mfd: Add anatop mfd driver

Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Venu Byravarasu <vbyravarasu@nvidia.com>
Cc: Peter Korsgaard <jacmet@sunsite.dk>
Cc: Rob Lee <rob.lee@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 0f59396..a5f4176 100644 (file)
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -860,6 +860,14 @@ config MFD_RC5T583
          Additional drivers must be enabled in order to use the
          different functionality of the device.
 
+config MFD_ANATOP
+       bool "Support for Freescale i.MX on-chip ANATOP controller"
+       depends on SOC_IMX6Q
+       help
+         Select this option to enable Freescale i.MX on-chip ANATOP
+         MFD controller. This controller embeds regulator and
+         thermal devices for Freescale i.MX platforms.
+
 endmenu
 endif
 

diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index ea0bb80..67f7b0e 100644 (file)
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -114,3 +114,4 @@ obj-$(CONFIG_MFD_AAT2870_CORE)      += aat2870-core.o
 obj-$(CONFIG_MFD_INTEL_MSIC)   += intel_msic.o
 obj-$(CONFIG_MFD_RC5T583)      += rc5t583.o rc5t583-irq.o
 obj-$(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 (file)
index 0000000..2af4248
--- /dev/null
+++ b/drivers/mfd/anatop-mfd.c
@@ -0,0 +1,137 @@
+/*
+ * 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 bit_width)
+{
+       u32 val, mask;
+
+       if (bit_width == 32)
+               mask = ~0;
+       else
+               mask = (1 << bit_width) - 1;
+
+       val = readl(adata->ioreg + addr);
+       val = (val >> bit_shift) & mask;
+
+       return val;
+}
+EXPORT_SYMBOL_GPL(anatop_get_bits);
+
+void anatop_set_bits(struct anatop *adata, u32 addr, int bit_shift,
+                    int bit_width, u32 data)
+{
+       u32 val, mask;
+
+       if (bit_width == 32)
+               mask = ~0;
+       else
+               mask = (1 << bit_width) - 1;
+
+       spin_lock(&adata->reglock);
+       val = readl(adata->ioreg + addr) & ~(mask << bit_shift);
+       writel((data << bit_shift) | val, adata->ioreg + addr);
+       spin_unlock(&adata->reglock);
+}
+EXPORT_SYMBOL_GPL(anatop_set_bits);
+
+static const struct of_device_id of_anatop_match[] = {
+       { .compatible = "fsl,imx6q-anatop", },
+       { },
+};
+
+static int __devinit 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 -EADDRNOTAVAIL;
+       drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
+       if (!drvdata)
+               return -ENOMEM;
+       drvdata->ioreg = ioreg;
+       spin_lock_init(&drvdata->reglock);
+       platform_set_drvdata(pdev, drvdata);
+       of_platform_populate(np, of_anatop_match, NULL, dev);
+
+       return 0;
+}
+
+static int __devexit of_anatop_remove(struct platform_device *pdev)
+{
+       struct anatop *drvdata;
+       drvdata = platform_get_drvdata(pdev);
+       iounmap(drvdata->ioreg);
+
+       return 0;
+}
+
+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 (file)
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 */