# HG changeset patch
# User Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
# Date 1689382863 14400
#      Fri Jul 14 21:01:03 2023 -0400
# Node ID bcc6efe49275c833b397f9116bea157e7d382c9e
# Parent  d5b2c4c9ce69b960582cc1ec9600a35b2c34d179
arch: expand SPI API to handle slave mode of operation

Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>

diff --git a/arch/atmega48p_spi.h b/arch/atmega48p_spi.h
--- a/arch/atmega48p_spi.h
+++ b/arch/atmega48p_spi.h
@@ -118,6 +118,17 @@
 	__spi_init(mode, clock, bitorder, interrupt, true);
 }
 
+static inline void spi_init_slave(enum spi_mode mode,
+				  enum spi_bitorder bitorder,
+				  bool interrupt)
+{
+	/*
+	 * The clock divider setting doesn't matter.  The actual clock is
+	 * provided externally.
+	 */
+	__spi_init(mode, SPI_CLOCK_DIV4, bitorder, interrupt, false);
+}
+
 /* transmit a single byte, CS is left up to the caller */
 static inline void spi_tx_byte(uint8_t byte)
 {