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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/soc/nvidia/tegra210
parent36b81af9e8ecea2bf58aae9a421720ed10f61b82 (diff)
downloadcoreboot-94f8699d447ef94df339d318b836b664273e89ff.tar.xz
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/soc/nvidia/tegra210')
-rw-r--r--src/soc/nvidia/tegra210/spi.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/src/soc/nvidia/tegra210/spi.c b/src/soc/nvidia/tegra210/spi.c
index 3a2dd17230..292135542a 100644
--- a/src/soc/nvidia/tegra210/spi.c
+++ b/src/soc/nvidia/tegra210/spi.c
@@ -208,7 +208,7 @@ static struct tegra_spi_channel * const to_tegra_spi(int bus) {
return &tegra_spi_channels[bus - 1];
}
-int spi_claim_bus(const struct spi_slave *slave)
+static int spi_ctrlr_claim_bus(const struct spi_slave *slave)
{
struct tegra_spi_regs *regs = to_tegra_spi(slave->bus)->regs;
u32 val;
@@ -231,7 +231,7 @@ int spi_claim_bus(const struct spi_slave *slave)
return 0;
}
-void spi_release_bus(const struct spi_slave *slave)
+static void spi_ctrlr_release_bus(const struct spi_slave *slave)
{
struct tegra_spi_regs *regs = to_tegra_spi(slave->bus)->regs;
u32 val;
@@ -755,8 +755,8 @@ unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len)
return buf_len;
}
-int spi_xfer(const struct spi_slave *slave, const void *dout,
- size_t out_bytes, void *din, size_t in_bytes)
+static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout,
+ size_t out_bytes, void *din, size_t in_bytes)
{
struct tegra_spi_channel *spi = to_tegra_spi(slave->bus);
u8 *out_buf = (u8 *)dout;
@@ -834,6 +834,12 @@ int spi_xfer(const struct spi_slave *slave, const void *dout,
return ret;
}
+static const struct spi_ctrlr spi_ctrlr = {
+ .claim_bus = spi_ctrlr_claim_bus,
+ .release_bus = spi_ctrlr_release_bus,
+ .xfer = spi_ctrlr_xfer,
+};
+
int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
{
struct tegra_spi_channel *channel = to_tegra_spi(bus);
@@ -842,6 +848,7 @@ int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
slave->cs = channel->slave.cs;
slave->bus = channel->slave.bus;
+ slave->ctrlr = &spi_ctrlr;
return 0;
}