dev/simple-uart.c: Implement missing purge functions

bd806075 · Oskar Szakinnis · Frederik Pfautsch · 176b78b8 · bd806075
Commit bd806075 authored May 02, 2024 by Oskar Szakinnis Committed by Frederik Pfautsch May 02, 2024
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simple_uart.c dev/simple_uart.c +6 -4

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--- a/dev/simple_uart.c
+++ b/dev/simple_uart.c
@@ -93,14 +93,16 @@ int suart_get_tx_fifo_count( struct simple_uart_device *dev )

 int suart_purge_tx_fifo( struct simple_uart_device *dev )
 {
-	// fixme
-	return -1;
+	uint32_t r = readl( dev->base + UART_REG_CR );
+	writel((r | UART_CR_TX_FIFO_PURGE), dev->base + UART_REG_CR );
+	return 0;
 }

 int suart_purge_rx_fifo( struct simple_uart_device *dev )
 {
-	// fixme
-	return -1;
+	uint32_t r = readl( dev->base + UART_REG_CR );
+	writel((r | UART_CR_RX_FIFO_PURGE), dev->base + UART_REG_CR );
+	return 0;
 }

 int suart_is_fifo_supported( struct simple_uart_device *dev )