[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