[PATCH v4 0/4] device_type/compatible cleanups

[PATCH v4 0/4] device_type/compatible cleanups

[Anton Vorontsov]

Hi all,

The fourth version follows...

Changes since v3:
- Thanks to reviewers, few glitches found and fixed;
- New conversion: device_type = "qeic" to compatible = "fsl,qe-ic";
- Documentation updated.

Changes since v2:
- SPI conversion fixed and actually tested on MPC8323E-RDB to not
  break anything;
- Few more users of device_type = "qe" converted to
  compatible = "fsl,qe";
- Got Ack on SPI part from David Brownell.

Changes since v1:
- Device tree lookup changes should be backward compatible with
  older dtbs;
- Few of_put_node() cleanups;
- cell-index property added to spi nodes;
- cpm-muram{,-data} added as an addition to qe-muram{,-data}.


Thanks,

-- 
Anton Vorontsov
email: cbou@mail.ru
backup email: ya-cbou@yandex.ru
irc://irc.freenode.net/bd2

[PATCH 1/4] [POWERPC] qe_lib and users: get rid of device_types and model

[Anton Vorontsov]

Now we're searching for "fsl,qe", "fsl,qe-muram", "fsl,qe-muram-data"
and "fsl,qe-ic".

Per http://ozlabs.org/pipermail/linuxppc-dev/2007-December/048388.html

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
 Documentation/powerpc/booting-without-of.txt |    6 ++++--
 arch/powerpc/boot/dts/mpc832x_mds.dts        |   11 ++++++-----
 arch/powerpc/boot/dts/mpc832x_rdb.dts        |   11 ++++++-----
 arch/powerpc/boot/dts/mpc836x_mds.dts        |   11 ++++++-----
 arch/powerpc/boot/dts/mpc8568mds.dts         |   11 ++++++-----
 arch/powerpc/platforms/83xx/mpc832x_mds.c    |   11 +++++++----
 arch/powerpc/platforms/83xx/mpc832x_rdb.c    |   11 +++++++----
 arch/powerpc/platforms/83xx/mpc836x_mds.c    |   11 +++++++----
 arch/powerpc/platforms/85xx/mpc85xx_mds.c    |   16 +++++++++++-----
 arch/powerpc/sysdev/fsl_soc.c                |    5 ++++-
 arch/powerpc/sysdev/qe_lib/qe.c              |   16 +++++++++++++---
 11 files changed, 77 insertions(+), 43 deletions(-)

diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt
index ee0209a..ed0b92c 100644
--- a/Documentation/powerpc/booting-without-of.txt
+++ b/Documentation/powerpc/booting-without-of.txt
@@ -1770,7 +1770,7 @@ platforms are moved over to use the flattened-device-tree model.
    vii) Multi-User RAM (MURAM)
 
    Required properties:
-   - device_type : should be "muram".
+   - compatible : should be "fsl,cpm-muram", "fsl,qe-muram".
    - mode : the could be "host" or "slave".
    - ranges : Should be defined as specified in 1) to describe the
       translation of MURAM addresses.
@@ -1780,10 +1780,12 @@ platforms are moved over to use the flattened-device-tree model.
    Example:
 
 	muram@10000 {
-		device_type = "muram";
+		compatible = "fsl,cpm-muram", "fsl,qe-muram";
 		ranges = <0 00010000 0000c000>;
 
 		data-only@0{
+			compatible = "fsl,cpm-muram-data",
+				     "fsl,qe-muram-data";
 			reg = <0 c000>;
 		};
 	};
diff --git a/arch/powerpc/boot/dts/mpc832x_mds.dts b/arch/powerpc/boot/dts/mpc832x_mds.dts
index 26ac467..010c8d9 100644
--- a/arch/powerpc/boot/dts/mpc832x_mds.dts
+++ b/arch/powerpc/boot/dts/mpc832x_mds.dts
@@ -175,18 +175,19 @@
 	qe@e0100000 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		device_type = "qe";
-		model = "QE";
+		compatible = "fsl,qe";
 		ranges = <0 e0100000 00100000>;
 		reg = <e0100000 480>;
 		brg-frequency = <0>;
 		bus-frequency = <BCD3D80>;
 
 		muram@10000 {
-			device_type = "muram";
+			compatible = "fsl,cpm-muram", "fsl,qe-muram";
 			ranges = <0 00010000 00004000>;
 
 			data-only@0 {
+				compatible = "fsl,cpm-muram-data",
+					     "fsl,qe-muram-data";
 				reg = <0 4000>;
 			};
 		};
@@ -271,9 +272,9 @@
 			};
 		};
 
