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Message-Id: <1324458211-1612-1-git-send-email-paul.liu@linaro.org>
Date: Wed, 21 Dec 2011 17:03:31 +0800
From: "Ying-Chun Liu (PaulLiu)" <paul.liu@...aro.org>
To: linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org
Cc: patches@...aro.org, eric.miao@...aro.org,
broonie@...nsource.wolfsonmicro.com,
"Ying-Chun Liu (PaulLiu)" <paul.liu@...aro.org>,
Nancy Chen <Nancy.Chen@...escale.com>,
Liam Girdwood <lrg@...com>
Subject: [PATCHv2] Regulator: Add Anatop regulator driver
From: "Ying-Chun Liu (PaulLiu)" <paul.liu@...aro.org>
Anatop regulator driver is used by i.MX6 SoC. The regulator provides
controlling the voltage of PU, CORE, SOC, and some devices. This patch
adds the Anatop regulator driver.
Signed-off-by: Nancy Chen <Nancy.Chen@...escale.com>
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@...aro.org>
Cc: Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@...com>
---
drivers/regulator/Kconfig | 7 +
drivers/regulator/Makefile | 1 +
drivers/regulator/anatop-regulator.c | 260 ++++++++++++++++++++++++++++
include/linux/regulator/anatop-regulator.h | 67 +++++++
4 files changed, 335 insertions(+), 0 deletions(-)
create mode 100644 drivers/regulator/anatop-regulator.c
create mode 100644 include/linux/regulator/anatop-regulator.h
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 9713b1b..6aebd6d 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -327,5 +327,12 @@ config REGULATOR_AAT2870
If you have a AnalogicTech AAT2870 say Y to enable the
regulator driver.
+config REGULATOR_ANATOP
+ tristate "ANATOP LDO regulators"
+ depends on SOC_IMX6
+ default y if SOC_IMX6
+ help
+ Say y here to support ANATOP LDOs regulators.
+
endif
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 93a6318..990c332 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -46,5 +46,6 @@ obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o
obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o
obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o
+obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o
ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/anatop-regulator.c b/drivers/regulator/anatop-regulator.c
new file mode 100644
index 0000000..31156d5
--- /dev/null
+++ b/drivers/regulator/anatop-regulator.c
@@ -0,0 +1,260 @@
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/anatop-regulator.h>
+
+static int anatop_set_voltage(struct regulator_dev *reg, int min_uV,
+ int max_uV, unsigned *selector)
+{
+ struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg);
+ u32 val, rega;
+ int uv;
+
+ uv = max_uV;
+ pr_debug("%s: uv %d, min %d, max %d\n", __func__,
+ uv, reg->constraints->min_uV,
+ reg->constraints->max_uV);
+
+ if (uv < reg->constraints->min_uV || uv > reg->constraints->max_uV)
+ return -EINVAL;
+
+ if (anatop_reg->rdata->control_reg) {
+ val = anatop_reg->rdata->min_bit_val +
+ (uv - reg->constraints->min_uV) / 25000;
+ rega = (__raw_readl(anatop_reg->rdata->control_reg) &
+ ~(anatop_reg->rdata->vol_bit_mask <<
+ anatop_reg->rdata->vol_bit_shift));
+ pr_debug("%s: calculated val %d\n", __func__, val);
+ __raw_writel((val << anatop_reg->rdata->vol_bit_shift) | rega,
+ anatop_reg->rdata->control_reg);
+ return 0;
+ } else {
+ pr_debug("Regulator not supported.\n");
+ return -ENOTSUPP;
+ }
+}
+
+static int anatop_get_voltage(struct regulator_dev *reg)
+{
+ struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg);
+ int uv;
+ struct anatop_regulator_data *rdata = anatop_reg->rdata;
+
+ if (rdata->control_reg) {
+ u32 val = (__raw_readl(rdata->control_reg) <<
+ rdata->vol_bit_shift) & rdata->vol_bit_mask;
+ uv = reg->constraints->min_uV
+ + (val - rdata->min_bit_val) * 25000;
+ pr_debug("vddio = %d, val=%u\n", uv, val);
+ return uv;
+ } else {
+ pr_debug("Regulator not supported.\n");
+ return -ENOTSUPP;
+ }
+}
+
+static int anatop_enable(struct regulator_dev *reg)
+{
+ return 0;
+}
+
+static int anatop_disable(struct regulator_dev *reg)
+{
+ return 0;
+}
+
+static int anatop_is_enabled(struct regulator_dev *reg)
+{
+ return 1;
+}
+
+static struct regulator_ops anatop_rops = {
+ .set_voltage = anatop_set_voltage,
+ .get_voltage = anatop_get_voltage,
+ .enable = anatop_enable,
+ .disable = anatop_disable,
+ .is_enabled = anatop_is_enabled,
+};
+
+static struct regulator_desc anatop_reg_desc[] = {
+ {
+ .name = "vddpu",
+ .id = ANATOP_VDDPU,
+ .ops = &anatop_rops,
