drm/stm: dw_mipi_dsi-stm: add sleep power management

	return 0;

}

static int __maybe_unused dw_mipi_dsi_stm_suspend(struct device *dev)

{

	struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;

	DRM_DEBUG_DRIVER("\n");

	clk_disable_unprepare(dsi->pllref_clk);

	return 0;

}

static int __maybe_unused dw_mipi_dsi_stm_resume(struct device *dev)

{

	struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;

	DRM_DEBUG_DRIVER("\n");

	clk_prepare_enable(dsi->pllref_clk);

	return 0;

}

static const struct dev_pm_ops dw_mipi_dsi_stm_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(dw_mipi_dsi_stm_suspend,

				dw_mipi_dsi_stm_resume)

};

static struct platform_driver dw_mipi_dsi_stm_driver = {

	.probe		= dw_mipi_dsi_stm_probe,

	.remove		= dw_mipi_dsi_stm_remove,

	.driver		= {

		.of_match_table = dw_mipi_dsi_stm_dt_ids,

		.name	= "stm32-display-dsi",

		.pm = &dw_mipi_dsi_stm_pm_ops,

	},

};