[PATCH 3/5] net: dsa: microchip: Replace ksz9477_wait_alu_ready polling with regmap

[Marek Vasut]

Regmap provides polling function to poll for bits in a register. This
function is another reimplementation of polling for bit being clear in
a register. Replace this with regmap polling function. Moreover, inline
the function parameters, as the function is never called with any other
parameter values than this one.

Signed-off-by: Marek Vasut <ma...@denx.de>
Cc: Andrew Lunn <and...@lunn.ch>
Cc: Florian Fainelli <f.faine...@gmail.com>
Cc: Tristram Ha <tristram...@microchip.com>
Cc: Woojung Huh <woojung....@microchip.com>
---
 drivers/net/dsa/microchip/ksz9477.c | 34 ++++++++++-------------------
 1 file changed, 12 insertions(+), 22 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz9477.c 
b/drivers/net/dsa/microchip/ksz9477.c
index 0aab00bf23b9..e5b2f3e45db6 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -176,22 +176,12 @@ static void ksz9477_write_table(struct ksz_device *dev, 
u32 *table)
        ksz_write32(dev, REG_SW_ALU_VAL_D, table[3]);
 }
 
-static int ksz9477_wait_alu_ready(struct ksz_device *dev, u32 waiton,
-                                 int timeout)
+static int ksz9477_wait_alu_ready(struct ksz_device *dev)
 {
-       u32 data;
-
-       do {
-               ksz_read32(dev, REG_SW_ALU_CTRL__4, &data);
-               if (!(data & waiton))
-                       break;
-               usleep_range(1, 10);
-       } while (timeout-- > 0);
-
-       if (timeout <= 0)
-               return -ETIMEDOUT;
+       unsigned int val;
 
-       return 0;
+       return regmap_read_poll_timeout(dev->regmap[2], REG_SW_ALU_CTRL__4,
+                                       val, !(val & ALU_START), 10, 1000);
 }
 
 static int ksz9477_wait_alu_sta_ready(struct ksz_device *dev, u32 waiton,
@@ -633,8 +623,8 @@ static int ksz9477_port_fdb_add(struct dsa_switch *ds, int 
port,
        ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_READ | ALU_START);
 
        /* wait to be finished */
-       ret = ksz9477_wait_alu_ready(dev, ALU_START, 1000);
-       if (ret < 0) {
+       ret = ksz9477_wait_alu_ready(dev);
+       if (ret) {
                dev_dbg(dev->dev, "Failed to read ALU\n");
                goto exit;
        }
@@ -657,8 +647,8 @@ static int ksz9477_port_fdb_add(struct dsa_switch *ds, int 
port,
        ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_WRITE | ALU_START);
 
        /* wait to be finished */
-       ret = ksz9477_wait_alu_ready(dev, ALU_START, 1000);
-       if (ret < 0)
+       ret = ksz9477_wait_alu_ready(dev);
+       if (ret)
                dev_dbg(dev->dev, "Failed to write ALU\n");
 
 exit:
@@ -690,8 +680,8 @@ static int ksz9477_port_fdb_del(struct dsa_switch *ds, int 
port,
        ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_READ | ALU_START);
 
        /* wait to be finished */
-       ret = ksz9477_wait_alu_ready(dev, ALU_START, 1000);
-       if (ret < 0) {
+       ret = ksz9477_wait_alu_ready(dev);
+       if (ret) {
                dev_dbg(dev->dev, "Failed to read ALU\n");
                goto exit;
        }
@@ -724,8 +714,8 @@ static int ksz9477_port_fdb_del(struct dsa_switch *ds, int 
port,
        ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_WRITE | ALU_START);
 
        /* wait to be finished */
-       ret = ksz9477_wait_alu_ready(dev, ALU_START, 1000);
-       if (ret < 0)
+       ret = ksz9477_wait_alu_ready(dev);
+       if (ret)
                dev_dbg(dev->dev, "Failed to write ALU\n");
 
 exit:
-- 
2.20.1