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[2603:9001:3d00:5353::14c1]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-50d7b2a5a67sm881914e0c.42.2024.10.17.09.09.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Oct 2024 09:09:35 -0700 (PDT) From: Jennifer Berringer To: Srinivas Kandagatla , Sebastian Reichel , Greg Kroah-Hartman , Maxime Ripard Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Jennifer Berringer Subject: [PATCH 3/3] power: reset: nvmem-reboot-mode: fix write for small cells Date: Thu, 17 Oct 2024 12:09:04 -0400 Message-ID: <20241017160904.2803663-3-jberring@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241017160904.2803663-1-jberring@redhat.com> References: <20241017160904.2803663-1-jberring@redhat.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Some devices, such as Qualcomm sa8775p, have an nvmem reboot mode cell that is smaller than 32 bits, which resulted in nvmem_reboot_mode_write() failing. Using nvmem_cell_write_variable_u32() fixes this by writing only the least-significant byte of the magic value when the size specified in device tree is only one byte. Signed-off-by: Jennifer Berringer --- drivers/power/reset/nvmem-reboot-mode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/power/reset/nvmem-reboot-mode.c b/drivers/power/reset/nvmem-reboot-mode.c index 41530b70cfc4..b52eb879d1c1 100644 --- a/drivers/power/reset/nvmem-reboot-mode.c +++ b/drivers/power/reset/nvmem-reboot-mode.c @@ -24,7 +24,7 @@ static int nvmem_reboot_mode_write(struct reboot_mode_driver *reboot, nvmem_rbm = container_of(reboot, struct nvmem_reboot_mode, reboot); - ret = nvmem_cell_write(nvmem_rbm->cell, &magic, sizeof(magic)); + ret = nvmem_cell_write_variable_u32(nvmem_rbm->cell, magic); if (ret < 0) dev_err(reboot->dev, "update reboot mode bits failed\n");