linux-kernel - [PATCH V1 01/12] irqchip: tegra: do not disable COP IRQ during suspend

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Message-ID: <1558481483-22254-2-git-send-email-skomatineni@nvidia.com>
Date:   Tue, 21 May 2019 16:31:12 -0700
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     <thierry.reding@...il.com>, <jonathanh@...dia.com>
CC:     <jckuo@...dia.com>, <talho@...dia.com>, <josephl@...dia.com>,
        <skomatineni@...dia.com>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH V1 01/12] irqchip: tegra: do not disable COP IRQ during suspend

BPMP-lite still need IRQ function to finish SC7 suspend sequence for
Tegra210.

This patch has fix for leaving the COP IRQ enabled for Tegra210 during
interrupt controller suspend operation.

Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
---
 drivers/irqchip/irq-tegra.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-tegra.c b/drivers/irqchip/irq-tegra.c
index 0abc0cd1c32e..1882373fa1fd 100644
--- a/drivers/irqchip/irq-tegra.c
+++ b/drivers/irqchip/irq-tegra.c
@@ -53,18 +53,24 @@ static unsigned int num_ictlrs;
 
 struct tegra_ictlr_soc {
 	unsigned int num_ictlrs;
+	bool has_bpmpl;
 };
 
+static const struct tegra_ictlr_soc *soc;
+
 static const struct tegra_ictlr_soc tegra20_ictlr_soc = {
 	.num_ictlrs = 4,
+	.has_bpmpl = false,
 };
 
 static const struct tegra_ictlr_soc tegra30_ictlr_soc = {
 	.num_ictlrs = 5,
+	.has_bpmpl = false,
 };
 
 static const struct tegra_ictlr_soc tegra210_ictlr_soc = {
 	.num_ictlrs = 6,
+	.has_bpmpl = true,
 };
 
 static const struct of_device_id ictlr_matches[] = {
@@ -157,7 +163,8 @@ static int tegra_ictlr_suspend(void)
 		lic->cop_iep[i] = readl_relaxed(ictlr + ICTLR_COP_IEP_CLASS);
 
 		/* Disable COP interrupts */
-		writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
+		if (!soc->has_bpmpl)
+			writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
 
 		/* Disable CPU interrupts */
 		writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
@@ -286,7 +293,6 @@ static int __init tegra_ictlr_init(struct device_node *node,
 {
 	struct irq_domain *parent_domain, *domain;
 	const struct of_device_id *match;
-	const struct tegra_ictlr_soc *soc;
 	unsigned int i;
 	int err;
 
-- 
2.7.4