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Message-ID: <20230703094518.53755-3-mmkurbanov@sberdevices.ru>
Date: Mon, 3 Jul 2023 12:45:18 +0300
From: Martin Kurbanov <mmkurbanov@...rdevices.ru>
To: Mark Brown <broonie@...nel.org>,
Neil Armstrong <neil.armstrong@...aro.org>
CC: <linux-spi@...r.kernel.org>, <linux-amlogic@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <kernel@...rdevices.ru>,
Martin Kurbanov <mmkurbanov@...rdevices.ru>
Subject: [PATCH v1 2/2] 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@...rdevices.ru>
---
drivers/spi/spi-amlogic-spifc-a1.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/spi/spi-amlogic-spifc-a1.c b/drivers/spi/spi-amlogic-spifc-a1.c
index 0c21917e4caf..7ef2a0448990 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 +236,20 @@ 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)
+ spifc->curr_speed_hz = freq;
+
+ return ret;
+}
+
static int amlogic_spifc_a1_exec_op(struct spi_mem *mem,
const struct spi_mem_op *op)
{
@@ -243,6 +258,10 @@ 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));
--
2.40.0
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