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Thu, 30 Oct 2025 01:38:30 -0700 (PDT) Received: from localhost ([2a01:e0a:3c5:5fb1:64bd:9043:d05:7012]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-477289a57fdsm26741525e9.7.2025.10.30.01.38.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Oct 2025 01:38:30 -0700 (PDT) From: Jerome Brunet To: Chuan Liu via B4 Relay Cc: Neil Armstrong , Michael Turquette , Stephen Boyd , Kevin Hilman , Martin Blumenstingl , chuan.liu@amlogic.com, linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, da@libre.computer Subject: Re: [PATCH v2 4/5] clk: amlogic: Optimize PLL enable timing In-Reply-To: <20251030-optimize_pll_driver-v2-4-37273f5b25ab@amlogic.com> (Chuan Liu via's message of "Thu, 30 Oct 2025 13:24:14 +0800") References: <20251030-optimize_pll_driver-v2-0-37273f5b25ab@amlogic.com> <20251030-optimize_pll_driver-v2-4-37273f5b25ab@amlogic.com> User-Agent: mu4e 1.12.9; emacs 30.1 Date: Thu, 30 Oct 2025 09:38:29 +0100 Message-ID: <1ja518zsvu.fsf@starbuckisacylon.baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251030_013832_993596_F461782A X-CRM114-Status: GOOD ( 23.01 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org T24gVGh1IDMwIE9jdCAyMDI1IGF0IDEzOjI0LCBDaHVhbiBMaXUgdmlhIEI0IFJlbGF5IDxkZXZu dWxsK2NodWFuLmxpdS5hbWxvZ2ljLmNvbUBrZXJuZWwub3JnPiB3cm90ZToKCj4gRnJvbTogQ2h1 YW4gTGl1IDxjaHVhbi5saXVAYW1sb2dpYy5jb20+Cj4KPiBsX2RldGVjdCBjb250cm9scyB0aGUg ZW5hYmxlbWVudCBvZiB0aGUgUExMIGxvY2sgZGV0ZWN0aW9uIG1vZHVsZS4KPiBJdCBzaG91bGQg cmVtYWluIGRpc2FibGVkIHdoaWxlIHRoZSBpbnRlcm5hbCBQTEwgY2lyY3VpdHMgYXJlCj4gcmVh Y2hpbmcgYSBzdGVhZHkgc3RhdGU7IG90aGVyd2lzZSwgdGhlIGxvY2sgc2lnbmFsIG1heSBiZSBm YWxzZWx5Cj4gdHJpZ2dlcmVkIGhpZ2guCj4KPiBCZWZvcmUgZW5hYmxpbmcgdGhlIGludGVybmFs IHBvd2VyIHN1cHBseSBvZiB0aGUgUExMLCBsX2RldGVjdCBzaG91bGQKPiBiZSBkaXNhYmxlZC4g QWZ0ZXIgdGhlIFBMTOKAmXMgaW50ZXJuYWwgY2lyY3VpdHMgaGF2ZSBzdGFiaWxpemVkLAo+IGxf ZGV0ZWN0IHNob3VsZCBiZSBlbmFibGVkIHRvIHByZXZlbnQgZmFsc2UgbG9jayBzaWduYWwgdHJp Z2dlcnMuCgpZb3UgdG8gcmVmb3JtYXQgdGhpcyBkZXNjcmlwdGlvbi4gSXQgZmVlbCB0aGF0IGJv dGggcGFyYWdyYXBoIGFyZSBzYXlpbmcKdGhlIHNhbWUgdGhpbmcuCgo+Cj4gQ3VycmVudGx5LCBv bmx5IEExIHN1cHBvcnRzIGJvdGggbF9kZXRlY3QgYW5kIGN1cnJlbnRfZW4sIHNvIHRoaXMKPiBw YXRjaCB3aWxsIG9ubHkgYWZmZWN0IEExLgo+Cj4gU2lnbmVkLW9mZi1ieTogQ2h1YW4gTGl1IDxj aHVhbi5saXVAYW1sb2dpYy5jb20+Cj4gLS0tCj4gIGRyaXZlcnMvY2xrL21lc29uL2Nsay1wbGwu YyB8IDI4ICsrKysrKysrKysrKysrKy0tLS0tLS0tLS0tLS0KPiAgMSBmaWxlIGNoYW5nZWQsIDE1 IGluc2VydGlvbnMoKyksIDEzIGRlbGV0aW9ucygtKQo+Cj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMv Y2xrL21lc29uL2Nsay1wbGwuYyBiL2RyaXZlcnMvY2xrL21lc29uL2Nsay1wbGwuYwo+IGluZGV4 IDZjNzk0YWRiOGNjZC4uYzZlZWJkZTFmNTE2IDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvY2xrL21l