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| author |  Haibo Chen <haibo.chen@nxp.com>
| 2023-03-22 17:04:50 +0800 |
|---|---|---|
| committer |  Mark Brown <broonie@kernel.org>
| 2023-03-22 13:17:42 +0000 |
| commit | 1ab09f1d070c4774175dab95e55d2b72c2a054ab (patch) | |
| tree | 969bbfbda8c73db1f88e12debfb825438199b065 | |
| parent | spi: sprd: Convert to platform remove callback (diff) | |
| download | linux-1ab09f1d070c4774175dab95e55d2b72c2a054ab.tar.gz linux-1ab09f1d070c4774175dab95e55d2b72c2a054ab.tar.bz2 linux-1ab09f1d070c4774175dab95e55d2b72c2a054ab.zip | |
spi: spi-nxp-fspi: correct the comment for the DLL config
Current DLL config is just to use the default setting, this means
enable the DLL override mode, and use 1 fixed delay cell in the
DLL delay chain, not means "reset" the DLL, so correct this to
avoid confuse.
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Link: https://lore.kernel.org/r/20230322090451.3179431-1-haibo.chen@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | drivers/spi/spi-nxp-fspi.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c index 76168cc1e00d..6735c22b9137 100644 --- a/drivers/spi/spi-nxp-fspi.c +++ b/drivers/spi/spi-nxp-fspi.c @@ -997,7 +997,11 @@ static int nxp_fspi_default_setup(struct nxp_fspi *f) /* Disable the module */ fspi_writel(f, FSPI_MCR0_MDIS, base + FSPI_MCR0); - /* Reset the DLL register to default value */ + /* + * Config the DLL register to default value, enable the slave clock delay + * line delay cell override mode, and use 1 fixed delay cell in DLL delay + * chain, this is the suggested setting when clock rate < 100MHz. + */ fspi_writel(f, FSPI_DLLACR_OVRDEN, base + FSPI_DLLACR); fspi_writel(f, FSPI_DLLBCR_OVRDEN, base + FSPI_DLLBCR); |