From: Keith Packard <keithp@keithp.com>
Date: Sun, 9 Apr 2017 19:54:57 +0000 (-0700)
Subject: altos: Document a few more SPI mode bits in VGA driver
X-Git-Tag: 1.7~46
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=83c1e4e8ca684f555cba252efd3882f811d8e154

altos: Document a few more SPI mode bits in VGA driver

Just comment changes

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/drivers/ao_vga.c b/src/drivers/ao_vga.c
index 2d05d522..909e3109 100644
--- a/src/drivers/ao_vga.c
+++ b/src/drivers/ao_vga.c
@@ -139,13 +139,13 @@ ao_vga_init(void)
 			(0 << STM_SPI_CR1_CRCEN) |		/* CRC disabled */
 			(0 << STM_SPI_CR1_CRCNEXT) |
 			(1 << STM_SPI_CR1_DFF) |
-			(0 << STM_SPI_CR1_RXONLY) |
+			(0 << STM_SPI_CR1_RXONLY) |		/* transmit, not receive */
 			(0 << STM_SPI_CR1_SSM) |        	/* Software SS handling */
 			(1 << STM_SPI_CR1_SSI) |		/*  ... */
 			(1 << STM_SPI_CR1_LSBFIRST) |		/* Little endian */
 			(1 << STM_SPI_CR1_SPE) |		/* Enable SPI unit */
 			(0 << STM_SPI_CR1_BR) |			/* baud rate to pclk/2 */
-			(0 << STM_SPI_CR1_MSTR) |
+			(0 << STM_SPI_CR1_MSTR) |		/* slave */
 			(0 << STM_SPI_CR1_CPOL) |		/* Format 0 */
 			(0 << STM_SPI_CR1_CPHA));
 	stm_spi1.cr2 = ((0 << STM_SPI_CR2_TXEIE) |