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spi: amlogic-spifc-a1: add support for max_speed_hz

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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>
This commit is contained in:
Martin Kurbanov 2023-07-06 14:03:31 +03:00 committed by Mark Brown
parent 68a199640d
commit 8d4d4c6813
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 20 additions and 0 deletions
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20
drivers/spi/spi-amlogic-spifc-a1.c
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@ -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));