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From:   Maulik Shah <mkshah@codeaurora.org>
To:     andy.gross@linaro.org, bjorn.andersson@linaro.org,
        linus.walleij@linaro.org
Cc:     linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-gpio@vger.kernel.org, dianders@chromium.org,
        swboyd@chromium.org, rnayak@codeaurora.org, ilina@codeaurora.org,
        lsrao@codeaurora.org,
        Venkata Narendra Kumar Gutta <vnkgutta@codeaurora.org>,
        Maulik Shah <mkshah@codeaurora.org>
Subject: [PATCH] pinctrl: qcom: Add affinity callbacks to msmgpio IRQ chip
Date:   Fri,  1 May 2020 12:00:17 +0530
Message-Id: <1588314617-4556-1-git-send-email-mkshah@codeaurora.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Venkata Narendra Kumar Gutta <vnkgutta@codeaurora.org>

Wakeup capable GPIO IRQs routed via PDC are not being migrated when a CPU
is hotplugged. Add affinity callbacks to msmgpio IRQ chip to update the
affinity of wakeup capable IRQs.

Fixes: e35a6ae0eb3a ("pinctrl/msm: Setup GPIO chip in hierarchy")
Signed-off-by: Venkata Narendra Kumar Gutta <vnkgutta@codeaurora.org>
[mkshah: updated commit text and minor code fixes]
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
---
 drivers/pinctrl/qcom/pinctrl-msm.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 29259fe..83b7d64 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -1033,6 +1033,29 @@ static void msm_gpio_irq_relres(struct irq_data *d)
 	module_put(gc->owner);
 }
 
+static int msm_gpio_irq_set_affinity(struct irq_data *d,
+				const struct cpumask *dest, bool force)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+
+	if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs))
+		return irq_chip_set_affinity_parent(d, dest, force);
+
+	return 0;
+}
+
+static int msm_gpio_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+
+	if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs))
+		return irq_chip_set_vcpu_affinity_parent(d, vcpu_info);
+
+	return 0;
+}
+
 static void msm_gpio_irq_handler(struct irq_desc *desc)
 {
 	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
@@ -1131,6 +1154,8 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
 	pctrl->irq_chip.irq_set_wake = msm_gpio_irq_set_wake;
 	pctrl->irq_chip.irq_request_resources = msm_gpio_irq_reqres;
 	pctrl->irq_chip.irq_release_resources = msm_gpio_irq_relres;
+	pctrl->irq_chip.irq_set_affinity = msm_gpio_irq_set_affinity;
+	pctrl->irq_chip.irq_set_vcpu_affinity = msm_gpio_irq_set_vcpu_affinity;
 
 	np = of_parse_phandle(pctrl->dev->of_node, "wakeup-parent", 0);
 	if (np) {
-- 
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