-		qeic: qeic@80 {
+		qeic: interrupt-controller@80 {
 			interrupt-controller;
-			device_type = "qeic";
+			compatible = "fsl,qe-ic";
 			#address-cells = <0>;
 			#interrupt-cells = <1>;
 			reg = <80 80>;
diff --git a/arch/powerpc/boot/dts/mpc832x_rdb.dts b/arch/powerpc/boot/dts/mpc832x_rdb.dts
index 10ff7aa..3a73134 100644
--- a/arch/powerpc/boot/dts/mpc832x_rdb.dts
+++ b/arch/powerpc/boot/dts/mpc832x_rdb.dts
@@ -165,18 +165,19 @@
 	qe@e0100000 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		device_type = "qe";
-		model = "QE";
+		compatible = "fsl,qe";
 		ranges = <0 e0100000 00100000>;
 		reg = <e0100000 480>;
 		brg-frequency = <0>;
 		bus-frequency = <BCD3D80>;
 
 		muram@10000 {
-			device_type = "muram";
+			compatible = "fsl,cpm-muram", "fsl,qe-muram";
 			ranges = <0 00010000 00004000>;
 
 			data-only@0 {
+				compatible = "fsl,cpm-muram-data",
+					     "fsl,qe-muram-data";
 				reg = <0 4000>;
 			};
 		};
@@ -252,9 +253,9 @@
 			};
 		};
 
-		qeic:qeic@80 {
+		qeic:interrupt-controller@80 {
 			interrupt-controller;
-			device_type = "qeic";
+			compatible = "fsl,qe-ic";
 			#address-cells = <0>;
 			#interrupt-cells = <1>;
 			reg = <80 80>;
diff --git a/arch/powerpc/boot/dts/mpc836x_mds.dts b/arch/powerpc/boot/dts/mpc836x_mds.dts
index fd841b2..2986860 100644
--- a/arch/powerpc/boot/dts/mpc836x_mds.dts
+++ b/arch/powerpc/boot/dts/mpc836x_mds.dts
@@ -206,18 +206,19 @@
 	qe@e0100000 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		device_type = "qe";
-		model = "QE";
+		compatible = "fsl,qe";
 		ranges = <0 e0100000 00100000>;
 		reg = <e0100000 480>;
 		brg-frequency = <0>;
 		bus-frequency = <179A7B00>;
 
 		muram@10000 {
-			device_type = "muram";
+			compatible = "fsl,cpm-muram", "fsl,qe-muram";
 			ranges = <0 00010000 0000c000>;
 
 			data-only@0{
+				compatible = "fsl,cpm-muram-data",
+					     "fsl,qe-muram-data";
 				reg = <0 c000>;
 			};
 		};
@@ -304,9 +305,9 @@
 			};
 		};
 
-		qeic: qeic@80 {
+		qeic: interrupt-controller@80 {
 			interrupt-controller;
-			device_type = "qeic";
+			compatible = "fsl,qe-ic";
 			#address-cells = <0>;
 			#interrupt-cells = <1>;
 			reg = <80 80>;
diff --git a/arch/powerpc/boot/dts/mpc8568mds.dts b/arch/powerpc/boot/dts/mpc8568mds.dts
index 5818a7c..7440347 100644
--- a/arch/powerpc/boot/dts/mpc8568mds.dts
+++ b/arch/powerpc/boot/dts/mpc8568mds.dts
@@ -283,18 +283,19 @@
 	qe@e0080000 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		device_type = "qe";
-		model = "QE";
+		compatible = "fsl,qe";
 		ranges = <0 e0080000 00040000>;
 		reg = <e0080000 480>;
 		brg-frequency = <0>;
 		bus-frequency = <179A7B00>;
 
