diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/power/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/avs/smartreflex.c | 54 | ||||
| -rw-r--r-- | drivers/power/power_supply_core.c | 2 | ||||
| -rw-r--r-- | drivers/power/reset/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/power/reset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/reset/gpio-poweroff.c | 129 |
7 files changed, 166 insertions, 38 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index 263499f8709a..9f45e2f77d53 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -346,6 +346,8 @@ config AB8500_BM help Say Y to include support for AB8500 battery management. +source "drivers/power/reset/Kconfig" + endif # POWER_SUPPLY source "drivers/power/avs/Kconfig" diff --git a/drivers/power/Makefile b/drivers/power/Makefile index 696e3a960b3e..22c8913382c0 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -51,3 +51,4 @@ obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o obj-$(CONFIG_POWER_AVS) += avs/ obj-$(CONFIG_CHARGER_SMB347) += smb347-charger.o +obj-$(CONFIG_POWER_RESET) += reset/ diff --git a/drivers/power/avs/smartreflex.c b/drivers/power/avs/smartreflex.c index d0fed2c5cf2c..a17d08411723 100644 --- a/drivers/power/avs/smartreflex.c +++ b/drivers/power/avs/smartreflex.c @@ -130,24 +130,21 @@ static irqreturn_t sr_interrupt(int irq, void *data) static void sr_set_clk_length(struct omap_sr *sr) { - struct clk *sys_ck; - u32 sys_clk_speed; + struct clk *fck; + u32 fclk_speed; - if (cpu_is_omap34xx()) - sys_ck = clk_get(NULL, "sys_ck"); - else - sys_ck = clk_get(NULL, "sys_clkin_ck"); + fck = clk_get(&sr->pdev->dev, "fck"); - if (IS_ERR(sys_ck)) { - dev_err(&sr->pdev->dev, "%s: unable to get sys clk\n", - __func__); + if (IS_ERR(fck)) { + dev_err(&sr->pdev->dev, "%s: unable to get fck for device %s\n", + __func__, dev_name(&sr->pdev->dev)); return; } - sys_clk_speed = clk_get_rate(sys_ck); - clk_put(sys_ck); + fclk_speed = clk_get_rate(fck); + clk_put(fck); - switch (sys_clk_speed) { + switch (fclk_speed) { case 12000000: sr->clk_length = SRCLKLENGTH_12MHZ_SYSCLK; break; @@ -164,34 +161,12 @@ static void sr_set_clk_length(struct omap_sr *sr) sr->clk_length = SRCLKLENGTH_38MHZ_SYSCLK; break; default: - dev_err(&sr->pdev->dev, "%s: Invalid sysclk value: %d\n", - __func__, sys_clk_speed); + dev_err(&sr->pdev->dev, "%s: Invalid fclk rate: %d\n", + __func__, fclk_speed); break; } } -static void sr_set_regfields(struct omap_sr *sr) -{ - /* - * For time being these values are defined in smartreflex.h - * and populated during init. May be they can be moved to board - * file or pmic specific data structure. In that case these structure - * fields will have to be populated using the pdata or pmic structure. - */ - if (cpu_is_omap34xx() || cpu_is_omap44xx()) { - sr->err_weight = OMAP3430_SR_ERRWEIGHT; - sr->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT; - sr->accum_data = OMAP3430_SR_ACCUMDATA; - if (!(strcmp(sr->name, "smartreflex_mpu_iva"))) { - sr->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT; - sr->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT; - } else { - sr->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT; - sr->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT; - } - } -} - static void sr_start_vddautocomp(struct omap_sr *sr) { if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) { @@ -924,8 +899,14 @@ static int __init omap_sr_probe(struct platform_device *pdev) sr_info->nvalue_count = pdata->nvalue_count; sr_info->senn_mod = pdata->senn_mod; sr_info->senp_mod = pdata->senp_mod; + sr_info->err_weight = pdata->err_weight; + sr_info->err_maxlimit = pdata->err_maxlimit; + sr_info->accum_data = pdata->accum_data; + sr_info->senn_avgweight = pdata->senn_avgweight; + sr_info->senp_avgweight = pdata->senp_avgweight; sr_info->autocomp_active = false; sr_info->ip_type = pdata->ip_type; + sr_info->base = ioremap(mem->start, resource_size(mem)); if (!sr_info->base) { dev_err(&pdev->dev, "%s: ioremap fail\n", __func__); @@ -937,7 +918,6 @@ static int __init omap_sr_probe(struct platform_device *pdev) sr_info->irq = irq->start; sr_set_clk_length(sr_info); - sr_set_regfields(sr_info); list_add(&sr_info->node, &sr_list); diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c index f984da1066ec..8a7cfb3cc166 100644 --- a/drivers/power/power_supply_core.c +++ b/drivers/power/power_supply_core.c @@ -201,7 +201,7 @@ static int psy_register_thermal(struct power_supply *psy) for (i = 0; i < psy->num_properties; i++) { if (psy->properties[i] == POWER_SUPPLY_PROP_TEMP) { psy->tzd = thermal_zone_device_register(psy->name, 0, 0, - psy, &psy_tzd_ops, 0, 0); + psy, &psy_tzd_ops, NULL, 0, 0); if (IS_ERR(psy->tzd)) return PTR_ERR(psy->tzd); break; diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig new file mode 100644 index 000000000000..6461b489fb09 --- /dev/null +++ b/drivers/power/reset/Kconfig @@ -0,0 +1,15 @@ +menuconfig POWER_RESET + bool "Board level reset or power off" + help + Provides a number of drivers which either reset a complete board + or shut it down, by manipulating the main power supply on the board. + + Say Y here to enable board reset and power off + +config POWER_RESET_GPIO + bool "GPIO power-off driver" + depends on OF_GPIO && POWER_RESET + help + This driver supports turning off your board via a GPIO line. + If your board needs a GPIO high/low to power down, say Y and + create a binding in your devicetree. diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile new file mode 100644 index 000000000000..751488a4a0c5 --- /dev/null +++ b/drivers/power/reset/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o diff --git a/drivers/power/reset/gpio-poweroff.c b/drivers/power/reset/gpio-poweroff.c new file mode 100644 index 000000000000..0491e5335d02 --- /dev/null +++ b/drivers/power/reset/gpio-poweroff.c @@ -0,0 +1,129 @@ +/* + * Toggles a GPIO pin to power down a device + * + * Jamie Lentin <jm@lentin.co.uk> + * Andrew Lunn <andrew@lunn.ch> + * + * Copyright (C) 2012 Jamie Lentin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> +#include <linux/of_platform.h> +#include <linux/of_gpio.h> +#include <linux/module.h> + +/* + * Hold configuration here, cannot be more than one instance of the driver + * since pm_power_off itself is global. + */ +static int gpio_num = -1; +static int gpio_active_low; + +static void gpio_poweroff_do_poweroff(void) +{ + BUG_ON(gpio_num == -1); + + /* drive it active */ + gpio_direction_output(gpio_num, !gpio_active_low); + mdelay(100); + /* rising edge or drive inactive */ + gpio_set_value(gpio_num, gpio_active_low); + mdelay(100); + /* falling edge */ + gpio_set_value(gpio_num, !gpio_active_low); + + /* give it some time */ + mdelay(3000); + + WARN_ON(1); +} + +static int __devinit gpio_poweroff_probe(struct platform_device *pdev) +{ + enum of_gpio_flags flags; + bool input = false; + int ret; + + /* If a pm_power_off function has already been added, leave it alone */ + if (pm_power_off != NULL) { + pr_err("%s: pm_power_off function already registered", + __func__); + return -EBUSY; + } + + gpio_num = of_get_gpio_flags(pdev->dev.of_node, 0, &flags); + if (gpio_num < 0) { + pr_err("%s: Could not get GPIO configuration: %d", + __func__, gpio_num); + return -ENODEV; + } + gpio_active_low = flags & OF_GPIO_ACTIVE_LOW; + + if (of_get_property(pdev->dev.of_node, "input", NULL)) + input = true; + + ret = gpio_request(gpio_num, "poweroff-gpio"); + if (ret) { + pr_err("%s: Could not get GPIO %d", __func__, gpio_num); + return ret; + } + if (input) { + if (gpio_direction_input(gpio_num)) { + pr_err("Could not set direction of GPIO %d to input", + gpio_num); + goto err; + } + } else { + if (gpio_direction_output(gpio_num, gpio_active_low)) { + pr_err("Could not set direction of GPIO %d", gpio_num); + goto err; + } + } + + pm_power_off = &gpio_poweroff_do_poweroff; + return 0; + +err: + gpio_free(gpio_num); + return -ENODEV; +} + +static int __devexit gpio_poweroff_remove(struct platform_device *pdev) +{ + if (gpio_num != -1) + gpio_free(gpio_num); + if (pm_power_off == &gpio_poweroff_do_poweroff) + pm_power_off = NULL; + + return 0; +} + +static const struct of_device_id of_gpio_poweroff_match[] = { + { .compatible = "gpio-poweroff", }, + {}, +}; + +static struct platform_driver gpio_poweroff_driver = { + .probe = gpio_poweroff_probe, + .remove = __devexit_p(gpio_poweroff_remove), + .driver = { + .name = "poweroff-gpio", + .owner = THIS_MODULE, + .of_match_table = of_gpio_poweroff_match, + }, +}; + +module_platform_driver(gpio_poweroff_driver); + +MODULE_AUTHOR("Jamie Lentin <jm@lentin.co.uk>"); +MODULE_DESCRIPTION("GPIO poweroff driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:poweroff-gpio"); |