From: Keith Packard <keithp@keithp.com>
Date: Mon, 20 May 2013 03:27:05 +0000 (-0700)
Subject: altos/lpc: Reset SPI device at startup time
X-Git-Tag: 1.2.9.4~189^2~7
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=c1f01cd4406063191a51cb68fc4634eabfc60fc2

altos/lpc: Reset SPI device at startup time

Wasn't doing the reset sequence correctly (write 0, then write 1).

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

diff --git a/src/lpc/ao_spi_lpc.c b/src/lpc/ao_spi_lpc.c
index ff107e40..c3587698 100644
--- a/src/lpc/ao_spi_lpc.c
+++ b/src/lpc/ao_spi_lpc.c
@@ -199,7 +199,8 @@ ao_spi_init(void)
 	/* Turn on the clock */
 	lpc_scb.ssp1clkdiv = 1;
 
-	/* De-assert reset */
+	/* Reset the device */
+	lpc_scb.presetctrl &= ~(1 << LPC_SCB_PRESETCTRL_SSP1_RST_N);
 	lpc_scb.presetctrl |= (1 << LPC_SCB_PRESETCTRL_SSP1_RST_N);
 	ao_spi_channel_init(1);
 #endif /* HAS_SPI_1 */