spi: nxp-fspi: Support per spi-mem operation frequency switches

Every ->exec_op() call correctly configures the spi bus speed to the
maximum allowed frequency for the memory using the constant spi default
parameter. Since we can now have per-operation constraints, let's use
the value that comes from the spi-mem operation structure instead. In
case there is no specific limitation for this operation, the default spi
device value will be given anyway.

The per-operation frequency capability is thus advertised to the spi-mem
core.

Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://patch.msgid.link/20241224-winbond-6-11-rc1-quad-support-v2-12-ad218dbc406f@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c
index 1161b9e5a4dce633718e22022410b5e7435bb51c..bad6b30bab0ecb90d0aaf603b6de5bc834d19de6 100644 (file)
--- a/drivers/spi/spi-nxp-fspi.c
+++ b/drivers/spi/spi-nxp-fspi.c
@@ -705,9 +705,10 @@ static void nxp_fspi_dll_calibration(struct nxp_fspi *f)
  * Value for rest of the CS FLSHxxCR0 register would be zero.
  *
  */
-static void nxp_fspi_select_mem(struct nxp_fspi *f, struct spi_device *spi)
+static void nxp_fspi_select_mem(struct nxp_fspi *f, struct spi_device *spi,
+                               const struct spi_mem_op *op)
 {
-       unsigned long rate = spi->max_speed_hz;
+       unsigned long rate = op->max_freq;
        int ret;
        uint64_t size_kb;
 
@@ -931,7 +932,7 @@ static int nxp_fspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
                                   FSPI_STS0_ARB_IDLE, 1, POLL_TOUT, true);
        WARN_ON(err);
 
-       nxp_fspi_select_mem(f, mem->spi);
+       nxp_fspi_select_mem(f, mem->spi, op);
 
        nxp_fspi_prepare_lut(f, op);
        /*
@@ -1149,6 +1150,10 @@ static const struct spi_controller_mem_ops nxp_fspi_mem_ops = {
        .get_name = nxp_fspi_get_name,
 };
 
+static const struct spi_controller_mem_caps nxp_fspi_mem_caps = {
+       .per_op_freq = true,
+};
+
 static int nxp_fspi_probe(struct platform_device *pdev)
 {
        struct spi_controller *ctlr;
@@ -1246,6 +1251,7 @@ static int nxp_fspi_probe(struct platform_device *pdev)
        ctlr->bus_num = -1;
        ctlr->num_chipselect = NXP_FSPI_MAX_CHIPSELECT;
        ctlr->mem_ops = &nxp_fspi_mem_ops;
+       ctlr->mem_caps = &nxp_fspi_mem_caps;
 
        nxp_fspi_default_setup(f);