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Sun, 5 Jul 2020 07:29:36 +0000 (GMT) From: Alim Akhtar To: krzk@kernel.org Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, Alim Akhtar Subject: [PATCH v1 1/2] arm64: dts: exynos: Fix silent hang after boot Date: Sun, 5 Jul 2020 12:39:17 +0530 Message-Id: <20200705070918.63531-1-alim.akhtar@samsung.com> X-Mailer: git-send-email 2.17.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrGIsWRmVeSWpSXmKPExsWy7bCmum5SI2O8wYlX3BYP5m1js5h/5Byr xfnzG9gtNj2+xmpxedccNosZ5/cxWbTuPcLuwO6xaVUnm8fmJfUefVtWMXp83iQXwBLFZZOS mpNZllqkb5fAlbH38iK2gkaOigX725kaGO+xdTFyckgImEisftIIZHNxCAnsZpTYtHoeK4Tz iVHiad8zFgjnG6PEubmfWWBa/i5pZodI7GWU+H+6HaqlhUli3/rvzCBVbALaEnenb2ECsUUE hCXuLV0O1sEscIRRouH8C7CEsICbxOl508AuYRFQlXi9/RcriM0rYCPx6+gDVoh18hKrNxxg BmmWEFjELvH42AwmiISLxNENaxkhbGGJV8e3sEPYUhKf3+0FGsoBZGdL9OwyhgjXSCyddwzq BXuJA1fmsICUMAtoSqzfpQ8SZhbgk+j9/YQJopNXoqNNCKJaVaL53VWoTmmJid3dUJd5SHw/ eAjsACGBWInezSvYJjDKzEIYuoCRcRWjZGpBcW56arFpgWFearlecWJucWleul5yfu4mRnBU a3nuYLz74IPeIUYmDsZDjBIczEoivL3ajPFCvCmJlVWpRfnxRaU5qcWHGKU5WJTEeZV+nIkT EkhPLEnNTk0tSC2CyTJxcEo1MHELfpl6JkKxL0rl6t+1ezZkzv5rcOC39KuTrw5PyrS/tKbN wkbRTa5Kd7LnezbxZ+eKnBxddI6+7a3c6C4vG+/17752jap7xj5p7tX367W0FNdvz4kWydpo smfPrf+H/+4vPOjxtaXC4vLLA2f9L61ZY1FrnVYx5/Lq0zxn3/fXKIu/OdvEMU9j/8Kt+Wek tD3qPnFc5byQNNHjz4qj555w3fUW9k4VL33+j71JJGGDRGD+JqbeXx9UL2e/OLjbsmma8gPf 3hw1IX7n9EORU+s1Vuev5BBjnjBHYPPmGxVWC6bsMX/160Dj8gvPl9/3uDHveceu1WlTK+zn uHt1pQlf3CM4R1R03y+Tqvmv/65WYinOSDTUYi4qTgQA1cBYCFkDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrFJMWRmVeSWpSXmKPExsWy7bCSnG5iI2O8wZPpihYP5m1js5h/5Byr xfnzG9gtNj2+xmpxedccNosZ5/cxWbTuPcLuwO6xaVUnm8fmJfUefVtWMXp83iQXwBLFZZOS mpNZllqkb5fAlbH38iK2gkaOigX725kaGO+xdTFyckgImEj8XdLM3sXIxSEksJtRYtOKPhaI hLTE9Y0T2CFsYYmV/55DFTUxSUy7dR4swSagLXF3+hYmEFsEqOje0uVgRcwCpxgl+rdvBisS FnCTOD1vGtg6FgFVidfbf7GC2LwCNhK/jj5ghdggL7F6wwHmCYw8CxgZVjFKphYU56bnFhsW GOallusVJ+YWl+al6yXn525iBAePluYOxu2rPugdYmTiYDzEKMHBrCTC26vNGC/Em5JYWZVa lB9fVJqTWnyIUZqDRUmc90bhwjghgfTEktTs1NSC1CKYLBMHp1QDk3aqsVX9qQsRPXlrNs35 cGVe/mR3n+kp+Tn8c+P12JN9/3f2hWvocszN/s9jY5LAlrnbYtOqT6t8+335ui1f3+5/yzb5 5zIZx9l1GrW8GQf1t02be+9KuvKGRM9dXDvznh6x3Vbw/0OFVrfa2U2JR9jOCE2r8vt0j8tz 8hvftL8GM0x/vN3ra75GabvNYYnmNxypxy5zrLh6p22h2Y6iA8X6q668n+diZCrKIL9uZtWJ 69qtDoF1MXlbbD75Vli+sfLrqdSPfH+rzyb5dWrF8gsu/X3O1xbctXy+6nturfOXt7v2H7n4 aF1Durxk//OLRrt3T9pZmvemIiNdN1pLPmftgaUq3t6SAvkL/+z4qcRSnJFoqMVcVJwIANkS tHiNAgAA X-CMS-MailID: 20200705072937epcas5p1b6c9a25770451bcb9d8bc5b14b8a8b53 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P X-CMS-RootMailID: 20200705072937epcas5p1b6c9a25770451bcb9d8bc5b14b8a8b53 References: Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Once regulators are disabled after kernel boot, on espresso board silent hang observed because of LDO7 being disabled. LDO7 actually provide power to CPU cores and non-cpu blocks circuitries. Keep this regulator always-on to fix this hang. Fixes: 9589f7721e16 ("arm64: dts: Add S2MPS15 PMIC node on exynos7-espresso") Signed-off-by: Alim Akhtar --- - arch/arm64/boot/dts/exynos/exynos7-espresso.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts index 790f12ca8981..bb86950032d3 100644 --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts @@ -157,6 +157,7 @@ regulator-min-microvolt = <700000>; regulator-max-microvolt = <1150000>; regulator-enable-ramp-delay = <125>; + regulator-always-on; }; ldo8_reg: LDO8 { base-commit: 9e50b94b3eb0d859a2586b5a40d7fd6e5afd9210 -- 2.17.1