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Date:   Sun, 22 Nov 2020 10:55:54 +0100
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     mturquette@...libre.com
Cc:     sboyd@...nel.org, robh+dt@...nel.org, john@...ozen.org,
        tsbogend@...ha.franken.de, gregkh@...uxfoundation.org,
        gch981213@...il.com, hackpascal@...il.com,
        linux-clk@...r.kernel.org, evicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        devel@...verdev.osuosl.org, neil@...wn.name
Subject: [PATCH v4 4/6] staging: mt7621-dts: make use of new 'mt7621-clk'

Clocks for SoC mt7621 have been properly integrated so there is
no need to declare fixed clocks at all in the device tree. Remove
all of them, add new device tree nodes for mt7621-clk and update
the rest of the nodes to use them.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@...il.com>
---
 drivers/staging/mt7621-dts/gbpc1.dts   | 11 ----
 drivers/staging/mt7621-dts/mt7621.dtsi | 75 ++++++++++++--------------
 2 files changed, 35 insertions(+), 51 deletions(-)

diff --git a/drivers/staging/mt7621-dts/gbpc1.dts b/drivers/staging/mt7621-dts/gbpc1.dts
index a7c0d3115d72..7716d0efe524 100644
--- a/drivers/staging/mt7621-dts/gbpc1.dts
+++ b/drivers/staging/mt7621-dts/gbpc1.dts
@@ -100,17 +100,6 @@ partition@...00 {
 	};
 };
 
-&sysclock {
-			compatible = "fixed-clock";
-			/* This is normally 1/4 of cpuclock */
-			clock-frequency = <225000000>;
-};
-
-&cpuclock {
-			compatible = "fixed-clock";
-			clock-frequency = <900000000>;
-};
-
 &pcie {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie_pins>;
diff --git a/drivers/staging/mt7621-dts/mt7621.dtsi b/drivers/staging/mt7621-dts/mt7621.dtsi
index 82aa93634eda..35cfda8f6faf 100644
--- a/drivers/staging/mt7621-dts/mt7621.dtsi
+++ b/drivers/staging/mt7621-dts/mt7621.dtsi
@@ -1,5 +1,6 @@
 #include <dt-bindings/interrupt-controller/mips-gic.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/clock/mt7621-clk.h>
 
 / {
 	#address-cells = <1>;
@@ -27,27 +28,6 @@ aliases {
 		serial0 = &uartlite;
 	};
 
-	cpuclock: cpuclock@0 {
-		#clock-cells = <0>;
-		compatible = "fixed-clock";
-
-		/* FIXME: there should be way to detect this */
-		clock-frequency = <880000000>;
-	};
-
-	sysclock: sysclock@0 {
-		#clock-cells = <0>;
-		compatible = "fixed-clock";
-
-		/* This is normally 1/4 of cpuclock */
-		clock-frequency = <220000000>;
-	};
-
-	mmc_clock: mmc_clock@0 {
-		#clock-cells = <0>;
-		compatible = "fixed-clock";
-		clock-frequency = <48000000>;
-	};
 
 	mmc_fixed_3v3: fixedregulator@0 {
 		compatible = "regulator-fixed";
@@ -76,8 +56,16 @@ palmbus: palmbus@...00000 {
 		#size-cells = <1>;
 
 		sysc: sysc@0 {
-			compatible = "mtk,mt7621-sysc";
+			compatible = "mtk,mt7621-sysc", "syscon";
 			reg = <0x0 0x100>;
+
+			pll: pll {
+				compatible = "mediatek,mt7621-clk";
+				#clock-cells = <1>;
+				clock-output-names = "xtal", "cpu", "bus",
+						     "50m", "125m", "150m",
+						     "250m", "270m";
+			};
 		};
 
 		wdt: wdt@100 {
@@ -100,8 +88,8 @@ i2c: i2c@900 {
 			compatible = "mediatek,mt7621-i2c";
 			reg = <0x900 0x100>;
 
-			clocks = <&sysclock>;
-
+			clocks = <&pll MT7621_CLK_I2C>;
+			clock-names = "i2c";
 			resets = <&rstctrl 16>;
 			reset-names = "i2c";
 
@@ -118,8 +106,8 @@ i2s: i2s@a00 {
 			compatible = "mediatek,mt7621-i2s";
 			reg = <0xa00 0x100>;
 
-			clocks = <&sysclock>;
-
+			clocks = <&pll MT7621_CLK_I2S>;
+			clock-names = "i2s";
 			resets = <&rstctrl 17>;
 			reset-names = "i2s";
 
