diff options
| author | Martin Kurbanov <mmkurbanov@sberdevices.ru> | 2023-07-06 14:03:31 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-07-10 00:51:31 +0300 |
| commit | 8d4d4c6813fea356ef79f182d8f4d82793c8f64b (patch) | |
| tree | 556a32e7e3f05f101a398fac84c3608e29f6a201 /drivers/spi/spi-amlogic-spifc-a1.c | |
| parent | 68a199640d28ecd507bc53bccb5cd98f5330fafc (diff) | |
| download | linux-8d4d4c6813fea356ef79f182d8f4d82793c8f64b.tar.xz | |
spi: amlogic-spifc-a1: add support for max_speed_hz
This patch sets the clock rate (spi_transfer->max_speed_hz) from the
amlogic_spifc_a1_exec_op().
Signed-off-by: Martin Kurbanov <mmkurbanov@sberdevices.ru>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230706110331.19794-3-mmkurbanov@sberdevices.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-amlogic-spifc-a1.c')
| -rw-r--r-- | drivers/spi/spi-amlogic-spifc-a1.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/spi/spi-amlogic-spifc-a1.c b/drivers/spi/spi-amlogic-spifc-a1.c index a92e4fc23396..605e9e40455c 100644 --- a/drivers/spi/spi-amlogic-spifc-a1.c +++ b/drivers/spi/spi-amlogic-spifc-a1.c @@ -107,6 +107,7 @@ struct amlogic_spifc_a1 { struct clk *clk; struct device *dev; void __iomem *base; + u32 curr_speed_hz; }; static int amlogic_spifc_a1_request(struct amlogic_spifc_a1 *spifc, bool read) @@ -235,6 +236,21 @@ static int amlogic_spifc_a1_write(struct amlogic_spifc_a1 *spifc, return amlogic_spifc_a1_request(spifc, false); } +static int amlogic_spifc_a1_set_freq(struct amlogic_spifc_a1 *spifc, u32 freq) +{ + int ret; + + if (freq == spifc->curr_speed_hz) + return 0; + + ret = clk_set_rate(spifc->clk, freq); + if (ret) + return ret; + + spifc->curr_speed_hz = freq; + return 0; +} + static int amlogic_spifc_a1_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) { @@ -243,6 +259,10 @@ static int amlogic_spifc_a1_exec_op(struct spi_mem *mem, size_t data_size = op->data.nbytes; int ret; + ret = amlogic_spifc_a1_set_freq(spifc, mem->spi->max_speed_hz); + if (ret) + return ret; + amlogic_spifc_a1_user_init(spifc); amlogic_spifc_a1_set_cmd(spifc, SPIFC_A1_USER_CMD(op)); |