linux-kernel - [PATCH v3 3/3] pinctrl: rockchip: create irq mapping in gpio_to

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Date:   Tue, 13 Oct 2020 14:37:31 +0800
From:   Jianqun Xu <jay.xu@...k-chips.com>
To:     linus.walleij@...aro.org, heiko@...ech.de
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        Jianqun Xu <jay.xu@...k-chips.com>
Subject: [PATCH v3 3/3] pinctrl: rockchip: create irq mapping in gpio_to_irq

Remove totally irq mappings create in probe, the gpio irq mapping will
be created when do
    gpio_to_irq ->
        rockchip_gpio_to_irq ->
            irq_create_mapping

This patch can speed up system boot on, also abandon many unused irq
mappings' create.

Reviewed-by: Heiko Stuebner <heiko@...ech.de>
Signed-off-by: Jianqun Xu <jay.xu@...k-chips.com>
---
 drivers/pinctrl/pinctrl-rockchip.c | 28 ++++++++++++----------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index a2f361aa6d05..70dc03af5699 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -3198,7 +3198,7 @@ static void rockchip_irq_demux(struct irq_desc *desc)
 
 		irq = __ffs(pend);
 		pend &= ~BIT(irq);
-		virq = irq_linear_revmap(bank->domain, irq);
+		virq = irq_find_mapping(bank->domain, irq);
 
 		if (!virq) {
 			dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
@@ -3377,7 +3377,7 @@ static int rockchip_interrupts_register(struct platform_device *pdev,
 	unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
 	struct irq_chip_generic *gc;
 	int ret;
-	int i, j;
+	int i;
 
 	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
 		if (!bank->valid) {
@@ -3404,7 +3404,7 @@ static int rockchip_interrupts_register(struct platform_device *pdev,
 
 		ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
 					 "rockchip_gpio_irq", handle_level_irq,
-					 clr, 0, IRQ_GC_INIT_MASK_CACHE);
+					 clr, 0, 0);
 		if (ret) {
 			dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
 				bank->name);
@@ -3413,14 +3413,6 @@ static int rockchip_interrupts_register(struct platform_device *pdev,
 			continue;
 		}
 
-		/*
-		 * Linux assumes that all interrupts start out disabled/masked.
-		 * Our driver only uses the concept of masked and always keeps
-		 * things enabled, so for us that's all masked and all enabled.
-		 */
-		writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTMASK);
-		writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTEN);
-
 		gc = irq_get_domain_generic_chip(bank->domain, 0);
 		gc->reg_base = bank->reg_base;
 		gc->private = bank;
@@ -3437,13 +3429,17 @@ static int rockchip_interrupts_register(struct platform_device *pdev,
 		gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
 		gc->wake_enabled = IRQ_MSK(bank->nr_pins);
 
+		/*
+		 * Linux assumes that all interrupts start out disabled/masked.
+		 * Our driver only uses the concept of masked and always keeps
+		 * things enabled, so for us that's all masked and all enabled.
+		 */
+		writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTMASK);
+		writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTEN);
+		gc->mask_cache = 0xffffffff;
+
 		irq_set_chained_handler_and_data(bank->irq,
 						 rockchip_irq_demux, bank);
-
-		/* map the gpio irqs here, when the clock is still running */
-		for (j = 0 ; j < 32 ; j++)
-			irq_create_mapping(bank->domain, j);
-
 		clk_disable(bank->clk);
 	}
 
-- 
2.17.1