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From: Frank Li <Frank.Li@nxp.com>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>,
	 Boris Brezillon <boris.brezillon@collabora.com>,
	 Parshuram Thombare <pthombar@cadence.com>,
	 Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	 Boris Brezillon <bbrezillon@kernel.org>,
	Arnd Bergmann <arnd@arndb.de>,
	 Miquel Raynal <miquel.raynal@bootlin.com>,
	 Conor Culhane <conor.culhane@silvaco.com>
Cc: linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org,
	 Frank Li <Frank.Li@nxp.com>
Subject: [PATCH 2/7] i3c: master: Replace hard code 2 with macro I3C_ADDR_SLOT_BITS
Date: Wed, 24 Jul 2024 11:45:47 -0400	[thread overview]
Message-ID: <20240724-i3c_fix-v1-2-bfa500b023d6@nxp.com> (raw)
In-Reply-To: <20240724-i3c_fix-v1-0-bfa500b023d6@nxp.com>

Replace the hardcoded value 2, which indicates 2 bits for I3C address
status, with the predefined macro I3C_ADDR_SLOT_BITS.

Improve maintainability and extensibility of the code.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/i3c/master.c       | 4 ++--
 include/linux/i3c/master.h | 4 +++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 852b32178b722..85c737554c940 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -348,7 +348,7 @@ static enum i3c_addr_slot_status
 i3c_bus_get_addr_slot_status(struct i3c_bus *bus, u16 addr)
 {
 	unsigned long status;
-	int bitpos = addr * 2;
+	int bitpos = addr * I3C_ADDR_SLOT_BITS;
 
 	if (addr > I2C_MAX_ADDR)
 		return I3C_ADDR_SLOT_RSVD;
@@ -362,7 +362,7 @@ i3c_bus_get_addr_slot_status(struct i3c_bus *bus, u16 addr)
 static void i3c_bus_set_addr_slot_status(struct i3c_bus *bus, u16 addr,
 					 enum i3c_addr_slot_status status)
 {
-	int bitpos = addr * 2;
+	int bitpos = addr * I3C_ADDR_SLOT_BITS;
 	unsigned long *ptr;
 
 	if (addr > I2C_MAX_ADDR)
diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h
index 074f632868d98..4601b6957f799 100644
--- a/include/linux/i3c/master.h
+++ b/include/linux/i3c/master.h
@@ -299,6 +299,8 @@ enum i3c_addr_slot_status {
 	I3C_ADDR_SLOT_STATUS_MASK = 3,
 };
 
+#define I3C_ADDR_SLOT_BITS 2
+
 /**
  * struct i3c_bus - I3C bus object
  * @cur_master: I3C master currently driving the bus. Since I3C is multi-master
@@ -340,7 +342,7 @@ enum i3c_addr_slot_status {
 struct i3c_bus {
 	struct i3c_dev_desc *cur_master;
 	int id;
-	unsigned long addrslots[((I2C_MAX_ADDR + 1) * 2) / BITS_PER_LONG];
+	unsigned long addrslots[((I2C_MAX_ADDR + 1) * I3C_ADDR_SLOT_BITS) / BITS_PER_LONG];
 	enum i3c_bus_mode mode;
 	struct {
 		unsigned long i3c;

-- 
2.34.1


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  parent reply	other threads:[~2024-07-24 15:46 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-07-24 15:45 [PATCH 0/7] i3c: master: some fix and improvemnt for hotjoin Frank Li
2024-07-24 15:45 ` [PATCH 1/7] i3c: master: Remove i3c_dev_disable_ibi_locked(olddev) on device hotjoin Frank Li
2024-07-24 15:45 ` Frank Li [this message]
2024-07-24 15:45 ` [PATCH 3/7] i3c: master: Extend address status bit to 4 and add I3C_ADDR_SLOT_EXT_INIT Frank Li
2024-07-24 15:45 ` [PATCH 4/7] i3c: master: Fix dynamic address leak when 'assigned-address' is present Frank Li
2024-07-24 15:45 ` [PATCH 5/7] i3c: master: Fix miss free init_dyn_addr at i3c_master_put_i3c_addrs() Frank Li
2024-07-24 15:45 ` [PATCH 6/7] i3c: master: svc: use repeat start when IBI WIN happens Frank Li
2024-07-24 15:45 ` [PATCH 7/7] i3c: master: svc: manually emit NACK/ACK for hotjoin Frank Li

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