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a1383655cf
Tested on bcm2710 (Raspberry Pi 3B). Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
89 lines
2.8 KiB
Diff
89 lines
2.8 KiB
Diff
From 27cb8bf0442f677380a1df93b93b7589b7ce5243 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 6 Jan 2020 14:05:42 +0000
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Subject: [PATCH] pinctrl: bcm2835: Change init order for gpio hogs
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pinctrl-bcm2835 is a combined pinctrl/gpio driver. Currently the gpio
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side is registered first, but this breaks gpio hogs (which are
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configured during gpiochip_add_data). Part of the hog initialisation
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is a call to pinctrl_gpio_request, and since the pinctrl driver hasn't
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yet been registered this results in an -EPROBE_DEFER from which it can
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never recover.
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Change the initialisation sequence to register the pinctrl driver
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first.
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See: https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=260600
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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drivers/pinctrl/bcm/pinctrl-bcm2835.c | 40 ++++++++++++---------------
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1 file changed, 17 insertions(+), 23 deletions(-)
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--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
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+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
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@@ -1135,9 +1135,25 @@ static int bcm2835_pinctrl_probe(struct
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raw_spin_lock_init(&pc->irq_lock[i]);
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}
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+ match = of_match_node(bcm2835_pinctrl_match, pdev->dev.of_node);
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+ if (match) {
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+ bcm2835_pinctrl_desc.confops =
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+ (const struct pinconf_ops *)match->data;
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+ }
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+
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+ pc->pctl_dev = devm_pinctrl_register(dev, &bcm2835_pinctrl_desc, pc);
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+ if (IS_ERR(pc->pctl_dev))
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+ return PTR_ERR(pc->pctl_dev);
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+
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+ pc->gpio_range = bcm2835_pinctrl_gpio_range;
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+ pc->gpio_range.base = pc->gpio_chip.base;
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+ pc->gpio_range.gc = &pc->gpio_chip;
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+ pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
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+
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err = devm_gpiochip_add_data(dev, &pc->gpio_chip, pc);
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if (err) {
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dev_err(dev, "could not add GPIO chip\n");
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+ pinctrl_remove_gpio_range(pc->pctl_dev, &pc->gpio_range);
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return err;
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}
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@@ -1145,6 +1161,7 @@ static int bcm2835_pinctrl_probe(struct
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0, handle_level_irq, IRQ_TYPE_NONE);
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if (err) {
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dev_info(dev, "could not add irqchip\n");
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+ pinctrl_remove_gpio_range(pc->pctl_dev, &pc->gpio_range);
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return err;
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}
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@@ -1167,29 +1184,6 @@ static int bcm2835_pinctrl_probe(struct
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bcm2835_gpio_irq_handler);
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}
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- match = of_match_node(bcm2835_pinctrl_match, pdev->dev.of_node);
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- if (match) {
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- bcm2835_pinctrl_desc.confops =
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- (const struct pinconf_ops *)match->data;
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- }
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-
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- match = of_match_node(bcm2835_pinctrl_match, pdev->dev.of_node);
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- if (match) {
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- bcm2835_pinctrl_desc.confops =
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- (const struct pinconf_ops *)match->data;
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- }
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-
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- pc->pctl_dev = devm_pinctrl_register(dev, &bcm2835_pinctrl_desc, pc);
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- if (IS_ERR(pc->pctl_dev)) {
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- gpiochip_remove(&pc->gpio_chip);
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- return PTR_ERR(pc->pctl_dev);
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- }
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-
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- pc->gpio_range = bcm2835_pinctrl_gpio_range;
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- pc->gpio_range.base = pc->gpio_chip.base;
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- pc->gpio_range.gc = &pc->gpio_chip;
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- pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
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-
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return 0;
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}
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