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dm: serial: Introduce ->getinfo() callback

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New callback will give a necessary information to fill up ACPI SPCR table,
for example. Maybe used later for other purposes.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Change ADR_SPACE_SYSTEM_IO to SERIAL_ADDRESS_SPACE_IO to fix build error:
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Andy Shevchenko 2018-11-20 23:52:33 +02:00 • committed by Simon Glass
parent ac7f5db9dc
commit d5bb4f862b
5 changed files with 90 additions and 0 deletions
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40
include/serial.h
View file

@ -118,6 +118,39 @@ enum serial_stop {
SERIAL_8_BITS << SERIAL_BITS_SHIFT | \
SERIAL_ONE_STOP << SERIAL_STOP_SHIFT)
enum serial_chip_type {
SERIAL_CHIP_UNKNOWN = -1,
SERIAL_CHIP_16550_COMPATIBLE,
};
enum adr_space_type {
SERIAL_ADDRESS_SPACE_MEMORY = 0,
SERIAL_ADDRESS_SPACE_IO,
};
/**
* struct serial_device_info - structure to hold serial device info
*
* @type: type of the UART chip
* @addr_space: address space to access the registers
* @addr: physical address of the registers
* @reg_width: size (in bytes) of the IO accesses to the registers
* @reg_offset: offset to apply to the @addr from the start of the registers
* @reg_shift: quantity to shift the register offsets by
* @baudrate: baud rate
*/
struct serial_device_info {
enum serial_chip_type type;
enum adr_space_type addr_space;
ulong addr;
u8 reg_width;
u8 reg_offset;
u8 reg_shift;
unsigned int baudrate;
};
#define SERIAL_DEFAULT_ADDRESS 0xBADACCE5
/**
* struct struct dm_serial_ops - Driver model serial operations
*
@ -219,6 +252,13 @@ struct dm_serial_ops {
* @return 0 if OK, -ve on error
*/
int (*setconfig)(struct udevice *dev, uint serial_config);
/**
* getinfo() - Get serial device information
*
* @dev: Device pointer
* @info: struct serial_device_info to fill
*/
int (*getinfo)(struct udevice *dev, struct serial_device_info *info);
};
/**