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Subject[PATCH v2 2/5] i2c: mux: pca9541: namespace cleanup
Date
In preparation for PCA9641 support, convert the mybus and busoff macros
to functions, and in the process prefix them with pca9541_. Also prefix
remaining chip specific macros with PCA9541_.

Reviewed-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Peter Rosin <peda@axentia.se>
---
drivers/i2c/muxes/i2c-mux-pca9541.c | 26 +++++++++++++++++++-------
1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/muxes/i2c-mux-pca9541.c b/drivers/i2c/muxes/i2c-mux-pca9541.c
index 30cabf482985..28f46450f4b4 100644
--- a/drivers/i2c/muxes/i2c-mux-pca9541.c
+++ b/drivers/i2c/muxes/i2c-mux-pca9541.c
@@ -59,10 +59,8 @@
#define PCA9541_ISTAT_MYTEST BIT(6)
#define PCA9541_ISTAT_NMYTEST BIT(7)

-#define BUSON (PCA9541_CTL_BUSON | PCA9541_CTL_NBUSON)
-#define MYBUS (PCA9541_CTL_MYBUS | PCA9541_CTL_NMYBUS)
-#define mybus(x) (!((x) & MYBUS) || ((x) & MYBUS) == MYBUS)
-#define busoff(x) (!((x) & BUSON) || ((x) & BUSON) == BUSON)
+#define PCA9541_BUSON (PCA9541_CTL_BUSON | PCA9541_CTL_NBUSON)
+#define PCA9541_MYBUS (PCA9541_CTL_MYBUS | PCA9541_CTL_NMYBUS)

/* arbitration timeouts, in jiffies */
#define ARB_TIMEOUT (HZ / 8) /* 125 ms until forcing bus ownership */
@@ -93,6 +91,20 @@ static const struct of_device_id pca9541_of_match[] = {
MODULE_DEVICE_TABLE(of, pca9541_of_match);
#endif

+static bool pca9541_mybus(int ctl)
+{
+ if (!(ctl & PCA9541_MYBUS))
+ return true;
+ return (ctl & PCA9541_MYBUS) == PCA9541_MYBUS;
+}
+
+static bool pca9541_busoff(int ctl)
+{
+ if (!(ctl & PCA9541_BUSON))
+ return true;
+ return (ctl & PCA9541_BUSON) == PCA9541_BUSON;
+}
+
/*
* Write to chip register. Don't use i2c_transfer()/i2c_smbus_xfer()
* as they will try to lock the adapter a second time.
@@ -134,7 +146,7 @@ static void pca9541_release_bus(struct i2c_client *client)
int reg;

reg = pca9541_reg_read(client, PCA9541_CONTROL);
- if (reg >= 0 && !busoff(reg) && mybus(reg))
+ if (reg >= 0 && !pca9541_busoff(reg) && pca9541_mybus(reg))
pca9541_reg_write(client, PCA9541_CONTROL,
(reg & PCA9541_CTL_NBUSON) >> 1);
}
@@ -186,7 +198,7 @@ static int pca9541_arbitrate(struct i2c_client *client)
if (reg < 0)
return reg;

- if (busoff(reg)) {
+ if (pca9541_busoff(reg)) {
int istat;
/*
* Bus is off. Request ownership or turn it on unless
@@ -211,7 +223,7 @@ static int pca9541_arbitrate(struct i2c_client *client)
*/
data->select_timeout = SELECT_DELAY_LONG * 2;
}
- } else if (mybus(reg)) {
+ } else if (pca9541_mybus(reg)) {
/*
* Bus is on, and we own it. We are done with acquisition.
* Reset NTESTON and BUSINIT, then return success.
--
2.11.0
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