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[75.72.117.212]) by smtp.gmail.com with ESMTPSA id e9e14a558f8ab-430d070ba35sm33475995ab.10.2025.10.20.11.37.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Oct 2025 11:37:15 -0700 (PDT) Message-ID: Date: Mon, 20 Oct 2025 13:37:13 -0500 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 2/8] dt-bindings: spi: fsl-qspi: support SpacemiT K1 To: Mark Brown Cc: Conor Dooley , han.xu@nxp.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, dlan@gentoo.org, guodong@riscstar.com, devicetree@vger.kernel.org, linux-spi@vger.kernel.org, imx@lists.linux.dev, spacemit@lists.linux.dev, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org References: <20251020165152.666221-1-elder@riscstar.com> <20251020165152.666221-3-elder@riscstar.com> <20251020-blinked-primary-2b69cf37e9fe@spud> <710c36f2-3551-4738-a965-f1564416348c@sirena.org.uk> Content-Language: en-US From: Alex Elder In-Reply-To: <710c36f2-3551-4738-a965-f1564416348c@sirena.org.uk> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/20/25 1:26 PM, Mark Brown wrote: > On Mon, Oct 20, 2025 at 01:06:46PM -0500, Alex Elder wrote: >> On 10/20/25 12:39 PM, Conor Dooley wrote: > >>>> + - spacemit,k1-qspi > >>> Are the newly added resets mandatory for the spacemit platform? > >> This is interesting. I never even tried it without specifying them. > >> I just tried it, and at least on my system QSPI functioned without >> defining these resets. I will ask SpacemiT about this. If they are >> not needed I will omit the first patch (which added optional resets), >> and won't use them. > > It might be safer to describe them, otherwise things are vulnerable to > issues like the bootloader not leaving things in a predictable state. I mentioned exactly this in my message to SpacemiT just now. And yes, regardless of their answer, you're probably right. It is *possible* that these resets must be de-asserted, so it's safest to describe them. Conor please if you disagree with this, please say so. Otherwise I think I'll keep them in the next version Thanks. -Alex