[PATCH 3/3] spi: rockchip: Fix clock handling in suspend/resume

[Jeffy Chen]

The runtime suspend callback might be called by pm domain framework at
suspend_noirq stage. It would try to disable the clocks which already
been disabled by rockchip_spi_suspend.

Call pm_runtime_force_suspend/pm_runtime_force_resume when
suspend/resume to avoid that.

Signed-off-by: Jeffy Chen <jeffy.c...@rock-chips.com>
---

 drivers/spi/spi-rockchip.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index a75fd9b..34f6440 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -846,10 +846,9 @@ static int rockchip_spi_suspend(struct device *dev)
        if (ret < 0)
                return ret;
 
-       if (!pm_runtime_suspended(dev)) {
-               clk_disable_unprepare(rs->spiclk);
-               clk_disable_unprepare(rs->apb_pclk);
-       }
+       ret = pm_runtime_force_suspend(dev);
+       if (ret < 0)
+               return ret;
 
        pinctrl_pm_select_sleep_state(dev);
 
@@ -864,17 +863,9 @@ static int rockchip_spi_resume(struct device *dev)
 
        pinctrl_pm_select_default_state(dev);
 
-       if (!pm_runtime_suspended(dev)) {
-               ret = clk_prepare_enable(rs->apb_pclk);
-               if (ret < 0)
-                       return ret;
-
-               ret = clk_prepare_enable(rs->spiclk);
-               if (ret < 0) {
-                       clk_disable_unprepare(rs->apb_pclk);
-                       return ret;
-               }
-       }
+       ret = pm_runtime_force_resume(dev);
+       if (ret < 0)
+               return ret;
 
        ret = spi_master_resume(rs->master);
        if (ret < 0) {
-- 
2.1.4