AVR32: Resource management rewrite

Rewrite the resource management code (i.e. I/O memory, clock gating,
gpio) so it doesn't depend on any global state. This is necessary
because this code is heavily used before relocation to RAM, so we
can't write to any global variables.

As an added bonus, this makes u-boot's memory footprint a bit smaller,
although some functionality has been left out; all clocks are enabled
all the time, and there's no checking for gpio line conflicts.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/include/asm-avr32/arch-at32ap7000/clk.h b/include/asm-avr32/arch-at32ap7000/clk.h
new file mode 100644
index 0000000..4a25b17
--- /dev/null
+++ b/include/asm-avr32/arch-at32ap7000/clk.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#ifndef __ASM_AVR32_ARCH_CLK_H__
+#define __ASM_AVR32_ARCH_CLK_H__
+
+#ifdef CONFIG_PLL
+#define MAIN_CLK_RATE ((CFG_OSC0_HZ / CFG_PLL0_DIV) * CFG_PLL0_MUL)
+#else
+#define MAIN_CLK_RATE (CFG_OSC0_HZ)
+#endif
+
+static inline unsigned long get_cpu_clk_rate(void)
+{
+	return MAIN_CLK_RATE >> CFG_CLKDIV_CPU;
+}
+static inline unsigned long get_hsb_clk_rate(void)
+{
+	return MAIN_CLK_RATE >> CFG_CLKDIV_HSB;
+}
+static inline unsigned long get_pba_clk_rate(void)
+{
+	return MAIN_CLK_RATE >> CFG_CLKDIV_PBA;
+}
+static inline unsigned long get_pbb_clk_rate(void)
+{
+	return MAIN_CLK_RATE >> CFG_CLKDIV_PBB;
+}
+
+/* Accessors for specific devices. More will be added as needed. */
+static inline unsigned long get_sdram_clk_rate(void)
+{
+	return get_hsb_clk_rate();
+}
+static inline unsigned long get_usart_clk_rate(unsigned int dev_id)
+{
+	return get_pba_clk_rate();
+}
+
+#endif /* __ASM_AVR32_ARCH_CLK_H__ */