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Thu, 23 Oct 2025 10:59:28 -0700 (PDT) From: Alex Elder To: han.xu@nxp.com, broonie@kernel.org, p.zabel@pengutronix.de Cc: dlan@gentoo.org, Frank.li@nxp.com, guodong@riscstar.com, linux-spi@vger.kernel.org, imx@lists.linux.dev, spacemit@lists.linux.dev, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Frank Li Subject: [PATCH v2 3/9] spi: fsl-qspi: add optional reset support Date: Thu, 23 Oct 2025 12:59:15 -0500 Message-ID: <20251023175922.528868-4-elder@riscstar.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251023175922.528868-1-elder@riscstar.com> References: <20251023175922.528868-1-elder@riscstar.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add support for one or more optional exclusive resets. These simply need to be deasserted at probe time, and can remain that way for the life of the device. Reviewed-by: Frank Li Signed-off-by: Alex Elder --- v2: - Added Frank Li's Reviewed-by drivers/spi/spi-fsl-qspi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/spi/spi-fsl-qspi.c b/drivers/spi/spi-fsl-qspi.c index c887abb028d77..1e27647dd2a09 100644 --- a/drivers/spi/spi-fsl-qspi.c +++ b/drivers/spi/spi-fsl-qspi.c @@ -36,6 +36,7 @@ #include #include #include +#include #include =20 #include @@ -267,6 +268,7 @@ struct fsl_qspi { const struct fsl_qspi_devtype_data *devtype_data; struct mutex lock; struct completion c; + struct reset_control *resets; struct clk *clk, *clk_en; struct pm_qos_request pm_qos_req; struct device *dev; @@ -857,6 +859,8 @@ static void fsl_qspi_cleanup(void *data) { struct fsl_qspi *q =3D data; =20 + reset_control_assert(q->resets); + fsl_qspi_clk_disable_unprep(q); =20 mutex_destroy(&q->lock); @@ -902,6 +906,10 @@ static int fsl_qspi_probe(struct platform_device *pdev) if (!q->ahb_addr) return -ENOMEM; =20 + q->resets =3D devm_reset_control_array_get_optional_exclusive(dev); + if (IS_ERR(q->resets)) + return PTR_ERR(q->resets); + /* find the clocks */ q->clk_en =3D devm_clk_get(dev, "qspi_en"); if (IS_ERR(q->clk_en)) @@ -923,6 +931,10 @@ static int fsl_qspi_probe(struct platform_device *pdev) if (ret) return ret; =20 + ret =3D reset_control_deassert(q->resets); + if (ret) + return ret; + /* find the irq */ ret =3D platform_get_irq(pdev, 0); if (ret < 0) --=20 2.43.0