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From: Alexander Dahl <ada@thorsis.com>
To: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Ryan Wanner <ryan.wanner@microchip.com>,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>
Subject: [PATCH v4 14/16] ARM: dts: microchip: sam9x60: Add OTPC node
Date: Thu,  5 Nov 2026 12:06:50 +0100	[thread overview]
Message-ID: <20261105110715.2486432-15-ada@thorsis.com> (raw)
In-Reply-To: <20261105110715.2486432-1-ada@thorsis.com>

The One-Time Programmable (OTP) Memory Controller (OTPC) is the secure
interface between the system and the OTP memory.  It also features the
Unique Product ID (UID) registers containing a unique serial number.

See datasheet (DS60001579G) sections "7. Memories" and "23. OTP Memory
Controller (OTPC)" for reference.

Signed-off-by: Alexander Dahl <ada@thorsis.com>
---

Notes:
    v4:
    - Dropped new microchip,sam9x60-otpc compatible,
      use microchip,sama7g5-otpc instead
    
    v3:
    - Removed needless header include
    - Removed clock-names, not part of bindings anymore, and not used by driver
    
    v2:
    - squashed with patch adding the clock properties

 arch/arm/boot/dts/microchip/sam9x60.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/sam9x60.dtsi b/arch/arm/boot/dts/microchip/sam9x60.dtsi
index 4b777c61c1e09..996b13300ca06 100644
--- a/arch/arm/boot/dts/microchip/sam9x60.dtsi
+++ b/arch/arm/boot/dts/microchip/sam9x60.dtsi
@@ -155,6 +155,14 @@ sdmmc1: sdio-host@90000000 {
 			status = "disabled";
 		};
 
+		otpc: efuse@eff00000 {
+			compatible = "microchip,sama7g5-otpc", "syscon";
+			reg = <0xeff00000 0xec>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			clocks = <&pmc PMC_TYPE_CORE SAM9X60_PMC_MAIN_RC>, <&pmc PMC_TYPE_PERIPHERAL 46>;
+		};
+
 		apb {
 			compatible = "simple-bus";
 			#address-cells = <1>;
-- 
2.47.3


  parent reply	other threads:[~2026-11-05 13:11 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-05 11:06 [PATCH v4 00/16] Microchip OTPC driver on SAM9X60 exposing UIDxR as additional nvmem device Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 01/16] MAINTAINERS: Add sam9/sama to (AT91) SoC support Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 02/16] dt-bindings: clock: at91: Split up per SoC partially Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 03/16] dt-bindings: clock: at91: Allow referencing main rc oscillator in DT Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 04/16] clk: at91: Use new per SoC PMC clock index definitions Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 05/16] clk: at91: Allow enabling main_rc_osc through DT Alexander Dahl
2026-11-06  2:39   ` kernel test robot
2026-11-05 11:06 ` [PATCH v4 06/16] clk: at91: Add peripheral clock id for OTPC Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 07/16] dt-bindings: nvmem: microchip-otpc: Add required clocks Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 08/16] nvmem: microchip-otpc: Avoid reading a write-only register Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 09/16] nvmem: microchip-otpc: Fix swapped 'sleep' and 'timeout' parameters Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 10/16] nvmem: microchip-otpc: Enable necessary clocks Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 11/16] nvmem: microchip-otpc: Expose UID registers as 2nd nvmem device Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 12/16] ARM: dts: microchip: Use new per SoC PMC bindings Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 13/16] ARM: dts: microchip: sama7g5: Add OTPC clocks Alexander Dahl
2026-11-05 11:06 ` Alexander Dahl [this message]
2026-11-05 11:06 ` [PATCH v4 15/16] ARM: dts: microchip: sam9x60_curiosity: Enable OTP Controller Alexander Dahl
2026-11-05 11:06 ` [PATCH v4 16/16] dt-bindings: clock: at91: Remove old PMC definitions Alexander Dahl

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