MIPS: Netlogic: Use PIC timer as a clocksource

The XLR/XLS/XLP PIC has a 8 countdown timers which run at the PIC
frequencey. One of these can be used as a clocksource to provide
timestamps that is common across cores. This can be used in place
of the count/compare clocksource which is per-CPU.

On XLR/XLS PIC registers are 32-bit, so we just use the lower 32-bits
of the PIC counter. On XLP, the whole 64-bit can be used.

Provide common macros and functions for PIC timer registers on XLR/XLS
and XLP, and use them to register a PIC clocksource.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4786/
Signed-off-by: John Crispin <blogic@openwrt.org>

2 files changed, 2 insertions, 2 deletions

diff --git a/arch/mips/netlogic/xlr/platform.c b/arch/mips/netlogic/xlr/platform.c
index 507230eeb768..ce838f951356 100644
--- a/arch/mips/netlogic/xlr/platform.c
+++ b/arch/mips/netlogic/xlr/platform.c
@@ -64,7 +64,7 @@ void nlm_xlr_uart_out(struct uart_port *p, int offset, int value)
                 .iotype         = UPIO_MEM32,           \
                 .flags          = (UPF_SKIP_TEST |      \
                          UPF_FIXED_TYPE | UPF_BOOT_AUTOCONF),\
-                .uartclk        = PIC_CLKS_PER_SEC,     \
+                .uartclk        = PIC_CLK_HZ,           \
                 .type           = PORT_16550A,          \
                 .serial_in      = nlm_xlr_uart_in,      \
                 .serial_out     = nlm_xlr_uart_out,     \
diff --git a/arch/mips/netlogic/xlr/setup.c b/arch/mips/netlogic/xlr/setup.c
index c5ce6992ac4c..54b301c809e1 100644
--- a/arch/mips/netlogic/xlr/setup.c
+++ b/arch/mips/netlogic/xlr/setup.c
@@ -70,7 +70,7 @@ static void __init nlm_early_serial_setup(void)
         s.iotype        = UPIO_MEM32;
         s.regshift      = 2;
         s.irq           = PIC_UART_0_IRQ;
-        s.uartclk       = PIC_CLKS_PER_SEC;
+        s.uartclk       = PIC_CLK_HZ;
         s.serial_in     = nlm_xlr_uart_in;
         s.serial_out    = nlm_xlr_uart_out;
         s.mapbase       = uart_base;