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Just the preparation of supportting DTR mode. Signed-off-by: Haibo Chen --- drivers/spi/spi-nxp-fspi.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c index 848fa9319e36d65e8152931324b8e34eb162f5d3..a1c9ad03379682dc1fc2908fbd8= 3e1ae8e91588f 100644 --- a/drivers/spi/spi-nxp-fspi.c +++ b/drivers/spi/spi-nxp-fspi.c @@ -674,6 +674,17 @@ static void nxp_fspi_dll_calibration(struct nxp_fspi *= f) dev_warn(f->dev, "DLL lock failed, please fix it!\n"); } =20 +/* + * Config the DLL register to default value, enable the target 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. + */ +static void nxp_fspi_dll_override(struct nxp_fspi *f) +{ + fspi_writel(f, FSPI_DLLACR_OVRDEN, f->iobase + FSPI_DLLACR); + fspi_writel(f, FSPI_DLLBCR_OVRDEN, f->iobase + FSPI_DLLBCR); +} + /* * In FlexSPI controller, flash access is based on value of FSPI_FLSHXXCR0 * register and start base address of the target device. @@ -756,6 +767,8 @@ static void nxp_fspi_select_mem(struct nxp_fspi *f, str= uct spi_device *spi, */ if (rate > 100000000) nxp_fspi_dll_calibration(f); + else + nxp_fspi_dll_override(f); =20 f->selected =3D spi_get_chipselect(spi, 0); } @@ -1071,13 +1084,7 @@ static int nxp_fspi_default_setup(struct nxp_fspi *f) /* Disable the module */ fspi_writel(f, FSPI_MCR0_MDIS, base + FSPI_MCR0); =20 - /* - * Config the DLL register to default value, enable the target 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); + nxp_fspi_dll_override(f); =20 /* enable module */ fspi_writel(f, FSPI_MCR0_AHB_TIMEOUT(0xFF) | --=20 2.34.1