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i3c: master: Replace hard code 2 with macro I3C_ADDR_SLOT_STATUS_BITS

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[ Upstream commit 16aed0a6520ba01b7d22c32e193fc1ec674f92d4 ]

Replace the hardcoded value 2, which indicates 2 bits for I3C address
status, with the predefined macro I3C_ADDR_SLOT_STATUS_BITS.

Improve maintainability and extensibility of the code.

Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20241021-i3c_dts_assign-v8-1-4098b8bde01e@nxp.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Stable-dep-of: 851bd21cdb55 ("i3c: master: Fix dynamic address leak when 'assigned-address' is present")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Frank Li 2024-10-21 11:45:06 -04:00 committed by Ksawlii
parent b14e10b87b
commit 59e8de2108
2 changed files with 5 additions and 3 deletions
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4
drivers/i3c/master.c
View file

@ -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_STATUS_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_STATUS_BITS;
unsigned long *ptr;
if (addr > I2C_MAX_ADDR)

4
include/linux/i3c/master.h
View file

@ -291,6 +291,8 @@ enum i3c_addr_slot_status {
I3C_ADDR_SLOT_STATUS_MASK = 3,
};
#define I3C_ADDR_SLOT_STATUS_BITS 2
/**
* struct i3c_bus - I3C bus object
* @cur_master: I3C master currently driving the bus. Since I3C is multi-master
@ -332,7 +334,7 @@ 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_STATUS_BITS) / BITS_PER_LONG];
enum i3c_bus_mode mode;
struct {
unsigned long i3c;