From: Rander Wang Date: Fri, 10 Jan 2020 21:57:27 +0000 (-0600) Subject: soundwire: cadence_master: clear interrupt status before enabling interrupt X-Git-Tag: v5.6-rc1~136^2~7^2~13 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5ebb0945419e5845137102c20b99714ea574a3d8;p=thirdparty%2Fkernel%2Flinux.git soundwire: cadence_master: clear interrupt status before enabling interrupt make sure all interrupts status are cleared before enabling interrupt so that there is no unexpected interrupt triggered. Signed-off-by: Rander Wang Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20200110215731.30747-3-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul --- diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index a0ec21b64d422..847b8f5f0a32e 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -856,6 +856,16 @@ int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state) mask = interrupt_mask; update_masks: + /* clear slave interrupt status before enabling interrupt */ + if (state) { + u32 slave_state; + + slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0); + cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave_state); + slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1); + cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave_state); + } + cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK0, slave_intmask0); cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, slave_intmask1); cdns_writel(cdns, CDNS_MCP_INTMASK, mask);