irqchip/renesas-rzg2l: Add macro to retrieve TITSR register offset based on register's index
[ Upstream commit 2eca4731 ] 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: 853a6030 ("irqchip/renesas-rzg2l: Prevent spurious interrupts when setting trigger type") Signed-off-by: Sasha Levin <sashal@kernel.org>
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