Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Imx9 lpuart flow control #307

Merged
merged 2 commits into from
Oct 29, 2024
Merged

Imx9 lpuart flow control #307

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
adf17f7
imx9/serial: Clean up the flow control code
jlaitine Oct 25, 2024
5d4d296
imx9/serial: Take proper use of RX/TX FIFOs, clean up interrupt servi…
jlaitine Oct 28, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
24 changes: 12 additions & 12 deletions arch/arm64/src/imx9/hardware/imx9_lpuart.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -287,22 +287,22 @@

/* LPUART Watermark Register (WATER) */

#define LPUART_WATER_TXWATER_SHIFT (0) /* Bits 0-1: Transmit Watermark (TXWATER) */
#define LPUART_WATER_TXWATER_MASK (0x03 << LPUART_WATER_TXWATER_SHIFT)
#define LPUART_WATER_TXWATER_SHIFT (0) /* Bits 0-3: Transmit Watermark (TXWATER) */
#define LPUART_WATER_TXWATER_MASK (0x0f << LPUART_WATER_TXWATER_SHIFT)
# define LPUART_WATER_TXWATER(n) ((n) << LPUART_WATER_TXWATER_SHIFT)
/* Bits 2-7: Reserved */
#define LPUART_WATER_TXCOUNT_SHIFT (8) /* Bits 8-10: Transmit Counter (TXCOUNT) */
#define LPUART_WATER_TXCOUNT_MASK (0x07 << LPUART_WATER_TXCOUNT_SHIFT)
/* Bits 4-7: Reserved */
#define LPUART_WATER_TXCOUNT_SHIFT (8) /* Bits 8-12: Transmit Counter (TXCOUNT) */
#define LPUART_WATER_TXCOUNT_MASK (0x1f << LPUART_WATER_TXCOUNT_SHIFT)
# define LPUART_WATER_TXCOUNT(n) ((n) << LPUART_WATER_TXCOUNT_SHIFT)
/* Bits 11-15: Reserved */
#define LPUART_WATER_RXWATER_SHIFT (16) /* Bits 16-17: Receive Watermark (RXWATER) */
#define LPUART_WATER_RXWATER_MASK (0x03 << LPUART_WATER_RXWATER_SHIFT)
/* Bits 13-15: Reserved */
#define LPUART_WATER_RXWATER_SHIFT (16) /* Bits 16-19: Receive Watermark (RXWATER) */
#define LPUART_WATER_RXWATER_MASK (0x0f << LPUART_WATER_RXWATER_SHIFT)
# define LPUART_WATER_RXWATER(n) ((n) << LPUART_WATER_RXWATER_SHIFT)
/* Bits 18-23: Reserved */
#define LPUART_WATER_RXCOUNT_SHIFT (24) /* Bits 24-26: Receive Counter (RXCOUNT) */
#define LPUART_WATER_RXCOUNT_MASK (0x07 << LPUART_WATER_RXCOUNT_SHIFT)
/* Bits 20-23: Reserved */
#define LPUART_WATER_RXCOUNT_SHIFT (24) /* Bits 24-28: Receive Counter (RXCOUNT) */
#define LPUART_WATER_RXCOUNT_MASK (0x1f << LPUART_WATER_RXCOUNT_SHIFT)
# define LPUART_WATER_RXCOUNT(n) ((n) << LPUART_WATER_RXCOUNT_SHIFT)
/* Bits 27-31: Reserved */
/* Bits 29-31: Reserved */

/* Data read-only Register (DATARO) */

Expand Down
5 changes: 5 additions & 0 deletions arch/arm64/src/imx9/imx9_lowputc.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -387,6 +387,11 @@ int imx9_lpuart_configure(uint32_t base, int uartnum,
regval &= ~LPUART_GLOBAL_RST;
putreg32(regval, base + IMX9_LPUART_GLOBAL_OFFSET);

/* Enable RX and TX FIFOs */

putreg32(LPUART_FIFO_RXFE | LPUART_FIFO_TXFE,
base + IMX9_LPUART_FIFO_OFFSET);

/* Construct MODIR register */

regval = 0;
Expand Down
Loading
Loading