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authorPaul Walmsley <paul@pwsan.com>2010-01-26 20:13:08 -0700
committerPaul Walmsley <paul@pwsan.com>2010-01-28 18:13:49 -0700
commit44da0a51032f3d90a441bd80c2efe68532104980 (patch)
tree25f119597684c1d7ce2a2525d6f3c3c2c0fc4053
parent87a1b26c2d31dce62758b78c077ff5a1b5a52ab8 (diff)
downloadlinux-linaro-android-44da0a51032f3d90a441bd80c2efe68532104980.tar.gz
OMAP2xxx clock: move sys_clk code into mach-omap2/clkt2xxx_sys.c
Move the sys_clk clock functions from clock2xxx.c to mach-omap2/clkt2xxx_sys.c. This is intended to make the clock code easier to understand, since all of the functions needed to manage the sys_clk are now located in their own file, rather than being mixed with other, unrelated functions. Clock debugging is also now more finely-grained, since the DEBUG macro can now be defined for the sys_clk clock alone. This should reduce unnecessary console noise when debugging. Also, if at some future point the mach-omap2/ directory is split into OMAP2/3/4 variants, this clkt file can be placed in the mach-omap2xxx/ directory, rather than shared with other chip types that don't use this clock type. Thanks to Alexander Shishkin <virtuoso@slind.org> for his comments to improve the patch description. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Alexander Shishkin <virtuoso@slind.org>
-rw-r--r--arch/arm/mach-omap2/Makefile3
-rw-r--r--arch/arm/mach-omap2/clkt2xxx_sys.c50
-rw-r--r--arch/arm/mach-omap2/clock2xxx.c30
-rw-r--r--arch/arm/mach-omap2/clock2xxx.h3
-rw-r--r--arch/arm/mach-omap2/clock2xxx_data.c4
5 files changed, 55 insertions, 35 deletions
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 51178bff698..7ce5fea7f2b 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -13,7 +13,8 @@ clock-common = clock.o clock_common_data.o \
clkt_clksel.o
clock-omap2xxx = clkt2xxx_dpllcore.o \
clkt2xxx_virt_prcm_set.o \
- clkt2xxx_apll.o clkt2xxx_osc.o
+ clkt2xxx_apll.o clkt2xxx_osc.o \
+ clkt2xxx_sys.o
obj-$(CONFIG_ARCH_OMAP2) += $(omap-2-3-common) $(prcm-common) $(clock-common) \
$(clock-omap2xxx)
diff --git a/arch/arm/mach-omap2/clkt2xxx_sys.c b/arch/arm/mach-omap2/clkt2xxx_sys.c
new file mode 100644
index 00000000000..822b5a79f45
--- /dev/null
+++ b/arch/arm/mach-omap2/clkt2xxx_sys.c
@@ -0,0 +1,50 @@
+/*
+ * OMAP2xxx sys_clk-specific clock code
+ *
+ * Copyright (C) 2005-2008 Texas Instruments, Inc.
