irqchip/renesas-intc-irqpin: Merge irlm_bit and needs_irlm

Get rid of the separate flag to indicate if the IRLM bit is present in
the INTC/Interrupt Control Register 0, by considering -1 an invalid
irlm_bit value.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20201028153955.1736767-1-geert+renesas@glider.be

diff --git a/drivers/irqchip/irq-renesas-intc-irqpin.c b/drivers/irqchip/irq-renesas-intc-irqpin.c
index 3819185..cb7f60b 100644 (file)
--- a/drivers/irqchip/irq-renesas-intc-irqpin.c
+++ b/drivers/irqchip/irq-renesas-intc-irqpin.c
@@ -71,8 +71,7 @@ struct intc_irqpin_priv {
 };
 
 struct intc_irqpin_config {
-       unsigned int irlm_bit;
-       unsigned needs_irlm:1;
+       int irlm_bit;           /* -1 if non-existent */
 };
 
 static unsigned long intc_irqpin_read32(void __iomem *iomem)
@@ -349,11 +348,10 @@ static const struct irq_domain_ops intc_irqpin_irq_domain_ops = {
 
 static const struct intc_irqpin_config intc_irqpin_irlm_r8a777x = {
        .irlm_bit = 23, /* ICR0.IRLM0 */
-       .needs_irlm = 1,
 };
 
 static const struct intc_irqpin_config intc_irqpin_rmobile = {
-       .needs_irlm = 0,
+       .irlm_bit = -1,
 };
 
 static const struct of_device_id intc_irqpin_dt_ids[] = {
@@ -470,7 +468,7 @@ static int intc_irqpin_probe(struct platform_device *pdev)
        }
 
        /* configure "individual IRQ mode" where needed */
-       if (config && config->needs_irlm) {
+       if (config && config->irlm_bit >= 0) {
                if (io[INTC_IRQPIN_REG_IRLM])
                        intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_IRLM,
                                                      config->irlm_bit, 1, 1);