@@ -155,8 +143,8 @@ uartlite: uartlite@c00 {
 			compatible = "ns16550a";
 			reg = <0xc00 0x100>;
 
-			clocks = <&sysclock>;
-			clock-frequency = <50000000>;
+			clocks = <&pll MT7621_CLK_UART1>;
+			clock-names = "uart1";
 
 			interrupt-parent = <&gic>;
 			interrupts = <GIC_SHARED 26 IRQ_TYPE_LEVEL_HIGH>;
@@ -172,7 +160,8 @@ spi0: spi@b00 {
 			compatible = "ralink,mt7621-spi";
 			reg = <0xb00 0x100>;
 
-			clocks = <&sysclock>;
+			clocks = <&pll MT7621_CLK_SPI>;
+			clock-names = "spi";
 
 			resets = <&rstctrl 18>;
 			reset-names = "spi";
@@ -188,6 +177,8 @@ gdma: gdma@...0 {
 			compatible = "ralink,rt3883-gdma";
 			reg = <0x2800 0x800>;
 
+			clocks = <&pll MT7621_CLK_GDMA>;
+			clock-names = "gdma";
 			resets = <&rstctrl 14>;
 			reset-names = "dma";
 
@@ -205,6 +196,8 @@ hsdma: hsdma@...0 {
 			compatible = "mediatek,mt7621-hsdma";
 			reg = <0x7000 0x1000>;
 
+			clocks = <&pll MT7621_CLK_HSDMA>;
+			clock-names = "hsdma";
 			resets = <&rstctrl 5>;
 			reset-names = "hsdma";
 
@@ -315,11 +308,6 @@ rstctrl: rstctrl {
 		#reset-cells = <1>;
 	};
 
-	clkctrl: clkctrl {
-		compatible = "ralink,rt2880-clock";
-		#clock-cells = <1>;
-	};
-
 	sdhci: sdhci@...30000 {
 		status = "disabled";
 
@@ -338,7 +326,8 @@ sdhci: sdhci@...30000 {
 		pinctrl-0 = <&sdhci_pins>;
 		pinctrl-1 = <&sdhci_pins>;
 
-		clocks = <&mmc_clock &mmc_clock>;
+		clocks = <&pll MT7621_CLK_SHXC>,
+			 <&pll MT7621_CLK_50M>;
 		clock-names = "source", "hclk";
 
 		interrupt-parent = <&gic>;
@@ -353,7 +342,7 @@ xhci: xhci@...C0000 {
 		       0x1e1d0700 0x0100>;
 		reg-names = "mac", "ippc";
 
-		clocks = <&sysclock>;
+		clocks = <&pll MT7621_CLK_XTAL>;
 		clock-names = "sys_ck";
 
 		interrupt-parent = <&gic>;
@@ -372,7 +361,7 @@ gic: interrupt-controller@...c0000 {
 		timer {
 			compatible = "mti,gic-timer";
 			interrupts = <GIC_LOCAL 1 IRQ_TYPE_NONE>;
-			clocks = <&cpuclock>;
+			clocks = <&pll MT7621_CLK_CPU>;
 		};
 	};
 
@@ -385,6 +374,9 @@ nand: nand@...03000 {
 			0x1e003800 0x800>;
 		#address-cells = <1>;
 		#size-cells = <1>;
+
+		clocks = <&pll MT7621_CLK_NAND>;
+		clock-names = "nand";
 	};
 
 	ethsys: syscon@...00000 {
@@ -398,8 +390,9 @@ ethernet: ethernet@...00000 {
 		compatible = "mediatek,mt7621-eth";
 		reg = <0x1e100000 0x10000>;
 
-		clocks = <&sysclock>;
-		clock-names = "ethif";
+		clocks = <&pll MT7621_CLK_FE>,
+			 <&pll MT7621_CLK_ETH>;
+		clock-names = "fe", "ethif";
 
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -532,7 +525,9 @@ GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH
 
 		resets = <&rstctrl 24 &rstctrl 25 &rstctrl 26>;
 		reset-names = "pcie0", "pcie1", "pcie2";
-		clocks = <&clkctrl 24 &clkctrl 25 &clkctrl 26>;
+		clocks = <&pll MT7621_CLK_PCIE0>,
+			 <&pll MT7621_CLK_PCIE1>,
+			 <&pll MT7621_CLK_PCIE2>;
 		clock-names = "pcie0", "pcie1", "pcie2";
 		phys = <&pcie0_phy 1>, <&pcie2_phy 0>;
 		phy-names = "pcie-phy0", "pcie-phy2";
-- 
2.25.1

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