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[67.187.90.124]) by smtp.gmail.com with ESMTPSA id 75sm9115607qta.68.2021.01.26.10.02.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 26 Jan 2021 10:02:41 -0800 (PST) Subject: Re: [PATCH] cmd_dtc: Enable generation of device tree symbols To: Masahiro Yamada , =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= , Frank Rowand Cc: Michal Marek , Linux Kbuild mailing list , Linux Kernel Mailing List , linux-arm-kernel , cyril@debamax.com, Arnd Bergmann , Maxime Ripard , DTML References: <20210125105757.661240-1-uwe@kleine-koenig.org> From: Frank Rowand Message-ID: <75be8210-ff70-51cb-11f1-bd012ac7fb94@gmail.com> Date: Tue, 26 Jan 2021 12:02:40 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org +frank On 1/25/21 3:53 PM, Masahiro Yamada wrote: > On Mon, Jan 25, 2021 at 8:07 PM Uwe Kleine-König wrote: >> >> Adding the -@ switch to dtc results in the binary devicetrees containing >> a list of symbolic references and their paths. This is necessary to >> apply device tree overlays e.g. on Raspberry Pi as described on >> https://www.raspberrypi.org/documentation/configuration/device-tree.md. >> >> Obviously the downside of this change is an increas of the size of the >> generated dtbs, for an arm out-of-tree build (multi_v7_defconfig): >> >> $ du -s arch/arm/boot/dts* >> 101380 arch/arm/boot/dts-pre >> 114308 arch/arm/boot/dts-post >> >> so this is in average an increase of 12.8% in size. >> >> Signed-off-by: Uwe Kleine-König > > > (CCing DT ML.) > > > https://www.spinics.net/lists/linux-kbuild/msg27904.html > > See Rob's comment: > > "We've already rejected doing that. Turning on '-@' can grow the dtb > size by a significant amount which could be problematic for some > boards." > > > > > > > > >> --- >> scripts/Makefile.lib | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib >> index 213677a5ed33..0683a5808f7f 100644 >> --- a/scripts/Makefile.lib >> +++ b/scripts/Makefile.lib >> @@ -319,7 +319,7 @@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE >> >> quiet_cmd_dtc = DTC $@ >> cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ >> - $(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \ >> + $(DTC) -@ -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \ >> $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \ >> -d $(depfile).dtc.tmp $(dtc-tmp) ; \ >> cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) >> -- >> 2.29.2 >> > > > -- > Best Regards > > Masahiro Yamada > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.2 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD711C433E0 for ; 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[67.187.90.124]) by smtp.gmail.com with ESMTPSA id 75sm9115607qta.68.2021.01.26.10.02.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 26 Jan 2021 10:02:41 -0800 (PST) Subject: Re: [PATCH] cmd_dtc: Enable generation of device tree symbols To: Masahiro Yamada , =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= , Frank Rowand References: <20210125105757.661240-1-uwe@kleine-koenig.org> From: Frank Rowand Message-ID: <75be8210-ff70-51cb-11f1-bd012ac7fb94@gmail.com> Date: Tue, 26 Jan 2021 12:02:40 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210126_130243_701825_DA15F791 X-CRM114-Status: GOOD ( 22.