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Thu, 2 Jun 2022 17:54:26 +0000 (GMT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 09251AE063; Thu, 2 Jun 2022 17:54:26 +0000 (GMT) Received: from localhost (unknown [9.41.178.126]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Thu, 2 Jun 2022 17:54:25 +0000 (GMT) From: Scott Cheloha To: linux-watchdog@vger.kernel.org Subject: [PATCH v2 3/4] powerpc/pseries: register pseries-wdt device with platform bus Date: Thu, 2 Jun 2022 12:53:52 -0500 Message-Id: <20220602175353.68942-4-cheloha@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220602175353.68942-1-cheloha@linux.ibm.com> References: <20220602175353.68942-1-cheloha@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: t_2Utd-fSi2URAwB81AuFp11Qj-PUZ5R X-Proofpoint-ORIG-GUID: 6lNjq6fiwRbaHfcdv992gnTBQEFjG_85 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.517,FMLib:17.11.64.514 definitions=2022-06-02_05,2022-06-02_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 phishscore=0 spamscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 bulkscore=0 suspectscore=0 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2204290000 definitions=main-2206020073 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: nathanl@linux.ibm.com, wvoigt@us.ibm.com, aik@ozlabs.ru, Scott Cheloha , vaishnavi@linux.ibm.com, npiggin@gmail.com, tzungbi@kernel.org, brking@linux.ibm.com, linuxppc-dev@lists.ozlabs.org, linux@roeck-us.net Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" PAPR v2.12 defines a new hypercall, H_WATCHDOG. The hypercall permits guest control of one or more virtual watchdog timers. These timers do not conform to PowerPC device conventions. They are not affixed to any extant bus, nor do they have full representation in the device tree. As a workaround we represent them as platform devices. This patch registers a single platform device, "pseries-wdt", with the platform bus if the FW_FEATURE_WATCHDOG flag is set. A driver for this device, "pseries-wdt", will be introduced in a subsequent patch. Signed-off-by: Scott Cheloha Reviewed-by: Nathan Lynch --- arch/powerpc/platforms/pseries/setup.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index afb074269b42..233c64f59815 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -14,6 +14,7 @@ #include #include +#include #include #include #include @@ -169,6 +170,22 @@ static void __init fwnmi_init(void) #endif } +/* + * Affix a device for the first timer to the platform bus if + * we have firmware support for the H_WATCHDOG hypercall. + */ +static struct platform_device *pseries_wdt_pdev; + +static __init int pseries_wdt_init(void) +{ + if (!firmware_has_feature(FW_FEATURE_WATCHDOG)) + return 0; + pseries_wdt_pdev = platform_device_register_simple("pseries-wdt", + 0, NULL, 0); + return 0; +} +machine_subsys_initcall(pseries, pseries_wdt_init); + static void pseries_8259_cascade(struct irq_desc *desc) { struct irq_chip *chip = irq_desc_get_chip(desc);