imx: iomux-v3: add imx7d support for iomuxc

* Add imx7d support for iomux controller
* imx7d has two iomux controllers iomuxc (0x3033000) and iomuxc-lpsr
  (0x302C0000) each conroller provides control and mux mode pad
  registers but shares iomuxc input select register with iomuxc-lpsr
  IOMUX_CONFIG_LPSR flag is used to properly set daisy chain settings
  for iomuxc-lpsr pads.
* Since mx7d introduces LPSR IOMUX pins, add new base to IOMUX v3
  driver for these LPSR pins.

Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Ye.Li <B37916@freescale.com>

arch/arm/imx-common/iomux-v3.c

@@ -41,6 +41,18 @@ void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
 	}
 #endif
 
+#ifdef CONFIG_IOMUX_LPSR
+	u32 lpsr = (pad & MUX_MODE_LPSR) >> MUX_MODE_SHIFT;
+
+	if (lpsr == IOMUX_CONFIG_LPSR) {
+		base = (void *)IOMUXC_LPSR_BASE_ADDR;
+		mux_mode &= ~IOMUX_CONFIG_LPSR;
+		/* set daisy chain sel_input */
+		if (sel_input_ofs)
+			sel_input_ofs += IOMUX_LPSR_SEL_INPUT_OFS;
+	}
+#endif
+
 	if (mux_ctrl_ofs)
 		__raw_writel(mux_mode, base + mux_ctrl_ofs);
 
@@ -55,6 +67,12 @@ void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
 	if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
 		__raw_writel(pad_ctrl, base + pad_ctrl_ofs);
 #endif
+
+#ifdef CONFIG_IOMUX_LPSR
+	if (lpsr == IOMUX_CONFIG_LPSR)
+		base = (void *)IOMUXC_BASE_ADDR;
+#endif
+
 }
 
 /* configures a list of pads within declared with IOMUX_PADS macro */

arch/arm/include/asm/arch-mx7/mx7-pins.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#ifndef __ASM_ARCH_MX7_PINS_H__
+#define __ASM_ARCH_MX7_PINS_H__
+
+#include <asm/imx-common/iomux-v3.h>
+
+#if defined(CONFIG_MX7D)
+#include "mx7d_pins.h"
+#elif defined(CONFIG_MX7S)
+#include "mx7s_pins.h"
+#else
+#error "Please select cpu"
+#endif	/* CONFIG_MX7D */
+
+#endif	/*__ASM_ARCH_MX7_PINS_H__ */

arch/arm/include/asm/imx-common/iomux-v3.h

@@ -85,6 +85,36 @@ typedef u64 iomux_v3_cfg_t;
 
 #define NO_PAD_CTRL		(1 << 17)
 
+#ifdef CONFIG_MX7
+
+#define IOMUX_LPSR_SEL_INPUT_OFS 0x70000
+#define IOMUX_CONFIG_LPSR       0x8
+#define MUX_MODE_LPSR           ((iomux_v3_cfg_t)IOMUX_CONFIG_LPSR << \
+				MUX_MODE_SHIFT)
+
+#define PAD_CTL_DSE_1P8V_140OHM   (0x0<<0)
+#define PAD_CTL_DSE_1P8V_35OHM    (0x1<<0)
+#define PAD_CTL_DSE_1P8V_70OHM    (0x2<<0)
+#define PAD_CTL_DSE_1P8V_23OHM    (0x3<<0)
+
+#define PAD_CTL_DSE_3P3V_196OHM   (0x0<<0)
+#define PAD_CTL_DSE_3P3V_49OHM    (0x1<<0)
+#define PAD_CTL_DSE_3P3V_98OHM    (0x2<<0)
+#define PAD_CTL_DSE_3P3V_32OHM    (0x3<<0)
+
+#define PAD_CTL_SRE_FAST     (0 << 2)
+#define PAD_CTL_SRE_SLOW     (0x1 << 2)
+
+#define PAD_CTL_HYS       (0x1 << 3)
+#define PAD_CTL_PUE       (0x1 << 4)
+
+#define PAD_CTL_PUS_PD100KOHM  ((0x0 << 5) | PAD_CTL_PUE)
+#define PAD_CTL_PUS_PU5KOHM    ((0x1 << 5) | PAD_CTL_PUE)
+#define PAD_CTL_PUS_PU47KOHM   ((0x2 << 5) | PAD_CTL_PUE)
+#define PAD_CTL_PUS_PU100KOHM  ((0x3 << 5) | PAD_CTL_PUE)
+
+#else
+
 #ifdef CONFIG_MX6
 
 #define PAD_CTL_HYS		(1 << 16)
@@ -173,6 +203,8 @@ typedef u64 iomux_v3_cfg_t;
 #define PAD_CTL_SRE_SLOW	(0 << 0)
 #define PAD_CTL_SRE_FAST	(1 << 0)
 
+#endif
+
 #define IOMUX_CONFIG_SION	0x10
 
 #define GPIO_PIN_MASK		0x1f