 		muram@10000 {
-			device_type = "muram";
+			compatible = "fsl,cpm-muram", "fsl,qe-muram";
 			ranges = <0 00010000 0000c000>;
 
 			data-only@0{
+				compatible = "fsl,cpm-muram-data",
+					     "fsl,qe-muram-data";
 				reg = <0 c000>;
 			};
 		};
@@ -385,9 +386,9 @@
 			};
 		};
 
-		qeic: qeic@80 {
+		qeic: interrupt-controller@80 {
 			interrupt-controller;
-			device_type = "qeic";
+			compatible = "fsl,qe-ic";
 			#address-cells = <0>;
 			#interrupt-cells = <1>;
 			reg = <80 80>;
diff --git a/arch/powerpc/platforms/83xx/mpc832x_mds.c b/arch/powerpc/platforms/83xx/mpc832x_mds.c
index 1e570bb..ec41284 100644
--- a/arch/powerpc/platforms/83xx/mpc832x_mds.c
+++ b/arch/powerpc/platforms/83xx/mpc832x_mds.c
@@ -105,6 +105,7 @@ static struct of_device_id mpc832x_ids[] = {
 	{ .type = "soc", },
 	{ .compatible = "soc", },
 	{ .type = "qe", },
+	{ .compatible = "fsl,qe", },
 	{},
 };
 
@@ -137,10 +138,12 @@ static void __init mpc832x_sys_init_IRQ(void)
 	of_node_put(np);
 
 #ifdef CONFIG_QUICC_ENGINE
-	np = of_find_node_by_type(NULL, "qeic");
-	if (!np)
-		return;
-
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
+	if (!np) {
+		np = of_find_node_by_type(NULL, "qeic");
+		if (!np)
+			return;
+	}
 	qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic);
 	of_node_put(np);
 #endif				/* CONFIG_QUICC_ENGINE */
diff --git a/arch/powerpc/platforms/83xx/mpc832x_rdb.c b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
index ffb2e93..3025871 100644
--- a/arch/powerpc/platforms/83xx/mpc832x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
@@ -118,6 +118,7 @@ static struct of_device_id mpc832x_ids[] = {
 	{ .type = "soc", },
 	{ .compatible = "soc", },
 	{ .type = "qe", },
+	{ .compatible = "fsl,qe", },
 	{},
 };
 
@@ -151,10 +152,12 @@ void __init mpc832x_rdb_init_IRQ(void)
 	of_node_put(np);
 
 #ifdef CONFIG_QUICC_ENGINE
-	np = of_find_node_by_type(NULL, "qeic");
-	if (!np)
-		return;
-
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
+	if (!np) {
+		np = of_find_node_by_type(NULL, "qeic");
+		if (!np)
+			return;
+	}
 	qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic);
 	of_node_put(np);
 #endif				/* CONFIG_QUICC_ENGINE */
diff --git a/arch/powerpc/platforms/83xx/mpc836x_mds.c b/arch/powerpc/platforms/83xx/mpc836x_mds.c
index 2ac9890..788291c 100644
--- a/arch/powerpc/platforms/83xx/mpc836x_mds.c
+++ b/arch/powerpc/platforms/83xx/mpc836x_mds.c
@@ -136,6 +136,7 @@ static struct of_device_id mpc836x_ids[] = {
 	{ .type = "soc", },
 	{ .compatible = "soc", },
 	{ .type = "qe", },
+	{ .compatible = "fsl,qe", },
 	{},
 };
 
@@ -168,10 +169,12 @@ static void __init mpc836x_mds_init_IRQ(void)
 	of_node_put(np);
 
