linux-kernel - [PATCH v3 26/27] powerpc/powernv/pmem: Expose the firmware version in sysfs

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Date:   Fri, 21 Feb 2020 14:27:19 +1100
From:   "Alastair D'Silva" <alastair@....ibm.com>
To:     alastair@...ilva.org
Cc:     "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        "Oliver O'Halloran" <oohall@...il.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh@...nel.org>,
        Anton Blanchard <anton@...abs.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Mahesh Salgaonkar <mahesh@...ux.vnet.ibm.com>,
        Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>,
        Cédric Le Goater <clg@...d.org>,
        Anju T Sudhakar <anju@...ux.vnet.ibm.com>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kurz <groug@...d.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-nvdimm@...ts.01.org, linux-mm@...ck.org
Subject: [PATCH v3 26/27] powerpc/powernv/pmem: Expose the firmware version in sysfs

From: Alastair D'Silva <alastair@...ilva.org>

This information will be used by ndctl in userspace to help users identify
the device.

Signed-off-by: Alastair D'Silva <alastair@...ilva.org>
---
 arch/powerpc/platforms/powernv/pmem/ocxl_sysfs.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/pmem/ocxl_sysfs.c b/arch/powerpc/platforms/powernv/pmem/ocxl_sysfs.c
index 7829e4bc887d..84b23cc3e8b7 100644
--- a/arch/powerpc/platforms/powernv/pmem/ocxl_sysfs.c
+++ b/arch/powerpc/platforms/powernv/pmem/ocxl_sysfs.c
@@ -16,8 +16,17 @@ static ssize_t serial_show(struct device *device, struct device_attribute *attr,
 	return scnprintf(buf, PAGE_SIZE, "%llu\n", fn_config->serial);
 }
 
+static ssize_t fw_version_show(struct device *device,
+			       struct device_attribute *attr, char *buf)
+{
+	struct ocxlpmem *ocxlpmem = container_of(device, struct ocxlpmem, dev);
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n", ocxlpmem->fw_version);
+}
+
 static struct device_attribute attrs[] = {
 	__ATTR_RO(serial),
+	__ATTR_RO(fw_version),
 };
 
 int ocxlpmem_sysfs_add(struct ocxlpmem *ocxlpmem)
-- 
2.24.1