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Date: Sun, 25 Aug 2019 09:10:16 +0200
From: Shawn Guo <shawnguo@...nel.org>
To: Robin van der Gracht <robin@...tonic.nl>
Cc: Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
NXP Linux Team <linux-imx@....com>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
Robin Gong <yibin.gong@....com>, Adam Ford <aford173@...il.com>
Subject: Re: [PATCH] input: keyboard: snvs_pwrkey: Send press and release
event for i.MX6 S,DL and Q
On Fri, Aug 23, 2019 at 02:30:02PM +0200, Robin van der Gracht wrote:
> The older generation i.MX6 processors send a powerdown request interrupt if
> the powerkey is released before a hard shutdown (5 second press). This should
> allow software to bring down the SoC safely.
>
> For this driver to work as a regular powerkey with the older SoCs, we need to
> send a keypress AND release when we get the powerdown request interrupt.
>
> Signed-off-by: Robin van der Gracht <robin@...tonic.nl>
> ---
> arch/arm/boot/dts/imx6qdl.dtsi | 2 +-
> arch/arm/boot/dts/imx6sll.dtsi | 2 +-
> arch/arm/boot/dts/imx6sx.dtsi | 2 +-
> arch/arm/boot/dts/imx6ul.dtsi | 2 +-
> arch/arm/boot/dts/imx7s.dtsi | 2 +-
Please have dts changes in a separate patch.
> drivers/input/keyboard/Kconfig | 2 +-
> drivers/input/keyboard/snvs_pwrkey.c | 59 +++++++++++++++++++++++-----
> 7 files changed, 56 insertions(+), 15 deletions(-)
>
> diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
> index b3a77bcf00d51..c10d12658743c 100644
> --- a/arch/arm/boot/dts/imx6qdl.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl.dtsi
> @@ -836,7 +836,7 @@
> };
>
> snvs_pwrkey: snvs-powerkey {
> - compatible = "fsl,sec-v4.0-pwrkey";
> + compatible = "fsl,imx6qdl-sec-v4.0-pwrkey";
> regmap = <&snvs>;
> interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> linux,keycode = <KEY_POWER>;
> diff --git a/arch/arm/boot/dts/imx6sll.dtsi b/arch/arm/boot/dts/imx6sll.dtsi
> index 1b4899f0fcded..91c7d5bdcc359 100644
> --- a/arch/arm/boot/dts/imx6sll.dtsi
> +++ b/arch/arm/boot/dts/imx6sll.dtsi
> @@ -571,7 +571,7 @@
> };
>
> snvs_pwrkey: snvs-powerkey {
> - compatible = "fsl,sec-v4.0-pwrkey";
> + compatible = "fsl,imx6sx-sec-v4.0-pwrkey";
> regmap = <&snvs>;
> interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> linux,keycode = <KEY_POWER>;
> diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
> index b16a123990a26..b6736db65350f 100644
> --- a/arch/arm/boot/dts/imx6sx.dtsi
> +++ b/arch/arm/boot/dts/imx6sx.dtsi
> @@ -733,7 +733,7 @@
> };
>
> snvs_pwrkey: snvs-powerkey {
> - compatible = "fsl,sec-v4.0-pwrkey";
> + compatible = "fsl,imx6sx-sec-v4.0-pwrkey";
> regmap = <&snvs>;
> interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> linux,keycode = <KEY_POWER>;
> diff --git a/arch/arm/boot/dts/imx6ul.dtsi b/arch/arm/boot/dts/imx6ul.dtsi
> index a7f6d1d58e20d..d4678c52b55db 100644
> --- a/arch/arm/boot/dts/imx6ul.dtsi
> +++ b/arch/arm/boot/dts/imx6ul.dtsi
> @@ -644,7 +644,7 @@
> };
>
> snvs_pwrkey: snvs-powerkey {
> - compatible = "fsl,sec-v4.0-pwrkey";
> + compatible = "fsl,imx6sx-sec-v4.0-pwrkey";
> regmap = <&snvs>;
> interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> linux,keycode = <KEY_POWER>;
> diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
> index 106711d2c01b0..bb68c23beb199 100644
> --- a/arch/arm/boot/dts/imx7s.dtsi
> +++ b/arch/arm/boot/dts/imx7s.dtsi
> @@ -604,7 +604,7 @@
> };
>
> snvs_pwrkey: snvs-powerkey {
> - compatible = "fsl,sec-v4.0-pwrkey";
> + compatible = "fsl,imx6sx-sec-v4.0-pwrkey";
> regmap = <&snvs>;
> interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> linux,keycode = <KEY_POWER>;
> diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
> index 7c4f19dab34fd..937e58da5ce17 100644
> --- a/drivers/input/keyboard/Kconfig
> +++ b/drivers/input/keyboard/Kconfig
> @@ -436,7 +436,7 @@ config KEYBOARD_SNVS_PWRKEY
> depends on OF
> help
> This is the snvs powerkey driver for the Freescale i.MX application
> - processors that are newer than i.MX6 SX.
> + processors.
