power supply and reset changes for the v4.7 series
* alternative reset driver for new at91 SoCs * misc. fixes -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABCgAGBQJXPypDAAoJENju1/PIO/qav7MP/3jCiRTSLHIBsUE9AHQpX2hz t5MoG4OrIGFfsWHzq0M0I3fMWJv8ZBZ3eltT+giBoaGb9+t01p4sYydOCEnYbZXk xkp0yusMe11CYUbtyYgHpJaRLz1jziuvrHVb1HW1Kj6jzFmdDG19daUbPPyxnDA5 Qvp/5/D7vGhMjqikqFUqYWkGxot1SnQJeJ2cf5xp9WkENobGmMvLZlfxuO5ZW0ez LZgstS37pqlndwWfx3sdq+UDOnm5S07zGK4hCvj1Rv8a0zgMuvrrOF5vw/mBLoO/ r/MuX0feItqFT1kf2vUtD8im/UnSJvp0MGoNI4pzQQnYH0riQavegTMXPQG3cCeG ikxw2+b9iUER9N8Xwa25gt4IbgYg+YsVdtU60xRb18gu1AE+wIWCMC5Otxeh2+XR +AZa4/8TGqAp7pcT+uPA0KuOD8KcBo08OEYEX2GBDFTgo8zd7EOxFqo2ml0v+BxG DqAX1VsV6v/U6VuJegCUWSH1vvdIzbe8w45M7K9JtsZomoXWHRq6ffiLs4ytur1P 0T4wISBU8Mn98fpORFJW8E3iN0DSUrrORMwrbUgy/XmPmVAaByB2XBRQ5+yRGzyO lKHr68sNIOrqaXncjeLd1sWVVmaHC8VRueqMiQ/VkA+KXyb/zLeNUPP57xv6kcsD FJSLY6S4JC1eI+pJuaWc =NkO/ -----END PGP SIGNATURE----- Merge tag 'for-v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply Pull power supply and reset updates from Sebastian Reichel: - alternative reset driver for new at91 SoCs - misc fixes * tag 'for-v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: sbs-battery: fix power status when battery charging near dry power: ipaq-micro-battery: freeing the wrong variable power/max8925: freeing wrong variable power: reset: at91-shdwc: add new shutdown controller driver ARM: dts: at91: shdwc binding: add new shutdown controller documentation
This commit is contained in:
Linus Torvalds
commit
7992893c5a
8 changed files with 361 additions and 10 deletions
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@ -151,6 +151,65 @@ Example:
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clocks = <&clk32k>;
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};
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SHDWC SAMA5D2-Compatible Shutdown Controller
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1) shdwc node
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required properties:
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- compatible: should be "atmel,sama5d2-shdwc".
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- reg: should contain registers location and length
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- clocks: phandle to input clock.
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- #address-cells: should be one. The cell is the wake-up input index.
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- #size-cells: should be zero.
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optional properties:
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- debounce-delay-us: minimum wake-up inputs debouncer period in
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microseconds. It's usually a board-related property.
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- atmel,wakeup-rtc-timer: boolean to enable Real-Time Clock wake-up.
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The node contains child nodes for each wake-up input that the platform uses.
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2) input nodes
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Wake-up input nodes are usually described in the "board" part of the Device
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Tree. Note also that input 0 is linked to the wake-up pin and is frequently
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used.
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Required properties:
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- reg: should contain the wake-up input index [0 - 15].
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Optional properties:
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- atmel,wakeup-active-high: boolean, the corresponding wake-up input described
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by the child, forces the wake-up of the core power supply on a high level.
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The default is to be active low.
