diff options
| author | Furquan Shaikh <furquan@chromium.org> | 2016-12-01 07:12:32 -0800 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2016-12-05 03:29:04 +0100 |
| commit | 94f8699d447ef94df339d318b836b664273e89ff (patch) | |
| tree | 17223ccd5906a8087251beabc943786cade37ee4 /src/soc/nvidia/tegra124/spi.c | |
| parent | 36b81af9e8ecea2bf58aae9a421720ed10f61b82 (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/soc/nvidia/tegra124/spi.c')
| -rw-r--r-- | src/soc/nvidia/tegra124/spi.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/soc/nvidia/tegra124/spi.c b/src/soc/nvidia/tegra124/spi.c index 0cb48657d6..5d8084fbdf 100644 --- a/src/soc/nvidia/tegra124/spi.c +++ b/src/soc/nvidia/tegra124/spi.c @@ -209,7 +209,7 @@ static unsigned int tegra_spi_speed(unsigned int bus) return 50000000; } -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; @@ -232,7 +232,7 @@ 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; @@ -719,8 +719,8 @@ 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; @@ -798,6 +798,12 @@ 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); @@ -806,6 +812,7 @@ int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave) slave->bus = channel->slave.bus; slave->cs = channel->slave.cs; + slave->ctrlr = &spi_ctrlr; return 0; } |