[PATCH v3 03/11] i2c: riic: Use pm_runtime_resume_and_get()

Claudiu
2024-07-11T11:52:25Z

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

pm_runtime_get_sync() may return with error. In case it returns with error
dev->power.usage_count needs to be decremented. pm_runtime_resume_and_get()
takes care of this. Thus use it.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v3:
- dropped error message on pm_runtime_resume_and_get() failures
- restored initial place of i2c_del_adapter() in riic_i2c_remove()

Changes in v2:
- delete i2c adapter all the time in remove

drivers/i2c/busses/i2c-riic.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/i2c/busses/i2c-riic.c b/drivers/i2c/busses/i2c-riic.c
index af7edc26462c..068f90ecf27e 100644
--- a/drivers/i2c/busses/i2c-riic.c
+++ b/drivers/i2c/busses/i2c-riic.c
@@ -133,10 +133,12 @@ static int riic_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
struct riic_dev *riic = i2c_get_adapdata(adap);
struct device *dev = adap->dev.parent;
unsigned long time_left;
- int i;
+ int i, ret;
u8 start_bit;

- pm_runtime_get_sync(dev);
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret)
+ return ret;

if (riic_readb(riic, RIIC_ICCR2) & ICCR2_BBSY) {
riic->err = -EBUSY;
@@ -301,6 +303,7 @@ static const struct i2c_algorithm riic_algo = {

static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t)
{
+ int ret;
unsigned long rate;
int total_ticks, cks, brl, brh;
struct device *dev = riic->adapter.dev.parent;
@@ -379,7 +382,9 @@ static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t)
t->scl_fall_ns / (1000000000 / rate),
t->scl_rise_ns / (1000000000 / rate), cks, brl, brh);

- pm_runtime_get_sync(dev);
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret)
+ return ret;

/* Changing the order of accessing IICRST and ICE may break things! */
riic_writeb(riic, ICCR1_IICRST | ICCR1_SOWP, RIIC_ICCR1);
@@ -498,10 +503,13 @@ static void riic_i2c_remove(struct platform_device *pdev)
{
struct riic_dev *riic = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
+ int ret;

- pm_runtime_get_sync(dev);
- riic_writeb(riic, 0, RIIC_ICIER);
- pm_runtime_put(dev);
+ ret = pm_runtime_resume_and_get(dev);
+ if (!ret) {
+ riic_writeb(riic, 0, RIIC_ICIER);
+ pm_runtime_put(dev);
+ }
i2c_del_adapter(&riic->adapter);
pm_runtime_disable(dev);
}
--
2.39.2