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Example:
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On the SoC side:
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shdwc@f8048010 {
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compatible = "atmel,sama5d2-shdwc";
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reg = <0xf8048010 0x10>;
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clocks = <&clk32k>;
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#address-cells = <1>;
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#size-cells = <0>;
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atmel,wakeup-rtc-timer;
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};
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On the board side:
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shdwc@f8048010 {
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debounce-delay-us = <976>;
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input@0 {
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reg = <0>;
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};
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input@1 {
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reg = <1>;
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atmel,wakeup-active-high;
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};
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};
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Special Function Registers (SFR)
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Special Function Registers (SFR) manage specific aspects of the integrated
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@ -2048,6 +2048,11 @@ M: Nicolas Ferre <nicolas.ferre@atmel.com>
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S: Supported
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F: drivers/tty/serial/atmel_serial.c
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ATMEL AT91 SAMA5D2-Compatible Shutdown Controller
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M: Nicolas Ferre <nicolas.ferre@atmel.com>
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S: Supported
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F: drivers/power/reset/at91-sama5d2_shdwc.c
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ATMEL SAMA5D2 ADC DRIVER
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M: Ludovic Desroches <ludovic.desroches@atmel.com>
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L: linux-iio@vger.kernel.org
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@ -261,7 +261,7 @@ static int micro_batt_probe(struct platform_device *pdev)
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return 0;
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ac_err:
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power_supply_unregister(micro_ac_power);
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power_supply_unregister(micro_batt_power);
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batt_err:
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cancel_delayed_work_sync(&mb->update);
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destroy_workqueue(mb->wq);
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@ -540,14 +540,14 @@ static int max8925_power_probe(struct platform_device *pdev)
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info->usb = power_supply_register(&pdev->dev, &usb_desc, &psy_cfg);
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if (IS_ERR(info->usb)) {
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ret = PTR_ERR(info->usb);
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goto out_usb;
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goto out_unregister_ac;
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}
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info->usb->dev.parent = &pdev->dev;
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info->battery = power_supply_register(&pdev->dev, &battery_desc, NULL);
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if (IS_ERR(info->battery)) {
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ret = PTR_ERR(info->battery);
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goto out_battery;
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goto out_unregister_usb;
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}
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info->battery->dev.parent = &pdev->dev;
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@ -560,9 +560,9 @@ static int max8925_power_probe(struct platform_device *pdev)
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max8925_init_charger(chip, info);
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return 0;
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out_battery:
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power_supply_unregister(info->battery);
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out_usb:
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out_unregister_usb:
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power_supply_unregister(info->usb);
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out_unregister_ac:
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power_supply_unregister(info->ac);
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out:
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return ret;
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@ -30,6 +30,14 @@ config POWER_RESET_AT91_RESET
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This driver supports restart for Atmel AT91SAM9 and SAMA5
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SoCs
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config POWER_RESET_AT91_SAMA5D2_SHDWC
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tristate "Atmel AT91 SAMA5D2-Compatible shutdown controller driver"
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depends on ARCH_AT91 || COMPILE_TEST
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default SOC_SAMA5
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help
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This driver supports the alternate shutdown controller for some Atmel
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SAMA5 SoCs. It is present for example on SAMA5D2 SoC.
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config POWER_RESET_AXXIA
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bool "LSI Axxia reset driver"
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depends on ARCH_AXXIA
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@ -1,6 +1,7 @@
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obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o
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obj-$(CONFIG_POWER_RESET_AT91_POWEROFF) += at91-poweroff.o
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obj-$(CONFIG_POWER_RESET_AT91_RESET) += at91-reset.o
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obj-$(CONFIG_POWER_RESET_AT91_SAMA5D2_SHDWC) += at91-sama5d2_shdwc.o
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obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o
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obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
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obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
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282
drivers/power/reset/at91-sama5d2_shdwc.c
Normal file
282
drivers/power/reset/at91-sama5d2_shdwc.c
Normal file
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@ -0,0 +1,282 @@
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/*
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* Atmel SAMA5D2-Compatible Shutdown Controller (SHDWC) driver.
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* Found on some SoCs as the sama5d2 (obviously).
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*
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* Copyright (C) 2015 Atmel Corporation,
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* Nicolas Ferre <nicolas.ferre@atmel.com>
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*
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* Evolved from driver at91-poweroff.c.
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*
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* TODO:
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* - addition to status of other wake-up inputs [1 - 15]
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* - Analog Comparator wake-up alarm
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* - Serial RX wake-up alarm
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* - low power debouncer
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*/
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/printk.h>
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#define SLOW_CLOCK_FREQ 32768
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#define AT91_SHDW_CR 0x00 /* Shut Down Control Register */
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#define AT91_SHDW_SHDW BIT(0) /* Shut Down command */
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#define AT91_SHDW_KEY (0xa5UL << 24) /* KEY Password */
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#define AT91_SHDW_MR 0x04 /* Shut Down Mode Register */
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#define AT91_SHDW_WKUPDBC_SHIFT 24
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#define AT91_SHDW_WKUPDBC_MASK GENMASK(31, 16)
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#define AT91_SHDW_WKUPDBC(x) (((x) << AT91_SHDW_WKUPDBC_SHIFT) \
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& AT91_SHDW_WKUPDBC_MASK)
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#define AT91_SHDW_SR 0x08 /* Shut Down Status Register */
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#define AT91_SHDW_WKUPIS_SHIFT 16
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#define AT91_SHDW_WKUPIS_MASK GENMASK(31, 16)
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#define AT91_SHDW_WKUPIS(x) ((1 << (x)) << AT91_SHDW_WKUPIS_SHIFT \
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& AT91_SHDW_WKUPIS_MASK)
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#define AT91_SHDW_WUIR 0x0c /* Shutdown Wake-up Inputs Register */
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#define AT91_SHDW_WKUPEN_MASK GENMASK(15, 0)
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#define AT91_SHDW_WKUPEN(x) ((1 << (x)) & AT91_SHDW_WKUPEN_MASK)
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#define AT91_SHDW_WKUPT_SHIFT 16
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#define AT91_SHDW_WKUPT_MASK GENMASK(31, 16)
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#define AT91_SHDW_WKUPT(x) ((1 << (x)) << AT91_SHDW_WKUPT_SHIFT \
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& AT91_SHDW_WKUPT_MASK)
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#define SHDW_WK_PIN(reg, cfg) ((reg) & AT91_SHDW_WKUPIS((cfg)->wkup_pin_input))
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#define SHDW_RTCWK(reg, cfg) (((reg) >> ((cfg)->sr_rtcwk_shift)) & 0x1)
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#define SHDW_RTCWKEN(cfg) (1 << ((cfg)->mr_rtcwk_shift))
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#define DBC_PERIOD_US(x) DIV_ROUND_UP_ULL((1000000 * (x)), \
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SLOW_CLOCK_FREQ)
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struct shdwc_config {
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u8 wkup_pin_input;
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u8 mr_rtcwk_shift;
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u8 sr_rtcwk_shift;
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};
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struct shdwc {
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struct shdwc_config *cfg;
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void __iomem *at91_shdwc_base;
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};
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/*
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* Hold configuration here, cannot be more than one instance of the driver
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* since pm_power_off itself is global.
