Documentation: serial: dedup kernel-doc for uart functions
Some of the serial (uart_*) functions are documented twice. Once as kernel-doc along their sources and once in Documentation. So deduplicate these texts, merge them into kernel-doc in the sources, and link them using kernel-doc: from the Documentation. To be properly linked and rendered, tabulators had to be removed from the comments. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220728061056.20799-2-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby
Greg Kroah-Hartman
parent
e60a723368
commit
c4bd17a6dd
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@ -69,85 +69,11 @@ uart_ops
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Other functions
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---------------
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uart_update_timeout(port,cflag,baud)
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Update the frame timing information according to the number of bits,
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parity, stop bits and baud rate. The FIFO drain timeout is derived
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from the frame timing information.
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Locking: caller is expected to take port->lock
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Interrupts: n/a
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uart_get_baud_rate(port,termios,old,min,max)
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Return the numeric baud rate for the specified termios, taking
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account of the special 38400 baud "kludge". The B0 baud rate
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is mapped to 9600 baud.
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If the baud rate is not within min..max, then if old is non-NULL,
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the original baud rate will be tried. If that exceeds the
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min..max constraint, 9600 baud will be returned. termios will
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be updated to the baud rate in use.
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Note: min..max must always allow 9600 baud to be selected.
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Locking: caller dependent.
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Interrupts: n/a
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uart_get_divisor(port,baud)
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Return the divisor (baud_base / baud) for the specified baud
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rate, appropriately rounded.
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If 38400 baud and custom divisor is selected, return the
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custom divisor instead.
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Locking: caller dependent.
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Interrupts: n/a
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uart_match_port(port1,port2)
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This utility function can be used to determine whether two
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uart_port structures describe the same port.
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Locking: n/a
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Interrupts: n/a
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uart_write_wakeup(port)
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A driver is expected to call this function when the number of
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characters in the transmit buffer have dropped below a threshold.
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Locking: port->lock should be held.
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Interrupts: n/a
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uart_register_driver(drv)
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Register a uart driver with the core driver. We in turn register
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with the tty layer, and initialise the core driver per-port state.
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drv->port should be NULL, and the per-port structures should be
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registered using uart_add_one_port after this call has succeeded.
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Locking: none
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Interrupts: enabled
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uart_unregister_driver()
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Remove all references to a driver from the core driver. The low
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level driver must have removed all its ports via the
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uart_remove_one_port() if it registered them with uart_add_one_port().
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Locking: none
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Interrupts: enabled
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**uart_suspend_port()**
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**uart_resume_port()**
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**uart_add_one_port()**
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**uart_remove_one_port()**
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.. kernel-doc:: drivers/tty/serial/serial_core.c
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:identifiers: uart_update_timeout uart_get_baud_rate uart_get_divisor
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uart_match_port uart_write_wakeup uart_register_driver
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uart_unregister_driver uart_suspend_port uart_resume_port
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uart_add_one_port uart_remove_one_port
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Other notes
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-----------
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@ -97,9 +97,16 @@ static inline struct uart_port *uart_port_check(struct uart_state *state)
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return state->uart_port;
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}
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/*
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* This routine is used by the interrupt handler to schedule processing in
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* the software interrupt portion of the driver.
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/**
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* uart_write_wakeup - schedule write processing
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* @port: port to be processed
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*
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* This routine is used by the interrupt handler to schedule processing in the
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* software interrupt portion of the driver. A driver is expected to call this
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* function when the number of characters in the transmit buffer have dropped
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* below a threshold.
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*
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* Locking: @port->lock should be held
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*/
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void uart_write_wakeup(struct uart_port *port)
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{
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@ -327,14 +334,16 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state)
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}
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/**
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* uart_update_timeout - update per-port frame timing information.
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* @port: uart_port structure describing the port
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* @cflag: termios cflag value
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* @baud: speed of the port
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* uart_update_timeout - update per-port frame timing information
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* @port: uart_port structure describing the port
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* @cflag: termios cflag value
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* @baud: speed of the port
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*
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* Set the port frame timing information from which the FIFO timeout
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* value is derived. The @cflag value should reflect the actual hardware
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* settings.
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* Set the @port frame timing information from which the FIFO timeout value is
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* derived. The @cflag value should reflect the actual hardware settings as
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* number of bits, parity, stop bits and baud rate is taken into account here.
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*
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* Locking: caller is expected to take @port->lock
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*/
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void
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uart_update_timeout(struct uart_port *port, unsigned int cflag,
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@ -349,23 +358,25 @@ uart_update_timeout(struct uart_port *port, unsigned int cflag,
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EXPORT_SYMBOL(uart_update_timeout);
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/**
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* uart_get_baud_rate - return baud rate for a particular port
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* @port: uart_port structure describing the port in question.
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* @termios: desired termios settings.
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* @old: old termios (or NULL)
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* @min: minimum acceptable baud rate
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* @max: maximum acceptable baud rate
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* uart_get_baud_rate - return baud rate for a particular port
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* @port: uart_port structure describing the port in question.
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* @termios: desired termios settings
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* @old: old termios (or %NULL)
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* @min: minimum acceptable baud rate
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* @max: maximum acceptable baud rate
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*
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* Decode the termios structure into a numeric baud rate,
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* taking account of the magic 38400 baud rate (with spd_*
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* flags), and mapping the %B0 rate to 9600 baud.
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* Decode the termios structure into a numeric baud rate, taking account of the
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* magic 38400 baud rate (with spd_* flags), and mapping the %B0 rate to 9600
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* baud.
