[U-Boot] [PATCH v3 2/2] ppc4xx: Add PPC4xx SPI helpers to Sequoia

Steven A. Falco
2008-12-09T16:26:46Z

This patch adds helper routines needed in support of the PPC4xx SPI driver.

Signed-off-by: Steven A. Falco <sfalco@harris.com>
---

Changed CONFIG constant to CONFIG_PPC4xx_SPI.

board/amcc/sequoia/sequoia.c | 20 ++++++++++++++++++++
include/configs/sequoia.h | 4 ++++
2 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/board/amcc/sequoia/sequoia.c b/board/amcc/sequoia/sequoia.c
index d6668e2..080ee1e 100644
--- a/board/amcc/sequoia/sequoia.c
+++ b/board/amcc/sequoia/sequoia.c
@@ -26,6 +26,7 @@
#include <libfdt.h>
#include <fdt_support.h>
#include <ppc4xx.h>
+#include <spi.h>
#include <asm/gpio.h>
#include <asm/processor.h>
#include <asm/io.h>
@@ -513,3 +514,22 @@ int post_hotkeys_pressed(void)
return 0; /* No hotkeys supported */
}
#endif /* CONFIG_POST */
+
+#if defined(CONFIG_PPC4xx_SPI)
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+ return bus == 0 && cs >= 0 && cs < 64;
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+ /* Assumes chip-selects are active-low. */
+ gpio_write_bit(slave->cs, 0);
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+ gpio_write_bit(slave->cs, 1);
+}
+#endif /* CONFIG_PPC4xx_SPI */
+
diff --git a/include/configs/sequoia.h b/include/configs/sequoia.h
index 9321bdc..417fda1 100644
--- a/include/configs/sequoia.h
+++ b/include/configs/sequoia.h
@@ -236,6 +236,10 @@
#define CONFIG_SYS_DTT_LOW_TEMP -30
#define CONFIG_SYS_DTT_HYSTERESIS 3

+/* Define these if you are using the SPI port. */
+#undef CONFIG_HARD_SPI
+#undef CONFIG_PPC4xx_SPI
+
/*
* Default environment variables
*/
--
1.6.0.2