[ARM] Orion: prepare for runtime-determined timer tick rate
Currently, orion5x uses a hardcoded timer tick rate of 166 MHz, but
the actual timer tick rate varies between different members of the SoC
family (and can vary based on strap pin settings).
This patch prepares for runtime determination of the timer tick rate.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
index 83367265..8a8b089 100644
--- a/arch/arm/mach-orion5x/common.c
+++ b/arch/arm/mach-orion5x/common.c
@@ -146,7 +146,6 @@
****************************************************************************/
struct mv643xx_eth_shared_platform_data orion5x_eth_shared_data = {
.dram = &orion5x_mbus_dram_info,
- .t_clk = ORION5X_TCLK,
};
static struct resource orion5x_eth_shared_resources[] = {
@@ -282,7 +281,7 @@
.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
.regshift = 2,
- .uartclk = ORION5X_TCLK,
+ .uartclk = 0,
}, {
},
};
@@ -326,7 +325,7 @@
.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
.regshift = 2,
- .uartclk = ORION5X_TCLK,
+ .uartclk = 0,
}, {
},
};
@@ -459,9 +458,17 @@
/*****************************************************************************
* Time handling
****************************************************************************/
+int orion5x_tclk;
+
+int __init orion5x_find_tclk(void)
+{
+ return 166666667;
+}
+
static void orion5x_timer_init(void)
{
- orion_time_init(IRQ_ORION5X_BRIDGE, ORION5X_TCLK);
+ orion5x_tclk = orion5x_find_tclk();
+ orion_time_init(IRQ_ORION5X_BRIDGE, orion5x_tclk);
}
struct sys_timer orion5x_timer = {
@@ -514,7 +521,11 @@
u32 dev, rev;
orion5x_id(&dev, &rev, &dev_name);
- printk(KERN_INFO "Orion ID: %s. TCLK=%d.\n", dev_name, ORION5X_TCLK);
+ printk(KERN_INFO "Orion ID: %s. TCLK=%d.\n", dev_name, orion5x_tclk);
+
+ orion5x_eth_shared_data.t_clk = orion5x_tclk;
+ orion5x_uart0_data[0].uartclk = orion5x_tclk;
+ orion5x_uart1_data[0].uartclk = orion5x_tclk;
/*
* Setup Orion address map
diff --git a/arch/arm/mach-orion5x/common.h b/arch/arm/mach-orion5x/common.h
index e75bd70..c8598cc 100644
--- a/arch/arm/mach-orion5x/common.h
+++ b/arch/arm/mach-orion5x/common.h
@@ -10,6 +10,7 @@
void orion5x_map_io(void);
void orion5x_init_irq(void);
void orion5x_init(void);
+extern int orion5x_tclk;
extern struct sys_timer orion5x_timer;
/*
diff --git a/arch/arm/mach-orion5x/include/mach/timex.h b/arch/arm/mach-orion5x/include/mach/timex.h
index e82e44d..4c69820 100644
--- a/arch/arm/mach-orion5x/include/mach/timex.h
+++ b/arch/arm/mach-orion5x/include/mach/timex.h
@@ -9,5 +9,3 @@
*/
#define CLOCK_TICK_RATE (100 * HZ)
-
-#define ORION5X_TCLK 166666667
diff --git a/arch/arm/mach-orion5x/kurobox_pro-setup.c b/arch/arm/mach-orion5x/kurobox_pro-setup.c
index cb72f1b..171ffaf 100644
--- a/arch/arm/mach-orion5x/kurobox_pro-setup.c
+++ b/arch/arm/mach-orion5x/kurobox_pro-setup.c
@@ -291,7 +291,7 @@
const unsigned char shutdownwait[] = {0x00, 0x0c};
const unsigned char poweroff[] = {0x00, 0x06};
/* 38400 baud divisor */
- const unsigned divisor = ((ORION5X_TCLK + (8 * 38400)) / (16 * 38400));
+ const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400));
pr_info("%s: triggering power-off...\n", __func__);
diff --git a/arch/arm/mach-orion5x/tsx09-common.c b/arch/arm/mach-orion5x/tsx09-common.c
index 83feac3..5128da1 100644
--- a/arch/arm/mach-orion5x/tsx09-common.c
+++ b/arch/arm/mach-orion5x/tsx09-common.c
@@ -16,6 +16,7 @@
#include <linux/timex.h>
#include <linux/serial_reg.h>
#include "tsx09-common.h"
+#include "common.h"
/*****************************************************************************
* QNAP TS-x09 specific power off method via UART1-attached PIC
@@ -26,7 +27,7 @@
void qnap_tsx09_power_off(void)
{
/* 19200 baud divisor */
- const unsigned divisor = ((ORION5X_TCLK + (8 * 19200)) / (16 * 19200));
+ const unsigned divisor = ((orion5x_tclk + (8 * 19200)) / (16 * 19200));
pr_info("%s: triggering power-off...\n", __func__);