From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/drivers/gpio/gpio-em.c | 133 ++++++++++++++++----------------------------
1 files changed, 49 insertions(+), 84 deletions(-)
diff --git a/kernel/drivers/gpio/gpio-em.c b/kernel/drivers/gpio/gpio-em.c
index 982e699..17a243c 100644
--- a/kernel/drivers/gpio/gpio-em.c
+++ b/kernel/drivers/gpio/gpio-em.c
@@ -1,20 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Emma Mobile GPIO Support - GIO
*
* Copyright (C) 2012 Magnus Damm
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
@@ -271,61 +259,54 @@
.xlate = irq_domain_xlate_twocell,
};
+static void em_gio_irq_domain_remove(void *data)
+{
+ struct irq_domain *domain = data;
+
+ irq_domain_remove(domain);
+}
+
static int em_gio_probe(struct platform_device *pdev)
{
struct em_gio_priv *p;
- struct resource *io[2], *irq[2];
struct gpio_chip *gpio_chip;
struct irq_chip *irq_chip;
- const char *name = dev_name(&pdev->dev);
+ struct device *dev = &pdev->dev;
+ const char *name = dev_name(dev);
unsigned int ngpios;
- int ret;
+ int irq[2], ret;
- p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
- if (!p) {
- ret = -ENOMEM;
- goto err0;
- }
+ p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
p->pdev = pdev;
platform_set_drvdata(pdev, p);
spin_lock_init(&p->sense_lock);
- io[0] = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- io[1] = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- irq[0] = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- irq[1] = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+ irq[0] = platform_get_irq(pdev, 0);
+ if (irq[0] < 0)
+ return irq[0];
- if (!io[0] || !io[1] || !irq[0] || !irq[1]) {
- dev_err(&pdev->dev, "missing IRQ or IOMEM\n");
- ret = -EINVAL;
- goto err0;
- }
+ irq[1] = platform_get_irq(pdev, 1);
+ if (irq[1] < 0)
+ return irq[1];
- p->base0 = devm_ioremap_nocache(&pdev->dev, io[0]->start,
- resource_size(io[0]));
- if (!p->base0) {
- dev_err(&pdev->dev, "failed to remap low I/O memory\n");
- ret = -ENXIO;
- goto err0;
- }
+ p->base0 = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(p->base0))
+ return PTR_ERR(p->base0);
- p->base1 = devm_ioremap_nocache(&pdev->dev, io[1]->start,
- resource_size(io[1]));
- if (!p->base1) {
- dev_err(&pdev->dev, "failed to remap high I/O memory\n");
- ret = -ENXIO;
- goto err0;
- }
+ p->base1 = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(p->base1))
+ return PTR_ERR(p->base1);
- if (of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios)) {
- dev_err(&pdev->dev, "Missing ngpios OF property\n");
- ret = -EINVAL;
- goto err0;
+ if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+ dev_err(dev, "Missing ngpios OF property\n");
+ return -EINVAL;
}
gpio_chip = &p->gpio_chip;
- gpio_chip->of_node = pdev->dev.of_node;
+ gpio_chip->of_node = dev->of_node;
gpio_chip->direction_input = em_gio_direction_input;
gpio_chip->get = em_gio_get;
gpio_chip->direction_output = em_gio_direction_output;
@@ -334,13 +315,13 @@
gpio_chip->request = em_gio_request;
gpio_chip->free = em_gio_free;
gpio_chip->label = name;
- gpio_chip->parent = &pdev->dev;
+ gpio_chip->parent = dev;
gpio_chip->owner = THIS_MODULE;
gpio_chip->base = -1;
gpio_chip->ngpio = ngpios;
irq_chip = &p->irq_chip;
- irq_chip->name = name;
+ irq_chip->name = "gpio-em";
irq_chip->irq_mask = em_gio_irq_disable;
irq_chip->irq_unmask = em_gio_irq_enable;
irq_chip->irq_set_type = em_gio_irq_set_type;
@@ -348,49 +329,34 @@
irq_chip->irq_release_resources = em_gio_irq_relres;
irq_chip->flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;
- p->irq_domain = irq_domain_add_simple(pdev->dev.of_node, ngpios, 0,
+ p->irq_domain = irq_domain_add_simple(dev->of_node, ngpios, 0,
&em_gio_irq_domain_ops, p);
if (!p->irq_domain) {
- ret = -ENXIO;
- dev_err(&pdev->dev, "cannot initialize irq domain\n");
- goto err0;
+ dev_err(dev, "cannot initialize irq domain\n");
+ return -ENXIO;
}
- if (devm_request_irq(&pdev->dev, irq[0]->start,
- em_gio_irq_handler, 0, name, p)) {
- dev_err(&pdev->dev, "failed to request low IRQ\n");
- ret = -ENOENT;
- goto err1;
+ ret = devm_add_action_or_reset(dev, em_gio_irq_domain_remove,
+ p->irq_domain);
+ if (ret)
+ return ret;
+
+ if (devm_request_irq(dev, irq[0], em_gio_irq_handler, 0, name, p)) {
+ dev_err(dev, "failed to request low IRQ\n");
+ return -ENOENT;
}
- if (devm_request_irq(&pdev->dev, irq[1]->start,
- em_gio_irq_handler, 0, name, p)) {
- dev_err(&pdev->dev, "failed to request high IRQ\n");
- ret = -ENOENT;
- goto err1;
+ if (devm_request_irq(dev, irq[1], em_gio_irq_handler, 0, name, p)) {
+ dev_err(dev, "failed to request high IRQ\n");
+ return -ENOENT;
}
- ret = gpiochip_add_data(gpio_chip, p);
+ ret = devm_gpiochip_add_data(dev, gpio_chip, p);
if (ret) {
- dev_err(&pdev->dev, "failed to add GPIO controller\n");
- goto err1;
+ dev_err(dev, "failed to add GPIO controller\n");
+ return ret;
}
- return 0;
-
-err1:
- irq_domain_remove(p->irq_domain);
-err0:
- return ret;
-}
-
-static int em_gio_remove(struct platform_device *pdev)
-{
- struct em_gio_priv *p = platform_get_drvdata(pdev);
-
- gpiochip_remove(&p->gpio_chip);
-
- irq_domain_remove(p->irq_domain);
return 0;
}
@@ -402,7 +368,6 @@
static struct platform_driver em_gio_device_driver = {
.probe = em_gio_probe,
- .remove = em_gio_remove,
.driver = {
.name = "em_gio",
.of_match_table = em_gio_dt_ids,
--
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