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From: <ansuelsmth@gmail.com>
To: "'Stanimir Varbanov'" <svarbanov@mm-sol.com>,
	"'Andy Gross'" <agross@kernel.org>
Cc: "'Sham Muthayyan'" <smuthayy@codeaurora.org>,
	"'Bjorn Andersson'" <bjorn.andersson@linaro.org>,
	"'Bjorn Helgaas'" <bhelgaas@google.com>,
	"'Rob Herring'" <robh+dt@kernel.org>,
	"'Mark Rutland'" <mark.rutland@arm.com>,
	"'Lorenzo Pieralisi'" <lorenzo.pieralisi@arm.com>,
	"'Andrew Murray'" <amurray@thegoodpenguin.co.uk>,
	"'Philipp Zabel'" <p.zabel@pengutronix.de>,
	<linux-arm-msm@vger.kernel.org>, <linux-pci@vger.kernel.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: R: R: [PATCH v2 01/10] PCIe: qcom: add missing ipq806x clocks in PCIe driver
Date: Wed, 8 Apr 2020 14:55:46 +0200	[thread overview]
Message-ID: <000401d60da5$0669a4c0$133cee40$@gmail.com> (raw)
In-Reply-To: <f333d990-6d76-0e04-5949-54ffe31bc0e9@mm-sol.com>

> in PCIe driver
> 
> Hi Ansuel,
> 
> On 4/8/20 3:36 PM, ansuelsmth@gmail.com wrote:
> >> PCIe driver
> >>
> >> Ansuel,
> >>
> >> On 4/2/20 3:11 PM, Ansuel Smith wrote:
> >>> Aux and Ref clk are missing in pcie qcom driver.
> >>> Add support in the driver to fix pcie inizialization in ipq806x.
> >>>
> >>> Fixes: 82a82383 PCI: qcom: Add Qualcomm PCIe controller driver
> >>
> >> this should be:
> >>
> >> Fixes: 82a823833f4e PCI: qcom: Add Qualcomm PCIe controller driver
> >>
> >> and add:
> >>
> >> Cc: stable@vger.kernel.org # v4.5+
> >>
> >> But, I wonder, as apq8064 shares the same ops_2_1_0 how it worked
> until
> >> now. Something more I cannot find such clocks for apq8064, which
> means
> >> that this patch will break it.
> >>
> >> One option is to use those new clocks only for ipq806x.
> >>
> >
> > How to add this new clocks only for ipq806x? Check the compatible and
> add
> > them accordingly?
> >
> 
> Yes, through of_device_is_compatible(). See how we done this in
> qcom_pcie_get_resources_2_4_0.
> 
> I thought about second option though - encoder what clocks we have for
> any SoC but if you take into that direction you have to change the whole
> driver :)
> 
> Another option is to use clk_get_optional() for the clocks which you
> have on ipq806x (and don't have on apq8064). Please research this one
> first.
> 
> --
> regards,
> Stan

Ok I will use get optional for the extra clocks. Should I add a warning if they 
are not present? Also what about the extra reset? Should I follow the same
approach? 
Thx for the suggestions. 


  reply	other threads:[~2020-04-08 12:55 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-02 12:11 [PATCH v2 00/10] Multiple fixes in PCIe qcom driver Ansuel Smith
2020-04-02 12:11 ` [PATCH v2 01/10] PCIe: qcom: add missing ipq806x clocks in PCIe driver Ansuel Smith
2020-04-08  8:50   ` Stanimir Varbanov
2020-04-08 12:36     ` R: " ansuelsmth
2020-04-08 12:48       ` Stanimir Varbanov
2020-04-08 12:55         ` ansuelsmth [this message]
2020-04-08 13:06           ` R: " Stanimir Varbanov
2020-04-02 12:11 ` [PATCH v2 02/10] devicetree: bindings: pci: add missing clks to qcom,pcie Ansuel Smith
2020-04-02 12:11 ` [PATCH v2 03/10] PCIe: qcom: change duplicate PCI reset to phy reset Ansuel Smith
2020-04-02 12:11 ` [PATCH v2 04/10] PCIe: qcom: Fixed pcie_phy_clk branch issue Ansuel Smith
2020-04-02 12:11 ` [PATCH v2 05/10] PCIe: qcom: add missing reset for ipq806x Ansuel Smith
2020-04-02 12:11 ` [PATCH v2 06/10] devicetree: bindings: pci: add ext reset to qcom,pcie Ansuel Smith
2020-04-02 12:11 ` [PATCH v2 07/10] PCIe: qcom: fix init problem with missing PARF programming Ansuel Smith
2020-04-08  8:50   ` Stanimir Varbanov
2020-04-08 12:38     ` R: " ansuelsmth
2020-04-08 13:18       ` Stanimir Varbanov
2020-04-02 12:11 ` [PATCH v2 08/10] PCIe: qcom: add ipq8064 rev2 variant and set tx term offset Ansuel Smith
2020-04-02 12:11 ` [PATCH v2 09/10] devicetree: bindings: pci: add ipq8064 rev 2 variant to qcom,pcie Ansuel Smith
2020-04-14 17:07   ` Rob Herring
2020-04-02 12:11 ` [PATCH v2 10/10] PCIe: qcom: add Force GEN1 support Ansuel Smith
2020-04-03  9:01   ` Stanimir Varbanov
2020-04-14 17:09     ` Rob Herring
2020-04-03  9:01 ` [PATCH v2 00/10] Multiple fixes in PCIe qcom driver Stanimir Varbanov

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