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From 3a20e2b3471baf86765747b0e194400d3d74b6d8 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Thu, 8 Mar 2012 11:19:11 +0100
Subject: [PATCH 26/73] MIPS: lantiq: convert falcon to clkdev api
Unify sysctrl/clock code and add clkdev hooks to sysctrl.c
Signed-off-by: John Crispin <blogic@openwrt.org>
---
.../include/asm/mach-lantiq/falcon/lantiq_soc.h | 8 +-
arch/mips/lantiq/falcon/Makefile | 2 +-
arch/mips/lantiq/falcon/sysctrl.c | 129 ++++++++++++--------
3 files changed, 80 insertions(+), 59 deletions(-)
--- a/arch/mips/include/asm/mach-lantiq/falcon/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/falcon/lantiq_soc.h
@@ -95,6 +95,7 @@
/* Activation Status Register */
#define ACTS_ASC1_ACT 0x00000800
+#define ACTS_I2C_ACT 0x00004000
#define ACTS_P0 0x00010000
#define ACTS_P1 0x00010000
#define ACTS_P2 0x00020000
@@ -106,13 +107,6 @@
#define ACTS_PADCTRL3 0x00200000
#define ACTS_PADCTRL4 0x00400000
-extern void ltq_sysctl_activate(int module, unsigned int mask);
-extern void ltq_sysctl_deactivate(int module, unsigned int mask);
-extern void ltq_sysctl_clken(int module, unsigned int mask);
-extern void ltq_sysctl_clkdis(int module, unsigned int mask);
-extern void ltq_sysctl_reboot(int module, unsigned int mask);
-extern int ltq_gpe_is_activated(unsigned int mask);
-
/* global register ranges */
extern __iomem void *ltq_ebu_membase;
extern __iomem void *ltq_sys1_membase;
--- a/arch/mips/lantiq/falcon/Makefile
+++ b/arch/mips/lantiq/falcon/Makefile
@@ -1,2 +1,2 @@
-obj-y := clk.o prom.o reset.o sysctrl.o devices.o gpio.o
+obj-y := prom.o reset.o sysctrl.o devices.o gpio.o
obj-$(CONFIG_LANTIQ_MACH_EASY98000) += mach-easy98000.o
--- a/arch/mips/lantiq/falcon/sysctrl.c
+++ b/arch/mips/lantiq/falcon/sysctrl.c
@@ -9,11 +9,13 @@
#include <linux/ioport.h>
#include <linux/export.h>
+#include <linux/clkdev.h>
#include <asm/delay.h>
#include <lantiq_soc.h>
#include "devices.h"
+#include "../clk.h"
/* infrastructure control register */
#define SYS1_INFRAC 0x00bc
@@ -38,6 +40,10 @@
#define LTQ_SYSCTL_DEACT 0x0028
/* reboot Register */
#define LTQ_SYSCTL_RBT 0x002c
+/* CPU0 Clock Control Register */
+#define LTQ_SYS1_CPU0CC 0x0040
+/* clock divider bit */
+#define LTQ_CPU0CC_CPUDIV 0x0001
static struct resource ltq_sysctl_res[] = {
MEM_RES("sys1", LTQ_SYS1_BASE_ADDR, LTQ_SYS1_SIZE),
@@ -64,79 +70,67 @@ void __iomem *ltq_ebu_membase;
#define ltq_status_r32(x) ltq_r32(ltq_status_membase + (x))
static inline void
-ltq_sysctl_wait(int module, unsigned int mask,
+ltq_sysctl_wait(struct clk *clk,
unsigned int test, unsigned int reg)
{
int err = 1000000;
- do {} while (--err && ((ltq_reg_r32(module, reg)
- & mask) != test));
+ do {} while (--err && ((ltq_reg_r32(clk->module, reg)
+ & clk->bits) != test));
if (!err)
- pr_err("module de/activation failed %d %08X %08X\n",
- module, mask, test);
+ pr_err("module de/activation failed %d %08X %08X %08X\n",
+ clk->module, clk->bits, test,
+ ltq_reg_r32(clk->module, reg) & clk->bits);
}
-void
-ltq_sysctl_activate(int module, unsigned int mask)
-{
- if (module > SYSCTL_SYSGPE)
- return;
-
- ltq_reg_w32(module, mask, LTQ_SYSCTL_CLKEN);
- ltq_reg_w32(module, mask, LTQ_SYSCTL_ACT);
- ltq_sysctl_wait(module, mask, mask, LTQ_SYSCTL_ACTS);
+static int
+ltq_sysctl_activate(struct clk *clk)
+{
+ ltq_reg_w32(clk->module, clk->bits, LTQ_SYSCTL_CLKEN);
+ ltq_reg_w32(clk->module, clk->bits, LTQ_SYSCTL_ACT);
+ ltq_sysctl_wait(clk, clk->bits, LTQ_SYSCTL_ACTS);
+ return 0;
}
-EXPORT_SYMBOL(ltq_sysctl_activate);
-void
-ltq_sysctl_deactivate(int module, unsigned int mask)
