diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-esdhc-imx.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-esdhc-imx.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 8dbbc1f62b70..c391510e9ef4 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -14,6 +14,7 @@ #include <linux/clk.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/pm_qos.h> #include <linux/mmc/host.h> #include <linux/mmc/mmc.h> #include <linux/mmc/sdio.h> @@ -73,6 +74,7 @@ #define ESDHC_STROBE_DLL_CTRL_ENABLE (1 << 0) #define ESDHC_STROBE_DLL_CTRL_RESET (1 << 1) #define ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT 3 +#define ESDHC_STROBE_DLL_CTRL_SLV_UPDATE_INT_DEFAULT (4 << 20) #define ESDHC_STROBE_DLL_STATUS 0x74 #define ESDHC_STROBE_DLL_STS_REF_LOCK (1 << 1) @@ -156,6 +158,8 @@ #define ESDHC_FLAG_HS400_ES BIT(11) /* The IP has Host Controller Interface for Command Queuing */ #define ESDHC_FLAG_CQHCI BIT(12) +/* need request pmqos during low power */ +#define ESDHC_FLAG_PMQOS BIT(13) struct esdhc_soc_data { u32 flags; @@ -204,6 +208,12 @@ static const struct esdhc_soc_data usdhc_imx7d_data = { | ESDHC_FLAG_HS400, }; +static struct esdhc_soc_data usdhc_imx7ulp_data = { + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING + | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 + | ESDHC_FLAG_PMQOS | ESDHC_FLAG_HS400, +}; + static struct esdhc_soc_data usdhc_imx8qxp_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 @@ -229,6 +239,7 @@ struct pltfm_imx_data { WAIT_FOR_INT, /* sent CMD12, waiting for response INT */ } multiblock_status; u32 is_ddr; + struct pm_qos_request pm_qos_req; }; static const struct platform_device_id imx_esdhc_devtype[] = { @@ -257,6 +268,7 @@ static const struct of_device_id imx_esdhc_dt_ids[] = { { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, }, { .compatible = "fsl,imx6ull-usdhc", .data = &usdhc_imx6ull_data, }, { .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, }, + { .compatible = "fsl,imx7ulp-usdhc", .data = &usdhc_imx7ulp_data, }, { .compatible = "fsl,imx8qxp-usdhc", .data = &usdhc_imx8qxp_data, }, { /* sentinel */ } }; @@ -983,15 +995,19 @@ static void esdhc_set_strobe_dll(struct sdhci_host *host) /* force a reset on strobe dll */ writel(ESDHC_STROBE_DLL_CTRL_RESET, host->ioaddr + ESDHC_STROBE_DLL_CTRL); + /* clear the reset bit on strobe dll before any setting */ + writel(0, host->ioaddr + ESDHC_STROBE_DLL_CTRL); + /* * enable strobe dll ctrl and adjust the delay target * for the uSDHC loopback read clock */ v = ESDHC_STROBE_DLL_CTRL_ENABLE | + ESDHC_STROBE_DLL_CTRL_SLV_UPDATE_INT_DEFAULT | (7 << ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT); writel(v, host->ioaddr + ESDHC_STROBE_DLL_CTRL); - /* wait 1us to make sure strobe dll status register stable */ - udelay(1); + /* wait 5us to make sure strobe dll status register stable */ + udelay(5); v = readl(host->ioaddr + ESDHC_STROBE_DLL_STATUS); if (!(v & ESDHC_STROBE_DLL_STS_REF_LOCK)) dev_warn(mmc_dev(host->mmc), @@ -1436,6 +1452,10 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) imx_data->socdata = of_id ? of_id->data : (struct esdhc_soc_data *) pdev->id_entry->driver_data; + if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) + pm_qos_add_request(&imx_data->pm_qos_req, + PM_QOS_CPU_DMA_LATENCY, 0); + imx_data->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); if (IS_ERR(imx_data->clk_ipg)) { err = PTR_ERR(imx_data->clk_ipg); @@ -1557,6 +1577,8 @@ disable_ipg_clk: disable_per_clk: clk_disable_unprepare(imx_data->clk_per); free_sdhci: + if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) + pm_qos_remove_request(&imx_data->pm_qos_req); sdhci_pltfm_free(pdev); return err; } @@ -1578,6 +1600,9 @@ static int sdhci_esdhc_imx_remove(struct platform_device *pdev) clk_disable_unprepare(imx_data->clk_ipg); clk_disable_unprepare(imx_data->clk_ahb); + if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) + pm_qos_remove_request(&imx_data->pm_qos_req); + sdhci_pltfm_free(pdev); return 0; @@ -1649,6 +1674,9 @@ static int sdhci_esdhc_runtime_suspend(struct device *dev) } clk_disable_unprepare(imx_data->clk_ahb); + if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) + pm_qos_remove_request(&imx_data->pm_qos_req); + return ret; } @@ -1659,9 +1687,13 @@ static int sdhci_esdhc_runtime_resume(struct device *dev) struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); int err; + if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) + pm_qos_add_request(&imx_data->pm_qos_req, + PM_QOS_CPU_DMA_LATENCY, 0); + err = clk_prepare_enable(imx_data->clk_ahb); if (err) - return err; + goto remove_pm_qos_request; if (!sdhci_sdio_irq_enabled(host)) { err = clk_prepare_enable(imx_data->clk_per); @@ -1690,6 +1722,9 @@ disable_per_clk: clk_disable_unprepare(imx_data->clk_per); disable_ahb_clk: clk_disable_unprepare(imx_data->clk_ahb); +remove_pm_qos_request: + if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) + pm_qos_remove_request(&imx_data->pm_qos_req); return err; } #endif |