linux-kernel - [PATCH] spi: nxp-fspi: reset the FLSHxCR1 registers

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Message-Id: <20230906183254.235847-1-han.xu@nxp.com>
Date:   Wed,  6 Sep 2023 13:32:54 -0500
From:   Han Xu <han.xu@....com>
To:     Han Xu <han.xu@....com>, Haibo Chen <haibo.chen@....com>,
        Yogesh Gaur <yogeshgaur.83@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] spi: nxp-fspi: reset the FLSHxCR1 registers

Reset the FLSHxCR1 registers to default value. ROM may set the register
value and it affects the SPI NAND normal functions.

Signed-off-by: Han Xu <han.xu@....com>
---
 drivers/spi/spi-nxp-fspi.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c
index 45a4acc95661..c964f41dcc42 100644
--- a/drivers/spi/spi-nxp-fspi.c
+++ b/drivers/spi/spi-nxp-fspi.c
@@ -1084,6 +1084,13 @@ static int nxp_fspi_default_setup(struct nxp_fspi *f)
 	fspi_writel(f, FSPI_AHBCR_PREF_EN | FSPI_AHBCR_RDADDROPT,
 		 base + FSPI_AHBCR);
 
+	/* Reset the FLSHxCR1 registers. */
+	reg = FSPI_FLSHXCR1_TCSH(0x3) | FSPI_FLSHXCR1_TCSS(0x3);
+	fspi_writel(f, reg, base + FSPI_FLSHA1CR1);
+	fspi_writel(f, reg, base + FSPI_FLSHA2CR1);
+	fspi_writel(f, reg, base + FSPI_FLSHB1CR1);
+	fspi_writel(f, reg, base + FSPI_FLSHB2CR1);
+
 	/* AHB Read - Set lut sequence ID for all CS. */
 	fspi_writel(f, SEQID_LUT, base + FSPI_FLSHA1CR2);
 	fspi_writel(f, SEQID_LUT, base + FSPI_FLSHA2CR2);
-- 
2.34.1