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*
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* If the new baud rate is invalid, try the old termios setting.
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* If it's still invalid, we try 9600 baud.
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* If the new baud rate is invalid, try the @old termios setting. If it's still
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* invalid, we try 9600 baud.
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*
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* Update the @termios structure to reflect the baud rate
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* we're actually going to be using. Don't do this for the case
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* where B0 is requested ("hang up").
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* The @termios structure is updated to reflect the baud rate we're actually
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* going to be using. Don't do this for the case where B0 is requested ("hang
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* up").
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*
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* Locking: caller dependent
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*/
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unsigned int
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uart_get_baud_rate(struct uart_port *port, struct ktermios *termios,
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@ -450,11 +461,17 @@ uart_get_baud_rate(struct uart_port *port, struct ktermios *termios,
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EXPORT_SYMBOL(uart_get_baud_rate);
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/**
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* uart_get_divisor - return uart clock divisor
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* @port: uart_port structure describing the port.
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* @baud: desired baud rate
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* uart_get_divisor - return uart clock divisor
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* @port: uart_port structure describing the port
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* @baud: desired baud rate
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*
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* Calculate the uart clock divisor for the port.
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* Calculate the divisor (baud_base / baud) for the specified @baud,
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* appropriately rounded.
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*
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* If 38400 baud and custom divisor is selected, return the custom divisor
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* instead.
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*
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* Locking: caller dependent
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*/
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unsigned int
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uart_get_divisor(struct uart_port *port, unsigned int baud)
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@ -2683,17 +2700,19 @@ static const struct tty_port_operations uart_port_ops = {
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};
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/**
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* uart_register_driver - register a driver with the uart core layer
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* @drv: low level driver structure
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* uart_register_driver - register a driver with the uart core layer
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* @drv: low level driver structure
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*
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* Register a uart driver with the core driver. We in turn register
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* with the tty layer, and initialise the core driver per-port state.
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* Register a uart driver with the core driver. We in turn register with the
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* tty layer, and initialise the core driver per-port state.
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*
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* We have a proc file in /proc/tty/driver which is named after the
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* normal driver.
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* We have a proc file in /proc/tty/driver which is named after the normal
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* driver.
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*
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* drv->port should be NULL, and the per-port structures should be
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* registered using uart_add_one_port after this call has succeeded.
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* @drv->port should be %NULL, and the per-port structures should be registered
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* using uart_add_one_port() after this call has succeeded.
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*
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* Locking: none, Interrupts: enabled
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*/
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int uart_register_driver(struct uart_driver *drv)
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{
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@ -2757,13 +2776,14 @@ out:
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EXPORT_SYMBOL(uart_register_driver);
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/**
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* uart_unregister_driver - remove a driver from the uart core layer
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* @drv: low level driver structure
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* uart_unregister_driver - remove a driver from the uart core layer
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* @drv: low level driver structure
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*
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* Remove all references to a driver from the core driver. The low
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* level driver must have removed all its ports via the
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* uart_remove_one_port() if it registered them with uart_add_one_port().
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* (ie, drv->port == NULL)
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* Remove all references to a driver from the core driver. The low level
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* driver must have removed all its ports via the uart_remove_one_port() if it
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* registered them with uart_add_one_port(). (I.e. @drv->port is %NULL.)
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*
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* Locking: none, Interrupts: enabled
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*/
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void uart_unregister_driver(struct uart_driver *drv)
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{
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@ -3012,16 +3032,15 @@ static const struct attribute_group tty_dev_attr_group = {
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};
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/**
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* uart_add_one_port - attach a driver-defined port structure
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* @drv: pointer to the uart low level driver structure for this port
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* @uport: uart port structure to use for this port.
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* uart_add_one_port - attach a driver-defined port structure
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* @drv: pointer to the uart low level driver structure for this port
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* @uport: uart port structure to use for this port.
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*
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* Context: task context, might sleep
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* Context: task context, might sleep
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*
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* This allows the driver to register its own uart_port structure
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* with the core driver. The main purpose is to allow the low
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* level uart drivers to expand uart_port, rather than having yet
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* more levels of structures.
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* This allows the driver @drv to register its own uart_port structure with the
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* core driver. The main purpose is to allow the low level uart drivers to
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* expand uart_port, rather than having yet more levels of structures.
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*/
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int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
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{
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@ -3116,15 +3135,14 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
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EXPORT_SYMBOL(uart_add_one_port);
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/**
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* uart_remove_one_port - detach a driver defined port structure
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* @drv: pointer to the uart low level driver structure for this port
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* @uport: uart port structure for this port
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* uart_remove_one_port - detach a driver defined port structure
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* @drv: pointer to the uart low level driver structure for this port
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* @uport: uart port structure for this port
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*
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* Context: task context, might sleep
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* Context: task context, might sleep
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*
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* This unhooks (and hangs up) the specified port structure from the
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* core driver. No further calls will be made to the low-level code
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* for this port.
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* This unhooks (and hangs up) the specified port structure from the core
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* driver. No further calls will be made to the low-level code for this port.
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*/
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int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
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{
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@ -3196,8 +3214,13 @@ out:
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}
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EXPORT_SYMBOL(uart_remove_one_port);
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/*
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* Are the two ports equivalent?
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/**
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* uart_match_port - are the two ports equivalent?
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* @port1: first port
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* @port2: second port
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*
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* This utility function can be used to determine whether two uart_port
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* structures describe the same port.
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*/
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bool uart_match_port(const struct uart_port *port1,
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const struct uart_port *port2)
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