 #ifdef CONFIG_QUICC_ENGINE
-	np = of_find_node_by_type(NULL, "qeic");
-	if (!np)
-		return;
-
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
+	if (!np) {
+		np = of_find_node_by_type(NULL, "qeic");
+		if (!np)
+			return;
+	}
 	qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic);
 	of_node_put(np);
 #endif				/* CONFIG_QUICC_ENGINE */
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_mds.c b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
index e6c63a5..4fa6d6c 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_mds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
@@ -94,7 +94,10 @@ static void __init mpc85xx_mds_setup_arch(void)
 #endif
 
 #ifdef CONFIG_QUICC_ENGINE
-	if ((np = of_find_node_by_name(NULL, "qe")) != NULL) {
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe");
+	if (!np)
+		np = of_find_node_by_name(NULL, "qe");
+	if (np) {
 		qe_reset();
 		of_node_put(np);
 	}
@@ -139,6 +142,7 @@ static struct of_device_id mpc85xx_ids[] = {
 	{ .type = "soc", },
 	{ .compatible = "soc", },
 	{ .type = "qe", },
+	{ .compatible = "fsl,qe", },
 	{},
 };
 
@@ -179,10 +183,12 @@ static void __init mpc85xx_mds_pic_init(void)
 	mpic_init(mpic);
 
 #ifdef CONFIG_QUICC_ENGINE
-	np = of_find_node_by_type(NULL, "qeic");
-	if (!np)
-		return;
-
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
+	if (!np) {
+		np = of_find_node_by_type(NULL, "qeic");
+		if (!np)
+			return;
+	}
 	qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);
 	of_node_put(np);
 #endif				/* CONFIG_QUICC_ENGINE */
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index 4baad80..60d9c4e 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -1226,7 +1226,10 @@ int __init fsl_spi_init(struct spi_board_info *board_infos,
 	const u32 *sysclk;
 
 	/* SPI controller is either clocked from QE or SoC clock */
-	np = of_find_node_by_type(NULL, "qe");
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe");
+	if (!np)
+		np = of_find_node_by_type(NULL, "qe");
+
 	if (!np)
 		np = of_find_node_by_type(NULL, "soc");
 
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c
index 21e0106..cd6cee3 100644
--- a/arch/powerpc/sysdev/qe_lib/qe.c
+++ b/arch/powerpc/sysdev/qe_lib/qe.c
@@ -68,7 +68,10 @@ phys_addr_t get_qe_base(void)
 	if (qebase != -1)
 		return qebase;
 
-	qe = of_find_node_by_type(NULL, "qe");
+	qe = of_find_compatible_node(NULL, NULL, "fsl,qe");
+	if (!qe)
+		qe = of_find_node_by_type(NULL, "qe");
+
 	if (qe) {
 		unsigned int size;
 		const void *prop = of_get_property(qe, "reg", &size);
@@ -155,7 +158,10 @@ unsigned int get_brg_clk(void)
 	if (brg_clk)
 		return brg_clk;
 
-	qe = of_find_node_by_type(NULL, "qe");
+	qe = of_find_compatible_node(NULL, NULL, "fsl,qe");
+	if (!qe)
+		qe = of_find_node_by_type(NULL, "qe");
+
 	if (qe) {
 		unsigned int size;
 		const u32 *prop = of_get_property(qe, "brg-frequency", &size);
@@ -334,7 +340,11 @@ static void qe_muram_init(void)
 	/* XXX: This is a subset of the available muram. It
 	 * varies with the processor and the microcode patches activated.
 	 */
-	if ((np = of_find_node_by_name(NULL, "data-only")) != NULL) {
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe-muram-data");
+	if (!np)
+		np = of_find_node_by_name(NULL, "data-only");
+
+	if (np) {
 		address = *of_get_address(np, 0, &size, &flags);
 		of_node_put(np);
 		rh_attach_region(&qe_muram_info, address, (int) size);
-- 
1.5.2.2

[PATCH 2/4] [POWERPC][NET] ucc_geth_mii and users: get rid of device_type

[Anton Vorontsov]

device_type property is bogus, thus use proper compatible.

Also change compatible property to "fsl,ucc-mdio".

