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41 lines
1.5 KiB
Diff
41 lines
1.5 KiB
Diff
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From cf658ebc86b3e22c0b77e136fbbf19b580c7c256 Mon Sep 17 00:00:00 2001
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From: Stefan Wahren <wahrenst@gmx.net>
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Date: Sun, 21 Jul 2019 16:01:36 +0200
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Subject: [PATCH] pinctrl: bcm2835: Add support for BCM2711 pull-up
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functionality
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commit e38a9a437fb93ddafab5030165e4c6a3a5021669 upstream.
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The BCM2711 has a new way of selecting the pull-up/pull-down setting
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for a GPIO pin. The registers used for the BCM2835, GP_PUD and
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GP_PUDCLKn0, are no longer connected. A new set of registers,
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GP_GPIO_PUP_PDN_CNTRL_REGx must be used. This commit will add
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a new compatible string "brcm,bcm2711-gpio" and the kernel
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driver will use it to select which method is used to select
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pull-up/pull-down.
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This patch based on a patch by Al Cooper which was intended for the
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BCM7211. This is a bugfixed and improved version.
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Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
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Acked-by: Eric Anholt <eric@anholt.net>
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---
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drivers/pinctrl/bcm/pinctrl-bcm2835.c | 6 ++++++
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1 file changed, 6 insertions(+)
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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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@@ -1168,6 +1168,12 @@ static int bcm2835_pinctrl_probe(struct
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(const struct pinconf_ops *)match->data;
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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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