From: Felipe Balbi <balbi@kernel.org>
To: John Stultz <john.stultz@linaro.org>,
lkml <linux-kernel@vger.kernel.org>
Cc: John Stultz <john.stultz@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
ShuFan Lee <shufan_lee@richtek.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
Yu Chen <chenyu56@huawei.com>,
Hans de Goede <hdegoede@redhat.com>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Jun Li <lijun.kernel@gmail.com>,
Valentin Schneider <valentin.schneider@arm.com>,
Jack Pham <jackp@codeaurora.org>,
linux-usb@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH v4 5/9] usb: dwc3: Rework clock initialization to be more flexible
Date: Tue, 29 Oct 2019 11:13:56 +0200 [thread overview]
Message-ID: <87k18nj4mj.fsf@gmail.com> (raw)
In-Reply-To: <20191028215919.83697-6-john.stultz@linaro.org>
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Hi,
John Stultz <john.stultz@linaro.org> writes:
> The dwc3 core binding specifies three clocks:
> ref, bus_early, and suspend
>
> which are all controlled in the driver together.
>
> However some variants of the hardware my not have all three clks
^^
may
In fact *all* platforms have all three clocks. It's just that in some
cases clock pins are shorted together (or take input from same clock).
> So this patch reworks the reading of the clks from the dts to
> use devm_clk_bulk_get_all() will will fetch all the clocks
^^^^
which?
> specified in the dts together.
>
> This patch was reccomended by Rob Herring <robh@kernel.org>
> as an alternative to creating multiple bindings for each variant
> of hardware when the only unique bits were clocks and resets.
>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> CC: ShuFan Lee <shufan_lee@richtek.com>
> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
> Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>
> Cc: Yu Chen <chenyu56@huawei.com>
> Cc: Felipe Balbi <balbi@kernel.org>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
> Cc: Jun Li <lijun.kernel@gmail.com>
> Cc: Valentin Schneider <valentin.schneider@arm.com>
> Cc: Jack Pham <jackp@codeaurora.org>
> Cc: linux-usb@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> Suggested-by: Rob Herring <robh@kernel.org>
> Signed-off-by: John Stultz <john.stultz@linaro.org>
> ---
> v3: Rework dwc3 core rather then adding another dwc-of-simple
> binding.
> ---
> drivers/usb/dwc3/core.c | 20 +++++---------------
> 1 file changed, 5 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index a039e35ec7ad..4d4f1836b62c 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -305,12 +305,6 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
> return 0;
> }
>
> -static const struct clk_bulk_data dwc3_core_clks[] = {
> - { .id = "ref" },
> - { .id = "bus_early" },
> - { .id = "suspend" },
> -};
another option would be to pass three clocks with the same phandle. That
would even make sure that clock usage counts are correct, no?
--
balbi
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next prev parent reply other threads:[~2019-10-29 9:14 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-28 21:59 [PATCH v4 0/9] Prereqs for HiKey960 USB support John Stultz
2019-10-28 21:59 ` [PATCH v4 1/9] dt-bindings: usb: rt1711h: Add connector bindings John Stultz
2019-10-28 21:59 ` [PATCH v4 2/9] usb: dwc3: Execute GCTL Core Soft Reset while switch modes John Stultz
2019-10-29 9:09 ` Felipe Balbi
2019-10-29 21:21 ` John Stultz
2019-10-28 21:59 ` [PATCH v4 3/9] usb: dwc3: Increase timeout for CmdAct cleared by device controller John Stultz
2019-10-29 9:11 ` Felipe Balbi
2019-10-29 21:17 ` John Stultz
2020-05-06 9:00 ` Jun Li
2020-05-06 22:27 ` John Stultz
2020-05-07 3:08 ` Jun Li
2020-05-08 12:22 ` Jun Li
2020-05-08 12:35 ` Felipe Balbi
2020-05-09 8:28 ` Jun Li
2020-05-08 12:33 ` Felipe Balbi
2020-05-09 8:10 ` Jun Li
2020-05-15 9:31 ` Felipe Balbi
2020-05-15 10:07 ` Jun Li
2020-05-15 10:41 ` Felipe Balbi
2020-05-16 0:25 ` Thinh Nguyen
2020-05-16 7:12 ` Felipe Balbi
2020-05-16 9:20 ` Jun Li
2020-05-16 11:57 ` Felipe Balbi
2020-05-19 2:24 ` Jun Li
2020-05-19 6:28 ` Thinh Nguyen
2020-05-19 6:46 ` Thinh Nguyen
2020-05-19 7:39 ` Jun Li
2020-05-21 1:07 ` Thinh Nguyen
2020-05-21 1:55 ` Thinh Nguyen
2020-05-21 6:20 ` Felipe Balbi
2020-05-21 6:22 ` Felipe Balbi
2020-05-21 7:47 ` Jun Li
2020-05-21 7:33 ` Jun Li
2019-10-28 21:59 ` [PATCH v4 4/9] dt-bindings: usb: dwc3: Allow clock list & resets to be more flexible John Stultz
2019-10-28 21:59 ` [PATCH v4 5/9] usb: dwc3: Rework clock initialization " John Stultz
2019-10-29 9:13 ` Felipe Balbi [this message]
2019-10-29 16:08 ` John Stultz
2019-10-30 9:02 ` Felipe Balbi
2019-11-07 21:53 ` Rob Herring
2019-10-28 21:59 ` [PATCH v4 6/9] usb: dwc3: Rework resets " John Stultz
2019-10-29 9:17 ` Felipe Balbi
2019-10-29 18:05 ` John Stultz
2019-10-30 9:01 ` Felipe Balbi
2019-11-07 21:45 ` Rob Herring
2019-10-28 21:59 ` [PATCH v4 7/9] usb: dwc3: Registering a role switch in the DRD code John Stultz
2019-10-29 9:21 ` Felipe Balbi
2019-11-07 23:20 ` John Stultz
2019-10-28 21:59 ` [PATCH v4 8/9] dt-bindings: usb: generic: Add role-switch-default-host binding John Stultz
2019-10-29 9:23 ` Felipe Balbi
2019-10-29 18:26 ` John Stultz
2019-10-28 21:59 ` [PATCH v4 9/9] usb: dwc3: Add host-mode as default support John Stultz
2019-10-29 9:25 ` Felipe Balbi
2019-11-07 22:23 ` John Stultz
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