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mmc: sdhci-esdhc-imx: add pm_qos to interact with cpuidle 

On some SoCs such as i.MX7ULP, there is no busfreq
driver, but cpuidle has some levels which may disable
system/bus clocks, so need to add pm_qos to prevent
cpuidle from entering low level idles and make sure
system/bus clocks are enabled when usdhc is active.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
BOUGH CHEN 2019-04-29 08:55:37 +00:00 committed by Ulf Hansson
parent d3db80ca57
commit 1c4989b000
1 changed files with 31 additions and 1 deletions
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32
drivers/mmc/host/sdhci-esdhc-imx.c
View File

@ -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>
@ -156,6 +157,8 @@
#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 +207,12 @@ 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,
};
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 +238,7 @@ 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 +267,7 @@ 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 */ }
};
@ -1436,6 +1447,10 @@ 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 +1572,8 @@ 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 +1595,9 @@ 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 +1669,9 @@ 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 +1682,13 @@ 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 +1717,9 @@ 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