+ * Copyright (C) 2004-2010 Nokia Corporation
+ *
+ * Contacts:
+ * Richard Woodruff <r-woodruff2@ti.com>
+ * Paul Walmsley
+ *
+ * Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
+ * Gordon McNutt and RidgeRun, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <plat/clock.h>
+
+#include "clock.h"
+#include "clock2xxx.h"
+#include "prm.h"
+#include "prm-regbits-24xx.h"
+
+void __iomem *prcm_clksrc_ctrl;
+
+u32 omap2xxx_get_sysclkdiv(void)
+{
+ u32 div;
+
+ div = __raw_readl(prcm_clksrc_ctrl);
+ div &= OMAP_SYSCLKDIV_MASK;
+ div >>= OMAP_SYSCLKDIV_SHIFT;
+
+ return div;
+}
+
+unsigned long omap2xxx_sys_clk_recalc(struct clk *clk)
+{
+ return clk->parent->rate / omap2xxx_get_sysclkdiv();
+}
+
+
diff --git a/arch/arm/mach-omap2/clock2xxx.c b/arch/arm/mach-omap2/clock2xxx.c
index 62c3b022a1e..b59cb1d2bf5 100644
--- a/arch/arm/mach-omap2/clock2xxx.c
+++ b/arch/arm/mach-omap2/clock2xxx.c
@@ -46,8 +46,6 @@
struct clk *vclk, *sclk, *dclk;
-void __iomem *prcm_clksrc_ctrl;
-
/*-------------------------------------------------------------------------
* Omap24xx specific clock functions
*-------------------------------------------------------------------------*/
@@ -79,34 +77,6 @@ const struct clkops clkops_omap2430_i2chs_wait = {
.find_companion = omap2_clk_dflt_find_companion,
};
-#ifdef OLD_CK
-/* Recalculate SYST_CLK */
-static void omap2_sys_clk_recalc(struct clk *clk)
-{
- u32 div = PRCM_CLKSRC_CTRL;
- div &= (1 << 7) | (1 << 6); /* Test if ext clk divided by 1 or 2 */
- div >>= clk->rate_offset;
- clk->rate = (clk->parent->rate / div);
- propagate_rate(clk);
-}
-#endif /* OLD_CK */
-
-u32 omap2xxx_get_sysclkdiv(void)
-{
- u32 div;
-
- div = __raw_readl(prcm_clksrc_ctrl);
- div &= OMAP_SYSCLKDIV_MASK;
- div >>= OMAP_SYSCLKDIV_SHIFT;
-
- return div;
-}
-
-unsigned long omap2_sys_clk_recalc(struct clk *clk)
-{
- return clk->parent->rate / omap2xxx_get_sysclkdiv();
-}
-
/*
* Set clocks for bypass mode for reboot to work.
*/
diff --git a/arch/arm/mach-omap2/clock2xxx.h b/arch/arm/mach-omap2/clock2xxx.h
index 3b0610dbbd3..c14061b2b9f 100644
--- a/arch/arm/mach-omap2/clock2xxx.h
+++ b/arch/arm/mach-omap2/clock2xxx.h
@@ -11,9 +11,8 @@
unsigned long omap2_table_mpu_recalc(struct clk *clk);
int omap2_select_table_rate(struct clk *clk, unsigned long rate);
long omap2_round_to_table_rate(struct clk *clk, unsigned long rate);
-unsigned long omap2_sys_clk_recalc(struct clk *clk);
+unsigned long omap2xxx_sys_clk_recalc(struct clk *clk);
unsigned long omap2_osc_clk_recalc(struct clk *clk);
-unsigned long omap2_sys_clk_recalc(struct clk *clk);
unsigned long omap2_dpllcore_recalc(struct clk *clk);
int omap2_reprogram_dpllcore(struct clk *clk, unsigned long rate);
unsigned long omap2xxx_clk_get_core_rate(struct clk *clk);
diff --git a/arch/arm/mach-omap2/clock2xxx_data.c b/arch/arm/mach-omap2/clock2xxx_data.c
index 402115fa9c1..3a435bb8f02 100644
--- a/arch/arm/mach-omap2/clock2xxx_data.c
+++ b/arch/arm/mach-omap2/clock2xxx_data.c
@@ -79,7 +79,7 @@ static struct clk sys_ck = { /* (*12, *13, 19.2, 26, 38.4)MHz */
.ops = &clkops_null,
.parent = &osc_ck,
.clkdm_name = "wkup_clkdm",
- .recalc = &omap2_sys_clk_recalc,
+ .recalc = &omap2xxx_sys_clk_recalc,
};
static struct clk alt_ck = { /* Typical 54M or 48M, may not exist */
@@ -2264,7 +2264,7 @@ int __init omap2_clk_init(void)
osc_ck.rate = omap2_osc_clk_recalc(&osc_ck);
propagate_rate(&osc_ck);
- sys_ck.rate = omap2_sys_clk_recalc(&sys_ck);
+ sys_ck.rate = omap2xxx_sys_clk_recalc(&sys_ck);
propagate_rate(&sys_ck);
for (c = omap24xx_clks; c < omap24xx_clks + ARRAY_SIZE(omap24xx_clks); c++)