linux-kernel - [PATCH v2] irqchip: irq-bcm7120-l2: Use correct I/O accessors for irq_fwd

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Date:   Wed, 30 Aug 2017 17:29:16 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Kevin Cernekee <cernekee@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        linux-mips@...ux-mips.org (open list:BROADCOM BMIPS MIPS ARCHITECTURE)
Subject: [PATCH v2] irqchip: irq-bcm7120-l2: Use correct I/O accessors for irq_fwd_mask

Initialization of irq_fwd_mask was done using __raw_writel() which
happens to work for all cases except when using ARM BE8 which requires
writel() (with the proper swapping). Move the initialization of the
irq_fwd_mask till later when we have correctly defined our I/O
accessors.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
Changes in v2:

- corrected readl vs. writel in commit subject, spotted by Marc

 drivers/irqchip/irq-bcm7120-l2.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/irqchip/irq-bcm7120-l2.c b/drivers/irqchip/irq-bcm7120-l2.c
index 64c2692070ef..983640eba418 100644
--- a/drivers/irqchip/irq-bcm7120-l2.c
+++ b/drivers/irqchip/irq-bcm7120-l2.c
@@ -250,12 +250,6 @@ static int __init bcm7120_l2_intc_probe(struct device_node *dn,
 	if (ret < 0)
 		goto out_free_l1_data;
 
-	for (idx = 0; idx < data->n_words; idx++) {
-		__raw_writel(data->irq_fwd_mask[idx],
-			     data->pair_base[idx] +
-			     data->en_offset[idx]);
-	}
-
 	for (irq = 0; irq < data->num_parent_irqs; irq++) {
 		ret = bcm7120_l2_intc_init_one(dn, data, irq, valid_mask);
 		if (ret)
@@ -297,6 +291,10 @@ static int __init bcm7120_l2_intc_probe(struct device_node *dn,
 		gc->reg_base = data->pair_base[idx];
 		ct->regs.mask = data->en_offset[idx];
 
+		/* gc->reg_base is defined and so is gc->writel */
+		irq_reg_writel(gc, data->irq_fwd_mask[idx],
+			       data->en_offset[idx]);
+
 		ct->chip.irq_mask = irq_gc_mask_clr_bit;
 		ct->chip.irq_unmask = irq_gc_mask_set_bit;
 		ct->chip.irq_ack = irq_gc_noop;
-- 
1.9.1