Commit bd5bca13 authored by Linus Torvalds's avatar Linus Torvalds
Browse files
Pull pin control fixes from Linus Walleij:

 - A complicated IRQ fix for the MSM driver (see commit)

 - Fix the group/function check in the Ingenic driver

 - Deal with a possible NULL pointer dereference in the Madera driver

* tag 'pinctrl-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: madera: Fix possible NULL pointer with pdata config
  pinctrl: ingenic: Fix group & function error checking
  pinctrl: msm: Really mask level interrupts to prevent latching
parents f1c03a46 5bc5a671
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+1 −1
Original line number Diff line number Diff line
@@ -1040,7 +1040,7 @@ static int madera_pin_probe(struct platform_device *pdev)
	}

	/* if the configuration is provided through pdata, apply it */
	if (pdata) {
	if (pdata && pdata->gpio_configs) {
		ret = pinctrl_register_mappings(pdata->gpio_configs,
						pdata->n_gpio_configs);
		if (ret) {
+2 −2
Original line number Diff line number Diff line
@@ -793,7 +793,7 @@ static int ingenic_pinctrl_probe(struct platform_device *pdev)

		err = pinctrl_generic_add_group(jzpc->pctl, group->name,
				group->pins, group->num_pins, group->data);
		if (err) {
		if (err < 0) {
			dev_err(dev, "Failed to register group %s\n",
					group->name);
			return err;
@@ -806,7 +806,7 @@ static int ingenic_pinctrl_probe(struct platform_device *pdev)
		err = pinmux_generic_add_function(jzpc->pctl, func->name,
				func->group_names, func->num_group_names,
				func->data);
		if (err) {
		if (err < 0) {
			dev_err(dev, "Failed to register function %s\n",
					func->name);
			return err;
+24 −0
Original line number Diff line number Diff line
@@ -634,6 +634,29 @@ static void msm_gpio_irq_mask(struct irq_data *d)
	raw_spin_lock_irqsave(&pctrl->lock, flags);

	val = readl(pctrl->regs + g->intr_cfg_reg);
	/*
	 * There are two bits that control interrupt forwarding to the CPU. The
	 * RAW_STATUS_EN bit causes the level or edge sensed on the line to be
	 * latched into the interrupt status register when the hardware detects
	 * an irq that it's configured for (either edge for edge type or level
	 * for level type irq). The 'non-raw' status enable bit causes the
	 * hardware to assert the summary interrupt to the CPU if the latched
	 * status bit is set. There's a bug though, the edge detection logic
	 * seems to have a problem where toggling the RAW_STATUS_EN bit may
	 * cause the status bit to latch spuriously when there isn't any edge
	 * so we can't touch that bit for edge type irqs and we have to keep
	 * the bit set anyway so that edges are latched while the line is masked.
	 *
	 * To make matters more complicated, leaving the RAW_STATUS_EN bit
	 * enabled all the time causes level interrupts to re-latch into the
	 * status register because the level is still present on the line after
	 * we ack it. We clear the raw status enable bit during mask here and
	 * set the bit on unmask so the interrupt can't latch into the hardware
	 * while it's masked.
	 */
	if (irqd_get_trigger_type(d) & IRQ_TYPE_LEVEL_MASK)
		val &= ~BIT(g->intr_raw_status_bit);

	val &= ~BIT(g->intr_enable_bit);
	writel(val, pctrl->regs + g->intr_cfg_reg);

@@ -655,6 +678,7 @@ static void msm_gpio_irq_unmask(struct irq_data *d)
	raw_spin_lock_irqsave(&pctrl->lock, flags);

	val = readl(pctrl->regs + g->intr_cfg_reg);
	val |= BIT(g->intr_raw_status_bit);
	val |= BIT(g->intr_enable_bit);
	writel(val, pctrl->regs + g->intr_cfg_reg);