From patchwork Tue Mar 26 02:45:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13603302 X-Patchwork-Delegate: kw@linux.com Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D62055A7B4; Tue, 26 Mar 2024 02:51:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711421472; cv=none; b=Rj6dWvdFII20e7wbTHG3JQeuwGCMIoF9UN+Mz0JyOYCbwSYgRF2TGy9uQzBnBVIuopD06uaxL0JJvpThQUXvvx1puCTnYQPwF6fjck59/s+PnXnCZGPZ7H1a/nFQA60WpDGGoNCDM7s7An+N8KafJzojAs7PTCh/EMp4j/xHXKs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711421472; c=relaxed/simple; bh=MpqMQ/t/Tm6LdEI6CueBw7TL54njv18tTW+sqHAgPUc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Sn5qR/QZIjGVbD9RKWbf+7RWrcOEVcBud/KeGEFgifDm57AIULeRRSt1WvuSBHHgnsR5CLYTXFk2QjuzGVTLwa/4vrbBGBn6Pp2oPUosQp765h2mqFJlsQZkUi3xS6gwCy+ihmSTRhBkARu+GvqyN5nLziImIG95j1v/UnDHUcM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com; spf=pass smtp.mailfrom=renesas.com; arc=none smtp.client-ip=210.160.252.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com X-IronPort-AV: E=Sophos;i="6.07,154,1708354800"; d="scan'208";a="199248035" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 26 Mar 2024 11:45:58 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 1CF43415DFB8; Tue, 26 Mar 2024 11:45:58 +0900 (JST) From: Yoshihiro Shimoda To: lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jingoohan1@gmail.com, gustavo.pimentel@synopsys.com, mani@kernel.org Cc: marek.vasut+renesas@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH v2 4/6] PCI: dwc: rcar-gen4: Add a new function pointer for other SoC support Date: Tue, 26 Mar 2024 11:45:38 +0900 Message-Id: <20240326024540.2336155-5-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240326024540.2336155-1-yoshihiro.shimoda.uh@renesas.com> References: <20240326024540.2336155-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This driver can reuse other R-Car Gen4 SoC support. However, some initializing settings differs between r8a779f0 and others. So, add a new function pointer start_link_enable() to support other R-Car Gen4 SoC in the future. No behavior changes. Signed-off-by: Yoshihiro Shimoda --- drivers/pci/controller/dwc/pcie-rcar-gen4.c | 57 +++++++++++++++++++-- 1 file changed, 52 insertions(+), 5 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c index 0be760ed420b..a37613dd9ff4 100644 --- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c @@ -53,9 +53,16 @@ struct rcar_gen4_pcie { void __iomem *base; struct platform_device *pdev; enum dw_pcie_device_mode mode; + + int (*start_link_enable)(struct rcar_gen4_pcie *rcar); }; #define to_rcar_gen4_pcie(_dw) container_of(_dw, struct rcar_gen4_pcie, dw) +struct rcar_gen4_pcie_platdata { + enum dw_pcie_device_mode mode; + int (*start_link_enable)(struct rcar_gen4_pcie *rcar); +}; + /* Common */ static void rcar_gen4_pcie_ltssm_enable(struct rcar_gen4_pcie *rcar, bool enable) @@ -123,9 +130,13 @@ static int rcar_gen4_pcie_speed_change(struct dw_pcie *dw) static int rcar_gen4_pcie_start_link(struct dw_pcie *dw) { struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); - int i, changes; + int i, changes, ret; - rcar_gen4_pcie_ltssm_enable(rcar, true); + if (rcar->start_link_enable) { + ret = rcar->start_link_enable(rcar); + if (ret) + return ret; + } /* * Require direct speed change with retrying here if the link_gen is @@ -437,7 +448,10 @@ static void rcar_gen4_remove_dw_pcie_ep(struct rcar_gen4_pcie *rcar) /* Common */ static int rcar_gen4_add_dw_pcie(struct rcar_gen4_pcie *rcar) { - rcar->mode = (uintptr_t)of_device_get_match_data(&rcar->pdev->dev); + const struct rcar_gen4_pcie_platdata *pd = of_device_get_match_data(&rcar->pdev->dev); + + rcar->mode = pd->mode; + rcar->start_link_enable = pd->start_link_enable; switch (rcar->mode) { case DW_PCIE_RC_TYPE: @@ -500,14 +514,47 @@ static void rcar_gen4_pcie_remove(struct platform_device *pdev) rcar_gen4_pcie_unprepare(rcar); } +static int r8a779f0_pcie_start_link_enable(struct rcar_gen4_pcie *rcar) +{ + rcar_gen4_pcie_ltssm_enable(rcar, true); + + return 0; +} + +static struct rcar_gen4_pcie_platdata platdata_r8a779f0_pcie = { + .mode = DW_PCIE_RC_TYPE, + .start_link_enable = r8a779f0_pcie_start_link_enable, +}; + +static struct rcar_gen4_pcie_platdata platdata_r8a779f0_pcie_ep = { + .mode = DW_PCIE_EP_TYPE, + .start_link_enable = r8a779f0_pcie_start_link_enable, +}; + +static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie = { + .mode = DW_PCIE_RC_TYPE, +}; + +static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie_ep = { + .mode = DW_PCIE_EP_TYPE, +}; + static const struct of_device_id rcar_gen4_pcie_of_match[] = { + { + .compatible = "renesas,r8a779f0-pcie", + .data = &platdata_r8a779f0_pcie, + }, + { + .compatible = "renesas,r8a779f0-pcie-ep", + .data = &platdata_r8a779f0_pcie_ep, + }, { .compatible = "renesas,rcar-gen4-pcie", - .data = (void *)DW_PCIE_RC_TYPE, + .data = &platdata_rcar_gen4_pcie, }, { .compatible = "renesas,rcar-gen4-pcie-ep", - .data = (void *)DW_PCIE_EP_TYPE, + .data = &platdata_rcar_gen4_pcie_ep, }, {}, };