h>
-
-#include "clock.h"
-
-#define JZ_REG_CLOCK_PLL 0x10
-#define JZ_REG_CLOCK_GATE 0x20
-
-#define JZ_CLOCK_GATE_UART0 BIT(0)
-#define JZ_CLOCK_GATE_TCU BIT(1)
-#define JZ_CLOCK_GATE_DMAC BIT(12)
-
-#define JZ_CLOCK_PLL_STABLE BIT(10)
-#define JZ_CLOCK_PLL_ENABLED BIT(8)
-
-static void __iomem *jz_clock_base;
-
-static uint32_t jz_clk_reg_read(int reg)
-{
- return readl(jz_clock_base + reg);
-}
-
-static void jz_clk_reg_set_bits(int reg, uint32_t mask)
-{
- uint32_t val;
-
- val = readl(jz_clock_base + reg);
- val |= mask;
- writel(val, jz_clock_base + reg);
-}
-
-static void jz_clk_reg_clear_bits(int reg, uint32_t mask)
-{
- uint32_t val;
-
- val = readl(jz_clock_base + reg);
- val &= ~mask;
- writel(val, jz_clock_base + reg);
-}
-
-void jz4740_clock_suspend(void)
-{
- jz_clk_reg_set_bits(JZ_REG_CLOCK_GATE,
- JZ_CLOCK_GATE_TCU | JZ_CLOCK_GATE_DMAC | JZ_CLOCK_GATE_UART0);
-
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_PLL, JZ_CLOCK_PLL_ENABLED);
-}
-
-void jz4740_clock_resume(void)
-{
- uint32_t pll;
-
- jz_clk_reg_set_bits(JZ_REG_CLOCK_PLL, JZ_CLOCK_PLL_ENABLED);
-
- do {
- pll = jz_clk_reg_read(JZ_REG_CLOCK_PLL);
- } while (!(pll & JZ_CLOCK_PLL_STABLE));
-
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_GATE,
- JZ_CLOCK_GATE_TCU | JZ_CLOCK_GATE_DMAC | JZ_CLOCK_GATE_UART0);
-}
-
-int jz4740_clock_init(void)
-{
- jz_clock_base = ioremap(JZ4740_CPM_BASE_ADDR, 0x100);
- if (!jz_clock_base)
- return -EBUSY;
-
- return 0;
-}
diff --git a/arch/mips/jz4740/time.c b/arch/mips/jz4740/time.c
index be9b0a3..9172553 100644
--- a/arch/mips/jz4740/time.c
+++ b/arch/mips/jz4740/time.c
@@ -120,7 +120,6 @@ void __init plat_time_init(void)
struct clk *ext_clk;
of_clk_init(NULL);
- jz4740_clock_init();
jz4740_timer_init();
ext_clk = clk_get(NULL, "ext");
diff --git a/drivers/clk/ingenic/jz4740-cgu.c b/drivers/clk/ingenic/jz4740-cgu.c
index 0e692ed..305a26c2 100644
--- a/drivers/clk/ingenic/jz4740-cgu.c
+++ b/drivers/clk/ingenic/jz4740-cgu.c
@@ -264,3 +264,40 @@ void jz4740_clock_udc_enable_auto_suspend(void)
writel(clkgr, cgu->base + CGU_REG_CLKGR);
}
EXPORT_SYMBOL_GPL(jz4740_clock_udc_enable_auto_suspend);
+
+#define JZ_CLOCK_GATE_UART0 BIT(0)
+#define JZ_CLOCK_GATE_TCU BIT(1)
+#define JZ_CLOCK_GATE_DMAC BIT(12)
+
+void jz4740_clock_suspend(void)
+{
+ uint32_t clkgr, cppcr;
+
+ clkgr = readl(cgu->base + CGU_REG_CLKGR);
+ clkgr |= JZ_CLOCK_GATE_TCU | JZ_CLOCK_GATE_DMAC | JZ_CLOCK_GATE_UART0;
+ writel(clkgr, cgu->base + CGU_REG_CLKGR);
+
+ cppcr = readl(cgu->base + CGU_REG_CPPCR);
+ cppcr &= ~BIT(jz4740_cgu_clocks[JZ4740_CLK_PLL].pll.enable_bit);
+ writel(cppcr, cgu->base + CGU_REG_CPPCR);
+}
+
+void jz4740_clock_resume(void)
+{
+ uint32_t clkgr, cppcr, stable;
+
+ cppcr = readl(cgu->base + CGU_REG_CPPCR);
+ cppcr |= BIT(jz4740_cgu_clocks[JZ4740_CLK_PLL].pll.enable_bit);
+ writel(cppcr, cgu->base + CGU_REG_CPPCR);
+
+ stable = BIT(jz4740_cgu_clocks[JZ4740_CLK_PLL].pll.stable_bit);
+ do {
+ cppcr = readl(cgu->base + CGU_REG_CPPCR);
+ } while (!(cppcr & stable));
+
+ clkgr = readl(cgu->base + CGU_REG_CLKGR);
+ clkgr &= ~JZ_CLOCK_GATE_TCU;
+ clkgr &= ~JZ_CLOCK_GATE_DMAC;
+ clkgr &= ~JZ_CLOCK_GATE_UART0;
+ writel(clkgr, cgu->base + CGU_REG_CLKGR);
+}
--
2.4.1
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