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-rw-r--r--target/linux/lantiq/patches-3.2/0025-MIPS-lantiq-convert-to-clkdev-api.patch299
1 files changed, 299 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.2/0025-MIPS-lantiq-convert-to-clkdev-api.patch b/target/linux/lantiq/patches-3.2/0025-MIPS-lantiq-convert-to-clkdev-api.patch
new file mode 100644
index 0000000000..cad0a99ea0
--- /dev/null
+++ b/target/linux/lantiq/patches-3.2/0025-MIPS-lantiq-convert-to-clkdev-api.patch
@@ -0,0 +1,299 @@
+From 25db3804c7c9ed3ee5161b00b38de84b1d19f6a8 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Thu, 8 Mar 2012 08:39:06 +0100
+Subject: [PATCH 25/70] MIPS: lantiq: convert to clkdev api
+
+* Change setup from HAVE_CLK -> HAVE_MACH_CLKDEV/CLKDEV_LOOKUP
+* Add clk_activate/clk_deactivate
+* Add better error paths to the clk_*() functions
+* Change the way our static clocks are referenced
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/Kconfig | 3 +-
+ arch/mips/include/asm/mach-lantiq/lantiq.h | 20 ++----
+ arch/mips/lantiq/clk.c | 96 +++++++++++++++------------
+ arch/mips/lantiq/clk.h | 52 ++++++++++++++-
+ arch/mips/lantiq/prom.c | 1 -
+ 5 files changed, 111 insertions(+), 61 deletions(-)
+
+diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
+index c1ceadb..1b78cd7 100644
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -225,7 +225,8 @@ config LANTIQ
+ select ARCH_REQUIRE_GPIOLIB
+ select SWAP_IO_SPACE
+ select BOOT_RAW
+- select HAVE_CLK
++ select HAVE_MACH_CLKDEV
++ select CLKDEV_LOOKUP
+ select HAVE_OPROFILE
+ select MIPS_MACHINE
+
+diff --git a/arch/mips/include/asm/mach-lantiq/lantiq.h b/arch/mips/include/asm/mach-lantiq/lantiq.h
+index 924b91a..622847f 100644
+--- a/arch/mips/include/asm/mach-lantiq/lantiq.h
++++ b/arch/mips/include/asm/mach-lantiq/lantiq.h
+@@ -9,6 +9,7 @@
+ #define _LANTIQ_H__
+
+ #include <linux/irq.h>
++#include <linux/clk.h>
+ #include <linux/ioport.h>
+
+ /* generic reg access functions */
+@@ -22,18 +23,6 @@
+ extern unsigned int ltq_get_cpu_ver(void);
+ extern unsigned int ltq_get_soc_type(void);
+
+-/* clock speeds */
+-#define CLOCK_60M 60000000
+-#define CLOCK_83M 83333333
+-#define CLOCK_100M 100000000
+-#define CLOCK_111M 111111111
+-#define CLOCK_133M 133333333
+-#define CLOCK_167M 166666667
+-#define CLOCK_200M 200000000
+-#define CLOCK_266M 266666666
+-#define CLOCK_333M 333333333
+-#define CLOCK_400M 400000000
+-
+ /* spinlock all ebu i/o */
+ extern spinlock_t ebu_lock;
+
+@@ -46,6 +35,13 @@ extern void ltq_disable_irq(struct irq_data *data);
+ extern void ltq_mask_and_ack_irq(struct irq_data *data);
+ extern void ltq_enable_irq(struct irq_data *data);
+
++/* clock handling */
++extern int clk_activate(struct clk *clk);
++extern void clk_deactivate(struct clk *clk);
++extern struct clk *clk_get_cpu(void);
++extern struct clk *clk_get_fpi(void);
++extern struct clk *clk_get_io(void);
++
+ /* find out what caused the last cpu reset */
+ extern int ltq_reset_cause(void);
+
+diff --git a/arch/mips/lantiq/clk.c b/arch/mips/lantiq/clk.c
+index 39eef7f..84a201e 100644
+--- a/arch/mips/lantiq/clk.c
++++ b/arch/mips/lantiq/clk.c
+@@ -12,6 +12,7 @@
+ #include <linux/kernel.h>
+ #include <linux/types.h>
+ #include <linux/clk.h>
++#include <linux/clkdev.h>
+ #include <linux/err.h>
+ #include <linux/list.h>
+
+@@ -24,33 +25,29 @@
+ #include "clk.h"
+ #include "prom.h"
+
+-struct clk {
+- const char *name;
+- unsigned long rate;
+- unsigned long (*get_rate) (void);
+-};
++/* lantiq socs have 3 static clocks */
++static struct clk cpu_clk_generic[3];
+
+-static struct clk *cpu_clk;
+-static int cpu_clk_cnt;
++void clkdev_add_static(unsigned long cpu, unsigned long fpi, unsigned long io)
++{
++ cpu_clk_generic[0].rate = cpu;
++ cpu_clk_generic[1].rate = fpi;
++ cpu_clk_generic[2].rate = io;
++}
+
+-/* lantiq socs have 3 static clocks */
+-static struct clk cpu_clk_generic[] = {
+- {
+- .name = "cpu",
+- .get_rate = ltq_get_cpu_hz,
+- }, {
+- .name = "fpi",
+- .get_rate = ltq_get_fpi_hz,
+- }, {
+- .name = "io",
+- .get_rate = ltq_get_io_region_clock,
+- },
+-};
+-
+-void clk_init(void)
++struct clk *clk_get_cpu(void)
++{
++ return &cpu_clk_generic[0];
++}
++
++struct clk *clk_get_fpi(void)
+ {
+- cpu_clk = cpu_clk_generic;
