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authorRonen Shitrit <rshitrit@marvell.com>2008-09-15 00:56:38 +0200
committerNicolas Pitre <nico@cam.org>2008-09-25 16:27:21 -0400
commit79d4dd77f0d86e4315887edaa5dfabb0c2081ba7 (patch)
treea948613f73082158c753d8fc455197360ddee313
parent0b0740c3c120d1fd7b9a04f04ab79bee12c4cc38 (diff)
[ARM] Kirkwood: prepare for runtime-determined timer tick rate
Currently, kirkwood uses a hardcoded timer tick rate of 166 MHz, but the actual timer tick rate varies between different members of the SoC family. This patch prepares for runtime determination of the timer tick rate. Signed-off-by: Ronen Shitrit <rshitrit@marvell.com>
-rw-r--r--arch/arm/mach-kirkwood/common.c22
-rw-r--r--arch/arm/mach-kirkwood/include/mach/timex.h1
2 files changed, 16 insertions, 7 deletions
diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index 435fb35a484..2e79dabac53 100644
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -98,7 +98,6 @@ void __init kirkwood_ehci_init(void)
* GE00
****************************************************************************/
struct mv643xx_eth_shared_platform_data kirkwood_ge00_shared_data = {
- .t_clk = KIRKWOOD_TCLK,
.dram = &kirkwood_mbus_dram_info,
};
@@ -206,7 +205,6 @@ void __init kirkwood_sata_init(struct mv_sata_platform_data *sata_data)
* SPI
****************************************************************************/
static struct orion_spi_info kirkwood_spi_plat_data = {
- .tclk = KIRKWOOD_TCLK,
};
static struct resource kirkwood_spi_resources[] = {
@@ -244,7 +242,7 @@ static struct plat_serial8250_port kirkwood_uart0_data[] = {
.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
.regshift = 2,
- .uartclk = KIRKWOOD_TCLK,
+ .uartclk = 0,
}, {
},
};
@@ -288,7 +286,7 @@ static struct plat_serial8250_port kirkwood_uart1_data[] = {
.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
.regshift = 2,
- .uartclk = KIRKWOOD_TCLK,
+ .uartclk = 0,
}, {
},
};
@@ -530,9 +528,17 @@ void __init kirkwood_xor1_init(void)
/*****************************************************************************
* Time handling
****************************************************************************/
+int kirkwood_tclk;
+
+int __init kirkwood_find_tclk(void)
+{
+ return 166666667;
+}
+
static void kirkwood_timer_init(void)
{
- orion_time_init(IRQ_KIRKWOOD_BRIDGE, KIRKWOOD_TCLK);
+ kirkwood_tclk = kirkwood_find_tclk();
+ orion_time_init(IRQ_KIRKWOOD_BRIDGE, kirkwood_tclk);
}
struct sys_timer kirkwood_timer = {
@@ -565,7 +571,11 @@ static int __init is_l2_writethrough(void)
void __init kirkwood_init(void)
{
printk(KERN_INFO "Kirkwood: %s, TCLK=%d.\n",
- kirkwood_id(), KIRKWOOD_TCLK);
+ kirkwood_id(), kirkwood_tclk);
+ kirkwood_ge00_shared_data.t_clk = kirkwood_tclk;
+ kirkwood_spi_plat_data.tclk = kirkwood_tclk;
+ kirkwood_uart0_data[0].uartclk = kirkwood_tclk;
+ kirkwood_uart1_data[0].uartclk = kirkwood_tclk;
kirkwood_setup_cpu_mbus();
diff --git a/arch/arm/mach-kirkwood/include/mach/timex.h b/arch/arm/mach-kirkwood/include/mach/timex.h
index f77ef4a32c5..c923cd169b9 100644
--- a/arch/arm/mach-kirkwood/include/mach/timex.h
+++ b/arch/arm/mach-kirkwood/include/mach/timex.h
@@ -8,4 +8,3 @@
#define CLOCK_TICK_RATE (100 * HZ)
-#define KIRKWOOD_TCLK 166666667