Per http://ozlabs.org/pipermail/linuxppc-dev/2007-December/048388.html

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
 arch/powerpc/boot/dts/mpc832x_mds.dts |    3 +--
 arch/powerpc/boot/dts/mpc832x_rdb.dts |    3 +--
 arch/powerpc/boot/dts/mpc836x_mds.dts |    3 +--
 arch/powerpc/boot/dts/mpc8568mds.dts  |    2 +-
 drivers/net/ucc_geth_mii.c            |    3 +++
 5 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/boot/dts/mpc832x_mds.dts b/arch/powerpc/boot/dts/mpc832x_mds.dts
index 010c8d9..cf41194 100644
--- a/arch/powerpc/boot/dts/mpc832x_mds.dts
+++ b/arch/powerpc/boot/dts/mpc832x_mds.dts
@@ -255,8 +255,7 @@
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <2320 18>;
-			device_type = "mdio";
-			compatible = "ucc_geth_phy";
+			compatible = "fsl,ucc-mdio";
 
 			phy3: ethernet-phy@03 {
 				interrupt-parent = < &ipic >;
diff --git a/arch/powerpc/boot/dts/mpc832x_rdb.dts b/arch/powerpc/boot/dts/mpc832x_rdb.dts
index 3a73134..09301c1 100644
--- a/arch/powerpc/boot/dts/mpc832x_rdb.dts
+++ b/arch/powerpc/boot/dts/mpc832x_rdb.dts
@@ -236,8 +236,7 @@
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <3120 18>;
-			device_type = "mdio";
-			compatible = "ucc_geth_phy";
+			compatible = "fsl,ucc-mdio";
 
 			phy00:ethernet-phy@00 {
 				interrupt-parent = <&pic>;
diff --git a/arch/powerpc/boot/dts/mpc836x_mds.dts b/arch/powerpc/boot/dts/mpc836x_mds.dts
index 2986860..3eb8f72 100644
--- a/arch/powerpc/boot/dts/mpc836x_mds.dts
+++ b/arch/powerpc/boot/dts/mpc836x_mds.dts
@@ -288,8 +288,7 @@
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <2120 18>;
-			device_type = "mdio";
-			compatible = "ucc_geth_phy";
+			compatible = "fsl,ucc-mdio";
 
 			phy0: ethernet-phy@00 {
 				interrupt-parent = < &ipic >;
diff --git a/arch/powerpc/boot/dts/mpc8568mds.dts b/arch/powerpc/boot/dts/mpc8568mds.dts
index 7440347..2bc147f 100644
--- a/arch/powerpc/boot/dts/mpc8568mds.dts
+++ b/arch/powerpc/boot/dts/mpc8568mds.dts
@@ -356,7 +356,7 @@
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <2120 18>;
-			compatible = "ucc_geth_phy";
+			compatible = "fsl,ucc-mdio";
 
 			/* These are the same PHYs as on
 			 * gianfar's MDIO bus */
diff --git a/drivers/net/ucc_geth_mii.c b/drivers/net/ucc_geth_mii.c
index df884f0..e3ba14a 100644
--- a/drivers/net/ucc_geth_mii.c
+++ b/drivers/net/ucc_geth_mii.c
@@ -256,6 +256,9 @@ static struct of_device_id uec_mdio_match[] = {
 		.type = "mdio",
 		.compatible = "ucc_geth_phy",
 	},
+	{
+		.compatible = "fsl,ucc-mdio",
+	},
 	{},
 };
 
-- 
1.5.2.2

[PATCH 3/4] [POWERPC][SPI] use brg-frequency for SPI in QE

[Anton Vorontsov]

In case of QE we can use brg-frequency (which is qeclk/2).
Thus no need to divide sysclk in the spi_mpc83xx.

