From: Kishon Vijay Abraham I <kishon@ti.com>
To: Tom Joseph <tjoseph@cadence.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Rob Herring <robh+dt@kernel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Andrew Murray <amurray@thegoodpenguin.co.uk>
Cc: Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-pci@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH v3 02/14] linux/kernel.h: Add PTR_ALIGN_DOWN macro
Date: Fri, 17 Apr 2020 18:27:41 +0530 [thread overview]
Message-ID: <20200417125753.13021-3-kishon@ti.com> (raw)
In-Reply-To: <20200417125753.13021-1-kishon@ti.com>
Add a macro for aligning down a pointer. This is useful to get an
aligned register address when a device allows only word access and
doesn't allow half word or byte access.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
include/linux/kernel.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 9b7a8d74a9d6..c3b361b5be54 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -34,6 +34,7 @@
#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
#define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask))
#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
+#define PTR_ALIGN_DOWN(p, a) ((typeof(p))ALIGN_DOWN((unsigned long)(p), (a)))
#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
/* generic data direction definitions */
--
2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Kishon Vijay Abraham I <kishon@ti.com>
To: Tom Joseph <tjoseph@cadence.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Rob Herring <robh+dt@kernel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Andrew Murray <amurray@thegoodpenguin.co.uk>
Cc: devicetree@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 02/14] linux/kernel.h: Add PTR_ALIGN_DOWN macro
Date: Fri, 17 Apr 2020 18:27:41 +0530 [thread overview]
Message-ID: <20200417125753.13021-3-kishon@ti.com> (raw)
In-Reply-To: <20200417125753.13021-1-kishon@ti.com>
Add a macro for aligning down a pointer. This is useful to get an
aligned register address when a device allows only word access and
doesn't allow half word or byte access.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
include/linux/kernel.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 9b7a8d74a9d6..c3b361b5be54 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -34,6 +34,7 @@
#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
#define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask))
#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
+#define PTR_ALIGN_DOWN(p, a) ((typeof(p))ALIGN_DOWN((unsigned long)(p), (a)))
#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
/* generic data direction definitions */
--
2.17.1
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next prev parent reply other threads:[~2020-04-17 12:58 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-17 12:57 [PATCH v3 00/14] Add PCIe support to TI's J721E SoC Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 01/14] PCI: cadence: Fix cdns_pcie_{host|ep}_setup() error path Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I [this message]
2020-04-17 12:57 ` [PATCH v3 02/14] linux/kernel.h: Add PTR_ALIGN_DOWN macro Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 03/14] PCI: cadence: Add support to use custom read and write accessors Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 04/14] PCI: cadence: Add support to start link and verify link status Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 05/14] PCI: cadence: Add read/write accessors to perform only 32-bit accesses Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 06/14] PCI: cadence: Allow pci_host_bridge to have custom pci_ops Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 07/14] PCI: cadence: Add new *ops* for CPU addr fixup Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 08/14] PCI: cadence: Fix updating Vendor ID and Subsystem Vendor ID register Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 09/14] PCI: cadence: Add MSI-X support to Endpoint driver Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-30 1:55 ` Rob Herring
2020-04-30 1:55 ` Rob Herring
2020-05-06 3:58 ` Kishon Vijay Abraham I
2020-05-06 3:58 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 10/14] dt-bindings: PCI: Add host mode dt-bindings for TI's J721E SoC Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-30 2:11 ` Rob Herring
2020-04-30 2:11 ` Rob Herring
2020-04-17 12:57 ` [PATCH v3 11/14] dt-bindings: PCI: Add EP " Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-30 2:13 ` Rob Herring
2020-04-30 2:13 ` Rob Herring
2020-04-17 12:57 ` [PATCH v3 12/14] PCI: j721e: Add TI J721E PCIe driver Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-30 2:11 ` Rob Herring
2020-04-30 2:11 ` Rob Herring
2020-05-06 4:18 ` Kishon Vijay Abraham I
2020-05-06 4:18 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 13/14] misc: pci_endpoint_test: Add J721E in pci_device_id table Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 12:57 ` [PATCH v3 14/14] MAINTAINERS: Add Kishon Vijay Abraham I for TI J721E SoC PCIe Kishon Vijay Abraham I
2020-04-17 12:57 ` Kishon Vijay Abraham I
2020-04-17 15:19 ` Joe Perches
2020-04-17 15:19 ` Joe Perches
2020-05-06 3:54 ` Kishon Vijay Abraham I
2020-05-06 3:54 ` Kishon Vijay Abraham I
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