pinctrl: qcom: Properly clear "intr_ack_high" interrupts when unmasking

In commit 4b7618fdc7e6 ("pinctrl: qcom: Add irq_enable callback for
msm gpio") we tried to Ack interrupts during unmask.  However, that
patch forgot to check "intr_ack_high" so, presumably, it only worked
for a certain subset of SoCs.

Let's add a small accessor so we don't need to open-code the logic in
both places.

This was found by code inspection.  I don't have any access to the
hardware in question nor software that needs the Ack during unmask.

Fixes: 4b7618fdc7e6 ("pinctrl: qcom: Add irq_enable callback for msm gpio")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Maulik Shah <mkshah@codeaurora.org>
Tested-by: Maulik Shah <mkshah@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210114191601.v7.3.I32d0f4e174d45363b49ab611a13c3da8f1e87d0f@changeid
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 2f363c2..192ed31 100644 (file)
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -96,6 +96,14 @@ MSM_ACCESSOR(intr_cfg)
 MSM_ACCESSOR(intr_status)
 MSM_ACCESSOR(intr_target)
 
+static void msm_ack_intr_status(struct msm_pinctrl *pctrl,
+                               const struct msm_pingroup *g)
+{
+       u32 val = g->intr_ack_high ? BIT(g->intr_status_bit) : 0;
+
+       msm_writel_intr_status(val, pctrl, g);
+}
+
 static int msm_get_groups_count(struct pinctrl_dev *pctldev)
 {
        struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
@@ -797,7 +805,7 @@ static void msm_gpio_irq_clear_unmask(struct irq_data *d, bool status_clear)
         * when the interrupt is not in use.
         */
        if (status_clear)
-               msm_writel_intr_status(0, pctrl, g);
+               msm_ack_intr_status(pctrl, g);
 
        val = msm_readl_intr_cfg(pctrl, g);
        val |= BIT(g->intr_raw_status_bit);
@@ -890,7 +898,6 @@ static void msm_gpio_irq_ack(struct irq_data *d)
        struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
        const struct msm_pingroup *g;
        unsigned long flags;
-       u32 val;
 
        if (test_bit(d->hwirq, pctrl->skip_wake_irqs)) {
                if (test_bit(d->hwirq, pctrl->dual_edge_irqs))
@@ -902,8 +909,7 @@ static void msm_gpio_irq_ack(struct irq_data *d)
 
        raw_spin_lock_irqsave(&pctrl->lock, flags);
 
-       val = g->intr_ack_high ? BIT(g->intr_status_bit) : 0;
-       msm_writel_intr_status(val, pctrl, g);
+       msm_ack_intr_status(pctrl, g);
 
        if (test_bit(d->hwirq, pctrl->dual_edge_irqs))
                msm_gpio_update_dual_edge_pos(pctrl, g, d);