linux-kernel - [PATCH 2/4] firmware: xilinx: Add version check for TRISTATE configuration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230717093347.3869167-3-sai.krishna.potthuri@amd.com>
Date:   Mon, 17 Jul 2023 15:03:45 +0530
From:   Sai Krishna Potthuri <sai.krishna.potthuri@....com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Michal Simek <michal.simek@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Tanmay Shah <tanmay.shah@....com>,
        Ben Levinsky <ben.levinsky@....com>,
        Marek Vasut <marex@...x.de>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Arnd Bergmann <arnd@...db.de>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <saikrishna12468@...il.com>,
        <git@....com>, Sai Krishna Potthuri <sai.krishna.potthuri@....com>
Subject: [PATCH 2/4] firmware: xilinx: Add version check for TRISTATE configuration

Support for configuring TRISTATE parameter is added in ZYNQMP PMUFW(Xilinx
ZynqMP Platform Management Firmware) Configuration Param Set version 2.0.
If the requested configuration is TRISTATE and platform is ZYNQMP then
check the version before requesting Xilinx firmware to set the
configuration.

Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@....com>
---
 drivers/firmware/xilinx/zynqmp.c     | 9 +++++++++
 include/linux/firmware/xlnx-zynqmp.h | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index f9498e7ea694..307717f24a98 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -1150,6 +1150,15 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_config);
 int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
 				 u32 value)
 {
+	int ret;
+
+	if (pm_family_code == ZYNQMP_FAMILY_CODE &&
+	    param == PM_PINCTRL_CONFIG_TRI_STATE) {
+		ret = zynqmp_pm_feature(PM_PINCTRL_CONFIG_PARAM_SET);
+		if (ret < PM_PINCTRL_PARAM_SET_VERSION)
+			return -EOPNOTSUPP;
+	}
+
 	return zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_SET, pin,
 				   param, value, 0, NULL);
 }
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index d7f94b42ad4c..6359eeea8dd7 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -34,6 +34,8 @@
 /* PM API versions */
 #define PM_API_VERSION_2	2
 
+#define PM_PINCTRL_PARAM_SET_VERSION	2
+
 #define ZYNQMP_FAMILY_CODE 0x23
 #define VERSAL_FAMILY_CODE 0x26
 
-- 
2.25.1