Add a basic low-level pad configuration function that can be used to
implement early boot pin configuration code as well as shared with
various iomuxv3 and vf610 drivers.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
arch/arm/mach-imx/include/mach/iomux-v3.h | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/arch/arm/mach-imx/include/mach/iomux-v3.h b/arch/arm/mach-imx/include/mach/iomux-v3.h
index b8cc9af..3bf457f 100644
--- a/arch/arm/mach-imx/include/mach/iomux-v3.h
+++ b/arch/arm/mach-imx/include/mach/iomux-v3.h
@@ -16,6 +16,8 @@
#ifndef __MACH_IOMUX_V3_H__
#define __MACH_IOMUX_V3_H__
+#include <io.h>
+
/*
* build IOMUX_PAD structure
*
@@ -104,6 +106,32 @@ typedef u64 iomux_v3_cfg_t;
#define IOMUX_CONFIG_SION (0x1 << 4)
+#define SHARE_MUX_CONF_REG 0x1
+#define ZERO_OFFSET_VALID 0x2
+
+static inline void iomux_v3_setup_pad(void __iomem *iomux, unsigned int flags,
+ u32 mux_reg, u32 conf_reg, u32 input_reg,
+ u32 mux_val, u32 conf_val, u32 input_val)
+{
+ const bool mux_ok = !!mux_reg || (flags & ZERO_OFFSET_VALID);
+ const bool conf_ok = !!conf_reg;
+ const bool input_ok = !!input_reg;
+
+ if (flags & SHARE_MUX_CONF_REG) {
+ mux_val |= conf_val;
+ } else {
+ if (conf_ok)
+ writel(conf_val, iomux + conf_reg);
+ }
+
+ if (mux_ok)
+ writel(mux_val, iomux + mux_reg);
+
+ if (input_ok)
+ writel(input_val, iomux + input_reg);
+}
+
+
/*
* setups a single pad in the iomuxer
*/
--
2.9.3
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