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bh=utnt45WNES8x5nuh03dm8k/Z+7rA8EuGdWHHb+kLIVU=; b=EEYlsr3N4AalYjVZyZ314QlxbFau2pWHvylF3s9YafC5P9rqRAzGCtWXod3ZIvNjgq E5rslb6EWnoNbWxyGKptdWZEhRO9uehNw+1L7Cn7d8ZxohD/KcRDBebgaq4HSvp274lp cEB+7X944JGH43AvUEcz5SzLyYf4ppkHoGfUfWqA/kX5CNPAMCmme/Im2E4faSQ3Wb+d BrYu1Lu4X7aPmAe4f44P9DO5s6n5XP4Aq7btZO2jrjlk1clMa+K2mtAheDobJMKM6JZS F2LhnVV81kQabEpAE/n4EsBeylC71oP6tT2Q5/zGomqt+0bhJ41VPGdCDU/AVEsXxrTd u2Og== X-Gm-Message-State: AAQBX9cMSo4ThWSMNT1XTTe0wz7/NngLSOR3ysB6wvgfvfon7vOCKGUE K+XYRiomNbPeow3uF8M1jE8= X-Received: by 2002:a17:907:844:b0:94f:61f5:9ef7 with SMTP id ww4-20020a170907084400b0094f61f59ef7mr3680011ejb.44.1681723618587; Mon, 17 Apr 2023 02:26:58 -0700 (PDT) Received: from A13PC04R.einet.ad.eivd.ch ([193.134.219.72]) by smtp.googlemail.com with ESMTPSA id p20-20020a170906615400b0094aa087578csm6398596ejl.171.2023.04.17.02.26.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Apr 2023 02:26:58 -0700 (PDT) From: Rick Wertenbroek To: alberto.dassatti@heig-vd.ch Cc: xxm@rock-chips.com, Rick Wertenbroek , Damien Le Moal , Shawn Lin , Bjorn Helgaas , Lorenzo Pieralisi , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Rob Herring , Krzysztof Kozlowski , Heiko Stuebner , Brian Norris , Caleb Connolly , Corentin Labbe , Johan Jonker , Arnaud Ferraris , Judy Hsiao , Hugh Cole-Baker , linux-pci@vger.kernel.org, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 01/11] PCI: rockchip: Remove writes to unused registers Date: Mon, 17 Apr 2023 11:26:19 +0200 Message-Id: <20230417092631.347976-2-rick.wertenbroek@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230417092631.347976-1-rick.wertenbroek@gmail.com> References: <20230417092631.347976-1-rick.wertenbroek@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Remove write accesses to registers that are marked "unused" (and therefore read-only) in the technical reference manual (TRM) (see RK3399 TRM 17.6.8.1) Signed-off-by: Rick Wertenbroek Tested-by: Damien Le Moal --- drivers/pci/controller/pcie-rockchip-ep.c | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index d1a200b93b2b..d5c477020417 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -61,10 +61,6 @@ static void rockchip_pcie_clear_ep_ob_atu(struct rockchip_pcie *rockchip, ROCKCHIP_PCIE_AT_OB_REGION_DESC0(region)); rockchip_pcie_write(rockchip, 0, ROCKCHIP_PCIE_AT_OB_REGION_DESC1(region)); - rockchip_pcie_write(rockchip, 0, - ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR0(region)); - rockchip_pcie_write(rockchip, 0, - ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR1(region)); } static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn, @@ -114,12 +110,6 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn, PCIE_CORE_OB_REGION_ADDR0_LO_ADDR); addr1 = upper_32_bits(cpu_addr); } - - /* CPU bus address region */ - rockchip_pcie_write(rockchip, addr0, - ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR0(r)); - rockchip_pcie_write(rockchip, addr1, - ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR1(r)); } static int rockchip_pcie_ep_write_header(struct pci_epc *epc, u8 fn, u8 vfn, -- 2.25.1