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Fri, 08 Aug 2025 04:24:44 -0700 (PDT) Message-ID: Date: Fri, 8 Aug 2025 14:24:42 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 7/9] arm64: dts: renesas: rzg3s-smarc-som: Update dma-ranges for PCIe To: Bjorn Helgaas Cc: bhelgaas@google.com, lpieralisi@kernel.org, kwilczynski@kernel.org, mani@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, geert+renesas@glider.be, magnus.damm@gmail.com, catalin.marinas@arm.com, will@kernel.org, mturquette@baylibre.com, sboyd@kernel.org, p.zabel@pengutronix.de, lizhi.hou@amd.com, linux-pci@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, Claudiu Beznea , Wolfram Sang References: <20250708165540.GA2148533@bhelgaas> From: Claudiu Beznea Content-Language: en-US In-Reply-To: <20250708165540.GA2148533@bhelgaas> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi, Bjorn, On 08.07.2025 19:55, Bjorn Helgaas wrote: > On Fri, Jul 04, 2025 at 07:14:07PM +0300, Claudiu wrote: >> From: Claudiu Beznea >> >> The first 128MB of memory is reserved on this board for secure area. >> Update the PCIe dma-ranges property to reflect this. > > Can we include a sentence or two about what the "secure area" means? I'll update it. Basically, it is a RAM region that is used by firmware. Thank you for your review, Claudiu > I don't know how to connect this with anything in the driver. > >> Tested-by: Wolfram Sang >> Signed-off-by: Claudiu Beznea >> --- >> >> Changes in v3: >> - collected tags >> >> Changes in v2: >> - none, this patch is new >> >> arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi | 5 +++++ >> 1 file changed, 5 insertions(+) >> >> diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi >> index 39845faec894..1b03820a6f02 100644 >> --- a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi >> +++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi >> @@ -214,6 +214,11 @@ &sdhi2 { >> }; >> #endif >> >> +&pcie { >> + /* First 128MB is reserved for secure area. */ >> + dma-ranges = <0x42000000 0 0x48000000 0 0x48000000 0x0 0x38000000>; >> +}; >> + >> &pinctrl { >> #if SW_CONFIG3 == SW_ON >> eth0-phy-irq-hog { >> -- >> 2.43.0 >>