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irqchip/renesas-rzg2l: Add macro to retrieve TITSR register offset based on register's index

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[ Upstream commit 2eca4731cc66563b3919d8753dbd74d18c39f662 ]

There are 2 TITSR registers available on the IA55 interrupt controller.

Add a macro that retrieves the TITSR register offset based on it's
index. This macro is useful in when adding suspend/resume support so both
TITSR registers can be accessed in a for loop.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20231120111820.87398-7-claudiu.beznea.uj@bp.renesas.com
Stable-dep-of: 853a6030303f ("irqchip/renesas-rzg2l: Prevent spurious interrupts when setting trigger type")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Claudiu Beznea 2023-11-20 13:18:17 +02:00 committed by Greg Kroah-Hartman
parent 9913a07850
commit ec5482d22c
1 changed files with 6 additions and 8 deletions
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14
drivers/irqchip/irq-renesas-rzg2l.c
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@ -28,8 +28,7 @@
#define ISCR 0x10
#define IITSR 0x14
#define TSCR 0x20
#define TITSR0 0x24
#define TITSR1 0x28
#define TITSR(n) (0x24 + (n) * 4)
#define TITSR0_MAX_INT 16
#define TITSEL_WIDTH 0x2
#define TSSR(n) (0x30 + ((n) * 4))
@ -206,8 +205,7 @@ static int rzg2l_tint_set_edge(struct irq_data *d, unsigned int type)
struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
unsigned int hwirq = irqd_to_hwirq(d);
u32 titseln = hwirq - IRQC_TINT_START;
u32 offset;
u8 sense;
u8 index, sense;
u32 reg;
switch (type & IRQ_TYPE_SENSE_MASK) {
@ -223,17 +221,17 @@ static int rzg2l_tint_set_edge(struct irq_data *d, unsigned int type)
return -EINVAL;
}
offset = TITSR0;
index = 0;
if (titseln >= TITSR0_MAX_INT) {
titseln -= TITSR0_MAX_INT;
offset = TITSR1;
index = 1;
}
raw_spin_lock(&priv->lock);
reg = readl_relaxed(priv->base + offset);
reg = readl_relaxed(priv->base + TITSR(index));
reg &= ~(IRQ_MASK << (titseln * TITSEL_WIDTH));
reg |= sense << (titseln * TITSEL_WIDTH);
writel_relaxed(reg, priv->base + offset);
writel_relaxed(reg, priv->base + TITSR(index));
raw_spin_unlock(&priv->lock);
return 0;