From d19c6bfe52fbd7e21688ea0d77b8bb9d6304d475 Mon Sep 17 00:00:00 2001 From: Amelie Delaunay Date: Tue, 5 Jan 2021 10:48:54 +0100 Subject: [PATCH] FROMGIT: usb: dwc2: enable FS/LS PHY clock select on STM32MP15 FS OTG When the core is in FS host mode, using the FS transceiver, and a Low-Speed device is connected, transceiver clock is 6Mhz. So, to support Low-Speed devices, enable support of FS/LS Low Power mode, so that the PHY supplies a 6 MHz clock during Low-Speed mode. Acked-by: Minas Harutyunyan Signed-off-by: Amelie Delaunay Link: https://lore.kernel.org/r/20210105094855.30763-3-amelie.delaunay@foss.st.com Signed-off-by: Greg Kroah-Hartman (cherry picked from commit f228cb27c56163dcb55dfb62e176a08f45020faf https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-next) Signed-off-by: Greg Kroah-Hartman Change-Id: I2afe995aa0eb3b2c3f1e271f86bb44784a26dda8 --- drivers/usb/dwc2/params.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index 0df693319f0a..9e5dd7f3f2f6 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -179,6 +179,8 @@ static void dwc2_set_stm32mp15_fsotg_params(struct dwc2_hsotg *hsotg) p->activate_stm_id_vb_detection = true; p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT; p->power_down = DWC2_POWER_DOWN_PARAM_NONE; + p->host_support_fs_ls_low_power = true; + p->host_ls_low_power_phy_clk = true; } static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg)