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authorSubbaraman Narayanamurthy <subbaram@codeaurora.org>2022-09-30 03:50:13 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-09-30 15:33:23 +0300
commitb6c1761721193c52234e3ed048e4d16ab527bb74 (patch)
tree2cc9d6976ffbc0a93d4928931466f4ed8a780297 /drivers/spmi
parentabb9088b3a39cfec1321e93170ee3c0c1255fd9d (diff)
downloadlinux-b6c1761721193c52234e3ed048e4d16ab527bb74.tar.xz
spmi: pmic-arb: do not ack and clear peripheral interrupts in cleanup_irq
Currently, cleanup_irq() is invoked when a peripheral's interrupt fires and there is no mapping present in the interrupt domain of spmi interrupt controller. The cleanup_irq clears the arbiter bit, clears the pmic interrupt and disables it at the pmic in that order. The last disable in cleanup_irq races with request_irq() in that it stomps over the enable issued by request_irq. Fix this by not writing to the pmic in cleanup_irq. The latched bit will be left set in the pmic, which will not send us more interrupts even if the enable bit stays enabled. When a client wants to request an interrupt, use the activate callback on the irq_domain to clear latched bit. This ensures that the latched, if set due to the above changes in cleanup_irq or when the bootloader leaves it set, gets cleaned up, paving way for upcoming interrupts to trigger. With this, there is a possibility of unwanted triggering of interrupt right after the latched bit is cleared - the interrupt may be left enabled too. To avoid that, clear the enable first followed by clearing the latched bit in the activate callback. Fixes: 6bc546e71e50 ("spmi: pmic-arb: cleanup unrequested irqs") Fixes: 02abec3616c1 ("spmi: pmic-arb: rename pa_xx to pmic_arb_xx and other cleanup") Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org> [collinsd@codeaurora.org: fix merge conflict] Signed-off-by: David Collins <collinsd@codeaurora.org> Signed-off-by: Fenglin Wu <quic_fenglinw@quicinc.com> Link: https://lore.kernel.org/r/1655004286-11493-4-git-send-email-quic_fenglinw@quicinc.com Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20220930005019.2663064-5-sboyd@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/spmi')
-rw-r--r--drivers/spmi/spmi-pmic-arb.c15
1 files changed, 5 insertions, 10 deletions
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 719bd73e5153..2bc3b88f35c9 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -593,16 +593,6 @@ static void cleanup_irq(struct spmi_pmic_arb *pmic_arb, u16 apid, int id)
dev_err_ratelimited(&pmic_arb->spmic->dev, "%s apid=%d sid=0x%x per=0x%x irq=%d\n",
__func__, apid, sid, per, id);
writel_relaxed(irq_mask, pmic_arb->ver_ops->irq_clear(pmic_arb, apid));
-
- if (pmic_arb_write_cmd(pmic_arb->spmic, SPMI_CMD_EXT_WRITEL, sid,
- (per << 8) + QPNPINT_REG_LATCHED_CLR, &irq_mask, 1))
- dev_err_ratelimited(&pmic_arb->spmic->dev, "failed to ack irq_mask = 0x%x for ppid = %x\n",
- irq_mask, ppid);
-
- if (pmic_arb_write_cmd(pmic_arb->spmic, SPMI_CMD_EXT_WRITEL, sid,
- (per << 8) + QPNPINT_REG_EN_CLR, &irq_mask, 1))
- dev_err_ratelimited(&pmic_arb->spmic->dev, "failed to ack irq_mask = 0x%x for ppid = %x\n",
- irq_mask, ppid);
}
static int periph_interrupt(struct spmi_pmic_arb *pmic_arb, u16 apid)
@@ -780,6 +770,7 @@ static int qpnpint_irq_domain_activate(struct irq_domain *domain,
u16 apid = hwirq_to_apid(d->hwirq);
u16 sid = hwirq_to_sid(d->hwirq);
u16 irq = hwirq_to_irq(d->hwirq);
+ u8 buf;
if (pmic_arb->apid_data[apid].irq_ee != pmic_arb->ee) {
dev_err(&pmic_arb->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u: ee=%u but owner=%u\n",
@@ -788,6 +779,10 @@ static int qpnpint_irq_domain_activate(struct irq_domain *domain,
return -ENODEV;
}
+ buf = BIT(irq);
+ qpnpint_spmi_write(d, QPNPINT_REG_EN_CLR, &buf, 1);
+ qpnpint_spmi_write(d, QPNPINT_REG_LATCHED_CLR, &buf, 1);
+
return 0;
}