[PATCH 7/9] bus: ti-sysc: Handle otg force idle quirk
From: Tony Lindgren <tony@atomide.com>
Date: 2021-09-21 10:02:03
Also in:
linux-omap, lkml
Subsystem:
omap2+ support, the rest · Maintainers:
Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
Let's add handling the otg force idle quirk for the old omap2430 glue layer used up to omap4 as the musb driver quirk only works if the driver is loaded. Unlike with the am335x glue layer, looks like we don't need the quirk handling for SYSC_QUIRK_REINIT_ON_CTX_LOST. Eventually when all the musb using SoCs are booting with device tree based configuration, we can just remove the related quirk handling from the musb driver. Signed-off-by: Tony Lindgren <tony@atomide.com> --- drivers/bus/ti-sysc.c | 24 +++++++++++++++++++++++- include/linux/platform_data/ti-sysc.h | 1 + 2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c@@ -1610,7 +1610,8 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = { SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -ENODEV, 0x50700101, 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY), SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050, - 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY), + 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY | + SYSC_MODULE_QUIRK_OTG), SYSC_QUIRK("usb_otg_hs", 0, 0, 0x10, -ENODEV, 0x4ea2080d, 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY | SYSC_QUIRK_REINIT_ON_CTX_LOST),
@@ -1969,6 +1970,22 @@ static void sysc_module_lock_quirk_rtc(struct sysc *ddata) sysc_quirk_rtc(ddata, true); } +/* OTG omap2430 glue layer up to omap4 needs OTG_FORCESTDBY configured */ +static void sysc_module_enable_quirk_otg(struct sysc *ddata) +{ + int offset = 0x414; /* OTG_FORCESTDBY */ + + sysc_write(ddata, offset, 0); +} + +static void sysc_module_disable_quirk_otg(struct sysc *ddata) +{ + int offset = 0x414; /* OTG_FORCESTDBY */ + u32 val = BIT(0); /* ENABLEFORCE */ + + sysc_write(ddata, offset, val); +} + /* 36xx SGX needs a quirk for to bypass OCP IPG interrupt logic */ static void sysc_module_enable_quirk_sgx(struct sysc *ddata) {
@@ -2051,6 +2068,11 @@ static void sysc_init_module_quirks(struct sysc *ddata) return; } + if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_OTG) { + ddata->module_enable_quirk = sysc_module_enable_quirk_otg; + ddata->module_disable_quirk = sysc_module_disable_quirk_otg; + } + if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_SGX) ddata->module_enable_quirk = sysc_module_enable_quirk_sgx;
diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h
--- a/include/linux/platform_data/ti-sysc.h
+++ b/include/linux/platform_data/ti-sysc.h@@ -50,6 +50,7 @@ struct sysc_regbits { s8 emufree_shift; }; +#define SYSC_MODULE_QUIRK_OTG BIT(30) #define SYSC_QUIRK_RESET_ON_CTX_LOST BIT(29) #define SYSC_QUIRK_REINIT_ON_CTX_LOST BIT(28) #define SYSC_QUIRK_REINIT_ON_RESUME BIT(27)
--
2.33.0
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