i2c: sh_mobile: let RuntimePM do the clock handling
Start RuntimePM a bit earlier, so we can use it to enable the clock
during probe for frequency calculations. Make sure it is enabled before
calling setup().
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
index 88af452..f1a9b97 100644
--- a/drivers/i2c/busses/i2c-sh_mobile.c
+++ b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -252,11 +252,7 @@
u32 tHIGH, tLOW, tf;
uint16_t max_val;
- /* Get clock rate after clock is enabled */
- clk_prepare_enable(pd->clk);
- i2c_clk_khz = clk_get_rate(pd->clk) / 1000;
- clk_disable_unprepare(pd->clk);
- i2c_clk_khz /= pd->clks_per_count;
+ i2c_clk_khz = clk_get_rate(pd->clk) / 1000 / pd->clks_per_count;
if (pd->bus_speed == STANDARD_MODE) {
tLOW = 47; /* tLOW = 4.7 us */
@@ -881,21 +877,6 @@
if (resource_size(res) > 0x17)
pd->flags |= IIC_FLAG_HAS_ICIC67;
- config = of_device_get_match_data(&dev->dev);
- if (config) {
- pd->clks_per_count = config->clks_per_count;
- ret = config->setup(pd);
- } else {
- ret = sh_mobile_i2c_init(pd);
- }
- if (ret)
- return ret;
-
- /* Init DMA */
- sg_init_table(&pd->sg, 1);
- pd->dma_direction = DMA_NONE;
- pd->dma_rx = pd->dma_tx = ERR_PTR(-EPROBE_DEFER);
-
/* Enable Runtime PM for this device.
*
* Also tell the Runtime PM core to ignore children
@@ -908,6 +889,24 @@
*/
pm_suspend_ignore_children(&dev->dev, true);
pm_runtime_enable(&dev->dev);
+ pm_runtime_get_sync(&dev->dev);
+
+ config = of_device_get_match_data(&dev->dev);
+ if (config) {
+ pd->clks_per_count = config->clks_per_count;
+ ret = config->setup(pd);
+ } else {
+ ret = sh_mobile_i2c_init(pd);
+ }
+
+ pm_runtime_put_sync(&dev->dev);
+ if (ret)
+ return ret;
+
+ /* Init DMA */
+ sg_init_table(&pd->sg, 1);
+ pd->dma_direction = DMA_NONE;
+ pd->dma_rx = pd->dma_tx = ERR_PTR(-EPROBE_DEFER);
/* setup the private data */
adap = &pd->adap;