Unverified Commit 8d4d4c68 authored by Martin Kurbanov's avatar Martin Kurbanov Committed by Mark Brown
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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: default avatarMartin Kurbanov <mmkurbanov@sberdevices.ru>
Reviewed-by: default avatarNeil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230706110331.19794-3-mmkurbanov@sberdevices.ru


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 68a19964

drivers/spi/spi-amlogic-spifc-a1.c

+20 −0
Original line number Diff line number Diff line
@@ -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));