From: Claudiu Beznea Date: Tue, 13 Dec 2022 11:28:50 +0000 (+0200) Subject: ASoC: mchp-pdmc: add support for suspend to RAM X-Git-Tag: v6.6.7~3340^2~4^2~182^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=404c61c47d84bf1662e9d698e4f0c42898893c59;p=platform%2Fkernel%2Flinux-starfive.git ASoC: mchp-pdmc: add support for suspend to RAM Add support for suspend to RAM by re-aranging the lines in switch..case from mchp_pdmc_trigger() and saving/restoring the enabled interrupts. These are necessary as AT91 devices has a special power saving mode (called backup and self-refresh) where most of the SoC parts are powered off and thus we need to reconfigure the PDMC on resume. Signed-off-by: Claudiu Beznea Link: https://lore.kernel.org/r/20221213112851.89212-4-claudiu.beznea@microchip.com Signed-off-by: Mark Brown --- diff --git a/sound/soc/atmel/mchp-pdmc.c b/sound/soc/atmel/mchp-pdmc.c index f184404..cf4084d 100644 --- a/sound/soc/atmel/mchp-pdmc.c +++ b/sound/soc/atmel/mchp-pdmc.c @@ -113,6 +113,7 @@ struct mchp_pdmc { struct clk *pclk; struct clk *gclk; u32 pdmcen; + u32 suspend_irq; int mic_no; int sinc_order; bool audio_filter_en; @@ -641,22 +642,27 @@ static int mchp_pdmc_trigger(struct snd_pcm_substream *substream, #endif switch (cmd) { - case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_START: /* Enable overrun and underrun error interrupts */ - regmap_write(dd->regmap, MCHP_PDMC_IER, + regmap_write(dd->regmap, MCHP_PDMC_IER, dd->suspend_irq | MCHP_PDMC_IR_RXOVR | MCHP_PDMC_IR_RXUDR); + dd->suspend_irq = 0; + fallthrough; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: snd_soc_component_update_bits(cpu, MCHP_PDMC_MR, MCHP_PDMC_MR_PDMCEN_MASK, dd->pdmcen); break; - case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + regmap_read(dd->regmap, MCHP_PDMC_IMR, &dd->suspend_irq); + fallthrough; + case SNDRV_PCM_TRIGGER_STOP: /* Disable overrun and underrun error interrupts */ - regmap_write(dd->regmap, MCHP_PDMC_IDR, + regmap_write(dd->regmap, MCHP_PDMC_IDR, dd->suspend_irq | MCHP_PDMC_IR_RXOVR | MCHP_PDMC_IR_RXUDR); + fallthrough; + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: snd_soc_component_update_bits(cpu, MCHP_PDMC_MR, MCHP_PDMC_MR_PDMCEN_MASK, 0); break; @@ -1107,6 +1113,7 @@ static const struct of_device_id mchp_pdmc_of_match[] = { MODULE_DEVICE_TABLE(of, mchp_pdmc_of_match); static const struct dev_pm_ops mchp_pdmc_pm_ops = { + SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) RUNTIME_PM_OPS(mchp_pdmc_runtime_suspend, mchp_pdmc_runtime_resume, NULL) };