>
> To compile this driver as a module, choose M here; the
> module will be called snvs_pwrkey.
> diff --git a/drivers/input/keyboard/snvs_pwrkey.c b/drivers/input/keyboard/snvs_pwrkey.c
> index 5342d8d45f811..c321e5f2d1087 100644
> --- a/drivers/input/keyboard/snvs_pwrkey.c
> +++ b/drivers/input/keyboard/snvs_pwrkey.c
> @@ -29,6 +29,11 @@
> #define DEBOUNCE_TIME 30
> #define REPEAT_INTERVAL 60
>
> +enum imx_snvs_hwtype {
> + IMX6SX_SNVS, /* i.MX6 SoloX and newer */
> + IMX6QDL_SNVS, /* i.MX6 Solo, DualLite adn Quad */
> +};
> +
> struct pwrkey_drv_data {
> struct regmap *snvs;
> int irq;
> @@ -37,6 +42,19 @@ struct pwrkey_drv_data {
> int wakeup;
> struct timer_list check_timer;
> struct input_dev *input;
> + enum imx_snvs_hwtype hwtype;
> +};
> +
> +static const struct platform_device_id imx_snvs_devtype[] = {
> + {
> + .name = "imx6sx-snvs-pwrkey",
> + .driver_data = IMX6SX_SNVS,
> + }, {
> + .name = "imx6qdl-snvs-pwrkey",
> + .driver_data = IMX6QDL_SNVS,
> + }, {
> + /* sentinel */
> + }
> };
>
> static void imx_imx_snvs_check_for_events(struct timer_list *t)
> @@ -67,13 +85,23 @@ static irqreturn_t imx_snvs_pwrkey_interrupt(int irq, void *dev_id)
> {
> struct platform_device *pdev = dev_id;
> struct pwrkey_drv_data *pdata = platform_get_drvdata(pdev);
> + struct input_dev *input = pdata->input;
> u32 lp_status;
>
> - pm_wakeup_event(pdata->input->dev.parent, 0);
> + pm_wakeup_event(input->dev.parent, 0);
>
> regmap_read(pdata->snvs, SNVS_LPSR_REG, &lp_status);
> - if (lp_status & SNVS_LPSR_SPO)
> - mod_timer(&pdata->check_timer, jiffies + msecs_to_jiffies(DEBOUNCE_TIME));
> + if (lp_status & SNVS_LPSR_SPO) {
> + if (pdata->hwtype == IMX6QDL_SNVS) {
> + input_report_key(input, pdata->keycode, 1);
> + input_report_key(input, pdata->keycode, 0);
> + input_sync(input);
> + pm_relax(input->dev.parent);
> + } else {
> + mod_timer(&pdata->check_timer,
> + jiffies + msecs_to_jiffies(DEBOUNCE_TIME));
> + }
> + }
>
> /* clear SPO status */
> regmap_write(pdata->snvs, SNVS_LPSR_REG, SNVS_LPSR_SPO);
> @@ -88,11 +116,24 @@ static void imx_snvs_pwrkey_act(void *pdata)
> del_timer_sync(&pd->check_timer);
> }
>
> +static const struct of_device_id imx_snvs_pwrkey_ids[] = {
> + {
> + .compatible = "fsl,imx6sx-sec-v4.0-pwrkey",
The new compatible should be documented.
> + .data = &imx_snvs_devtype[IMX6SX_SNVS],
> + }, {
> + .compatible = "fsl,imx6qdl-sec-v4.0-pwrkey",
> + .data = &imx_snvs_devtype[IMX6QDL_SNVS],
> + },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, imx_snvs_pwrkey_ids);
> +
> static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
> {
> struct pwrkey_drv_data *pdata = NULL;
> struct input_dev *input = NULL;
> struct device_node *np;
> + const struct of_device_id *of_id;
> int error;
>
> /* Get SNVS register Page */
> @@ -100,6 +141,11 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
> if (!np)
> return -ENODEV;
>
> + of_id = of_match_node(imx_snvs_pwrkey_ids, np);
> + if (!of_id)
> + return -ENODEV;
> + pdev->id_entry = of_id->data;
> +
> pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
> if (!pdata)
> return -ENOMEM;
> @@ -116,6 +162,7 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
> }
>
> pdata->wakeup = of_property_read_bool(np, "wakeup-source");
> + pdata->hwtype = pdev->id_entry->driver_data;
>
> pdata->irq = platform_get_irq(pdev, 0);
> if (pdata->irq < 0) {
> @@ -175,12 +222,6 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
> return 0;
> }
>
> -static const struct of_device_id imx_snvs_pwrkey_ids[] = {
> - { .compatible = "fsl,sec-v4.0-pwrkey" },
The compatible should be kept for not breaking existing DTBs.
Shawn
> - { /* sentinel */ }
> -};
> -MODULE_DEVICE_TABLE(of, imx_snvs_pwrkey_ids);
> -
> static struct platform_driver imx_snvs_pwrkey_driver = {
> .driver = {
> .name = "snvs_pwrkey",
> --
> 2.20.1
>
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