+- cpu_clk_cnt = ARRAY_SIZE(cpu_clk_generic);
++ return &cpu_clk_generic[1];
++}
++
++struct clk *clk_get_io(void)
++{
++ return &cpu_clk_generic[2];
+ }
+
+ static inline int clk_good(struct clk *clk)
+@@ -73,36 +70,49 @@ unsigned long clk_get_rate(struct clk *clk)
+ }
+ EXPORT_SYMBOL(clk_get_rate);
+
+-struct clk *clk_get(struct device *dev, const char *id)
++int clk_enable(struct clk *clk)
+ {
+- int i;
++ if (unlikely(!clk_good(clk)))
++ return -1;
++
++ if (clk->enable)
++ return clk->enable(clk);
+
+- for (i = 0; i < cpu_clk_cnt; i++)
+- if (!strcmp(id, cpu_clk[i].name))
+- return &cpu_clk[i];
+- BUG();
+- return ERR_PTR(-ENOENT);
++ return -1;
+ }
+-EXPORT_SYMBOL(clk_get);
++EXPORT_SYMBOL(clk_enable);
+
+-void clk_put(struct clk *clk)
++void clk_disable(struct clk *clk)
+ {
+- /* not used */
++ if (unlikely(!clk_good(clk)))
++ return;
++
++ if (clk->disable)
++ clk->disable(clk);
+ }
+-EXPORT_SYMBOL(clk_put);
++EXPORT_SYMBOL(clk_disable);
+
+-int clk_enable(struct clk *clk)
++int clk_activate(struct clk *clk)
+ {
+- /* not used */
+- return 0;
++ if (unlikely(!clk_good(clk)))
++ return -1;
++
++ if (clk->activate)
++ return clk->activate(clk);
++
++ return -1;
+ }
+-EXPORT_SYMBOL(clk_enable);
++EXPORT_SYMBOL(clk_activate);
+
+-void clk_disable(struct clk *clk)
++void clk_deactivate(struct clk *clk)
+ {
+- /* not used */
++ if (unlikely(!clk_good(clk)))
++ return;
++
++ if (clk->deactivate)
++ clk->deactivate(clk);
+ }
+-EXPORT_SYMBOL(clk_disable);
++EXPORT_SYMBOL(clk_deactivate);
+
+ static inline u32 ltq_get_counter_resolution(void)
+ {
+@@ -126,7 +136,7 @@ void __init plat_time_init(void)
+
+ ltq_soc_init();
+
+- clk = clk_get(0, "cpu");
++ clk = clk_get_cpu();
+ mips_hpt_frequency = clk_get_rate(clk) / ltq_get_counter_resolution();
+ write_c0_compare(read_c0_count());
+ pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
+diff --git a/arch/mips/lantiq/clk.h b/arch/mips/lantiq/clk.h
+index 3328925..d047768 100644
+--- a/arch/mips/lantiq/clk.h
++++ b/arch/mips/lantiq/clk.h
+@@ -9,10 +9,54 @@
+ #ifndef _LTQ_CLK_H__
+ #define _LTQ_CLK_H__
+
+-extern void clk_init(void);
++#include <linux/clkdev.h>
+
+-extern unsigned long ltq_get_cpu_hz(void);
+-extern unsigned long ltq_get_fpi_hz(void);
+-extern unsigned long ltq_get_io_region_clock(void);
++/* clock speeds */
++#define CLOCK_60M 60000000
++#define CLOCK_62_5M 62500000
++#define CLOCK_83M 83333333
++#define CLOCK_83_5M 83500000
++#define CLOCK_98_304M 98304000
++#define CLOCK_100M 100000000
++#define CLOCK_111M 111111111
++#define CLOCK_125M 125000000
++#define CLOCK_133M 133333333
++#define CLOCK_150M 150000000
++#define CLOCK_166M 166666666
++#define CLOCK_167M 166666667
++#define CLOCK_196_608M 196608000
++#define CLOCK_200M 200000000
++#define CLOCK_250M 250000000
++#define CLOCK_266M 266666666
++#define CLOCK_300M 300000000
++#define CLOCK_333M 333333333
++#define CLOCK_393M 393215332
++#define CLOCK_400M 400000000
++#define CLOCK_500M 500000000
++#define CLOCK_600M 600000000
++
++struct clk {
++ struct clk_lookup cl;
++ unsigned long rate;
++ unsigned long (*get_rate) (void);
++ unsigned int module;
++ unsigned int bits;
++ int (*enable) (struct clk *clk);
++ void (*disable) (struct clk *clk);
++ int (*activate) (struct clk *clk);
++ void (*deactivate) (struct clk *clk);
++ void (*reboot) (struct clk *clk);
++};
++
++extern void clkdev_add_static(unsigned long cpu, unsigned long fpi,
++ unsigned long io);
++
++extern unsigned long ltq_danube_cpu_hz(void);
++extern unsigned long ltq_danube_fpi_hz(void);
++extern unsigned long ltq_danube_io_region_clock(void);
++
++extern unsigned long ltq_vr9_cpu_hz(void);
++extern unsigned long ltq_vr9_fpi_hz(void);
++extern unsigned long ltq_vr9_io_region_clock(void);
+
+ #endif
+diff --git a/arch/mips/lantiq/prom.c b/arch/mips/lantiq/prom.c
+index acb8921..971554b 100644
+--- a/arch/mips/lantiq/prom.c
++++ b/arch/mips/lantiq/prom.c
+@@ -103,7 +103,6 @@ EXPORT_SYMBOL(ltq_remap_resource);
+ void __init prom_init(void)
+ {
+ ltq_soc_detect(&soc_info);
+- clk_init();
+ snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
+ soc_info.name, soc_info.rev_type);
+ soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
+--
+1.7.7.1
+
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