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authorFurquan Shaikh <furquan@chromium.org>2016-12-01 07:12:32 -0800
committerFurquan Shaikh <furquan@google.com>2016-12-05 03:29:04 +0100
commit94f8699d447ef94df339d318b836b664273e89ff (patch)
tree17223ccd5906a8087251beabc943786cade37ee4 /src/southbridge/amd/sb700
parent36b81af9e8ecea2bf58aae9a421720ed10f61b82 (diff)
spi: Define and use spi_ctrlr structure
1. Define a new structure spi_ctrlr that allows platforms to define callbacks for spi operations (claim bus, release bus, transfer). 2. Add a new member (pointer to spi_ctrlr structure) in spi_slave structure which will be initialized by call to spi_setup_slave. 3. Define spi_claim_bus, spi_release_bus and spi_xfer in spi-generic.c which will make appropriate calls to ctrlr functions. BUG=chrome-os-partner:59832 BRANCH=None TEST=Compiles successfully Change-Id: Icb2326e3aab1e8f4bef53f553f82b3836358c55e Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17684 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/southbridge/amd/sb700')
-rw-r--r--src/southbridge/amd/sb700/spi.c32
1 files changed, 13 insertions, 19 deletions
diff --git a/src/southbridge/amd/sb700/spi.c b/src/southbridge/amd/sb700/spi.c
index fca401cbbf..2e16ca8d5c 100644
--- a/src/southbridge/amd/sb700/spi.c
+++ b/src/southbridge/amd/sb700/spi.c
@@ -65,25 +65,7 @@ static void execute_command(void)
(read8((void *)(spibar+3)) & 0x80));
}
-int spi_claim_bus(const struct spi_slave *slave)
-{
- /* Handled internally by the SB700 */
- return 0;
-}
-
-void spi_release_bus(const struct spi_slave *slave)
-{
- /* Handled internally by the SB700 */
-}
-
-int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
-{
- slave->bus = bus;
- slave->cs = cs;
- return 0;
-}
-
-int spi_xfer(const struct spi_slave *slave, const void *dout,
+static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout,
size_t bytesout, void *din, size_t bytesin)
{
/* First byte is cmd which cannot be sent through the FIFO. */
@@ -135,3 +117,15 @@ int spi_xfer(const struct spi_slave *slave, const void *dout,
return 0;
}
+
+static const struct spi_ctrlr spi_ctrlr = {
+ .xfer = spi_ctrlr_xfer,
+};
+
+int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
+{
+ slave->bus = bus;
+ slave->cs = cs;
+ slave->ctrlr = &spi_ctrlr;
+ return 0;
+}