From bf4661bcb0e70da975b7513006b204f01fdbc0f7 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 27 Feb 2020 17:21:54 +0200 Subject: [PATCH] dm: serial: Add clock member to struct serial_device_info Some callers of serial_getinfo() would like to know the UART base clock speed in order to make decision what to pass to OS in some cases. In particular, ACPI SPCR table expects only certain base clock speed and thus we have to act accordingly. Signed-off-by: Andy Shevchenko Reviewed-by: Simon Glass Reviewed-by: Bin Meng --- drivers/serial/sandbox.c | 1 + include/serial.h | 3 +++ test/dm/serial.c | 1 + 3 files changed, 5 insertions(+) diff --git a/drivers/serial/sandbox.c b/drivers/serial/sandbox.c index 1af5cc12f3..545ff3f747 100644 --- a/drivers/serial/sandbox.c +++ b/drivers/serial/sandbox.c @@ -198,6 +198,7 @@ static int sandbox_serial_getinfo(struct udevice *dev, .reg_width = 1, .reg_offset = 0, .reg_shift = 0, + .clock = SERIAL_DEFAULT_CLOCK, }; if (!serial_info) diff --git a/include/serial.h b/include/serial.h index 104f34ff91..54b21a0470 100644 --- a/include/serial.h +++ b/include/serial.h @@ -139,6 +139,7 @@ enum adr_space_type { * @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 + * @clock: UART base clock speed in Hz * @baudrate: baud rate */ struct serial_device_info { @@ -148,10 +149,12 @@ struct serial_device_info { u8 reg_width; u8 reg_offset; u8 reg_shift; + unsigned int clock; unsigned int baudrate; }; #define SERIAL_DEFAULT_ADDRESS 0xBADACCE5 +#define SERIAL_DEFAULT_CLOCK (16 * 115200) /** * struct struct dm_serial_ops - Driver model serial operations diff --git a/test/dm/serial.c b/test/dm/serial.c index 3d741a8c36..c6be6ab7ab 100644 --- a/test/dm/serial.c +++ b/test/dm/serial.c @@ -29,6 +29,7 @@ static int dm_test_serial(struct unit_test_state *uts) ut_assertok(serial_getinfo(dev_serial, &info_serial)); ut_assert(info_serial.type == SERIAL_CHIP_UNKNOWN); ut_assert(info_serial.addr == SERIAL_DEFAULT_ADDRESS); + ut_assert(info_serial.clock == SERIAL_DEFAULT_CLOCK); /* * test with a parameter which is NULL pointer */ -- 2.39.5