From: "Luis R. Rodriguez" <mcgrof@xxxxxxxxxxxxxxxx>
This is required by some drivers as of next-20130424.
commit fcf371ee5624cc87abac205cd0dad2432d7f0346
Author: Axel Lin <axel.lin@xxxxxxxxxx>
Date: Thu Apr 18 10:34:49 2013 +0800
regulator: core: Add regulator_map_voltage_ascend() API
A lot of regulator hardware has ascendant voltage list.
This patch adds regulator_map_voltage_ascend() and export it.
Drivers that have ascendant voltage list can use this as their map_voltage()
operation, this is more efficient than default regulator_map_voltage_iterate()
function.
Signed-off-by: Axel Lin <axel.lin@xxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxxxxxxxxxx>
---
backport/backport-include/linux/regulator/driver.h | 26 ++++++++
backport/compat/Makefile | 1 +
backport/compat/backport-3.10.c | 62 ++++++++++++++++++++
3 files changed, 89 insertions(+)
create mode 100644 backport/backport-include/linux/regulator/driver.h
create mode 100644 backport/compat/backport-3.10.c
diff --git a/backport/backport-include/linux/regulator/driver.h b/backport/backport-include/linux/regulator/driver.h
new file mode 100644
index 0000000..fbd9845
--- /dev/null
+++ b/backport/backport-include/linux/regulator/driver.h
@@ -0,0 +1,26 @@
+/*
+ * driver.h -- SoC Regulator driver support.
+ *
+ * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
+ *
+ * Author: Liam Girdwood <lrg@xxxxxxxxxxxxxxx>
+ *
+ * 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.
+ *
+ * Regulator Driver Interface.
+ */
+
+#ifndef __BACKPORT_LINUX_REGULATOR_DRIVER_H_
+#define __BACKPORT_LINUX_REGULATOR_DRIVER_H_
+
+#include <linux/version.h>
+#include_next <linux/regulator/driver.h>
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
+int regulator_map_voltage_ascend(struct regulator_dev *rdev,
+ int min_uV, int max_uV);
+#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0)) */
+
+#endif /* __BACKPORT_LINUX_REGULATOR_DRIVER_H_ */
diff --git a/backport/compat/Makefile b/backport/compat/Makefile
index 2ab3169..18df156 100644
--- a/backport/compat/Makefile
+++ b/backport/compat/Makefile
@@ -34,6 +34,7 @@ compat-$(CPTCFG_BACKPORT_KERNEL_3_6) += compat-3.6.o
compat-$(CPTCFG_BACKPORT_KERNEL_3_7) += compat-3.7.o
compat-$(CPTCFG_BACKPORT_KERNEL_3_8) += compat-3.8.o
compat-$(CPTCFG_BACKPORT_KERNEL_3_9) += compat-3.9.o
+compat-$(CPTCFG_BACKPORT_KERNEL_3_10) += backport-3.10.o
compat-$(CPTCFG_BACKPORT_BUILD_KFIFO) += kfifo.o
compat-$(CPTCFG_BACKPORT_BUILD_GENERIC_ATOMIC64) += compat_atomic.o
diff --git a/backport/compat/backport-3.10.c b/backport/compat/backport-3.10.c
new file mode 100644
index 0000000..69c3788
--- /dev/null
+++ b/backport/compat/backport-3.10.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2013 Luis R. Rodriguez <mcgrof@xxxxxxxxxxxxxxxx>
+ *
+ * Linux backport symbols for kernels 3.10.
+ *
+ * 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.
+ */
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/async.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/suspend.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/module.h>
+
+/**
+ * regulator_map_voltage_ascend - map_voltage() for ascendant voltage list
+ *
+ * @rdev: Regulator to operate on
+ * @min_uV: Lower bound for voltage
+ * @max_uV: Upper bound for voltage
+ *
+ * Drivers that have ascendant voltage list can use this as their
+ * map_voltage() operation.
+ */
+int regulator_map_voltage_ascend(struct regulator_dev *rdev,
+ int min_uV, int max_uV)
+{
+ int i, ret;
+
+ for (i = 0; i < rdev->desc->n_voltages; i++) {
+ ret = rdev->desc->ops->list_voltage(rdev, i);
+ if (ret < 0)
+ continue;
+
+ if (ret > max_uV)
+ break;
+
+ if (ret >= min_uV && ret <= max_uV)
+ return i;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend);
+
+#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0)) */
--
1.7.10.4
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