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Message-id: <561B49D0.2040305@samsung.com> Date: Mon, 12 Oct 2015 14:49:04 +0900 From: Krzysztof Kozlowski <k.kozlowski@...sung.com> To: Anand Moon <linux.amoon@...il.com>, Kukjin Kim <kgene@...nel.org>, Javier Martinez Canillas <javier@....samsung.com>, Lukasz Majewski <l.majewski@...sung.com>, Jaehoon Chung <jh80.chung@...sung.com> Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 2/3] ARM: dts: use vmmc-supply of emmc/sd for exynos5422-odroidxu3 On 12.10.2015 13:42, Krzysztof Kozlowski wrote: > On 12.10.2015 00:46, Anand Moon wrote: >> Added support for vmmc/vqmmc-supply for emmc/sd cards. >> Fixed the min values for regulator ldo13_reg (VDDQ_MMC2). > > I can't see the description of a problem which is fixed. If you fix > something, then please describe what is wrong. > >> Added ramp-delay for LDO9(VDD33_USB3_0). >> Added ramp-delay for LDO13(VDDQ_MMC2). >> Added ramp-delay for LDO15(ETH_P3V3). >> >> Signed-off-by: Anand Moon <linux.amoon@...il.com> >> >> --- >> Changes based on git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung.git v4.4-next/dt-samsung branch >> >> Note: >> Changes need for support of UHS-I highspeed cards. >> changes for vqmmc-supply for emmc is not supported. >> >> [ 1.831136] vdd_ldo9: ramp_delay not set >> [ 1.843049] vdd_ldo13: ramp_delay not set >> [ 1.850975] vdd_ldo15: ramp_delay not set >> [ 1.862816] vdd_sd: ramp_delay not set >> --- >> arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 8 +++++++- >> 1 file changed, 7 insertions(+), 1 deletion(-) >> >> diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi >> index 26decbd..58c06d3 100644 >> --- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi >> +++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi >> @@ -157,6 +157,7 @@ >> regulator-min-microvolt = <3000000>; >> regulator-max-microvolt = <3000000>; >> regulator-always-on; >> + regulator-ramp-delay = <12000>; >> }; >> >> ldo10_reg: LDO10 { >> @@ -182,9 +183,10 @@ >> >> ldo13_reg: LDO13 { >> regulator-name = "vdd_ldo13"; >> - regulator-min-microvolt = <2800000>; >> + regulator-min-microvolt = <1800000>; >> regulator-max-microvolt = <2800000>; >> regulator-always-on; >> + regulator-ramp-delay = <12000>; >> }; >> >> ldo15_reg: LDO15 { >> @@ -213,6 +215,7 @@ >> regulator-min-microvolt = <2800000>; >> regulator-max-microvolt = <2800000>; >> regulator-always-on; >> + regulator-ramp-delay = <12000>; > > Where did you get this value from? It looks wrong... My datasheet does > not have 12000 uV/uS. Anand, We have actually been here: http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/351601.html That time you used 8000. I asked the same question - how did you figure out the exact value. Now we have the same question - why 12000? It is completely fine to make a mistake (I do a lot of them) but please try not to make the same mistake again. BR, Krzysztof > >> }; >> >> ldo24_reg: LDO24 { >> @@ -338,6 +341,7 @@ >> samsung,dw-mshc-ddr-timing = <0 2>; >> samsung,dw-mshc-hs400-timing = <0 2>; >> samsung,read-strobe-delay = <90>; >> + vmmc-supply = <&ldo3_reg>; >> pinctrl-names = "default"; >> pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8 &sd0_cd &sd0_rclk>; >> bus-width = <8>; >> @@ -352,6 +356,8 @@ >> samsung,dw-mshc-ciu-div = <3>; >> samsung,dw-mshc-sdr-timing = <0 4>; >> samsung,dw-mshc-ddr-timing = <0 2>; >> + vmmc-supply = <&ldo19_reg>; >> + vqmmc-supply = <&ldo13_reg>; > > It looks wrong. LDO13 is used in one place as VQMMC and in other as > VMMC. How did you figure out which regulator supplies which power domain? > > Best regards, > Krzysztof > >> cd-gpios = <&gpc2 2 GPIO_ACTIVE_HIGH>; >> cd-inverted; >> pinctrl-names = "default"; >> > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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