c29uL2Nsay1wbGwuYwo+ICsrKyBiL2RyaXZlcnMvY2xrL21lc29uL2Nsay1wbGwuYwo+IEBAIC0z ODMsMzYgKzM4MywzOCBAQCBzdGF0aWMgaW50IG1lc29uX2Nsa19wbGxfZW5hYmxlKHN0cnVjdCBj bGtfaHcgKmh3KQo+ICAJaWYgKE1FU09OX1BBUk1fQVBQTElDQUJMRSgmcGxsLT5yc3QpKQo+ICAJ CW1lc29uX3Bhcm1fd3JpdGUoY2xrLT5tYXAsICZwbGwtPnJzdCwgMSk7Cj4gIAo+ICsJLyogRGlz YWJsZSB0aGUgUExMIGxvY2stZGV0ZWN0IG1vZHVsZSAqLwo+ICsJaWYgKE1FU09OX1BBUk1fQVBQ TElDQUJMRSgmcGxsLT5sX2RldGVjdCkpCj4gKwkJbWVzb25fcGFybV93cml0ZShjbGstPm1hcCwg JnBsbC0+bF9kZXRlY3QsIDEpOwo+ICsKPiAgCS8qIEVuYWJsZSB0aGUgcGxsICovCj4gIAltZXNv bl9wYXJtX3dyaXRlKGNsay0+bWFwLCAmcGxsLT5lbiwgMSk7Cj4gIAkvKiBXYWl0IGZvciBCYW5k Z2FwIGFuZCBMRE8gdG8gcG93ZXIgdXAgYW5kIHN0YWJpbGl6ZSAqLwo+ICAJdWRlbGF5KDIwKTsK PiAgCj4gLQkvKiBUYWtlIHRoZSBwbGwgb3V0IHJlc2V0ICovCj4gLQlpZiAoTUVTT05fUEFSTV9B UFBMSUNBQkxFKCZwbGwtPnJzdCkpCj4gLQkJbWVzb25fcGFybV93cml0ZShjbGstPm1hcCwgJnBs bC0+cnN0LCAwKTsKCldoeSBpcyB0aGUgcmVzZXQgbW92aW5nIGFyb3VuZCA/IG5vdGhpbmcgaXMg c2FpZCBpbiB0aGUgZGVzY3JpcHRpb24gYWJvdXQKdGhhdAoKPiAtCj4gLQkvKiBXYWl0IGZvciBQ TEwgbG9vcCBzdGFiaWxpemF0aW9uICovCj4gLQl1ZGVsYXkoMjApOwo+IC0KPiAgCS8qCj4gIAkg KiBDb21wYXJlZCB3aXRoIHRoZSBwcmV2aW91cyBTb0NzLCBzZWxmLWFkYXB0aW9uIGN1cnJlbnQg bW9kdWxlCj4gIAkgKiBpcyBuZXdseSBhZGRlZCBmb3IgQTEsIGtlZXAgdGhlIG5ldyBwb3dlci1v biBzZXF1ZW5jZSB0byBlbmFibGUgdGhlCj4gIAkgKiBQTEwuIFRoZSBzZXF1ZW5jZSBpczoKPiAt CSAqIDEuIGVuYWJsZSB0aGUgcGxsLCBkZWxheSBmb3IgMTB1cwo+ICsJICogMS4gZW5hYmxlIHRo ZSBwbGwsIGRlbGF5IGZvciAyMHVzCj4gIAkgKiAyLiBlbmFibGUgdGhlIHBsbCBzZWxmLWFkYXB0 aW9uIGN1cnJlbnQgbW9kdWxlLCBkZWxheSBmb3IgNDB1cwo+ICAJICogMy4gZW5hYmxlIHRoZSBs b2NrIGRldGVjdCBtb2R1bGUKPiAgCSAqLwo+ICAJaWYgKE1FU09OX1BBUk1fQVBQTElDQUJMRSgm cGxsLT5jdXJyZW50X2VuKSkgewo+IC0JCXVkZWxheSgxMCk7Cj4gIAkJbWVzb25fcGFybV93cml0 ZShjbGstPm1hcCwgJnBsbC0+Y3VycmVudF9lbiwgMSk7Cj4gLQkJdWRlbGF5KDQwKTsKPiArCQl1 ZGVsYXkoMjApOwo+ICAJfQo+ICAKPiAtCWlmIChNRVNPTl9QQVJNX0FQUExJQ0FCTEUoJnBsbC0+ bF9kZXRlY3QpKSB7Cj4gLQkJbWVzb25fcGFybV93cml0ZShjbGstPm1hcCwgJnBsbC0+bF9kZXRl Y3QsIDEpOwo+ICsJLyogVGFrZSB0aGUgcGxsIG91dCByZXNldCAqLwo+ICsJaWYgKE1FU09OX1BB Uk1fQVBQTElDQUJMRSgmcGxsLT5yc3QpKQo+ICsJCW1lc29uX3Bhcm1fd3JpdGUoY2xrLT5tYXAs ICZwbGwtPnJzdCwgMCk7Cj4gKwo+ICsJLyogV2FpdCBmb3IgUExMIGxvb3Agc3RhYmlsaXphdGlv biAqLwo+ICsJdWRlbGF5KDIwKTsKPiArCj4gKwkvKiBFbmFibGUgdGhlIGxvY2stZGV0ZWN0IG1v ZHVsZSAqLwo+ICsJaWYgKE1FU09OX1BBUk1fQVBQTElDQUJMRSgmcGxsLT5sX2RldGVjdCkpCj4g IAkJbWVzb25fcGFybV93cml0ZShjbGstPm1hcCwgJnBsbC0+bF9kZXRlY3QsIDApOwo+IC0JfQo+ ICAKPiAgCWlmIChtZXNvbl9jbGtfcGxsX3dhaXRfbG9jayhodykpIHsKPiAgCQkvKiBkaXNhYmxl IFBMTCB3aGVuIFBMTCBsb2NrIGZhaWxlZC4gKi8KCi0tIApKZXJvbWUKCl9fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFtbG9naWMgbWFpbGluZyBs aXN0CmxpbnV4LWFtbG9naWNAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFk ZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFtbG9naWMK