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Subject[PATCH v5 1/2] mfd: Add anatop mfd driver
Date
From: "Ying-Chun Liu (PaulLiu)" <paul.liu@linaro.org>

Anatop is a mfd chip embedded in Freescale i.MX6Q SoC.
Anatop provides regulators and thermal.
This driver handles the address space and the operation of the mfd device.

Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
---
drivers/mfd/Kconfig | 6 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/anatop-mfd.c | 144 ++++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/anatop.h | 40 ++++++++++++
4 files changed, 191 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/anatop-mfd.c
create mode 100644 include/linux/mfd/anatop.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f147395..f787d17 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -830,6 +830,12 @@ config MFD_INTEL_MSIC
Passage) chip. This chip embeds audio, battery, GPIO, etc.
devices used in Intel Medfield platforms.

+config MFD_ANATOP
+ bool "Support for Anatop"
+ depends on SOC_IMX6Q
+ help
+ Select this option to enable Anatop MFD driver.
+
endmenu
endif

diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index b953bab..8e11060 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -112,3 +112,4 @@ obj-$(CONFIG_TPS65911_COMPARATOR) += tps65911-comparator.o
obj-$(CONFIG_MFD_AAT2870_CORE) += aat2870-core.o
obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o
obj-$(CONFIG_MFD_S5M_CORE) += s5m-core.o s5m-irq.o
+obj-$(CONFIG_MFD_ANATOP) += anatop-mfd.o
diff --git a/drivers/mfd/anatop-mfd.c b/drivers/mfd/anatop-mfd.c
new file mode 100644
index 0000000..86e2b8e
--- /dev/null
+++ b/drivers/mfd/anatop-mfd.c
@@ -0,0 +1,144 @@
+/*
+ * Anatop MFD driver
+ *
+ * Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
+ * Copyright (C) 2012 Linaro
+ *
+ * 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.
+ * 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/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/mfd/anatop.h>
+
+u32 anatop_get_bits(struct anatop *adata, u32 addr, int bit_shift, int bits)
+{
+ u32 val;
+ int mask;
+
+ if (bits == 32)
+ mask = ~0;
+ else
+ mask = (1 << bits) - 1;
+
+ spin_lock(&adata->reglock);
+ val = readl(adata->ioreg + addr);
+ spin_unlock(&adata->reglock);
+ val = (val >> bit_shift) & mask;
+
+ return val;
+}
+EXPORT_SYMBOL(anatop_get_bits);
+
+void anatop_set_bits(struct anatop *adata, u32 addr, int bit_shift,
+ int bits, u32 data)
+{
+ u32 val;
+ int mask;
+ if (bits == 32)
+ mask = ~0;
+ else
+ mask = (1 << bits) - 1;
+
+ spin_lock(&adata->reglock);
+ val = readl(adata->ioreg + addr) & ~(mask << bit_shift);
+ writel((data << bit_shift) | val, adata->ioreg);
+ spin_unlock(&adata->reglock);
+}
+EXPORT_SYMBOL(anatop_set_bits);
+
+static const struct of_device_id of_anatop_subdevice_match[] = {
+ { .compatible = "fsl,anatop-regulator", },
+ { .compatible = "fsl,anatop-thermal", },
+ { },
+};
+
+static int of_anatop_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ void *ioreg;
+ struct anatop *drvdata;
+
+ ioreg = of_iomap(np, 0);
+ if (!ioreg)
+ return -EINVAL;
+ drvdata = devm_kzalloc(dev, sizeof(struct anatop), GFP_KERNEL);
+ if (!drvdata)
+ return -EINVAL;
+ drvdata->ioreg = ioreg;
+ spin_lock_init(&drvdata->reglock);
+ platform_set_drvdata(pdev, drvdata);
+ of_platform_bus_probe(np, of_anatop_subdevice_match, dev);
+
+ return 0;
+}
+
+static int of_anatop_remove(struct platform_device *pdev)
+{
+ struct anatop *drvdata;
+ drvdata = platform_get_drvdata(pdev);
+ iounmap(drvdata->ioreg);
+ return 0;
+}
+
+static const struct of_device_id of_anatop_match[] = {
+ { .compatible = "fsl,imx6q-anatop", },
+ { },
+};
+
+static struct platform_driver anatop_of_driver = {
+ .driver = {
+ .name = "anatop-mfd",
+ .owner = THIS_MODULE,
+ .of_match_table = of_anatop_match,
+ },
+ .probe = of_anatop_probe,
+ .remove = of_anatop_remove,
+};
+
+static int __init anatop_init(void)
+{
+ return platform_driver_register(&anatop_of_driver);
+}
+postcore_initcall(anatop_init);
+
+static void __exit anatop_exit(void)
+{
+ platform_driver_unregister(&anatop_of_driver);
+}
+module_exit(anatop_exit);
+
+MODULE_AUTHOR("Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>");
+MODULE_DESCRIPTION("ANATOP MFD driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/anatop.h b/include/linux/mfd/anatop.h
new file mode 100644
index 0000000..22c1007
--- /dev/null
+++ b/include/linux/mfd/anatop.h
@@ -0,0 +1,40 @@
+/*
+ * anatop.h - Anatop MFD driver
+ *
+ * Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
+ * Copyright (C) 2012 Linaro
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __LINUX_MFD_ANATOP_H
+#define __LINUX_MFD_ANATOP_H
+
+#include <linux/spinlock.h>
+
+/**
+ * anatop - MFD data
+ * @ioreg: ioremap register
+ * @reglock: spinlock for register read/write
+ */
+struct anatop {
+ void *ioreg;
+ spinlock_t reglock;
+};
+
+extern u32 anatop_get_bits(struct anatop *, u32, int, int);
+extern void anatop_set_bits(struct anatop *, u32, int, int, u32);
+
+#endif /* __LINUX_MFD_ANATOP_H */
--
1.7.9


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