From 9d49df739f7e3f99980d99af76e2279f0aa3b1e5 Mon Sep 17 00:00:00 2001 From: Peter 'p2' De Schrijver Date: Mon, 28 Jan 2008 18:46:58 +0200 Subject: [PATCH] OMAP34xx poweroff Add support for software controlled power off of omap34xx and TWL4030 based devices. Signed-off-by: Peter 'p2' De Schrijver Signed-off-by: Tony Lindgren --- drivers/i2c/chips/Kconfig | 5 ++ drivers/i2c/chips/Makefile | 1 + drivers/i2c/chips/twl4030_poweroff.c | 75 ++++++++++++++++++++++++++++ 3 files changed, 81 insertions(+) create mode 100644 drivers/i2c/chips/twl4030_poweroff.c diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig index 1f5eee65331..f8b4e54bbff 100644 --- a/drivers/i2c/chips/Kconfig +++ b/drivers/i2c/chips/Kconfig @@ -157,8 +157,13 @@ config TWL4030_USB_HS_ULPI help Say Y here if the TWL4030 is connected to high-speed USB controller through a ULPI interface. + endchoice +config TWL4030_POWEROFF + bool "TWL4030 device poweroff" + depends on TWL4030_CORE + config SENSORS_M41T00 tristate "ST M41T00 RTC chip (DEPRECATED)" depends on PPC32 diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile index 4a079df8b51..72a053d5359 100644 --- a/drivers/i2c/chips/Makefile +++ b/drivers/i2c/chips/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o obj-$(CONFIG_TWL4030_CORE) += twl4030_core.o obj-$(CONFIG_TWL4030_GPIO) += twl4030_gpio.o obj-$(CONFIG_TWL4030_USB) += twl4030_usb.o +obj-$(CONFIG_TWL4030_POWEROFF) += twl4030_poweroff.o obj-$(CONFIG_RTC_X1205_I2C) += x1205.o ifeq ($(CONFIG_I2C_DEBUG_CHIP),y) diff --git a/drivers/i2c/chips/twl4030_poweroff.c b/drivers/i2c/chips/twl4030_poweroff.c new file mode 100644 index 00000000000..7a176d98ab0 --- /dev/null +++ b/drivers/i2c/chips/twl4030_poweroff.c @@ -0,0 +1,75 @@ +/* + * linux/drivers/i2c/chips/twl4030_poweroff.c + * + * Power off device + * + * Copyright (C) 2008 Nokia Corporation + * + * Written by Peter De Schrijver + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 + */ + +#include +#include +#include + +#define PWR_P1_SW_EVENTS 0x10 +#define PWR_DEVOFF (1<<0) + +void twl4030_poweroff(void) +{ + u8 val; + int err; + + err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &val, + PWR_P1_SW_EVENTS); + if (err) { + printk(KERN_WARNING "I2C error %d while reading TWL4030" + "PM_MASTER P1_SW_EVENTS\n", err); + return ; + } + + val |= PWR_DEVOFF; + + err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, val, + PWR_P1_SW_EVENTS); + + if (err) { + printk(KERN_WARNING "I2C error %d while writing TWL4030" + "PM_MASTER P1_SW_EVENTS\n", err); + return ; + } + + return; +} + +static int __init twl4030_poweroff_init(void) +{ + pm_power_off = twl4030_poweroff; + + return 0; +} + +static void __exit twl4030_poweroff_exit(void) +{ + pm_power_off = NULL; +} + +module_init(twl4030_poweroff_init); +module_exit(twl4030_poweroff_exit); + +MODULE_DESCRIPTION("Triton2 device power off"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Peter De Schrijver"); -- 2.41.1