[AVR32] Add basic HMATRIX support
This adds register and clock definitions for the High-speed bus Matrix
(HMATRIX) as well as a function that can be used to configure special
EBI functionality like CompactFlash and NAND flash support.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
diff --git a/arch/avr32/mach-at32ap/at32ap7000.c b/arch/avr32/mach-at32ap/at32ap7000.c
index 472703f..32c7045 100644
--- a/arch/avr32/mach-at32ap/at32ap7000.c
+++ b/arch/avr32/mach-at32ap/at32ap7000.c
@@ -18,6 +18,7 @@
#include <asm/arch/sm.h>
#include "clock.h"
+#include "hmatrix.h"
#include "pio.h"
#include "sm.h"
@@ -467,6 +468,42 @@
};
/* --------------------------------------------------------------------
+ * HMATRIX
+ * -------------------------------------------------------------------- */
+
+static struct clk hmatrix_clk = {
+ .name = "hmatrix_clk",
+ .parent = &pbb_clk,
+ .mode = pbb_clk_mode,
+ .get_rate = pbb_clk_get_rate,
+ .index = 2,
+ .users = 1,
+};
+#define HMATRIX_BASE ((void __iomem *)0xfff00800)
+
+#define hmatrix_readl(reg) \
+ __raw_readl((HMATRIX_BASE) + HMATRIX_##reg)
+#define hmatrix_writel(reg,value) \
+ __raw_writel((value), (HMATRIX_BASE) + HMATRIX_##reg)
+
+/*
+ * Set bits in the HMATRIX Special Function Register (SFR) used by the
+ * External Bus Interface (EBI). This can be used to enable special
+ * features like CompactFlash support, NAND Flash support, etc. on
+ * certain chipselects.
+ */
+static inline void set_ebi_sfr_bits(u32 mask)
+{
+ u32 sfr;
+
+ clk_enable(&hmatrix_clk);
+ sfr = hmatrix_readl(SFR4);
+ sfr |= mask;
+ hmatrix_writel(SFR4, sfr);
+ clk_disable(&hmatrix_clk);
+}
+
+/* --------------------------------------------------------------------
* PIO
* -------------------------------------------------------------------- */
@@ -950,6 +987,7 @@
&pbb_clk,
&at32_sm_pclk,
&at32_intc0_pclk,
+ &hmatrix_clk,
&ebi_clk,
&hramc_clk,
&smc0_pclk,