avr32: Allow board to define oscillator rates

On our custom board we have other oscillator rates than on atngw100 and
atstk100x.

Currently these rates are hardcoded in arch/avr32/mach-at32ap/at32ap700x.c.

This patch moves them into board specific code.

Signed-off-by: Alex Raimondi <raimondi@miromico.ch>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

arch/avr32/boards/atngw100/setup.c

@@ -25,6 +25,13 @@
 #include <asm/arch/init.h>
 #include <asm/arch/portmux.h>
 
+/* Oscillator frequencies. These are board-specific */
+unsigned long at32_board_osc_rates[3] = {
+	[0] = 32768,	/* 32.768 kHz on RTC osc */
+	[1] = 20000000,	/* 20 MHz on osc0 */
+	[2] = 12000000,	/* 12 MHz on osc1 */
+};
+
 /* Initialized by bootloader-specific startup code. */
 struct tag *bootloader_tags __initdata;
 

arch/avr32/boards/atstk1000/atstk1002.c

@@ -28,6 +28,12 @@
 
 #include "atstk1000.h"
 
+/* Oscillator frequencies. These are board specific */
+unsigned long at32_board_osc_rates[3] = {
+	[0] = 32768,	/* 32.768 kHz on RTC osc */
+	[1] = 20000000,	/* 20 MHz on osc0 */
+	[2] = 12000000,	/* 12 MHz on osc1 */
+};
 
 struct eth_addr {
 	u8 addr[6];

arch/avr32/boards/atstk1000/atstk1003.c

@@ -27,6 +27,13 @@
 
 #include "atstk1000.h"
 
+/* Oscillator frequencies. These are board specific */
+unsigned long at32_board_osc_rates[3] = {
+	[0] = 32768,	/* 32.768 kHz on RTC osc */
+	[1] = 20000000,	/* 20 MHz on osc0 */
+	[2] = 12000000,	/* 12 MHz on osc1 */
+};
+
 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 static struct at73c213_board_info at73c213_data = {
 	.ssc_id		= 0,

arch/avr32/boards/atstk1000/atstk1004.c

@@ -29,6 +29,13 @@
 
 #include "atstk1000.h"
 
+/* Oscillator frequencies. These are board specific */
+unsigned long at32_board_osc_rates[3] = {
+	[0] = 32768,	/* 32.768 kHz on RTC osc */
+	[1] = 20000000,	/* 20 MHz on osc0 */
+	[2] = 12000000,	/* 12 MHz on osc1 */
+};
+
 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 static struct at73c213_board_info at73c213_data = {
 	.ssc_id		= 0,

arch/avr32/mach-at32ap/at32ap700x.c

@@ -93,19 +93,12 @@ static struct clk devname##_##_name = {				\
 
 static DEFINE_SPINLOCK(pm_lock);
 
-unsigned long at32ap7000_osc_rates[3] = {
-	[0] = 32768,
-	/* FIXME: these are ATSTK1002-specific */
-	[1] = 20000000,
-	[2] = 12000000,
-};
-
 static struct clk osc0;
 static struct clk osc1;
 
 static unsigned long osc_get_rate(struct clk *clk)
 {
-	return at32ap7000_osc_rates[clk->index];
+	return at32_board_osc_rates[clk->index];
 }
 
 static unsigned long pll_get_rate(struct clk *clk, unsigned long control)

include/asm-avr32/arch-at32ap/board.h

@@ -8,6 +8,12 @@
 
 #define GPIO_PIN_NONE	(-1)
 
+/*
+ * Clock rates for various on-board oscillators. The number of entries
+ * in this array is chip-dependent.
+ */
+extern unsigned long at32_board_osc_rates[];
+  
 /* Add basic devices: system manager, interrupt controller, portmuxes, etc. */
 void at32_add_system_devices(void);