staging: wfx: use more power-efficient sleep for reset

Replace udelay() with usleep_range() as all uses are in a sleepable context.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://lore.kernel.org/r/59e1e4e5bd80c1879ef36eaa59916e47005dbb04.1581416843.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/wfx/bh.c b/drivers/staging/wfx/bh.c
index c6319ab..9fcab00 100644 (file)
--- a/drivers/staging/wfx/bh.c
+++ b/drivers/staging/wfx/bh.c
@@ -26,7 +26,7 @@ static void device_wakeup(struct wfx_dev *wdev)
        gpiod_set_value_cansleep(wdev->pdata.gpio_wakeup, 1);
        if (wfx_api_older_than(wdev, 1, 4)) {
                if (!completion_done(&wdev->hif.ctrl_ready))
-                       udelay(2000);
+                       usleep_range(2000, 2500);
        } else {
                // completion.h does not provide any function to wait
                // completion without consume it (a kind of

diff --git a/drivers/staging/wfx/bus_spi.c b/drivers/staging/wfx/bus_spi.c
index e3cd125..61e99b0 100644 (file)
--- a/drivers/staging/wfx/bus_spi.c
+++ b/drivers/staging/wfx/bus_spi.c
@@ -211,9 +211,9 @@ static int wfx_spi_probe(struct spi_device *func)
                if (spi_get_device_id(func)->driver_data & WFX_RESET_INVERTED)
                        gpiod_toggle_active_low(bus->gpio_reset);
                gpiod_set_value_cansleep(bus->gpio_reset, 1);
-               udelay(100);
+               usleep_range(100, 150);
                gpiod_set_value_cansleep(bus->gpio_reset, 0);
-               udelay(2000);
+               usleep_range(2000, 2500);
        }
 
        INIT_WORK(&bus->request_rx, wfx_spi_request_rx);

diff --git a/drivers/staging/wfx/hwio.c b/drivers/staging/wfx/hwio.c
index 47e04c5..d3a141d 100644 (file)
--- a/drivers/staging/wfx/hwio.c
+++ b/drivers/staging/wfx/hwio.c
@@ -142,7 +142,7 @@ static int indirect_read(struct wfx_dev *wdev, int reg, u32 addr, void *buf,
                        goto err;
                if (!(cfg & prefetch))
                        break;
-               udelay(200);
+               usleep_range(200, 250);
        }
        if (i == 20) {
                ret = -ETIMEDOUT;