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Wysocki" , Daniel Lezcano , Amit Kucheria , Zhang Rui , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland Cc: Hugh Dickins , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, Mark Brown X-Mailer: b4 0.13-dev-099c9 X-Developer-Signature: v=1; a=openpgp-sha256; l=3509; i=broonie@kernel.org; h=from:subject:message-id; bh=dC6xVfoZAu1dLbggSONL4fKCtfqFkZexMTtlfTvKgfQ=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBktqoWNHLFaGMbLnk71Po+ikg0HmEFb2Er2KcvO TdEj449f3GJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZLaqFgAKCRAk1otyXVSH 0LBjB/9h8x5fbbbKuVsnCClJlyBKWsag8KbTFfpYMqgbuOYaRUZZEvIbLBoNKoSImBBiumXjCkP haBO3wVDrdvIpH90ub6r0UBAN7Z8F6ncmgNkWN7TlZwqymZdzXpucPHXbubWMT7BiiIirajZHvs D6A1s9yzq1Ac2htEyg4MraFxIM0Ew5LHtzTT/as0yE1VFUGzuuwl84dItvJu4N8XMAwIzlYfkIU Yrw0HUMNKWviJgjPcTjNvktREwhEjTNu5P/3XsEs6nklQCNk5JxbA7XnP6lbXoeHF6tH+e2Wx4k ofnYisR3/Q80C3IFmHKy6u09jteOqH0mYOw/KTG/6gHbxoDc X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230718_160551_009801_52244705 X-CRM114-Status: GOOD ( 25.29 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Currently the sun8i thermal driver will fail to probe if any of the thermal zones it is registering fails to register with the thermal core. Since we currently do not define any trip points for the GPU thermal zones on at least A64 or H5 this means that we have no thermal support on these platforms: [ 1.698703] thermal_sys: Failed to find 'trips' node [ 1.698707] thermal_sys: Failed to find trip points for thermal-sensor id=1 even though the main CPU thermal zone on both SoCs is fully configured. This does not seem ideal, while we may not be able to use all the zones it seems better to have those zones which are usable be operational. Instead just carry on registering zones if we get any non-deferral error, allowing use of those zones which are usable. This means that we also need to update the interrupt handler to not attempt to notify the core for events on zones which we have not registered, I didn't see an ability to mask individual interrupts and I would expect that interrupts would still be indicated in the ISR even if they were masked. Signed-off-by: Mark Brown Acked-by: Jernej Skrabec --- I noticed this while trying to debug an issue with memory corruption on boot which since the merge window has prevented Pine64 Plus (an A64) from booting at all: https://storage.kernelci.org/mainline/master/v6.5-rc2/arm64/defconfig/gcc-10/lab-baylibre/baseline-sun50i-a64-pine64-plus.txt (which I bisected to a random memory management change that clearly wasn't at fault) and has been causing less consistent but still very severe boot issues on Libretech Tritium (a H3). The corruption appears to happen when unbinding a the one thermal zone that does register, I've not figured out exactly where. The memory corruption issue obviously needs to be dealt with properly (I'm still digging into it) but this does allow both platforms to boot reliably and seems like a sensible thing to do independently, ideally we could get this in as a fix. --- drivers/thermal/sun8i_thermal.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) --- base-commit: fdf0eaf11452d72945af31804e2a1048ee1b574c change-id: 20230718-thermal-sun8i-registration-df3a136ccafa Best regards, diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c index 195f3c5d0b38..b69134538867 100644 --- a/drivers/thermal/sun8i_thermal.c +++ b/drivers/thermal/sun8i_thermal.c @@ -190,6 +190,9 @@ static irqreturn_t sun8i_irq_thread(int irq, void *data) int i; for_each_set_bit(i, &irq_bitmap, tmdev->chip->sensor_num) { + /* We allow some zones to not register. */ + if (IS_ERR(tmdev->sensor[i].tzd)) + continue; thermal_zone_device_update(tmdev->sensor[i].tzd, THERMAL_EVENT_UNSPECIFIED); } @@ -465,8 +468,17 @@ static int sun8i_ths_register(struct ths_device *tmdev) i, &tmdev->sensor[i], &ths_ops); - if (IS_ERR(tmdev->sensor[i].tzd)) - return PTR_ERR(tmdev->sensor[i].tzd); + + /* + * If an individual zone fails to register for reasons + * other than probe deferral (eg, a bad DT) then carry + * on, other zones might register successfully. + */ + if (IS_ERR(tmdev->sensor[i].tzd)) { + if (PTR_ERR(tmdev->sensor[i].tzd) == -EPROBE_DEFER) + return PTR_ERR(tmdev->sensor[i].tzd); + continue; + } devm_thermal_add_hwmon_sysfs(tmdev->dev, tmdev->sensor[i].tzd); }