This patch also adds code to use get_brgfreq() on QE chips.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
---
 arch/powerpc/sysdev/fsl_soc.c |   44 ++++++++++++++++++++++++++++------------
 drivers/spi/spi_mpc83xx.c     |    6 +----
 2 files changed, 32 insertions(+), 18 deletions(-)

diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index 60d9c4e..7b13876 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -66,7 +66,7 @@ phys_addr_t get_immrbase(void)
 
 EXPORT_SYMBOL(get_immrbase);
 
-#if defined(CONFIG_CPM2) || defined(CONFIG_8xx)
+#if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
 
 static u32 brgfreq = -1;
 
@@ -91,11 +91,21 @@ u32 get_brgfreq(void)
 
 	/* Legacy device binding -- will go away when no users are left. */
 	node = of_find_node_by_type(NULL, "cpm");
+	if (!node)
+		node = of_find_compatible_node(NULL, NULL, "fsl,qe");
+	if (!node)
+		node = of_find_node_by_type(NULL, "qe");
+
 	if (node) {
 		prop = of_get_property(node, "brg-frequency", &size);
 		if (prop && size == 4)
 			brgfreq = *prop;
 
+		if (brgfreq == -1 || brgfreq == 0) {
+			prop = of_get_property(node, "bus-frequency", &size);
+			if (prop && size == 4)
+				brgfreq = *prop / 2;
+		}
 		of_node_put(node);
 	}
 
@@ -1223,22 +1233,30 @@ int __init fsl_spi_init(struct spi_board_info *board_infos,
 {
 	struct device_node *np;
 	unsigned int i;
-	const u32 *sysclk;
+	u32 sysclk;
 
 	/* SPI controller is either clocked from QE or SoC clock */
-	np = of_find_compatible_node(NULL, NULL, "fsl,qe");
-	if (!np)
-		np = of_find_node_by_type(NULL, "qe");
+	sysclk = get_brgfreq();
+	if (sysclk == -1) {
+		const u32 *freq;
+		int size;
 
-	if (!np)
 		np = of_find_node_by_type(NULL, "soc");
+		if (!np)
+			return -ENODEV;
+
+		freq = of_get_property(np, "clock-frequency", &size);
+		if (!freq || size != sizeof(*freq) || *freq == 0) {
+			freq = of_get_property(np, "bus-frequency", &size);
+			if (!freq || size != sizeof(*freq) || *freq == 0) {
+				of_node_put(np);
+				return -ENODEV;
+			}
+		}
 
-	if (!np)
-		return -ENODEV;
-
-	sysclk = of_get_property(np, "bus-frequency", NULL);
-	if (!sysclk)
-		return -ENODEV;
+		sysclk = *freq;
+		of_node_put(np);
+	}
 
 	for (np = NULL, i = 1;
 	     (np = of_find_compatible_node(np, "spi", "fsl_spi")) != NULL;
@@ -1255,7 +1273,7 @@ int __init fsl_spi_init(struct spi_board_info *board_infos,
 
 		memset(res, 0, sizeof(res));
 
-		pdata.sysclk = *sysclk;
+		pdata.sysclk = sysclk;
 
 		prop = of_get_property(np, "reg", NULL);
 		if (!prop)
diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c
index 4580b9c..04f7cd9 100644
--- a/drivers/spi/spi_mpc83xx.c
+++ b/drivers/spi/spi_mpc83xx.c
@@ -436,11 +436,7 @@ static int __init mpc83xx_spi_probe(struct platform_device *dev)
 	mpc83xx_spi->qe_mode = pdata->qe_mode;
 	mpc83xx_spi->get_rx = mpc83xx_spi_rx_buf_u8;
 	mpc83xx_spi->get_tx = mpc83xx_spi_tx_buf_u8;
-
-	if (mpc83xx_spi->qe_mode)
-		mpc83xx_spi->spibrg = pdata->sysclk / 2;
-	else
-		mpc83xx_spi->spibrg = pdata->sysclk;
+	mpc83xx_spi->spibrg = pdata->sysclk;
 
 	mpc83xx_spi->rx_shift = 0;
 	mpc83xx_spi->tx_shift = 0;
-- 
1.5.2.2

[PATCH 4/4] [POWERPC] fsl_spi_init and users: stop using device_type = "spi"

[Anton Vorontsov]

Also:
- rename "fsl_spi" to "fsl,spi";
- add and use cell-index property, if found;
- split probing code out of fsl_spi_init, thus we can call
  it for legacy device_type probing and new "compatible" probing.

