From: Xinming Hu <huxm@xxxxxxxxxxx> This patch implement a framework for board specific wakeup. driver parse irq/gpio number from device tree, corresponding resources will be allocated, and used for host suspend/resume. driver private binding file is also updated in the patch. Signed-off-by: Xinming Hu <huxm@xxxxxxxxxxx> Signed-off-by: Amitkumar Karwar <akarwar@xxxxxxxxxxx> --- v4: Replaced #ifdef with __maybe_unused(Arnd Bergmann) --- .../bindings/net/wireless/marvell-sd8xxx.txt | 10 +++ .../net/wireless/marvell/mwifiex/platform_drv.c | 91 ++++++++++++++++++++++ 2 files changed, 101 insertions(+) diff --git a/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt b/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt index c337fab..50138fd 100644 --- a/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt +++ b/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt @@ -14,6 +14,11 @@ Optional properties: - marvell,wakeup-gpios : Chip's wakeup gpio pin number. This needs to be downloaded to to firmware. Chip notifies wifi wakeup signal to SOC through this pin. + - interrupt-parent: phandle of the parent interrupt controller + - interrupts : interrupt number to the cpu + - gpios: specify SOC's wakeup GPIO + - pinctrl-names : a pinctrl state named "default" must be defined + - pinctrl-0 : pin control group to be used for this controller Example: @@ -27,5 +32,10 @@ wlan { marvell,caldata_00_txpwrlimit_2g_cfg_set = /bits/ 8 < 0x01 0x00 0x06 0x00 0x08 0x02 0x89 0x01 ...>; marvell,wakeup-gpios = <3>; + interrupt-parent = <&pio>; + interrupts = <38 IRQ_TYPE_LEVEL_LOW>; + gpios = <&pio 38 GPIO_ACTIVE_HIGH>; + pinctrl-names = "default"; + pinctrl-0 = <&wake_pins>; }; diff --git a/drivers/net/wireless/marvell/mwifiex/platform_drv.c b/drivers/net/wireless/marvell/mwifiex/platform_drv.c index 5fd5d80..5ae7dc0 100644 --- a/drivers/net/wireless/marvell/mwifiex/platform_drv.c +++ b/drivers/net/wireless/marvell/mwifiex/platform_drv.c @@ -18,9 +18,63 @@ struct platform_device *mwifiex_plt_dev; +struct mwifiex_wake_dev { + struct device *dev; + int irq_wifi; + bool wake_by_wifi; +}; + +static irqreturn_t mwifiex_wake_irq_wifi(int irq, void *priv) +{ + struct mwifiex_wake_dev *ctx = priv; + + if (ctx->irq_wifi >= 0) { + ctx->wake_by_wifi = true; + disable_irq_nosync(ctx->irq_wifi); + } + + return IRQ_HANDLED; +} + static int mwifiex_plt_probe(struct platform_device *pdev) { + int ret; + struct mwifiex_wake_dev *ctx; + int gpio; + mwifiex_plt_dev = pdev; + + ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->dev = &pdev->dev; + ctx->irq_wifi = platform_get_irq(pdev, 0); + if (ctx->irq_wifi < 0) + dev_err(&pdev->dev, "Failed to get irq_wifi\n"); + + gpio = of_get_gpio(pdev->dev.of_node, 0); + if (gpio_is_valid(gpio)) + gpio_direction_input(gpio); + else + dev_err(&pdev->dev, "gpio wifi is invalid\n"); + + if (ctx->irq_wifi >= 0) { + ret = devm_request_irq(&pdev->dev, ctx->irq_wifi, + mwifiex_wake_irq_wifi, + IRQF_TRIGGER_LOW, + "wifi_wake", ctx); + if (ret) { + dev_err(&pdev->dev, + "Failed to request irq_wifi %d (%d)\n", + ctx->irq_wifi, ret); + return -EINVAL; + } + disable_irq(ctx->irq_wifi); + } + + platform_set_drvdata(pdev, ctx); + return 0; } @@ -30,6 +84,42 @@ static int mwifiex_plt_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused mwifiex_plt_suspend(struct device *dev) +{ + struct mwifiex_wake_dev *ctx = dev_get_drvdata(dev); + int ret; + + if (ctx->irq_wifi >= 0) { + ctx->wake_by_wifi = false; + enable_irq(ctx->irq_wifi); + ret = enable_irq_wake(ctx->irq_wifi); + if (ret) + return ret; + } + + return 0; +} + +static int __maybe_unused mwifiex_plt_resume(struct device *dev) +{ + struct mwifiex_wake_dev *ctx = dev_get_drvdata(dev); + int ret; + + if (ctx->irq_wifi >= 0) { + ret = disable_irq_wake(ctx->irq_wifi); + if (!ctx->wake_by_wifi) + disable_irq(ctx->irq_wifi); + if (ret) + return ret; + } + + return 0; +} + +static const struct dev_pm_ops mwifiex_plt_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mwifiex_plt_suspend, mwifiex_plt_resume) +}; + static const struct of_device_id mwifiex_dt_match[] = { { .compatible = "marvell,sd8xxx", @@ -45,6 +135,7 @@ static struct platform_driver mwifiex_platform_driver = { .driver = { .name = "mwifiex_plt", .of_match_table = mwifiex_dt_match, + .pm = &mwifiex_plt_pm_ops, } }; -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html