Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / avr32 / mach-at32ap / hmatrix.c

diff --git a/kernel/arch/avr32/mach-at32ap/hmatrix.c b/kernel/arch/avr32/mach-at32ap/hmatrix.c
new file mode 100644 (file)
index 0000000..48f5ede
--- /dev/null
+++ b/kernel/arch/avr32/mach-at32ap/hmatrix.c
@@ -0,0 +1,88 @@
+/*
+ * High-Speed Bus Matrix helper functions
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <mach/chip.h>
+#include <mach/hmatrix.h>
+
+static inline void __hmatrix_write_reg(unsigned long offset, u32 value)
+{
+       __raw_writel(value, (void __iomem __force *)(HMATRIX_BASE + offset));
+}
+
+static inline u32 __hmatrix_read_reg(unsigned long offset)
+{
+       return __raw_readl((void __iomem __force *)(HMATRIX_BASE + offset));
+}
+
+/**
+ * hmatrix_write_reg - write HMATRIX configuration register
+ * @offset: register offset
+ * @value: value to be written to the register at @offset
+ */
+void hmatrix_write_reg(unsigned long offset, u32 value)
+{
+       clk_enable(&at32_hmatrix_clk);
+       __hmatrix_write_reg(offset, value);
+       __hmatrix_read_reg(offset);
+       clk_disable(&at32_hmatrix_clk);
+}
+
+/**
+ * hmatrix_read_reg - read HMATRIX configuration register
+ * @offset: register offset
+ *
+ * Returns the value of the register at @offset.
+ */
+u32 hmatrix_read_reg(unsigned long offset)
+{
+       u32 value;
+
+       clk_enable(&at32_hmatrix_clk);
+       value = __hmatrix_read_reg(offset);
+       clk_disable(&at32_hmatrix_clk);
+
+       return value;
+}
+
+/**
+ * hmatrix_sfr_set_bits - set bits in a slave's Special Function Register
+ * @slave_id: operate on the SFR belonging to this slave
+ * @mask: mask of bits to be set in the SFR
+ */
+void hmatrix_sfr_set_bits(unsigned int slave_id, u32 mask)
+{
+       u32 value;
+
+       clk_enable(&at32_hmatrix_clk);
+       value = __hmatrix_read_reg(HMATRIX_SFR(slave_id));
+       value |= mask;
+       __hmatrix_write_reg(HMATRIX_SFR(slave_id), value);
+       __hmatrix_read_reg(HMATRIX_SFR(slave_id));
+       clk_disable(&at32_hmatrix_clk);
+}
+
+/**
+ * hmatrix_sfr_set_bits - clear bits in a slave's Special Function Register
+ * @slave_id: operate on the SFR belonging to this slave
+ * @mask: mask of bits to be cleared in the SFR
+ */
+void hmatrix_sfr_clear_bits(unsigned int slave_id, u32 mask)
+{
+       u32 value;
+
+       clk_enable(&at32_hmatrix_clk);
+       value = __hmatrix_read_reg(HMATRIX_SFR(slave_id));
+       value &= ~mask;
+       __hmatrix_write_reg(HMATRIX_SFR(slave_id), value);
+       __hmatrix_read_reg(HMATRIX_SFR(slave_id));
+       clk_disable(&at32_hmatrix_clk);
+}