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[86.139.30.37]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-46e1ce10bacsm20913985e9.0.2025.09.23.08.14.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Sep 2025 08:14:38 -0700 (PDT) From: Biju X-Google-Original-From: Biju To: Krzysztof Kozlowski Cc: Biju Das , linux-kernel@vger.kernel.org, Geert Uytterhoeven , Prabhakar Mahadev Lad , Biju Das , linux-renesas-soc@vger.kernel.org Subject: [PATCH v2] memory: renesas-rpc-if: Add suspend/resume support Date: Tue, 23 Sep 2025 16:14:33 +0100 Message-ID: <20250923151437.287721-1-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 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" From: Biju Das On RZ/G3E using PSCI, s2ram powers down the SoC. Add suspend/resume callbacks to control spi/spix2 clocks. Signed-off-by: Biju Das --- v1->v2: * Updated error messages in rpcif_resume(). --- drivers/memory/renesas-rpc-if.c | 57 ++++++++++++++++++++++++++++----- 1 file changed, 49 insertions(+), 8 deletions(-) diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-i= f.c index 4a417b693080..2bcb05559ccb 100644 --- a/drivers/memory/renesas-rpc-if.c +++ b/drivers/memory/renesas-rpc-if.c @@ -67,6 +67,8 @@ struct rpcif_priv { void __iomem *dirmap; struct regmap *regmap; struct reset_control *rstc; + struct clk *spi_clk; + struct clk *spix2_clk; struct platform_device *vdev; size_t size; const struct rpcif_info *info; @@ -1025,16 +1027,14 @@ static int rpcif_probe(struct platform_device *pdev) * disable it in remove(). */ if (rpc->info->type =3D=3D XSPI_RZ_G3E) { - struct clk *spi_clk; - - spi_clk =3D devm_clk_get_enabled(dev, "spix2"); - if (IS_ERR(spi_clk)) - return dev_err_probe(dev, PTR_ERR(spi_clk), + rpc->spix2_clk =3D devm_clk_get_enabled(dev, "spix2"); + if (IS_ERR(rpc->spix2_clk)) + return dev_err_probe(dev, PTR_ERR(rpc->spix2_clk), "cannot get enabled spix2 clk\n"); =20 - spi_clk =3D devm_clk_get_enabled(dev, "spi"); - if (IS_ERR(spi_clk)) - return dev_err_probe(dev, PTR_ERR(spi_clk), + rpc->spi_clk =3D devm_clk_get_enabled(dev, "spi"); + if (IS_ERR(rpc->spi_clk)) + return dev_err_probe(dev, PTR_ERR(rpc->spi_clk), "cannot get enabled spi clk\n"); } =20 @@ -1063,6 +1063,44 @@ static void rpcif_remove(struct platform_device *pde= v) platform_device_unregister(rpc->vdev); } =20 +static int rpcif_suspend(struct device *dev) +{ + struct rpcif_priv *rpc =3D dev_get_drvdata(dev); + + if (rpc->info->type =3D=3D XSPI_RZ_G3E) { + clk_disable_unprepare(rpc->spi_clk); + clk_disable_unprepare(rpc->spix2_clk); + } + + return 0; +} + +static int rpcif_resume(struct device *dev) +{ + struct rpcif_priv *rpc =3D dev_get_drvdata(dev); + + if (rpc->info->type =3D=3D XSPI_RZ_G3E) { + int ret; + + ret =3D clk_prepare_enable(rpc->spix2_clk); + if (ret) { + dev_err(dev, "failed to enable spix2 clock: %pe\n", + ERR_PTR(ret)); + return ret; + } + + ret =3D clk_prepare_enable(rpc->spi_clk); + if (ret) { + clk_disable_unprepare(rpc->spix2_clk); + dev_err(dev, "failed to enable spi clock: %pe\n", + ERR_PTR(ret)); + return ret; + } + } + + return 0; +} + static const struct rpcif_impl rpcif_impl =3D { .hw_init =3D rpcif_hw_init_impl, .prepare =3D rpcif_prepare_impl, @@ -1125,12 +1163,15 @@ static const struct of_device_id rpcif_of_match[] = =3D { }; MODULE_DEVICE_TABLE(of, rpcif_of_match); =20 +static DEFINE_SIMPLE_DEV_PM_OPS(rpcif_pm_ops, rpcif_suspend, rpcif_resume); + static struct platform_driver rpcif_driver =3D { .probe =3D rpcif_probe, .remove =3D rpcif_remove, .driver =3D { .name =3D "rpc-if", .of_match_table =3D rpcif_of_match, + .pm =3D pm_sleep_ptr(&rpcif_pm_ops), }, }; module_platform_driver(rpcif_driver); --=20 2.43.0