+static void
+ltq_sysctl_deactivate(struct clk *clk)
{
- if (module > SYSCTL_SYSGPE)
- return;
-
- ltq_reg_w32(module, mask, LTQ_SYSCTL_CLKCLR);
- ltq_reg_w32(module, mask, LTQ_SYSCTL_DEACT);
- ltq_sysctl_wait(module, mask, 0, LTQ_SYSCTL_ACTS);
+ ltq_reg_w32(clk->module, clk->bits, LTQ_SYSCTL_CLKCLR);
+ ltq_reg_w32(clk->module, clk->bits, LTQ_SYSCTL_DEACT);
+ ltq_sysctl_wait(clk, 0, LTQ_SYSCTL_ACTS);
}
-EXPORT_SYMBOL(ltq_sysctl_deactivate);
-void
-ltq_sysctl_clken(int module, unsigned int mask)
+static int
+ltq_sysctl_clken(struct clk *clk)
{
- if (module > SYSCTL_SYSGPE)
- return;
-
- ltq_reg_w32(module, mask, LTQ_SYSCTL_CLKEN);
- ltq_sysctl_wait(module, mask, mask, LTQ_SYSCTL_CLKS);
+ ltq_reg_w32(clk->module, clk->bits, LTQ_SYSCTL_CLKEN);
+ ltq_sysctl_wait(clk, clk->bits, LTQ_SYSCTL_CLKS);
+ return 0;
}
-EXPORT_SYMBOL(ltq_sysctl_clken);
-void
-ltq_sysctl_clkdis(int module, unsigned int mask)
+static void
+ltq_sysctl_clkdis(struct clk *clk)
{
- if (module > SYSCTL_SYSGPE)
- return;
-
- ltq_reg_w32(module, mask, LTQ_SYSCTL_CLKCLR);
- ltq_sysctl_wait(module, mask, 0, LTQ_SYSCTL_CLKS);
+ ltq_reg_w32(clk->module, clk->bits, LTQ_SYSCTL_CLKCLR);
+ ltq_sysctl_wait(clk, 0, LTQ_SYSCTL_CLKS);
}
-EXPORT_SYMBOL(ltq_sysctl_clkdis);
-void
-ltq_sysctl_reboot(int module, unsigned int mask)
+static void
+ltq_sysctl_reboot(struct clk *clk)
{
unsigned int act;
+ unsigned int bits;
- if (module > SYSCTL_SYSGPE)
- return;
-
- act = ltq_reg_r32(module, LTQ_SYSCTL_ACT);
- if ((~act & mask) != 0)
- ltq_sysctl_activate(module, ~act & mask);
- ltq_reg_w32(module, act & mask, LTQ_SYSCTL_RBT);
- ltq_sysctl_wait(module, mask, mask, LTQ_SYSCTL_ACTS);
+ act = ltq_reg_r32(clk->module, LTQ_SYSCTL_ACT);
+ bits = ~act & clk->bits;
+ if (bits != 0) {
+ ltq_reg_w32(clk->module, bits, LTQ_SYSCTL_CLKEN);
+ ltq_reg_w32(clk->module, bits, LTQ_SYSCTL_ACT);
+ ltq_sysctl_wait(clk, bits, LTQ_SYSCTL_ACTS);
+ }
+ ltq_reg_w32(clk->module, act & clk->bits, LTQ_SYSCTL_RBT);
+ ltq_sysctl_wait(clk, clk->bits, LTQ_SYSCTL_ACTS);
}
-EXPORT_SYMBOL(ltq_sysctl_reboot);
/* enable the ONU core */
static void
@@ -167,6 +161,24 @@ ltq_gpe_enable(void)
udelay(1);
}
+static inline void
+clkdev_add_sys(const char *dev, unsigned int module,
+ unsigned int bits)
+{
+ struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL);
+
+ clk->cl.dev_id = dev;
+ clk->cl.con_id = NULL;
+ clk->cl.clk = clk;
+ clk->module = module;
+ clk->activate = ltq_sysctl_activate;
+ clk->deactivate = ltq_sysctl_deactivate;
+ clk->enable = ltq_sysctl_clken;
+ clk->disable = ltq_sysctl_clkdis;
+ clk->reboot = ltq_sysctl_reboot;
+ clkdev_add(&clk->cl);
+}
+
void __init
ltq_soc_init(void)
{
@@ -180,4 +192,19 @@ ltq_soc_init(void)
ltq_ebu_membase = ltq_remap_resource(<q_ebu_res);
ltq_gpe_enable();
+
+ /* get our 3 static rates for cpu, fpi and io clocks */
+ if (ltq_sys1_r32(LTQ_SYS1_CPU0CC) & LTQ_CPU0CC_CPUDIV)
+ clkdev_add_static(CLOCK_200M, CLOCK_100M, CLOCK_200M);
+ else
+ clkdev_add_static(CLOCK_400M, CLOCK_100M, CLOCK_200M);
+
+ /* add our clock domains */
+ clkdev_add_sys("falcon_gpio.0", SYSCTL_SYSETH, ACTS_PADCTRL0 | ACTS_P0);
+ clkdev_add_sys("falcon_gpio.1", SYSCTL_SYS1, ACTS_PADCTRL1 | ACTS_P1);
+ clkdev_add_sys("falcon_gpio.2", SYSCTL_SYSETH, ACTS_PADCTRL2 | ACTS_P2);
+ clkdev_add_sys("falcon_gpio.3", SYSCTL_SYS1, ACTS_PADCTRL3 | ACTS_P3);
+ clkdev_add_sys("falcon_gpio.4", SYSCTL_SYS1, ACTS_PADCTRL4 | ACTS_P4);
+ clkdev_add_sys("ltq_asc.1", SYSCTL_SYS1, ACTS_ASC1_ACT);
+ clkdev_add_sys("falcon_i2c", SYSCTL_SYS1, ACTS_I2C_ACT);
}
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