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Fri, 17 May 2024 02:50:18 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.11.0-alpha0-456-gcd147058c-fm-hotfix-20240509.001-g0aad06e4 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <1d1c92f3-1692-40a1-aeb9-ef3e342e9bf6@app.fastmail.com> In-Reply-To: <20240516095733.276807-1-b-kapoor@ti.com> References: <20240516095733.276807-1-b-kapoor@ti.com> Date: Fri, 17 May 2024 06:49:58 +0000 From: "Arnd Bergmann" To: "Bhavya Kapoor" , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: "Udit Kumar" , =?UTF-8?Q?N=C3=ADcolas_F=2E_R=2E_A=2E_Prado?= , "Marek Szyprowski" , "Biju Das" , "Neil Armstrong" , "Shawn Guo" , "Konrad Dybcio" , "Geert Uytterhoeven" , "Krzysztof Kozlowski" , "Bjorn Andersson" , "Will Deacon" , "Catalin Marinas" Subject: Re: [PATCH] arm64: defconfig: Modify number of usable 8250 uart ports Content-Type: text/plain On Thu, May 16, 2024, at 09:57, Bhavya Kapoor wrote: > Jacinto SoCs have a total of 12 serial uart ports. But only 8 out > of these 12 uarts can be used at a time. > > Thus, Modify maximum number of 8250 serial uart ports which can be > supported as well as modify how many 8250 serial uart ports which > we can use in the runtime to 12 for all the SoCs. > > Signed-off-by: Bhavya Kapoor I forget what we had already discussed here. To clarify from my side: it's ok to raise the limit if there are any known boards that connect more than 8 8250 style uarts to external devices or populated connectors. On the other hand, I don't see any dts file at the moment that has more than the maximum of 8 in k3-am642-tqma64xxl-mbax4xxl.dts. If you are adding another board that has more, it helps to clarify in the patch description that this is indeed a board requirement, and not just done because the chip has additional unused uarts. Arnd