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From: Frank Li <Frank.li@nxp.com>
To: Haibo Chen <haibo.chen@nxp.com>
Cc: Han Xu <han.xu@nxp.com>, Yogesh Gaur <yogeshgaur.83@gmail.com>,
	Mark Brown <broonie@kernel.org>,
	linux-spi@vger.kernel.org, imx@lists.linux.dev,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 2/5] spi: spi-nxp-fspi: set back to dll override mode when clock rate < 100MHz
Date: Wed, 17 Sep 2025 12:26:35 -0400	[thread overview]
Message-ID: <aMrhO+//We97QeLL@lizhi-Precision-Tower-5810> (raw)
In-Reply-To: <20250917-flexspi-ddr-v2-2-bb9fe2a01889@nxp.com>

On Wed, Sep 17, 2025 at 03:27:07PM +0800, Haibo Chen wrote:
> Preparation of supportting DTR mode. In nor suspend, driver will disable
> DTR mode, and enable DTR mode back in nor resume. This require the flexspi
> driver has the ability to set back to dll override mode in STR mode when
> clock rate < 100MHz.
>
> Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
> ---
Reviewed-by: Frank Li <Frank.Li@nxp.com>

>  drivers/spi/spi-nxp-fspi.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c
> index db4b92490de957580c6298baeb8b68a310c23615..a1c9ad03379682dc1fc2908fbd83e1ae8e91588f 100644
> --- a/drivers/spi/spi-nxp-fspi.c
> +++ b/drivers/spi/spi-nxp-fspi.c
> @@ -767,6 +767,8 @@ static void nxp_fspi_select_mem(struct nxp_fspi *f, struct spi_device *spi,
>  	 */
>  	if (rate > 100000000)
>  		nxp_fspi_dll_calibration(f);
> +	else
> +		nxp_fspi_dll_override(f);
>
>  	f->selected = spi_get_chipselect(spi, 0);
>  }
>
> --
> 2.34.1
>

  reply	other threads:[~2025-09-17 16:26 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-17  7:27 [PATCH v2 0/5] spi: spi-nxp-fspi: add DTR mode support Haibo Chen
2025-09-17  7:27 ` [PATCH v2 1/5] spi: spi-nxp-fspi: extract function nxp_fspi_dll_override() Haibo Chen
2025-09-17 16:24   ` Frank Li
2025-09-17  7:27 ` [PATCH v2 2/5] spi: spi-nxp-fspi: set back to dll override mode when clock rate < 100MHz Haibo Chen
2025-09-17 16:26   ` Frank Li [this message]
2025-09-17  7:27 ` [PATCH v2 3/5] spi: spi-nxp-fspi: Add the DDR LUT command support Haibo Chen
2025-09-17  7:27 ` [PATCH v2 4/5] spi: spi-nxp-fspi: add the support for sample data from DQS pad Haibo Chen
2025-09-17 16:28   ` Frank Li
2025-09-17  7:27 ` [PATCH v2 5/5] spi: spi-nxp-fspi: Add OCT-DTR mode support Haibo Chen
2025-09-17 16:30   ` Frank Li
2025-09-17 18:09     ` Mark Brown
2025-09-19 16:03 ` [PATCH v2 0/5] spi: spi-nxp-fspi: add DTR " Mark Brown

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