From 3ccb8551f52edfcf16291cde07a8d49fc3976b7a Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Tue, 22 Oct 2019 18:54:48 -0500 Subject: 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 Link: https://lore.kernel.org/r/20191022235448.17586-6-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul --- drivers/soundwire/cadence_master.c | 15 ++++++++------- drivers/soundwire/cadence_master.h | 2 +- drivers/soundwire/intel.c | 2 +- 3 files changed, 10 insertions(+), 9 deletions(-) (limited to 'drivers/soundwire') 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); } /* -- cgit v1.2.3