From: hongzha1 <hongzhan.chen@intel.com>
To: xenomai@xenomai.org
Subject: [PATCH 2/3] drivers/gpio: core: introduce helper to find gpiochip
Date: Tue, 13 Apr 2021 22:16:24 -0400 [thread overview]
Message-ID: <20210414021625.24725-2-hongzhan.chen@intel.com> (raw)
In-Reply-To: <20210414021625.24725-1-hongzhan.chen@intel.com>
To find gpiochip for non-OF platforms like x86
Signed-off-by: hongzha1 <hongzhan.chen@intel.com>
diff --git a/include/cobalt/kernel/rtdm/gpio.h b/include/cobalt/kernel/rtdm/gpio.h
index 00055ec0a..c5fb20f25 100644
--- a/include/cobalt/kernel/rtdm/gpio.h
+++ b/include/cobalt/kernel/rtdm/gpio.h
@@ -61,6 +61,9 @@ int rtdm_gpiochip_add_by_name(struct rtdm_gpio_chip *rgc,
int rtdm_gpiochip_post_event(struct rtdm_gpio_chip *rgc,
unsigned int offset);
+int rtdm_gpiochip_find(struct device_node *from,
+ const char *label, int type);
+
#ifdef CONFIG_OF
int rtdm_gpiochip_scan_of(struct device_node *from,
diff --git a/kernel/drivers/gpio/gpio-core.c b/kernel/drivers/gpio/gpio-core.c
index 600ef9789..b3d801fa1 100644
--- a/kernel/drivers/gpio/gpio-core.c
+++ b/kernel/drivers/gpio/gpio-core.c
@@ -520,6 +520,29 @@ int rtdm_gpiochip_add_by_name(struct rtdm_gpio_chip *rgc,
}
EXPORT_SYMBOL_GPL(rtdm_gpiochip_add_by_name);
+int rtdm_gpiochip_find(struct device_node *from, const char *label,
+ int type)
+{
+ struct rtdm_gpio_chip *rgc;
+ struct gpio_chip *chip;
+ int ret = -ENODEV;
+
+ if (!rtdm_available())
+ return -ENOSYS;
+
+ chip = find_chip_by_name(label);
+ if (chip == NULL)
+ return ret;
+
+ ret = 0;
+ rgc = rtdm_gpiochip_alloc(chip, type);
+ if (IS_ERR(rgc))
+ ret = PTR_ERR(rgc);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(rtdm_gpiochip_find);
+
#ifdef CONFIG_OF
#include <linux/of_platform.h>
--
2.17.1
next prev parent reply other threads:[~2021-04-14 2:16 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-14 2:16 [PATCH 1/3] rtdm/testing: latmus: introduce latmus driver hongzha1
2021-04-14 2:16 ` hongzha1 [this message]
2021-04-14 2:16 ` [PATCH 3/3] testsuite/latmus: introduce latmus benchmark hongzha1
2021-04-14 9:08 ` [PATCH 1/3] rtdm/testing: latmus: introduce latmus driver Jan Kiszka
2021-04-15 0:56 ` Chen, Hongzhan
2021-04-15 7:47 ` Philippe Gerum
2021-08-30 6:45 [PATCH 0/3] add support for cherryview gpio controller driver Hongzhan Chen
2021-08-30 6:45 ` [PATCH 2/3] drivers/gpio: core: Introduce helper to find gpiochip Hongzhan Chen
2021-08-31 5:07 [PATCH V2 0/3] add support for cherryview gpio controller driver Hongzhan Chen
2021-08-31 5:07 ` [PATCH 2/3] drivers/gpio: core: Introduce helper to find gpiochip Hongzhan Chen
2021-08-31 6:47 ` Jan Kiszka
2021-08-31 7:07 ` Chen, Hongzhan
2021-08-31 7:14 ` Jan Kiszka
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