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 --- drivers/mfd/Kconfig | 6 ++ drivers/mfd/Makefile | 1 + drivers/mfd/anatop-mfd.c | 152 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/anatop.h | 39 +++++++++++ 4 files changed, 198 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 cd13e9f..4f71627 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..58c6054 --- /dev/null +++ b/drivers/mfd/anatop-mfd.c @@ -0,0 +1,152 @@ +/* + * 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> + +static u32 anatop_read(struct anatop *adata, u32 addr, int bit_shift, int bits) +{ + u32 val; + int mask; + if (bits == 32) + mask = 0xff; + else + mask = (1 << bits) - 1; + + val = ioread32(adata->ioreg+addr); + val = (val >> bit_shift) & mask; + return val; +} + +static void anatop_write(struct anatop *adata, u32 addr, int bit_shift, + int bits, u32 data) +{ + u32 val; + int mask; + if (bits == 32) + mask = 0xff; + else + mask = (1 << bits) - 1; + + val = ioread32(adata->ioreg+addr) & ~(mask << bit_shift); + iowrite32((data << bit_shift) | val, adata->ioreg); +} + +static const struct of_device_id of_anatop_regulator_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; + u64 ofaddr; + u64 ofsize; + void *ioreg; + struct anatop *drvdata; + int ret = 0; + const __be32 *rval; + + rval = of_get_address(np, 0, &ofsize, NULL); + if (rval) + ofaddr = be32_to_cpu(*rval); + else + return -EINVAL; + + ioreg = ioremap(ofaddr, ofsize); + if (!ioreg) + return -EINVAL; + drvdata = devm_kzalloc(dev, sizeof(struct anatop), GFP_KERNEL); + if (!drvdata) + return -EINVAL; + drvdata->ioreg = ioreg; + drvdata->read = anatop_read; + drvdata->write = anatop_write; + platform_set_drvdata(pdev, drvdata); + of_platform_bus_probe(np, of_anatop_regulator_match, dev); + return ret; +} + +static int of_anatop_remove(struct platform_device *pdev) +{ + 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) +{ + int ret; + ret = platform_driver_register(&anatop_of_driver); + return ret; +} + +static void __exit anatop_exit(void) +{ + platform_driver_unregister(&anatop_of_driver); +} + +postcore_initcall(anatop_init); +module_exit(anatop_exit); + +MODULE_AUTHOR("Ying-Chun Liu (PaulLiu)"); +MODULE_DESCRIPTION("ANATOP MFD driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/anatop.h b/include/linux/mfd/anatop.h new file mode 100644 index 0000000..4425538 --- /dev/null +++ b/include/linux/mfd/anatop.h @@ -0,0 +1,39 @@ +/* + * anatop.h - Anatop MFD driver + * + * Copyright (C) 2012 Ying-Chun Liu (PaulLiu) paulliu@debian.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 + +/** + * anatop - MFD data + * @ioreg: ioremap register + * @read: function to read bits from the device + * @write: function to write bits to the device + */ +struct anatop { + void *ioreg; + u32 (*read) (struct anatop *adata, u32 addr, int bit_shift, int bits); + void (*write) (struct anatop *adata, u32 addr, int bit_shift, + int bits, u32 data); + +}; + +#endif /* __LINUX_MFD_ANATOP_H */