From: Haibo Chen <haibo.chen@nxp.com>
To: Han Xu <han.xu@nxp.com>, Yogesh Gaur <yogeshgaur.83@gmail.com>,
Mark Brown <broonie@kernel.org>, Frank Li <frank.li@nxp.com>
Cc: linux-spi@vger.kernel.org, imx@lists.linux.dev,
linux-kernel@vger.kernel.org, Haibo Chen <haibo.chen@nxp.com>
Subject: [PATCH v2 2/5] spi: spi-nxp-fspi: set back to dll override mode when clock rate < 100MHz
Date: Wed, 17 Sep 2025 15:27:07 +0800 [thread overview]
Message-ID: <20250917-flexspi-ddr-v2-2-bb9fe2a01889@nxp.com> (raw)
In-Reply-To: <20250917-flexspi-ddr-v2-0-bb9fe2a01889@nxp.com>
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>
---
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
next prev parent reply other threads:[~2025-09-17 7:27 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 ` Haibo Chen [this message]
2025-09-17 16:26 ` [PATCH v2 2/5] spi: spi-nxp-fspi: set back to dll override mode when clock rate < 100MHz Frank Li
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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