linux/drivers/tty/serdev, branch v6.8

serdev: Remove usage of the deprecated ida_simple_xx() API

2023-12-15T13:20:06Z

ida_alloc() and ida_free() should be preferred to the deprecated ida_simple_get() and ida_simple_remove(). This is less verbose. Signed-off-by: Christophe JAILLET Link: https://lore.kernel.org/r/d20d3ac106bac6b7cabe39f22ad00ac86910e0a5.1702230342.git.christophe.jaillet@wanadoo.fr Signed-off-by: Greg Kroah-Hartman

tty: serdev: convert to u8 and size_t

2023-12-08T11:02:38Z

Switch character types to u8 and sizes to size_t. To conform to characters/sizes in the rest of the tty layer. This patch converts struct serdev_device_ops hooks and its instantiations. Signed-off-by: "Jiri Slaby (SUSE)" Cc: Rob Herring Acked-by: Johan Hovold Link: https://lore.kernel.org/r/20231206073712.17776-24-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

tty: serdev: convert to u8 and size_t in serdev_controller_ops

2023-12-08T11:02:38Z

Switch character types to u8 and sizes to size_t. To conform to characters/sizes in the rest of the tty layer. In this patch, only struct serdev_controller_ops hooks. The rest will follow. Signed-off-by: "Jiri Slaby (SUSE)" Cc: Rob Herring Link: https://lore.kernel.org/r/20231206073712.17776-23-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

serial: core: Move tty and serdev to be children of serial core port device

2023-11-25T07:23:16Z

Let's move tty and serdev controller to be children of the serial core port device. This way the runtime PM usage count of a child device propagates to the serial hardware device. The tty and serdev devices are associated with a specific serial port of a serial hardware controller device, and we now have serial core hierarchy of controllers and ports. The tty device moves happily with just a change of the parent device and update of device_find_child() handling. The serdev device init needs some changes to separate the serial hardware controller device from the parent device. With this change the tty devices move under sysfs similar to this x86_64 qemu example of a diff of "find /sys -name ttyS*": /sys/class/tty/ttyS0 /sys/class/tty/ttyS3 /sys/class/tty/ttyS1 -/sys/devices/pnp0/00:04/tty/ttyS0 -/sys/devices/platform/serial8250/tty/ttyS2 -/sys/devices/platform/serial8250/tty/ttyS3 -/sys/devices/platform/serial8250/tty/ttyS1 +/sys/devices/pnp0/00:04/00:04:0/00:04:0.0/tty/ttyS0 +/sys/devices/platform/serial8250/serial8250:0/serial8250:0.3/tty/ttyS3 +/sys/devices/platform/serial8250/serial8250:0/serial8250:0.1/tty/ttyS1 +/sys/devices/platform/serial8250/serial8250:0/serial8250:0.2/tty/ttyS2 If a serdev device is used instead of a tty, it moves in a similar way. Suggested-by: Johan Hovold Cc: Maximilian Luz Cc: Rob Herring Signed-off-by: Tony Lindgren Link: https://lore.kernel.org/r/20231113080758.30346-1-tony@atomide.com Signed-off-by: Greg Kroah-Hartman

serdev: Replace custom code with device_match_acpi_handle()

2023-10-27T11:04:11Z

Since driver core provides a generic device_match_acpi_handle() we may replace the custom code with it. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20231024124115.3598090-4-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serdev: Simplify devm_serdev_device_open() function

2023-10-27T11:04:11Z

Use devm_add_action_or_reset() instead of devres_alloc() and devres_add(), which works the same. This will simplify the code. There is no functional changes. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20231024124115.3598090-3-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serdev: Make use of device_set_node()

2023-10-27T11:04:11Z

Use device_set_node() instead of assigning ctrl->dev.of_node directly because it also sets the firmware node. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20231024124115.3598090-2-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman

tty: make counts in tty_port_client_operations hooks size_t

2023-08-11T19:12:44Z

The counts in tty_port_client_operations hooks' are currently represented by all 'int', 'unsigned int', and 'size_t'. Unify them all to unsigned 'size_t' for clarity. Note that size_t is used already in tty_buffer.c. So, eventually, it is spread for counts everywhere and this is the beginning. So the two changes namely: * ::receive_buf() is called from tty_ldisc_receive_buf(). And that expects values ">= 0" from ::receive_buf(), so switch its rettype to size_t is fine. tty_ldisc_receive_buf() types will be changed separately. * ::lookahead_buf()'s count comes from lookahead_bufs() and is already 'unsigned int'. Signed-off-by: "Jiri Slaby (SUSE)" Cc: Rob Herring Link: https://lore.kernel.org/r/20230810091510.13006-11-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

tty: make tty_port_client_operations operate with u8

2023-08-11T19:12:44Z

The parameters are already unsigned chars. So make them explicitly u8s, as the rest is going to be unified to u8 eventually too. Signed-off-by: "Jiri Slaby (SUSE)" Cc: Rob Herring Link: https://lore.kernel.org/r/20230810091510.13006-10-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

serdev: Add method to assert break signal over tty UART port

2023-04-24T04:51:25Z

Adds serdev_device_break_ctl() and an implementation for ttyport. This function simply calls the break_ctl in tty layer, which can assert a break signal over UART-TX line, if the tty and the underlying platform and UART peripheral supports this operation. Signed-off-by: Neeraj Sanjay Kale Reviewed-by: Simon Horman Signed-off-by: Luiz Augusto von Dentz