From: Binghua Duan <[email protected]> there is an embedded PWRC(power controller) in SiRFprimaII and SiRFatlasVI, we have an ONKEY button which can generate interrupt to IRQ controller. in a typical user scenarios, at the runtime, if users touch the key, we put system to s2ram status.
Signed-off-by: Binghua Duan <[email protected]> Signed-off-by: Xianglong Du <[email protected]> Signed-off-by: Barry Song <[email protected]> --- -v2: cleanup according to Dmitry's comments drivers/input/misc/Kconfig | 10 +++ drivers/input/misc/Makefile | 1 + drivers/input/misc/sirfsoc-onkey.c | 163 +++++++++++++++++++++++++++++++++++++ 3 files changed, 174 insertions(+) create mode 100644 drivers/input/misc/sirfsoc-onkey.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index bb698e1..1d91d1b 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -637,4 +637,14 @@ config INPUT_XEN_KBDDEV_FRONTEND To compile this driver as a module, choose M here: the module will be called xen-kbdfront. +config INPUT_SIRFSOC_ONKEY + bool "CSR SiRFSoC power on/off/suspend key support" + depends on ARCH_SIRF + default y + help + Say Y here if you want to support for the SiRFSoC power on/off/suspend key + in Linux, after you press the onkey, system will suspend. + + If unsure, say N. + endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index d7fc17f..829de43 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o +obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) += sirfsoc-onkey.o obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON) += twl4030-pwrbutton.o obj-$(CONFIG_INPUT_TWL4030_VIBRA) += twl4030-vibra.o diff --git a/drivers/input/misc/sirfsoc-onkey.c b/drivers/input/misc/sirfsoc-onkey.c new file mode 100644 index 0000000..a4aee61 --- /dev/null +++ b/drivers/input/misc/sirfsoc-onkey.c @@ -0,0 +1,163 @@ +/* + * Power key driver for SiRF PrimaII + * + * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company. + * + * Licensed under GPLv2 or later. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/input.h> +#include <linux/rtc/sirfsoc_rtciobrg.h> +#include <linux/of.h> + +struct sirfsoc_pwrc_drvdata { + u32 pwrc_base; + struct input_dev *input; +}; + +#define PWRC_ON_KEY_BIT (1 << 0) + +#define PWRC_INT_STATUS 0xc +#define PWRC_INT_MASK 0x10 + +static irqreturn_t sirfsoc_pwrc_isr(int irq, void *dev_id) +{ + struct sirfsoc_pwrc_drvdata *pwrcdrv = + (struct sirfsoc_pwrc_drvdata *)dev_id; + u32 int_status; + int_status = sirfsoc_rtc_iobrg_readl( + pwrcdrv->pwrc_base + PWRC_INT_STATUS); + sirfsoc_rtc_iobrg_writel(int_status & (~PWRC_ON_KEY_BIT), + pwrcdrv->pwrc_base + PWRC_INT_STATUS); + + /* + * For a typical Linux system, we report KEY_SUSPEND to trigger apm-power.c + * to queue a SUSPEND APM event + */ + input_event(pwrcdrv->input, EV_PWR, KEY_SUSPEND, 1); + input_sync(pwrcdrv->input); + + /* + * Todo: report KEY_POWER event for Android platforms, Android PowerManager + * will handle the suspend and powerdown/hibernation + */ + + return IRQ_HANDLED; +} + +static const struct of_device_id sirfsoc_pwrc_of_match[] = { + { .compatible = "sirf,prima2-pwrc" }, + {}, +} +MODULE_DEVICE_TABLE(of, sirfsoc_pwrc_of_match); + +static int sirfsoc_pwrc_probe(struct platform_device *pdev) +{ + int ret, irq; + struct sirfsoc_pwrc_drvdata *pwrcdrv = NULL; + struct device_node *np = pdev->dev.of_node; + + pwrcdrv = devm_kzalloc(&pdev->dev, + sizeof(struct sirfsoc_pwrc_drvdata), GFP_KERNEL); + if (!pwrcdrv) { + dev_info(&pdev->dev, "kzalloc fail!\n"); + return -ENOMEM; + } + + /* + * we can't use of_iomap because pwrc is not mapped in memory, the so-called base + * address is only offset in rtciobrg + */ + ret = of_property_read_u32(np, "reg", &pwrcdrv->pwrc_base); + if (ret) { + dev_err(&pdev->dev, "unable to find base address of pwrc node in dtb\n"); + return ret; + } + + pwrcdrv->input = devm_input_allocate_device(&pdev->dev); + if (!pwrcdrv->input) + return -ENOMEM; + + pwrcdrv->input->name = "sirfsoc pwrckey"; + pwrcdrv->input->phys = "pwrc/input0"; + + platform_set_drvdata(pdev, pwrcdrv); + + irq = platform_get_irq(pdev, 0); + ret = devm_request_irq(&pdev->dev, irq, + sirfsoc_pwrc_isr, IRQF_SHARED, + "sirfsoc_pwrc_int", pwrcdrv); + if (ret) { + dev_err(&pdev->dev, "pwrc: Unable to claim irq %d; error %d\n", + irq, ret); + return ret; + } + + sirfsoc_rtc_iobrg_writel( + sirfsoc_rtc_iobrg_readl(pwrcdrv->pwrc_base + PWRC_INT_MASK) + | PWRC_ON_KEY_BIT, pwrcdrv->pwrc_base + PWRC_INT_MASK); + + pwrcdrv->input->evbit[0] = BIT_MASK(EV_PWR) | BIT_MASK(EV_KEY); + set_bit(KEY_POWER, pwrcdrv->input->keybit); + + ret = input_register_device(pwrcdrv->input); + if (ret) { + dev_err(&pdev->dev, + "pwrc: Unable to register input device,error: %d\n", + ret); + return ret; + } + + device_init_wakeup(&pdev->dev, 1); + + return 0; +} + +static int sirfsoc_pwrc_remove(struct platform_device *pdev) +{ + device_init_wakeup(&pdev->dev, 0); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int pwrc_resume(struct device *dev) +{ + struct sirfsoc_pwrc_drvdata *pwrcdrv = dev_get_drvdata(dev); + /* + * Do not mask pwrc interrupt as we want pwrc work as a wakeup source + * if users touch X_ONKEY_B, see arch/arm/mach-prima2/pm.c + */ + sirfsoc_rtc_iobrg_writel( + sirfsoc_rtc_iobrg_readl( + pwrcdrv->pwrc_base + PWRC_INT_MASK) | PWRC_ON_KEY_BIT, + pwrcdrv->pwrc_base + PWRC_INT_MASK); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(sirfsoc_pwrc_pm_ops, NULL, pwrc_resume); + +static struct platform_driver sirfsoc_pwrc_driver = { + .probe = sirfsoc_pwrc_probe, + .remove = sirfsoc_pwrc_remove, + .driver = { + .name = "sirfsoc-pwrc", + .owner = THIS_MODULE, + .pm = &sirfsoc_pwrc_pm_ops, + .of_match_table = of_match_ptr(sirfsoc_pwrc_of_match), + } +}; + +module_platform_driver(sirfsoc_pwrc_driver); + +MODULE_LICENSE("GPLv2"); +MODULE_AUTHOR("Binghua Duan <[email protected]>, Xianglong Du <[email protected]>"); +MODULE_DESCRIPTION("CSR Prima2 PWRC Driver"); +MODULE_ALIAS("platform:sirfsoc-pwrc"); -- 1.8.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
