linux-kernel - [PATCH 2/6] PCI: Add PCI_EXP_SLTCAP_*

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Date:   Tue, 22 Feb 2022 17:31:54 +0100
From:   Pali Rohár <pali@...nel.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Marek Behún <kabel@...nel.org>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Gregory Clement <gregory.clement@...tlin.com>
Cc:     linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] PCI: Add PCI_EXP_SLTCAP_*_SHIFT macros

These macros allows to easily compose and extract Slot Power Limit and
Physical Slot Number values from Slot Capability Register.

Signed-off-by: Pali Rohár <pali@...nel.org>
Signed-off-by: Marek Behún <kabel@...nel.org>
---
 include/uapi/linux/pci_regs.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index 108f8523fa04..3fc9a4cac630 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -591,10 +591,13 @@
 #define  PCI_EXP_SLTCAP_HPS	0x00000020 /* Hot-Plug Surprise */
 #define  PCI_EXP_SLTCAP_HPC	0x00000040 /* Hot-Plug Capable */
 #define  PCI_EXP_SLTCAP_SPLV	0x00007f80 /* Slot Power Limit Value */
+#define  PCI_EXP_SLTCAP_SPLV_SHIFT	7  /* Slot Power Limit Value shift */
 #define  PCI_EXP_SLTCAP_SPLS	0x00018000 /* Slot Power Limit Scale */
+#define  PCI_EXP_SLTCAP_SPLS_SHIFT	15 /* Slot Power Limit Scale shift */
 #define  PCI_EXP_SLTCAP_EIP	0x00020000 /* Electromechanical Interlock Present */
 #define  PCI_EXP_SLTCAP_NCCS	0x00040000 /* No Command Completed Support */
 #define  PCI_EXP_SLTCAP_PSN	0xfff80000 /* Physical Slot Number */
+#define  PCI_EXP_SLTCAP_PSN_SHIFT	19 /* Physical Slot Number shift */
 #define PCI_EXP_SLTCTL		0x18	/* Slot Control */
 #define  PCI_EXP_SLTCTL_ABPE	0x0001	/* Attention Button Pressed Enable */
 #define  PCI_EXP_SLTCTL_PFDE	0x0002	/* Power Fault Detected Enable */
-- 
2.20.1