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: DTML , Michal Marek , Arnd Bergmann , Linux Kbuild mailing list , Linux Kernel Mailing List , Maxime Ripard , cyril@debamax.com, linux-arm-kernel Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org K2ZyYW5rCgpPbiAxLzI1LzIxIDM6NTMgUE0sIE1hc2FoaXJvIFlhbWFkYSB3cm90ZToKPiBPbiBN b24sIEphbiAyNSwgMjAyMSBhdCA4OjA3IFBNIFV3ZSBLbGVpbmUtS8O2bmlnIDx1d2VAa2xlaW5l LWtvZW5pZy5vcmc+IHdyb3RlOgo+Pgo+PiBBZGRpbmcgdGhlIC1AIHN3aXRjaCB0byBkdGMgcmVz dWx0cyBpbiB0aGUgYmluYXJ5IGRldmljZXRyZWVzIGNvbnRhaW5pbmcKPj4gYSBsaXN0IG9mIHN5 bWJvbGljIHJlZmVyZW5jZXMgYW5kIHRoZWlyIHBhdGhzLiBUaGlzIGlzIG5lY2Vzc2FyeSB0bwo+ PiBhcHBseSBkZXZpY2UgdHJlZSBvdmVybGF5cyBlLmcuIG9uIFJhc3BiZXJyeSBQaSBhcyBkZXNj cmliZWQgb24KPj4gaHR0cHM6Ly93d3cucmFzcGJlcnJ5cGkub3JnL2RvY3VtZW50YXRpb24vY29u ZmlndXJhdGlvbi9kZXZpY2UtdHJlZS5tZC4KPj4KPj4gT2J2aW91c2x5IHRoZSBkb3duc2lkZSBv ZiB0aGlzIGNoYW5nZSBpcyBhbiBpbmNyZWFzIG9mIHRoZSBzaXplIG9mIHRoZQo+PiBnZW5lcmF0 ZWQgZHRicywgZm9yIGFuIGFybSBvdXQtb2YtdHJlZSBidWlsZCAobXVsdGlfdjdfZGVmY29uZmln KToKPj4KPj4gICAgICAgICAkIGR1IC1zIGFyY2gvYXJtL2Jvb3QvZHRzKgo+PiAgICAgICAgIDEw MTM4MCAgYXJjaC9hcm0vYm9vdC9kdHMtcHJlCj4+ICAgICAgICAgMTE0MzA4ICBhcmNoL2FybS9i b290L2R0cy1wb3N0Cj4+Cj4+IHNvIHRoaXMgaXMgaW4gYXZlcmFnZSBhbiBpbmNyZWFzZSBvZiAx Mi44JSBpbiBzaXplLgo+Pgo+PiBTaWduZWQtb2ZmLWJ5OiBVd2UgS2xlaW5lLUvDtm5pZyA8dXdl QGtsZWluZS1rb2VuaWcub3JnPgo+IAo+IAo+IChDQ2luZyBEVCBNTC4pCj4gCj4gCj4gaHR0cHM6 Ly93d3cuc3Bpbmljcy5uZXQvbGlzdHMvbGludXgta2J1aWxkL21zZzI3OTA0Lmh0bWwKPiAKPiBT ZWUgUm9iJ3MgY29tbWVudDoKPiAKPiAiV2UndmUgYWxyZWFkeSByZWplY3RlZCBkb2luZyB0aGF0 LiBUdXJuaW5nIG9uICctQCcgY2FuIGdyb3cgdGhlIGR0Ygo+IHNpemUgYnkgYSBzaWduaWZpY2Fu dCBhbW91bnQgd2hpY2ggY291bGQgYmUgcHJvYmxlbWF0aWMgZm9yIHNvbWUKPiBib2FyZHMuIgo+ IAo+IAo+IAo+IAo+IAo+IAo+IAo+IAo+PiAtLS0KPj4gIHNjcmlwdHMvTWFrZWZpbGUubGliIHwg MiArLQo+PiAgMSBmaWxlIGNoYW5nZWQsIDEgaW5zZXJ0aW9uKCspLCAxIGRlbGV0aW9uKC0pCj4+ Cj4+IGRpZmYgLS1naXQgYS9zY3JpcHRzL01ha2VmaWxlLmxpYiBiL3NjcmlwdHMvTWFrZWZpbGUu bGliCj4+IGluZGV4IDIxMzY3N2E1ZWQzMy4uMDY4M2E1ODA4ZjdmIDEwMDY0NAo+PiAtLS0gYS9z Y3JpcHRzL01ha2VmaWxlLmxpYgo+PiArKysgYi9zY3JpcHRzL01ha2VmaWxlLmxpYgo+PiBAQCAt MzE5LDcgKzMxOSw3IEBAICQob2JqKS8lLmR0Yi5TOiAkKG9iaikvJS5kdGIgRk9SQ0UKPj4KPj4g IHF1aWV0X2NtZF9kdGMgPSBEVEMgICAgICRACj4+ICBjbWRfZHRjID0gJChIT1NUQ0MpIC1FICQo ZHRjX2NwcF9mbGFncykgLXggYXNzZW1ibGVyLXdpdGgtY3BwIC1vICQoZHRjLXRtcCkgJDwgOyBc Cj4+IC0gICAgICAgJChEVEMpIC1PICQocGF0c3Vic3QgLiUsJSwkKHN1ZmZpeCAkQCkpIC1vICRA IC1iIDAgXAo+PiArICAgICAgICQoRFRDKSAtQCAtTyAkKHBhdHN1YnN0IC4lLCUsJChzdWZmaXgg JEApKSAtbyAkQCAtYiAwIFwKPj4gICAgICAgICAgICAgICAgICQoYWRkcHJlZml4IC1pLCQoZGly ICQ8KSAkKERUQ19JTkNMVURFKSkgJChEVENfRkxBR1MpIFwKPj4gICAgICAgICAgICAgICAgIC1k ICQoZGVwZmlsZSkuZHRjLnRtcCAkKGR0Yy10bXApIDsgXAo+PiAgICAgICAgIGNhdCAkKGRlcGZp bGUpLnByZS50bXAgJChkZXBmaWxlKS5kdGMudG1wID4gJChkZXBmaWxlKQo+PiAtLQo+PiAyLjI5 LjIKPj4KPiAKPiAKPiAtLQo+IEJlc3QgUmVnYXJkcwo+IAo+IE1hc2FoaXJvIFlhbWFkYQo+IAoK Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFy bS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9y ZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1r ZXJuZWwK