Per http://ozlabs.org/pipermail/linuxppc-dev/2007-December/048388.html

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
 Documentation/powerpc/booting-without-of.txt |    8 +-
 arch/powerpc/boot/dts/mpc8313erdb.dts        |    4 +-
 arch/powerpc/boot/dts/mpc832x_mds.dts        |    8 +-
 arch/powerpc/boot/dts/mpc832x_rdb.dts        |    8 +-
 arch/powerpc/boot/dts/mpc8349emitx.dts       |    4 +-
 arch/powerpc/boot/dts/mpc8349emitxgp.dts     |    4 +-
 arch/powerpc/boot/dts/mpc834x_mds.dts        |    4 +-
 arch/powerpc/boot/dts/mpc836x_mds.dts        |    8 +-
 arch/powerpc/boot/dts/mpc8568mds.dts         |    8 +-
 arch/powerpc/sysdev/fsl_soc.c                |   94 ++++++++++++++++----------
 10 files changed, 86 insertions(+), 64 deletions(-)

diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt
index ed0b92c..2b30611 100644
--- a/Documentation/powerpc/booting-without-of.txt
+++ b/Documentation/powerpc/booting-without-of.txt
@@ -1563,8 +1563,8 @@ platforms are moved over to use the flattened-device-tree model.
    ii) SPI (Serial Peripheral Interface)
 
    Required properties:
-   - device_type : should be "spi".
-   - compatible : should be "fsl_spi".
+   - cell-index : SPI controller index.
+   - compatible : should be "fsl,spi".
    - mode : the SPI operation mode, it can be "cpu" or "cpu-qe".
    - reg : Offset and length of the register set for the device
    - interrupts : <a b> where a is the interrupt number and b is a
@@ -1577,8 +1577,8 @@ platforms are moved over to use the flattened-device-tree model.
 
    Example:
 	spi@4c0 {
-		device_type = "spi";
-		compatible = "fsl_spi";
+		cell-index = <0>;
+		compatible = "fsl,spi";
 		reg = <4c0 40>;
 		interrupts = <82 0>;
 		interrupt-parent = <700>;
diff --git a/arch/powerpc/boot/dts/mpc8313erdb.dts b/arch/powerpc/boot/dts/mpc8313erdb.dts
index c5b6665..a0492b6 100644
--- a/arch/powerpc/boot/dts/mpc8313erdb.dts
+++ b/arch/powerpc/boot/dts/mpc8313erdb.dts
@@ -82,8 +82,8 @@
 		};
 
 		spi@7000 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <0>;
+			compatible = "fsl,spi";
 			reg = <7000 1000>;
 			interrupts = <10 8>;
 			interrupt-parent = < &ipic >;
diff --git a/arch/powerpc/boot/dts/mpc832x_mds.dts b/arch/powerpc/boot/dts/mpc832x_mds.dts
index cf41194..cc99fb0 100644
--- a/arch/powerpc/boot/dts/mpc832x_mds.dts
+++ b/arch/powerpc/boot/dts/mpc832x_mds.dts
@@ -193,8 +193,8 @@
 		};
 
 		spi@4c0 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <0>;
+			compatible = "fsl,spi";
 			reg = <4c0 40>;
 			interrupts = <2>;
 			interrupt-parent = < &qeic >;
@@ -202,8 +202,8 @@
 		};
 
 		spi@500 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <1>;
+			compatible = "fsl,spi";
 			reg = <500 40>;
 			interrupts = <1>;
 			interrupt-parent = < &qeic >;
diff --git a/arch/powerpc/boot/dts/mpc832x_rdb.dts b/arch/powerpc/boot/dts/mpc832x_rdb.dts
index 09301c1..c0e5e93 100644
--- a/arch/powerpc/boot/dts/mpc832x_rdb.dts
+++ b/arch/powerpc/boot/dts/mpc832x_rdb.dts
@@ -183,8 +183,8 @@
 		};
 
