diff options
| author | Biju Das <biju.das.jz@bp.renesas.com> | 2025-04-15 13:33:41 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2025-04-16 15:29:38 +0300 |
| commit | 28e89cdac6482f3c980df3e2e245db7366269124 (patch) | |
| tree | a282a819a6fe33b493a5d23515928108aa76e355 | |
| parent | fbb429ddff5c8e479edcc7dde5a542c9295944e6 (diff) | |
| download | linux-28e89cdac6482f3c980df3e2e245db7366269124.tar.xz | |
irqchip/renesas-rzv2h: Prevent TINT spurious interrupt
A spurious TINT interrupt is seen during boot on RZ/G3E SMARC EVK.
A glitch in the edge detection circuit can cause a spurious interrupt.
Clear the status flag after setting the ICU_TSSRk registers, which is
recommended in the hardware manual as a countermeasure.
Fixes: 0d7605e75ac2 ("irqchip: Add RZ/V2H(P) Interrupt Control Unit (ICU) driver")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/irqchip/irq-renesas-rzv2h.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-renesas-rzv2h.c b/drivers/irqchip/irq-renesas-rzv2h.c index 3d5b5fdf9bde..0f0fd7d4dfdf 100644 --- a/drivers/irqchip/irq-renesas-rzv2h.c +++ b/drivers/irqchip/irq-renesas-rzv2h.c @@ -170,6 +170,14 @@ static void rzv2h_tint_irq_endisable(struct irq_data *d, bool enable) else tssr &= ~ICU_TSSR_TIEN(tssel_n, priv->info->field_width); writel_relaxed(tssr, priv->base + priv->info->t_offs + ICU_TSSR(k)); + + /* + * A glitch in the edge detection circuit can cause a spurious + * interrupt. Clear the status flag after setting the ICU_TSSRk + * registers, which is recommended by the hardware manual as a + * countermeasure. + */ + writel_relaxed(BIT(tint_nr), priv->base + priv->info->t_offs + ICU_TSCLR); } static void rzv2h_icu_irq_disable(struct irq_data *d) |