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mmc: mtk-sd: add support for SPM resource release control

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The MT8189 SoC has in the status register an additional bit field to
release all System Power management (SPM) resource requests.
In preparation of MT8189 SoC support, add its use in suspend callback
and a support flag in the platform data.

Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Louis-Alexis Eyraud 2025-12-03 12:45:35 +01:00 committed by Ulf Hansson
parent 7514f64780
commit a834e60c8a
1 changed files with 9 additions and 3 deletions
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12
drivers/mmc/host/mtk-sd.c
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@ -203,9 +203,10 @@
#define SDC_CFG_DTOC GENMASK(31, 24) /* RW */
/* SDC_STS mask */
#define SDC_STS_SDCBUSY BIT(0) /* RW */
#define SDC_STS_CMDBUSY BIT(1) /* RW */
#define SDC_STS_SWR_COMPL BIT(31) /* RW */
#define SDC_STS_SDCBUSY BIT(0) /* RW */
#define SDC_STS_CMDBUSY BIT(1) /* RW */
#define SDC_STS_SPM_RESOURCE_RELEASE BIT(3) /* RW */
#define SDC_STS_SWR_COMPL BIT(31) /* RW */
/* SDC_ADV_CFG0 mask */
#define SDC_DAT1_IRQ_TRIGGER BIT(19) /* RW */
@ -448,6 +449,7 @@ struct mtk_mmc_compatible {
bool use_internal_cd;
bool support_new_tx;
bool support_new_rx;
bool support_spm_res_release;
};
struct msdc_tune_para {
@ -3296,6 +3298,10 @@ static int msdc_runtime_suspend(struct device *dev)
__msdc_enable_sdio_irq(host, 0);
}
if (host->dev_comp->support_spm_res_release)
sdr_set_bits(host->base + SDC_STS, SDC_STS_SPM_RESOURCE_RELEASE);
msdc_gate_clock(host);
return 0;
}