+ .irq = 0,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE
+ },
+ {
+ .name = "vddcore",
+ .id = ANATOP_VDDCORE,
+ .ops = &anatop_rops,
+ .irq = 0,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE
+ },
+ {
+ .name = "vddsoc",
+ .id = ANATOP_VDDSOC,
+ .ops = &anatop_rops,
+ .irq = 0,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE
+ },
+ {
+ .name = "vdd2p5",
+ .id = ANATOP_VDD2P5,
+ .ops = &anatop_rops,
+ .irq = 0,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE
+ },
+ {
+ .name = "vdd1p1",
+ .id = ANATOP_VDD1P1,
+ .ops = &anatop_rops,
+ .irq = 0,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE
+ },
+ {
+ .name = "vdd3p0",
+ .id = ANATOP_VDD3P0,
+ .ops = &anatop_rops,
+ .irq = 0,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE
+ },
+};
+
+int anatop_regulator_probe(struct platform_device *pdev)
+{
+ struct regulator_desc *rdesc;
+ struct regulator_dev *rdev;
+ struct anatop_regulator *sreg;
+ struct regulator_init_data *initdata;
+
+ sreg = platform_get_drvdata(pdev);
+ initdata = pdev->dev.platform_data;
+ sreg->cur_current = 0;
+ sreg->next_current = 0;
+ sreg->cur_voltage = 0;
+
+ init_waitqueue_head(&sreg->wait_q);
+ spin_lock_init(&sreg->lock);
+
+ if (pdev->id > ANATOP_SUPPLY_NUM) {
+ rdesc = kzalloc(sizeof(struct regulator_desc), GFP_KERNEL);
+ memcpy(rdesc, &anatop_reg_desc[ANATOP_SUPPLY_NUM],
+ sizeof(struct regulator_desc));
+ rdesc->name = kstrdup(sreg->rdata->name, GFP_KERNEL);
+ } else
+ rdesc = &anatop_reg_desc[pdev->id];
+
+ pr_debug("probing regulator %s %s %d\n",
+ sreg->rdata->name,
+ rdesc->name,
+ pdev->id);
+
+ /* register regulator */
+ rdev = regulator_register(rdesc, &pdev->dev,
+ initdata, sreg);
+
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev, "failed to register %s\n",
+ rdesc->name);
+ return PTR_ERR(rdev);
+ }
+
+ return 0;
+}
+
+
+int anatop_regulator_remove(struct platform_device *pdev)
+{
+ struct regulator_dev *rdev = platform_get_drvdata(pdev);
+
+ regulator_unregister(rdev);
+
+ return 0;
+
+}
+
+int anatop_register_regulator(
+ struct anatop_regulator *reg_data, int reg,
+ struct regulator_init_data *initdata)
+{
+ struct platform_device *pdev;
+ int ret;
+
+ pdev = platform_device_alloc("anatop_reg", reg);
+ if (!pdev)
+ return -ENOMEM;
+
+ pdev->dev.platform_data = initdata;
+
+ platform_set_drvdata(pdev, reg_data);
+ ret = platform_device_add(pdev);
+
+ if (ret != 0) {
+ pr_debug("Failed to register regulator %d: %d\n",
+ reg, ret);
+ platform_device_del(pdev);
+ }
+ pr_debug("register regulator %s, %d: %d\n",
+ reg_data->rdata->name, reg, ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(anatop_register_regulator);
+
+struct platform_driver anatop_reg = {
+ .driver = {
+ .name = "anatop_reg",
+ },
+ .probe = anatop_regulator_probe,
+ .remove = anatop_regulator_remove,
+};
+
+int anatop_regulator_init(void)
+{
+ return platform_driver_register(&anatop_reg);
+}
+
+void anatop_regulator_exit(void)
+{
+ platform_driver_unregister(&anatop_reg);
+}
+
+postcore_initcall(anatop_regulator_init);
+module_exit(anatop_regulator_exit);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("ANATOP Regulator driver");
+MODULE_LICENSE("GPL");
+
diff --git a/include/linux/regulator/anatop-regulator.h b/include/linux/regulator/anatop-regulator.h
new file mode 100644
index 0000000..70f096b
--- /dev/null
+++ b/include/linux/regulator/anatop-regulator.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __ANATOP_REGULATOR_H
+#define __ANATOP_REGULATOR_H
+#include <linux/regulator/driver.h>
+
+/* regulator supplies for Anatop */
+enum anatop_regulator_supplies {
+ ANATOP_VDDPU,
+ ANATOP_VDDCORE,
+ ANATOP_VDDSOC,
+ ANATOP_VDD2P5,
+ ANATOP_VDD1P1,
+ ANATOP_VDD3P0,
+ ANATOP_SUPPLY_NUM
+};
+
+struct anatop_regulator {
+ struct regulator_desc regulator;
+ struct anatop_regulator *parent;
+ struct anatop_regulator_data *rdata;
+ struct completion done;
+
+ spinlock_t lock;
+ wait_queue_head_t wait_q;
+ struct notifier_block nb;
+
+ int mode;
+ int cur_voltage;
+ int cur_current;
+ int next_current;
+};
+
+
+struct anatop_regulator_data {
+ char name[80];
+ char *parent_name;
+
+ u32 control_reg;
+ int vol_bit_shift;
+ int vol_bit_mask;
+ int min_bit_val;
+};
+
+int anatop_register_regulator(
+ struct anatop_regulator *reg_data, int reg,
+ struct regulator_init_data *initdata);
+
+#endif /* __ANATOP_REGULATOR_H */
--
1.7.7.3
--
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