2ec98f5678
Core:
- When a gpio_chip request GPIOs from itself, it can now fully
control the line characteristics, both machine and consumer
flags. This makes a lot of sense, but took some time before I
figured out that this is how it has to work.
- Several smallish documentation fixes.
New drivers:
- The PCA953x driver now supports the TI TCA9539.
- The DaVinci driver now supports the K3 AM654 SoCs.
Driver improvements:
- Major overhaul and hardening of the OMAP driver by Russell
King.
- Starting to move some drivers to the new API passing irq_chip
along with the gpio_chip when adding the gpio_chip instead
of adding it separately.
Unrelated:
- Delete the FMC subsystem.
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Merge tag 'gpio-v5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"This is the big slew of GPIO changes for the v5.3 kernel cycle. This
is mostly incremental work this time.
Three important things:
- The FMC subsystem is deleted through my tree. This happens through
GPIO as its demise was discussed in relation to a patch decoupling
its GPIO implementation from the standard way of handling GPIO. As
it turns out, that is not the only subsystem it reimplements and
the authors think it is better do scratch it and start over using
the proper kernel subsystems than try to polish the rust shiny. See
the commit (ACKed by the maintainers) for details.
- Arnd made a small devres patch that was ACKed by Greg and goes into
the device core.
- SPDX header change colissions may happen, because at times I've
seen that quite a lot changed during the -rc:s in regards to SPDX.
(It is good stuff, tglx has me convinced, and it is worth the
occasional pain.)
Apart from this is is nothing controversial or problematic.
Summary:
Core:
- When a gpio_chip request GPIOs from itself, it can now fully
control the line characteristics, both machine and consumer flags.
This makes a lot of sense, but took some time before I figured out
that this is how it has to work.
- Several smallish documentation fixes.
New drivers:
- The PCA953x driver now supports the TI TCA9539.
- The DaVinci driver now supports the K3 AM654 SoCs.
Driver improvements:
- Major overhaul and hardening of the OMAP driver by Russell King.
- Starting to move some drivers to the new API passing irq_chip along
with the gpio_chip when adding the gpio_chip instead of adding it
separately.
Unrelated:
- Delete the FMC subsystem"
* tag 'gpio-v5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (87 commits)
Revert "gpio: tegra: Clean-up debugfs initialisation"
gpiolib: Use spinlock_t instead of struct spinlock
gpio: stp-xway: allow compile-testing
gpio: stp-xway: get rid of the #include <lantiq_soc.h> dependency
gpio: stp-xway: improve module clock error handling
gpio: stp-xway: simplify error handling in xway_stp_probe()
gpiolib: Clarify use of non-sleeping functions
gpiolib: Fix references to gpiod_[gs]et_*value_cansleep() variants
gpiolib: Document new gpio_chip.init_valid_mask field
Documentation: gpio: Fix reference to gpiod_get_array()
gpio: pl061: drop duplicate printing of device name
gpio: altera: Pass irqchip when adding gpiochip
gpio: siox: Use devm_ managed gpiochip
gpio: siox: Add struct device *dev helper variable
gpio: siox: Pass irqchip when adding gpiochip
drivers: gpio: amd-fch: make resource struct const
devres: allow const resource arguments
gpio: ath79: Pass irqchip when adding gpiochip
gpio: tegra: Clean-up debugfs initialisation
gpio: siox: Switch to IRQ_TYPE_NONE
...
85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2015 Pengutronix, Uwe Kleine-König <kernel@pengutronix.de>
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*/
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#include <linux/device.h>
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#define to_siox_device(_dev) container_of((_dev), struct siox_device, dev)
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struct siox_device {
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struct list_head node; /* node in smaster->devices */
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struct siox_master *smaster;
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struct device dev;
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const char *type;
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size_t inbytes;
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size_t outbytes;
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u8 statustype;
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u8 status_read_clean;
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u8 status_written;
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u8 status_written_lastcycle;
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bool connected;
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/* statistics */
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unsigned int watchdog_errors;
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unsigned int status_errors;
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struct kernfs_node *status_errors_kn;
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struct kernfs_node *watchdog_kn;
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struct kernfs_node *watchdog_errors_kn;
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struct kernfs_node *connected_kn;
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};
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bool siox_device_synced(struct siox_device *sdevice);
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bool siox_device_connected(struct siox_device *sdevice);
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struct siox_driver {
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int (*probe)(struct siox_device *sdevice);
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int (*remove)(struct siox_device *sdevice);
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void (*shutdown)(struct siox_device *sdevice);
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/*
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* buf is big enough to hold sdev->inbytes - 1 bytes, the status byte
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* is in the scope of the framework.
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*/
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int (*set_data)(struct siox_device *sdevice, u8 status, u8 buf[]);
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/*
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* buf is big enough to hold sdev->outbytes - 1 bytes, the status byte
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* is in the scope of the framework
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*/
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int (*get_data)(struct siox_device *sdevice, const u8 buf[]);
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struct device_driver driver;
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};
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static inline struct siox_driver *to_siox_driver(struct device_driver *driver)
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{
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if (driver)
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return container_of(driver, struct siox_driver, driver);
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else
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return NULL;
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}
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int __siox_driver_register(struct siox_driver *sdriver, struct module *owner);
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static inline int siox_driver_register(struct siox_driver *sdriver)
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{
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return __siox_driver_register(sdriver, THIS_MODULE);
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}
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static inline void siox_driver_unregister(struct siox_driver *sdriver)
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{
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return driver_unregister(&sdriver->driver);
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}
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/*
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* module_siox_driver() - Helper macro for drivers that don't do
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* anything special in module init/exit. This eliminates a lot of
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* boilerplate. Each module may only use this macro once, and
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* calling it replaces module_init() and module_exit()
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*/
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#define module_siox_driver(__siox_driver) \
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module_driver(__siox_driver, siox_driver_register, \
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siox_driver_unregister)
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