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 Acked-by: Shawn Guo shawn.guo@linaro.org Cc: Samuel Ortiz sameo@linux.intel.com Cc: Mark Brown broonie@opensource.wolfsonmicro.com Cc: Venu Byravarasu vbyravarasu@nvidia.com Cc: Peter Korsgaard jacmet@sunsite.dk --- drivers/mfd/Kconfig | 8 +++ drivers/mfd/Makefile | 1 + drivers/mfd/anatop-mfd.c | 142 ++++++++++++++++++++++++++++++++++++++++++++ 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..f7e2f61 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -830,6 +830,14 @@ 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 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 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..d9bc63c --- /dev/null +++ b/drivers/mfd/anatop-mfd.c @@ -0,0 +1,142 @@ +/* + * 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(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); + 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 __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_bus_probe(np, of_anatop_subdevice_match, 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 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 */