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*/
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static struct shdwc *at91_shdwc;
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static struct clk *sclk;
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static const unsigned long long sdwc_dbc_period[] = {
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0, 3, 32, 512, 4096, 32768,
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};
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static void __init at91_wakeup_status(struct platform_device *pdev)
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{
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struct shdwc *shdw = platform_get_drvdata(pdev);
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u32 reg;
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char *reason = "unknown";
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reg = readl(shdw->at91_shdwc_base + AT91_SHDW_SR);
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dev_dbg(&pdev->dev, "%s: status = %#x\n", __func__, reg);
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/* Simple power-on, just bail out */
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if (!reg)
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return;
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if (SHDW_WK_PIN(reg, shdw->cfg))
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reason = "WKUP pin";
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else if (SHDW_RTCWK(reg, shdw->cfg))
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reason = "RTC";
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pr_info("AT91: Wake-Up source: %s\n", reason);
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}
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static void at91_poweroff(void)
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{
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writel(AT91_SHDW_KEY | AT91_SHDW_SHDW,
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at91_shdwc->at91_shdwc_base + AT91_SHDW_CR);
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}
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static u32 at91_shdwc_debouncer_value(struct platform_device *pdev,
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u32 in_period_us)
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{
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int i;
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int max_idx = ARRAY_SIZE(sdwc_dbc_period) - 1;
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unsigned long long period_us;
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unsigned long long max_period_us = DBC_PERIOD_US(sdwc_dbc_period[max_idx]);
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if (in_period_us > max_period_us) {
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dev_warn(&pdev->dev,
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"debouncer period %u too big, reduced to %llu us\n",
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in_period_us, max_period_us);
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return max_idx;
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}
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for (i = max_idx - 1; i > 0; i--) {
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period_us = DBC_PERIOD_US(sdwc_dbc_period[i]);
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dev_dbg(&pdev->dev, "%s: ref[%d] = %llu\n",
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__func__, i, period_us);
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if (in_period_us > period_us)
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break;
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}
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return i + 1;
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}
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static u32 at91_shdwc_get_wakeup_input(struct platform_device *pdev,
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struct device_node *np)
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{
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struct device_node *cnp;
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u32 wk_input_mask;
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u32 wuir = 0;
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u32 wk_input;
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for_each_child_of_node(np, cnp) {
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if (of_property_read_u32(cnp, "reg", &wk_input)) {
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dev_warn(&pdev->dev, "reg property is missing for %s\n",
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cnp->full_name);
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continue;
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}
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wk_input_mask = 1 << wk_input;
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if (!(wk_input_mask & AT91_SHDW_WKUPEN_MASK)) {
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dev_warn(&pdev->dev,
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"wake-up input %d out of bounds ignore\n",
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wk_input);
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continue;
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}
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wuir |= wk_input_mask;
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if (of_property_read_bool(cnp, "atmel,wakeup-active-high"))
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wuir |= AT91_SHDW_WKUPT(wk_input);
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dev_dbg(&pdev->dev, "%s: (child %d) wuir = %#x\n",
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__func__, wk_input, wuir);
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}
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return wuir;
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}
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static void at91_shdwc_dt_configure(struct platform_device *pdev)
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{
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struct shdwc *shdw = platform_get_drvdata(pdev);
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struct device_node *np = pdev->dev.of_node;
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u32 mode = 0, tmp, input;
