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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 May 2023 19:03:43.8115 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: dddb80ba-4746-4c16-c13f-08db52527104 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT075.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN6PR12MB8515 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org This commit implements the runtime PM operations for BlueField-3 SoC to disable eMMC card clock when idle. Reviewed-by: David Thompson Signed-off-by: Liming Sun --- drivers/mmc/host/sdhci-of-dwcmshc.c | 76 ++++++++++++++++++++++++++++- 1 file changed, 74 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c index e68cd87998c8..19ce058fc5f0 100644 --- a/drivers/mmc/host/sdhci-of-dwcmshc.c +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -542,8 +543,10 @@ static int dwcmshc_probe(struct platform_device *pdev) } #ifdef CONFIG_ACPI - if (pltfm_data == &sdhci_dwcmshc_bf3_pdata) + if (pltfm_data == &sdhci_dwcmshc_bf3_pdata) { sdhci_enable_v4_mode(host); + pm_runtime_enable(dev); + } #endif host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY; @@ -646,7 +649,76 @@ static int dwcmshc_resume(struct device *dev) } #endif -static SIMPLE_DEV_PM_OPS(dwcmshc_pmops, dwcmshc_suspend, dwcmshc_resume); +#ifdef CONFIG_PM + +#ifdef CONFIG_ACPI +static void dwcmshc_enable_card_clk(struct sdhci_host *host) +{ + u16 ctrl; + + ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + ctrl |= SDHCI_CLOCK_CARD_EN; + sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL); +} + +static void dwcmshc_disable_card_clk(struct sdhci_host *host) +{ + u16 ctrl; + + ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + ctrl &= ~SDHCI_CLOCK_CARD_EN; + sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL); +} +#endif + +static int dwcmshc_runtime_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + const struct sdhci_pltfm_data *pltfm_data; + int ret = 0; + + pltfm_data = device_get_match_data(dev); + if (!pltfm_data) + return -ENODEV; + +#ifdef CONFIG_ACPI + if (pltfm_data == &sdhci_dwcmshc_bf3_pdata) { + ret = sdhci_runtime_suspend_host(host); + if (!ret) + dwcmshc_disable_card_clk(host); + } +#endif + + return ret; +} + +static int dwcmshc_runtime_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + const struct sdhci_pltfm_data *pltfm_data; + int ret = 0; + + pltfm_data = device_get_match_data(dev); + if (!pltfm_data) + return -ENODEV; + +#ifdef CONFIG_ACPI + if (pltfm_data == &sdhci_dwcmshc_bf3_pdata) { + dwcmshc_enable_card_clk(host); + ret = sdhci_runtime_resume_host(host, 0); + } +#endif + + return ret; +} + +#endif + +static const struct dev_pm_ops dwcmshc_pmops = { + SET_SYSTEM_SLEEP_PM_OPS(dwcmshc_suspend, dwcmshc_resume) + SET_RUNTIME_PM_OPS(dwcmshc_runtime_suspend, + dwcmshc_runtime_resume, NULL) +}; static struct platform_driver sdhci_dwcmshc_driver = { .driver = {