From patchwork Mon Apr 1 02:39:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13612411 X-Patchwork-Delegate: kw@linux.com Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 86BD4443D; Mon, 1 Apr 2024 02:40:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711939203; cv=none; b=BIzzfojw8b25N+bj+Ey1mB+KSnRHB47NbgL/x4VblS1EpGBBZ1IqhcbAy9L9Njw6+GRQZEPE6TlXKsSKn2HVc0TNUGOWfNyry52rNxYVk1ff+j6Qjp6zObZEYkgmavneZcGF9RPPKL1gXLTBlStKmkT1RarW4Q9yU0yXPk2BxIg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711939203; c=relaxed/simple; bh=JvBtad0J2pVqMkVoLq9W0c2q+s1EJrC8zTxmJmrQfvQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=f4ofaGh2+vMkSDniGie/3m8+T8D23gdQC6aiP3/Sud1fqGjMrkwBk2sdnnIIVY3BXoXcYlcJIU28K8d95/7ISEr0EDHJ008BmjuBOU9GtCHA1O8IMjkxWSCA63S0l8xQQ5oVqNTDFl5o0X6/SoiqqQEmgm49CqZnqXNiR14Irks= 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=210.160.252.172 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="6.07,171,1708354800"; d="scan'208";a="203857163" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 01 Apr 2024 11:39:51 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 06B1C410EB80; Mon, 1 Apr 2024 11:39:51 +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, 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 v3 5/7] PCI: dwc: rcar-gen4: Add .ltssm_enable() for other SoC support Date: Mon, 1 Apr 2024 11:39:40 +0900 Message-Id: <20240401023942.134704-6-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240401023942.134704-1-yoshihiro.shimoda.uh@renesas.com> References: <20240401023942.134704-1-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 SoCs support like r8a779g0 and r8a779h0. However, r8a779g0 and r8a779h0 require other initializing settings that differ than r8a779f0. So, add a new function pointer .ltssm_enable() for it. No behavior changes. After applied this patch, probing SoCs by rcar_gen4_pcie_of_match[] will be changed like below: - r8a779f0 as "renesas,r8a779f0-pcie" and "renesas,r8a779f0-pcie-ep" Signed-off-by: Yoshihiro Shimoda --- drivers/pci/controller/dwc/pcie-rcar-gen4.c | 41 ++++++++++++++++++--- 1 file changed, 36 insertions(+), 5 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c index da2821d6efce..e760bcd30c4e 100644 --- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c @@ -48,7 +48,9 @@ #define RCAR_GEN4_PCIE_EP_FUNC_DBI_OFFSET 0x1000 #define RCAR_GEN4_PCIE_EP_FUNC_DBI2_OFFSET 0x800 +struct rcar_gen4_pcie; struct rcar_gen4_pcie_platdata { + int (*ltssm_enable)(struct rcar_gen4_pcie *rcar); enum dw_pcie_device_mode mode; }; @@ -61,8 +63,8 @@ struct rcar_gen4_pcie { #define to_rcar_gen4_pcie(_dw) container_of(_dw, struct rcar_gen4_pcie, dw) /* Common */ -static void rcar_gen4_pcie_ltssm_enable(struct rcar_gen4_pcie *rcar, - bool enable) +static void rcar_gen4_pcie_ltssm_control(struct rcar_gen4_pcie *rcar, + bool enable) { u32 val; @@ -127,9 +129,13 @@ 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->platdata->ltssm_enable) { + ret = rcar->platdata->ltssm_enable(rcar); + if (ret) + return ret; + } /* * Require direct speed change with retrying here if the link_gen is @@ -157,7 +163,7 @@ static void rcar_gen4_pcie_stop_link(struct dw_pcie *dw) { struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); - rcar_gen4_pcie_ltssm_enable(rcar, false); + rcar_gen4_pcie_ltssm_control(rcar, false); } static int rcar_gen4_pcie_common_init(struct rcar_gen4_pcie *rcar) @@ -504,6 +510,23 @@ static void rcar_gen4_pcie_remove(struct platform_device *pdev) rcar_gen4_pcie_unprepare(rcar); } +static int r8a779f0_pcie_ltssm_enable(struct rcar_gen4_pcie *rcar) +{ + rcar_gen4_pcie_ltssm_control(rcar, true); + + return 0; +} + +static struct rcar_gen4_pcie_platdata platdata_r8a779f0_pcie = { + .ltssm_enable = r8a779f0_pcie_ltssm_enable, + .mode = DW_PCIE_RC_TYPE, +}; + +static struct rcar_gen4_pcie_platdata platdata_r8a779f0_pcie_ep = { + .ltssm_enable = r8a779f0_pcie_ltssm_enable, + .mode = DW_PCIE_EP_TYPE, +}; + static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie = { .mode = DW_PCIE_RC_TYPE, }; @@ -513,6 +536,14 @@ static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie_ep = { }; static const struct of_device_id rcar_gen4_pcie_of_match[] = { + { + .compatible = "renesas,r8a779f0-pcie", + .data = &platdata_r8a779f0_pcie, + }, + { + .compatible = "renesas,r8a779f04-pcie-ep", + .data = &platdata_r8a779f0_pcie_ep, + }, { .compatible = "renesas,rcar-gen4-pcie", .data = &platdata_rcar_gen4_pcie,