diff options
| author | Ray Chi <raychi@google.com> | 2021-02-22 19:51:48 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-10 09:37:14 +0100 |
| commit | 6f0764b5adea18d70c3fab32d5f940678bcbd865 (patch) | |
| tree | 9d43115af749f47e1e09de0fa654897fc073fb32 /drivers/usb/dwc3/core.c | |
| parent | a38fd8748464831584a19438cbb3082b5a2dab15 (diff) | |
usb: dwc3: add a power supply for current control
Currently, VBUS draw callback does no action when the
generic PHYs are used. This patch adds an additional
path to control charging current through power supply
interface.
Signed-off-by: Ray Chi <raychi@google.com>
Link: https://lore.kernel.org/r/20210222115149.3606776-2-raychi@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc3/core.c')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index f2448d0a9d39..d15f065849cd 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1238,6 +1238,8 @@ static void dwc3_get_properties(struct dwc3 *dwc) u8 rx_max_burst_prd; u8 tx_thr_num_pkt_prd; u8 tx_max_burst_prd; + const char *usb_psy_name; + int ret; /* default to highest possible threshold */ lpm_nyet_threshold = 0xf; @@ -1263,6 +1265,13 @@ static void dwc3_get_properties(struct dwc3 *dwc) else dwc->sysdev = dwc->dev; + ret = device_property_read_string(dev, "usb-psy-name", &usb_psy_name); + if (ret >= 0) { + dwc->usb_psy = power_supply_get_by_name(usb_psy_name); + if (!dwc->usb_psy) + dev_err(dev, "couldn't get usb power supply\n"); + } + dwc->has_lpm_erratum = device_property_read_bool(dev, "snps,has-lpm-erratum"); device_property_read_u8(dev, "snps,lpm-nyet-threshold", @@ -1619,6 +1628,9 @@ disable_clks: assert_reset: reset_control_assert(dwc->reset); + if (!dwc->usb_psy) + power_supply_put(dwc->usb_psy); + return ret; } @@ -1641,6 +1653,9 @@ static int dwc3_remove(struct platform_device *pdev) dwc3_free_event_buffers(dwc); dwc3_free_scratch_buffers(dwc); + if (!dwc->usb_psy) + power_supply_put(dwc->usb_psy); + return 0; } |