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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2019-10-22 18:54:48 -0500
committerVinod Koul <vkoul@kernel.org>2019-10-24 17:22:01 +0530
commit3ccb8551f52edfcf16291cde07a8d49fc3976b7a (patch)
tree3fd2ce46d73edd1cb6c91397b53d546e7f756941 /drivers/soundwire
parent9e3d47fb2bdc203c8cb63cbebdff99adcee76f5f (diff)
downloadlinux-3ccb8551f52edfcf16291cde07a8d49fc3976b7a.tar.bz2
soundwire: cadence_master: make clock stop exit configurable on init
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. For now clock-stop is not supported anyways so the control parameter is always false. This will be revisited when we add clock stop. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20191022235448.17586-6-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire')
-rw-r--r--drivers/soundwire/cadence_master.c15
-rw-r--r--drivers/soundwire/cadence_master.h2
-rw-r--r--drivers/soundwire/intel.c2
3 files changed, 10 insertions, 9 deletions
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index d2c44bfff53a..fed21e2b2277 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -979,7 +979,7 @@ static u32 cdns_set_initial_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;
@@ -987,12 +987,13 @@ 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 a106aea6fe53..001457cbe5ad 100644
--- a/drivers/soundwire/cadence_master.h
+++ b/drivers/soundwire/cadence_master.h
@@ -138,7 +138,7 @@ 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 8d32d8eaff1c..3a6bbf0ff04e 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -903,7 +903,7 @@ 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);
}
/*