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-rw-r--r--arch/arm/mach-imx/anatop.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/anatop.c b/arch/arm/mach-imx/anatop.c
new file mode 100644
index 000000000000..0cfa07dd9aa4
--- /dev/null
+++ b/arch/arm/mach-imx/anatop.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2013 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include "common.h"
+
+#define REG_SET 0x4
+#define REG_CLR 0x8
+
+#define ANADIG_REG_2P5 0x130
+#define ANADIG_REG_CORE 0x140
+#define ANADIG_ANA_MISC0 0x150
+#define ANADIG_USB1_CHRG_DETECT 0x1b0
+#define ANADIG_USB2_CHRG_DETECT 0x210
+#define ANADIG_DIGPROG 0x260
+
+#define BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG 0x40000
+#define BM_ANADIG_REG_CORE_FET_ODRIVE 0x20000000
+#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG 0x1000
+#define BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B 0x80000
+#define BM_ANADIG_USB_CHRG_DETECT_EN_B 0x100000
+
+static struct regmap *anatop;
+
+static void imx_anatop_enable_weak2p5(bool enable)
+{
+ u32 reg, val;
+
+ regmap_read(anatop, ANADIG_ANA_MISC0, &val);
+
+ /* can only be enabled when stop_mode_config is clear. */
+ reg = ANADIG_REG_2P5;
+ reg += (enable && (val & BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG) == 0) ?
+ REG_SET : REG_CLR;
+ regmap_write(anatop, reg, BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG);
+}
+
+static void imx_anatop_enable_fet_odrive(bool enable)
+{
+ regmap_write(anatop, ANADIG_REG_CORE + (enable ? REG_SET : REG_CLR),
+ BM_ANADIG_REG_CORE_FET_ODRIVE);
+}
+
+void imx_anatop_pre_suspend(void)
+{
+ imx_anatop_enable_weak2p5(true);
+ imx_anatop_enable_fet_odrive(true);
+}
+
+void imx_anatop_post_resume(void)
+{
+ imx_anatop_enable_fet_odrive(false);
+ imx_anatop_enable_weak2p5(false);
+}
+
+void imx_anatop_usb_chrg_detect_disable(void)
+{
+ regmap_write(anatop, ANADIG_USB1_CHRG_DETECT,
+ BM_ANADIG_USB_CHRG_DETECT_EN_B
+ | BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B);
+ regmap_write(anatop, ANADIG_USB2_CHRG_DETECT,
+ BM_ANADIG_USB_CHRG_DETECT_EN_B |
+ BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B);
+}
+
+u32 imx_anatop_get_digprog(void)
+{
+ struct device_node *np;
+ void __iomem *anatop_base;
+ static u32 digprog;
+
+ if (digprog)
+ return digprog;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-anatop");
+ anatop_base = of_iomap(np, 0);
+ WARN_ON(!anatop_base);
+ digprog = readl_relaxed(anatop_base + ANADIG_DIGPROG);
+
+ return digprog;
+}
+
+void __init imx_anatop_init(void)
+{
+ anatop = syscon_regmap_lookup_by_compatible("fsl,imx6q-anatop");
+ if (IS_ERR(anatop)) {
+ pr_err("%s: failed to find imx6q-anatop regmap!\n", __func__);
+ return;
+ }
+}