On Thu, Jul 25, 2019 at 06:40:30PM -0500, Pierre-Louis Bossart wrote:
The use of clock stop is not a requirement, the IP can e.g. be completely power gated and not detect any wakes while in s2idle/deep sleep.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
drivers/soundwire/cadence_master.c | 15 ++++++++------- drivers/soundwire/cadence_master.h | 2 +- drivers/soundwire/intel.c | 2 +- 3 files changed, 10 insertions(+), 9 deletions(-)
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 53278aa2436f..4ab6f70d7705 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -1010,7 +1010,7 @@ static u32 cdns_set_default_frame_shape(int n_rows, int n_cols)
- sdw_cdns_init() - Cadence initialization
- @cdns: Cadence instance
*/ -int sdw_cdns_init(struct sdw_cdns *cdns) +int sdw_cdns_init(struct sdw_cdns *cdns, bool clock_stop_exit) { struct sdw_bus *bus = &cdns->bus; struct sdw_master_prop *prop = &bus->prop; @@ -1018,12 +1018,13 @@ int sdw_cdns_init(struct sdw_cdns *cdns) int divider; int ret;
- /* Exit clock stop */
- ret = cdns_clear_bit(cdns, CDNS_MCP_CONTROL,
CDNS_MCP_CONTROL_CLK_STOP_CLR);- if (ret < 0) {
dev_err(cdns->dev, "Couldn't exit from clock stop\n");return ret;
if (clock_stop_exit) {
ret = cdns_clear_bit(cdns, CDNS_MCP_CONTROL,CDNS_MCP_CONTROL_CLK_STOP_CLR);if (ret < 0) {dev_err(cdns->dev, "Couldn't exit from clock stop\n");return ret;}}
/* Set clock divider */
diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h index 1a0ba36dd78f..091b771b570d 100644 --- a/drivers/soundwire/cadence_master.h +++ b/drivers/soundwire/cadence_master.h @@ -158,7 +158,7 @@ extern struct sdw_master_ops sdw_cdns_master_ops; irqreturn_t sdw_cdns_irq(int irq, void *dev_id); irqreturn_t sdw_cdns_thread(int irq, void *dev_id);
-int sdw_cdns_init(struct sdw_cdns *cdns); +int sdw_cdns_init(struct sdw_cdns *cdns, bool clock_stop_exit); int sdw_cdns_pdi_init(struct sdw_cdns *cdns, struct sdw_cdns_stream_config config); int sdw_cdns_exit_reset(struct sdw_cdns *cdns); diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 1192d5775484..db7bf2912767 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -1043,7 +1043,7 @@ static int intel_init(struct sdw_intel *sdw) intel_link_power_up(sdw); intel_shim_init(sdw);
- return sdw_cdns_init(&sdw->cdns);
- return sdw_cdns_init(&sdw->cdns, false);
This is the only caller of this function so far, so, it looks like the second argument ATM is always "false." I assume you foresee other uses with "true" in the future, otherwise maybe just fix it to false in the function?
Thanks Guennadi
}
/*
2.20.1
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