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Thu, 16 Jul 2026 09:18:31 -0700 (PDT) X-Received: by 2002:a05:622a:248:b0:51c:257c:8166 with SMTP id d75a77b69052e-520bcdf04fdmr2655801cf.33.1784218710638; Thu, 16 Jul 2026 09:18:30 -0700 (PDT) Received: from QCOM-eG0v1AUPpu.na.qualcomm.com ([2a01:e0a:830:450:751c:d61c:c91:60dd]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c168744bdddsm257262866b.48.2026.07.16.09.18.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Jul 2026 09:18:29 -0700 (PDT) From: Loic Poulain Date: Thu, 16 Jul 2026 18:18:21 +0200 Subject: [PATCH v4 04/11] power: sequencing: pcie-m2: Report power controllability Precedence: bulk X-Mailing-List: linux-pci@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: <20260716-monza-wireless-v4-4-9b02e6f549d7@oss.qualcomm.com> References: <20260716-monza-wireless-v4-0-9b02e6f549d7@oss.qualcomm.com> In-Reply-To: <20260716-monza-wireless-v4-0-9b02e6f549d7@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-Proofpoint-ORIG-GUID: d8KlafrqzI9Q9-ZNOEJFge0kwLcYDD4L X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE2MDE2NyBTYWx0ZWRfX+Y5kYN8C3NRN 00/997D/uNxTMtMuCpgy3yrrJXgUdSoJMjm6paKZVEQu2E4CbHPizZetIyz/x01z6S9oispymy+ rWA6XaS/k0H9j6ofJ5ElbZjnM/YqyfT+6TflRAsn4Zm+1IOd4oeubBKApu1F9VqodeX9WzDL9Hu DZdhCLGo/7DwdKbh+xKg+4YZuzr95irajw8ZsNgXHKJvnMEO3idWkO3FWgCaknR1r1T7aAkhLHP +k/itEd5w8GsELHb7hvrLB4Wys2AZeX1+WC3K/+qt5y+EFrgMWMY2CSV280ybkXTEpnvVVyhEPD 1txOKEZRh3Ssmg4iWOJkOFGz9JoZcck+uZTjxWN5SrwzA1p9w+AUc6dGcMUdOP3PZN7a34H4D3w 82MNWqOH4LRNBRWqzdMoVJrs4fQG4PDnGH892Qe/ZRnXZamnEqRZdXVm2V9s2JfP0ld5QcYK5k+ x1LSu//yD857urjoFGg== X-Proofpoint-GUID: d8KlafrqzI9Q9-ZNOEJFge0kwLcYDD4L X-Authority-Analysis: v=2.4 cv=BPODalQG c=1 sm=1 tr=0 ts=6a590458 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=_glEPmIy2e8OvE2BGh3C:22 a=EUspDBNiAAAA:8 a=Wval_j7vKiRkorSqWqkA:9 a=QEXdDO2ut3YA:10 a=kacYvNCVWA4VmyqE58fU:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE2MDE2NyBTYWx0ZWRfX0YCebBiDfrfa Hpkxc/fJH+g3VJB2g638WEkqKMnXKJcFy02o6Iumg2v3J2ofWtMu9rQ6ipcOiqRML8WlTg47fEL LhUTmRAMmfS9Vuki+QJOAxbI+DV/3nU= 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=2026-07-16_05,2026-07-15_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 suspectscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 priorityscore=1501 phishscore=0 bulkscore=0 spamscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607160167 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