From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/pinctrl/pinmux.c | 61 ++++++++++++++++--------------
1 files changed, 33 insertions(+), 28 deletions(-)
diff --git a/kernel/drivers/pinctrl/pinmux.c b/kernel/drivers/pinctrl/pinmux.c
index 5780442..bab888f 100644
--- a/kernel/drivers/pinctrl/pinmux.c
+++ b/kernel/drivers/pinctrl/pinmux.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Core driver for the pin muxing portions of the pin control subsystem
*
@@ -8,8 +9,6 @@
* Author: Linus Walleij <linus.walleij@linaro.org>
*
* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
- *
- * License terms: GNU General Public License (GPL) version 2
*/
#define pr_fmt(fmt) "pinmux core: " fmt
@@ -72,7 +71,33 @@
}
/**
+ * pinmux_can_be_used_for_gpio() - check if a specific pin
+ * is either muxed to a different function or used as gpio.
+ *
+ * @pctldev: the associated pin controller device
+ * @pin: the pin number in the global pin space
+ *
+ * Controllers not defined as strict will always return true,
+ * menaning that the gpio can be used.
+ */
+bool pinmux_can_be_used_for_gpio(struct pinctrl_dev *pctldev, unsigned pin)
+{
+ struct pin_desc *desc = pin_desc_get(pctldev, pin);
+ const struct pinmux_ops *ops = pctldev->desc->pmxops;
+
+ /* Can't inspect pin, assume it can be used */
+ if (!desc || !ops)
+ return true;
+
+ if (ops->strict && desc->mux_usecount)
+ return false;
+
+ return !(ops->strict && !!desc->gpio_owner);
+}
+
+/**
* pin_request() - request a single pin to be muxed in, typically for GPIO
+ * @pctldev: the associated pin controller device
* @pin: the pin number in the global pin space
* @owner: a representation of the owner of this pin; typically the device
* name that controls its mux function, or the requested GPIO name
@@ -231,6 +256,7 @@
* @pctldev: pin controller device affected
* @pin: the pin to mux in for GPIO
* @range: the applicable GPIO range
+ * @gpio: number of requested GPIO
*/
int pinmux_request_gpio(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
@@ -644,37 +670,16 @@
setting->data.mux.func);
}
-static int pinmux_functions_open(struct inode *inode, struct file *file)
-{
- return single_open(file, pinmux_functions_show, inode->i_private);
-}
-
-static int pinmux_pins_open(struct inode *inode, struct file *file)
-{
- return single_open(file, pinmux_pins_show, inode->i_private);
-}
-
-static const struct file_operations pinmux_functions_ops = {
- .open = pinmux_functions_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static const struct file_operations pinmux_pins_ops = {
- .open = pinmux_pins_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(pinmux_functions);
+DEFINE_SHOW_ATTRIBUTE(pinmux_pins);
void pinmux_init_device_debugfs(struct dentry *devroot,
struct pinctrl_dev *pctldev)
{
debugfs_create_file("pinmux-functions", S_IFREG | S_IRUGO,
- devroot, pctldev, &pinmux_functions_ops);
+ devroot, pctldev, &pinmux_functions_fops);
debugfs_create_file("pinmux-pins", S_IFREG | S_IRUGO,
- devroot, pctldev, &pinmux_pins_ops);
+ devroot, pctldev, &pinmux_pins_fops);
}
#endif /* CONFIG_DEBUG_FS */
@@ -742,7 +747,7 @@
/**
* pinmux_generic_get_function() - returns a function based on the number
* @pctldev: pin controller device
- * @group_selector: function number
+ * @selector: function number
*/
struct function_desc *pinmux_generic_get_function(struct pinctrl_dev *pctldev,
unsigned int selector)
--
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