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SubjectRE: [PATCH v4 5/5] arm64: dts: Add node for ufs exynos7
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Hi Pawel

> -----Original Message-----
> From: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
> Sent: 28 March 2020 19:00
> To: Alim Akhtar <alim.akhtar@samsung.com>; robh+dt@kernel.org;
> devicetree@vger.kernel.org; linux-scsi@vger.kernel.org
> Cc: krzk@kernel.org; avri.altman@wdc.com; martin.petersen@oracle.com;
> kwmad.kim@samsung.com; stanley.chu@mediatek.com;
> cang@codeaurora.org; linux-samsung-soc@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v4 5/5] arm64: dts: Add node for ufs exynos7
>
> On Fri, 2020-03-27 at 22:36 +0530, Alim Akhtar wrote:
> > Adding dt node foe UFS and UFS-PHY for exynos7 SoC.
> >
> > Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
> > ---
> > .../boot/dts/exynos/exynos7-espresso.dts | 16 +++++++
> > arch/arm64/boot/dts/exynos/exynos7.dtsi | 43 ++++++++++++++++++-
> > 2 files changed, 57 insertions(+), 2 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
> > b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
> > index 7af288fa9475..b59a0a32620a 100644
> > --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
> > +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
> > @@ -406,6 +406,22 @@
> > };
> > };
> >
> > +&ufs {
> > + status = "okay";
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&ufs_rst_n &ufs_refclk_out>;
> > + ufs,pwr-attr-mode = "FAST";
> > + ufs,pwr-attr-lane = <2>;
> > + ufs,pwr-attr-gear = <2>;
> > + ufs,pwr-attr-hs-series = "HS_rate_b";
> > + ufs-rx-adv-fine-gran-sup_en = <1>;
> > + ufs-rx-adv-fine-gran-step = <3>;
> > + ufs-rx-adv-min-activate-time-cap = <9>;
> > + ufs-pa-granularity = <6>;
> > + ufs-pa-tacctivate = <3>;
> > + ufs-pa-hibern8time = <20>;
> > +};
> > +
> > &usbdrd_phy {
> > vbus-supply = <&usb30_vbus_reg>;
> > vbus-boost-supply = <&usb3drd_boost_5v>; diff --git
> > a/arch/arm64/boot/dts/exynos/exynos7.dtsi
> > b/arch/arm64/boot/dts/exynos/exynos7.dtsi
> > index 5558045637ac..9d16c90edd07 100644
> > --- a/arch/arm64/boot/dts/exynos/exynos7.dtsi
> > +++ b/arch/arm64/boot/dts/exynos/exynos7.dtsi
> > @@ -220,9 +220,14 @@
> > #clock-cells = <1>;
> > clocks = <&fin_pll>, <&clock_top1
> DOUT_ACLK_FSYS1_200>,
> > <&clock_top1 DOUT_SCLK_MMC0>,
> > - <&clock_top1 DOUT_SCLK_MMC1>;
> > + <&clock_top1 DOUT_SCLK_MMC1>,
> > + <&clock_top1 DOUT_SCLK_UFSUNIPRO20>,
> > + <&clock_top1 DOUT_SCLK_PHY_FSYS1>,
> > + <&clock_top1 DOUT_SCLK_PHY_FSYS1_26M>;
> > clock-names = "fin_pll", "dout_aclk_fsys1_200",
> > - "dout_sclk_mmc0", "dout_sclk_mmc1";
> > + "dout_sclk_mmc0", "dout_sclk_mmc1",
> > + "dout_sclk_ufsunipro20",
> "dout_sclk_phy_fsys1",
> > + "dout_sclk_phy_fsys1_26m";
> > };
> >
> > serial_0: serial@13630000 {
> > @@ -601,6 +606,40 @@
> > };
> > };
> >
> > + ufs: ufs@15570000 {
> > + compatible = "samsung,exynos7-ufs";
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges;
> > + reg = <0x15570000 0x100>, /* 0: HCI standard */
> > + <0x15570100 0x100>, /* 1: Vendor specificed
> */
> > + <0x15571000 0x200>, /* 2: UNIPRO */
> > + <0x15572000 0x300>; /* 3: UFS protector */
> > + reg-names = "hci", "vs_hci", "unipro", "ufsp";
> > + interrupts = <GIC_SPI 200 IRQ_TYPE_LEVEL_HIGH>;
> > + clocks = <&clock_fsys1 ACLK_UFS20_LINK>,
> > + <&clock_fsys1 SCLK_UFSUNIPRO20_USER>;
> > + clock-names = "core_clk", "sclk_unipro_main";
> > + freq-table-hz = <0 0>, <0 0>;
> > + pclk-freq-avail-range = <70000000 133000000>;
> > + ufs,pwr-local-l2-timer = <8000 28000 20000>;
> > + ufs,pwr-remote-l2-timer = <12000 32000 16000>;
> > + phys = <&ufs_phy>;
> > + phy-names = "ufs-phy";
> > + status = "disabled";
> > + };
> > +
> > + ufs_phy: ufs-phy@0x15571800 {
> > + compatible = "samsung,exynos7-ufs-phy";
> > + reg = <0x15571800 0x240>;
> > + reg-names = "phy-pma";
> > + samsung,pmu-syscon = <&pmu_system_controller>;
> > + #phy-cells = <0>;
> > + clocks = <&clock_fsys1 MOUT_FSYS1_PHYCLK_SEL1>,
> > + <&clock_top1 CLK_SCLK_PHY_FSYS1_26M>;
> > + clock-names = "ref_clk_parent", "ref_clk";
> Hi
> Is this correct (aren't child and parent clock swapped)?
> This will set MOUT_FSYS1_PHYCLK_SEL1 to be parent clock of
> CLK_SCLK_PHY_FSYS1_26M.

Looks like in one of my rebase it got swap, will correct it. Thanks for pointing out.

> I've tested this on Exynos7420 (which looks like can use the same clock driver as
> exynos7) and after adding some debug code (because currently we're not
> handling result of samsung_ufs_phy_clks_init) i got
>
> samsung-ufs-phy 15571800.ufs-phy: clk_set_parent result: -22
>
I will check if I overlooked this error.
> On vendor sources for this device, driver was setting CLK_SCLK_PHY_FSYS1_26M
> to be parent of MOUT_FSYS1_PHYCLK_SEL1, and then it did run without error.
>
> samsung-ufs-phy 15571800.ufs-phy: clk_set_parent result: 0
>
With this change, does linkup worked for you?

> Also looking at clk-exynos7 driver seems to confirm this.
>
> > + };
> > +
> > usbdrd_phy: phy@15500000 {
> > compatible = "samsung,exynos7-usbdrd-phy";
> > reg = <0x15500000 0x100>;




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