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if (!np) {
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dev_err(&pdev->dev, "device node not found\n");
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return;
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}
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if (!of_property_read_u32(np, "debounce-delay-us", &tmp))
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mode |= AT91_SHDW_WKUPDBC(at91_shdwc_debouncer_value(pdev, tmp));
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if (of_property_read_bool(np, "atmel,wakeup-rtc-timer"))
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mode |= SHDW_RTCWKEN(shdw->cfg);
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dev_dbg(&pdev->dev, "%s: mode = %#x\n", __func__, mode);
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writel(mode, shdw->at91_shdwc_base + AT91_SHDW_MR);
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input = at91_shdwc_get_wakeup_input(pdev, np);
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writel(input, shdw->at91_shdwc_base + AT91_SHDW_WUIR);
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}
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static const struct shdwc_config sama5d2_shdwc_config = {
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.wkup_pin_input = 0,
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.mr_rtcwk_shift = 17,
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.sr_rtcwk_shift = 5,
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};
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static const struct of_device_id at91_shdwc_of_match[] = {
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{
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.compatible = "atmel,sama5d2-shdwc",
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.data = &sama5d2_shdwc_config,
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}, {
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/*sentinel*/
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}
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};
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MODULE_DEVICE_TABLE(of, at91_shdwc_of_match);
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static int __init at91_shdwc_probe(struct platform_device *pdev)
|
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{
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struct resource *res;
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const struct of_device_id *match;
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int ret;
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|
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if (!pdev->dev.of_node)
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return -ENODEV;
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at91_shdwc = devm_kzalloc(&pdev->dev, sizeof(*at91_shdwc), GFP_KERNEL);
|
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if (!at91_shdwc)
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return -ENOMEM;
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platform_set_drvdata(pdev, at91_shdwc);
|
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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at91_shdwc->at91_shdwc_base = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(at91_shdwc->at91_shdwc_base)) {
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dev_err(&pdev->dev, "Could not map reset controller address\n");
|
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return PTR_ERR(at91_shdwc->at91_shdwc_base);
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}
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match = of_match_node(at91_shdwc_of_match, pdev->dev.of_node);
|
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at91_shdwc->cfg = (struct shdwc_config *)(match->data);
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||||
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sclk = devm_clk_get(&pdev->dev, NULL);
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||||
if (IS_ERR(sclk))
|
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return PTR_ERR(sclk);
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||||
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||||
ret = clk_prepare_enable(sclk);
|
||||
if (ret) {
|
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dev_err(&pdev->dev, "Could not enable slow clock\n");
|
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return ret;
|
||||
}
|
||||
|
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at91_wakeup_status(pdev);
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||||
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||||
at91_shdwc_dt_configure(pdev);
|
||||
|
||||
pm_power_off = at91_poweroff;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __exit at91_shdwc_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct shdwc *shdw = platform_get_drvdata(pdev);
|
||||
|
||||
if (pm_power_off == at91_poweroff)
|
||||
pm_power_off = NULL;
|
||||
|
||||
/* Reset values to disable wake-up features */
|
||||
writel(0, shdw->at91_shdwc_base + AT91_SHDW_MR);
|
||||
writel(0, shdw->at91_shdwc_base + AT91_SHDW_WUIR);
|
||||
|
||||
clk_disable_unprepare(sclk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver at91_shdwc_driver = {
|
||||
.remove = __exit_p(at91_shdwc_remove),
|
||||
.driver = {
|
||||
.name = "at91-shdwc",
|
||||
.of_match_table = at91_shdwc_of_match,
|
||||
},
|
||||
};
|
||||
module_platform_driver_probe(at91_shdwc_driver, at91_shdwc_probe);
|
||||
|
||||
MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
|
||||
MODULE_DESCRIPTION("Atmel shutdown controller driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
|
@ -382,8 +382,6 @@ static int sbs_get_battery_property(struct i2c_client *client,
|
|||
|
||||
if (ret & BATTERY_FULL_CHARGED)
|
||||
val->intval = POWER_SUPPLY_STATUS_FULL;
|
||||
else if (ret & BATTERY_FULL_DISCHARGED)
|
||||
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
||||
else if (ret & BATTERY_DISCHARGING)
|
||||
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
||||
else
|
||||
|
|
@ -702,8 +700,6 @@ static void sbs_delayed_work(struct work_struct *work)
|
|||
|
||||
if (ret & BATTERY_FULL_CHARGED)
|
||||
ret = POWER_SUPPLY_STATUS_FULL;
|
||||
else if (ret & BATTERY_FULL_DISCHARGED)
|
||||
ret = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
||||
else if (ret & BATTERY_DISCHARGING)
|
||||
ret = POWER_SUPPLY_STATUS_DISCHARGING;
|
||||
else
|
||||
|
|
|
|||
Loading…
Reference in a new issue