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Mon, 20 Jul 2026 01:04:16 -0700 (PDT) X-Received: by 2002:a05:622a:7:b0:51c:d52:6049 with SMTP id d75a77b69052e-5213ced0406mr130529061cf.28.1784534655488; Mon, 20 Jul 2026 01:04:15 -0700 (PDT) Received: from QCOM-eG0v1AUPpu.na.qualcomm.com ([2a01:e0a:830:450:751c:d61c:c91:60dd]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-69e7000c3e2sm4256542a12.30.2026.07.20.01.04.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jul 2026 01:04:14 -0700 (PDT) From: Loic Poulain Date: Mon, 20 Jul 2026 10:04:06 +0200 Subject: [PATCH v5 04/11] power: sequencing: pcie-m2: Report power controllability Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260720-monza-wireless-v5-4-69ec6743543c@oss.qualcomm.com> References: <20260720-monza-wireless-v5-0-69ec6743543c@oss.qualcomm.com> In-Reply-To: <20260720-monza-wireless-v5-0-69ec6743543c@oss.qualcomm.com> To: Manivannan Sadhasivam , Bartosz Golaszewski , Marcel Holtmann , Luiz Augusto von Dentz , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-pci@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-bluetooth@vger.kernel.org, devicetree@vger.kernel.org, Manivannan Sadhasivam , Loic Poulain X-Mailer: b4 0.14.2 X-Authority-Analysis: v=2.4 cv=HeYkiCE8 c=1 sm=1 tr=0 ts=6a5dd680 cx=c_pps a=WeENfcodrlLV9YRTxbY/uA==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=EUspDBNiAAAA:8 a=Wval_j7vKiRkorSqWqkA:9 a=QEXdDO2ut3YA:10 a=kacYvNCVWA4VmyqE58fU:22 X-Proofpoint-GUID: _hu36WPkPt1AQ91Lh3FrMxaInGfDGhDu X-Proofpoint-ORIG-GUID: _hu36WPkPt1AQ91Lh3FrMxaInGfDGhDu X-Proofpoint-Spam-Info: AW1haW4tMjYwNzIwMDA4NyBTYWx0ZWRfX6ybhyfrWev3I r5V11cvG1Tu9XUBJbfagWViSCaAI/R8zIYholysz0V7B8rLpK4N8hpm2lUpCvpL9vMRF70gELR+ 3FzXwUtZwefBcvsOPOzNkIX+kSsnNCg= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzIwMDA4NyBTYWx0ZWRfX6hZM7ScWc6AK zpuRb5fYU1jS62DhBaoWL4kfyP2E7NjK+LMG4WUjkSUp6eplOUQ/aKnC8YrhNd/CNWFrr/FuUXB 30OtLIRjb6AOqaDv9BiycXMpda7uxnbAlJuvsVZxByuIU90PPjC5Wos4pVOKZzAjbWDu52QBr5l b7+p1NRlD1cyLbH0nWLeZJ8/4F0QH7i6mUg52o978pCza6C0dbqR0Bky9uYoy3rKFi3jp9WcX34 9qKlu7TQos8zefdcFVrjMyA53ubuKIoS4hrTCCUxGj6mczYZKklPUdpAYBbnhBvBRbl5TU8qhBg S54wvxwZVxPA7ebNBAMYbuC4oSaHER1mbSG3z012VQaCU4445NYZZOJz+g76L7ajC/aysnJtDjB guu3e78uelYtiC7RrZhEf39RttTPDH99rzYJRq4XFLkBBCwx8q2BFjAnEitsDTREWcYgdkhl6jR MfRuSP3bI9J+RZsPQ4Q== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-20_01,2026-07-17_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 impostorscore=0 malwarescore=0 suspectscore=0 phishscore=0 clxscore=1015 adultscore=0 bulkscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607200087 The M.2 Key E connector gates/resets its functions through the W_DISABLE1# (PCIe/WiFi) and W_DISABLE2# (Bluetooth) signals. When a signal is not routed to a host GPIO, the corresponding enable/disable callbacks are no-ops, so the consumer cannot gate or reset that function on its own. Implement the .is_controllable() callback on the "uart" and "pcie" targets so that consumers can query this per instance (based on the runtime presence of the W_DISABLE2#/W_DISABLE1# GPIOs) via pwrseq_is_controllable(). Signed-off-by: Loic Poulain --- drivers/power/sequencing/pwrseq-pcie-m2.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/power/sequencing/pwrseq-pcie-m2.c b/drivers/power/sequencing/pwrseq-pcie-m2.c index e3ba9169144dabbf0c553c0a4302c3b511fcaaa1..8e4cb778e31f66aa171ad9831d4213e17d2e6145 100644 --- a/drivers/power/sequencing/pwrseq-pcie-m2.c +++ b/drivers/power/sequencing/pwrseq-pcie-m2.c @@ -84,6 +84,18 @@ static int pwrseq_pci_m2_e_uart_disable(struct pwrseq_device *pwrseq) return gpiod_set_value_cansleep(ctx->w_disable2_gpio, 1); } +static bool pwrseq_pci_m2_e_uart_is_controllable(struct pwrseq_device *pwrseq) +{ + struct pwrseq_pcie_m2_ctx *ctx = pwrseq_device_get_drvdata(pwrseq); + + /* + * The UART enable is driven through the W_DISABLE2# line. When it is not + * wired up on this connector the enable/disable callbacks are no-ops, so + * the host cannot gate the Bluetooth function on its own. + */ + return !!ctx->w_disable2_gpio; +} + static const struct pwrseq_unit_data pwrseq_pcie_m2_e_uart_unit_data = { .name = "uart-enable", .deps = pwrseq_pcie_m2_unit_deps, @@ -105,6 +117,18 @@ static int pwrseq_pci_m2_e_pcie_disable(struct pwrseq_device *pwrseq) return gpiod_set_value_cansleep(ctx->w_disable1_gpio, 1); } +static bool pwrseq_pci_m2_e_pcie_is_controllable(struct pwrseq_device *pwrseq) +{ + struct pwrseq_pcie_m2_ctx *ctx = pwrseq_device_get_drvdata(pwrseq); + + /* + * The PCIe/WiFi enable is driven through the W_DISABLE1# line. When it + * is not wired up on this connector the enable/disable callbacks are + * no-ops, so the host cannot gate the PCIe/WiFi function on its own. + */ + return !!ctx->w_disable1_gpio; +} + static const struct pwrseq_unit_data pwrseq_pcie_m2_e_pcie_unit_data = { .name = "pcie-enable", .deps = pwrseq_pcie_m2_unit_deps, @@ -133,12 +157,14 @@ static const struct pwrseq_target_data pwrseq_pcie_m2_e_uart_target_data = { .name = "uart", .unit = &pwrseq_pcie_m2_e_uart_unit_data, .post_enable = pwrseq_pcie_m2_e_pwup_delay, + .is_controllable = pwrseq_pci_m2_e_uart_is_controllable, }; static const struct pwrseq_target_data pwrseq_pcie_m2_e_pcie_target_data = { .name = "pcie", .unit = &pwrseq_pcie_m2_e_pcie_unit_data, .post_enable = pwrseq_pcie_m2_e_pwup_delay, + .is_controllable = pwrseq_pci_m2_e_pcie_is_controllable, }; static const struct pwrseq_target_data pwrseq_pcie_m2_m_pcie_target_data = { -- 2.34.1