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spi: spi-nxp-fspi: re-config the clock rate when operation require new clock rate

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Current operation contain the max_freq, so new coming operation may use
new clock rate, need to re-config the clock rate to match the requirement.

Fixes: 26851cf65f ("spi: nxp-fspi: Support per spi-mem operation frequency switches")
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Link: https://patch.msgid.link/20250922-fspi-fix-v1-1-ff4315359d31@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Haibo Chen
2025-09-22 16:47:13 +08:00
committed by Mark Brown
parent 4f38da1f02
commit a89103f671
1 changed files with 13 additions and 3 deletions
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16
drivers/spi/spi-nxp-fspi.c
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@@ -404,6 +404,8 @@ struct nxp_fspi {
#define FSPI_NEED_INIT BIT(0)
#define FSPI_DTR_MODE BIT(1)
int flags;
/* save the previous operation clock rate */
unsigned long pre_op_rate;
};
static inline int needs_ip_only(struct nxp_fspi *f)
@@ -780,11 +782,17 @@ static void nxp_fspi_select_mem(struct nxp_fspi *f, struct spi_device *spi,
uint64_t size_kb;
/*
* Return, if previously selected target device is same as current
* requested target device. Also the DTR or STR mode do not change.
* Return when following condition all meet,
* 1, if previously selected target device is same as current
* requested target device.
* 2, the DTR or STR mode do not change.
* 3, previous operation max rate equals current one.
*
* For other case, need to re-config.
*/
if ((f->selected == spi_get_chipselect(spi, 0)) &&
(!!(f->flags & FSPI_DTR_MODE) == op_is_dtr))
(!!(f->flags & FSPI_DTR_MODE) == op_is_dtr) &&
(f->pre_op_rate == op->max_freq))
return;
/* Reset FLSHxxCR0 registers */
@@ -832,6 +840,8 @@ static void nxp_fspi_select_mem(struct nxp_fspi *f, struct spi_device *spi,
else
nxp_fspi_dll_override(f);
f->pre_op_rate = op->max_freq;
f->selected = spi_get_chipselect(spi, 0);
}