 		spi@4c0 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <0>;
+			compatible = "fsl,spi";
 			reg = <4c0 40>;
 			interrupts = <2>;
 			interrupt-parent = <&qeic>;
@@ -192,8 +192,8 @@
 		};
 
 		spi@500 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <1>;
+			compatible = "fsl,spi";
 			reg = <500 40>;
 			interrupts = <1>;
 			interrupt-parent = <&qeic>;
diff --git a/arch/powerpc/boot/dts/mpc8349emitx.dts b/arch/powerpc/boot/dts/mpc8349emitx.dts
index e354f26..f8fc5f6 100644
--- a/arch/powerpc/boot/dts/mpc8349emitx.dts
+++ b/arch/powerpc/boot/dts/mpc8349emitx.dts
@@ -82,8 +82,8 @@
 		};
 
 		spi@7000 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <0>;
+			compatible = "fsl,spi";
 			reg = <7000 1000>;
 			interrupts = <10 8>;
 			interrupt-parent = < &ipic >;
diff --git a/arch/powerpc/boot/dts/mpc8349emitxgp.dts b/arch/powerpc/boot/dts/mpc8349emitxgp.dts
index ebdf0b7..666650c 100644
--- a/arch/powerpc/boot/dts/mpc8349emitxgp.dts
+++ b/arch/powerpc/boot/dts/mpc8349emitxgp.dts
@@ -80,8 +80,8 @@
 		};
 
 		spi@7000 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <0>;
+			compatible = "fsl,spi";
 			reg = <7000 1000>;
 			interrupts = <10 8>;
 			interrupt-parent = < &ipic >;
diff --git a/arch/powerpc/boot/dts/mpc834x_mds.dts b/arch/powerpc/boot/dts/mpc834x_mds.dts
index 0ba13eb..6ed36a1 100644
--- a/arch/powerpc/boot/dts/mpc834x_mds.dts
+++ b/arch/powerpc/boot/dts/mpc834x_mds.dts
@@ -93,8 +93,8 @@
 		};
 
 		spi@7000 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <0>;
+			compatible = "fsl,spi";
 			reg = <7000 1000>;
 			interrupts = <10 8>;
 			interrupt-parent = < &ipic >;
diff --git a/arch/powerpc/boot/dts/mpc836x_mds.dts b/arch/powerpc/boot/dts/mpc836x_mds.dts
index 3eb8f72..be7dfed 100644
--- a/arch/powerpc/boot/dts/mpc836x_mds.dts
+++ b/arch/powerpc/boot/dts/mpc836x_mds.dts
@@ -224,8 +224,8 @@
 		};
 
 		spi@4c0 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <0>;
+			compatible = "fsl,spi";
 			reg = <4c0 40>;
 			interrupts = <2>;
 			interrupt-parent = < &qeic >;
@@ -233,8 +233,8 @@
 		};
 
 		spi@500 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <1>;
+			compatible = "fsl,spi";
 			reg = <500 40>;
 			interrupts = <1>;
 			interrupt-parent = < &qeic >;
diff --git a/arch/powerpc/boot/dts/mpc8568mds.dts b/arch/powerpc/boot/dts/mpc8568mds.dts
index 2bc147f..84474cb 100644
--- a/arch/powerpc/boot/dts/mpc8568mds.dts
+++ b/arch/powerpc/boot/dts/mpc8568mds.dts
@@ -301,8 +301,8 @@
 		};
 
 		spi@4c0 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <0>;
+			compatible = "fsl,spi";
 			reg = <4c0 40>;
 			interrupts = <2>;
 			interrupt-parent = <&qeic>;
@@ -310,8 +310,8 @@
 		};
 
 		spi@500 {
-			device_type = "spi";
-			compatible = "fsl_spi";
+			cell-index = <1>;
+			compatible = "fsl,spi";
 			reg = <500 40>;
 			interrupts = <1>;
 			interrupt-parent = <&qeic>;
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index 7b13876..cec1ab7 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -1226,42 +1226,17 @@ arch_initcall(cpm_smc_uart_of_init);
 #endif /* CONFIG_8xx */
 #endif /* CONFIG_PPC_CPM_NEW_BINDING */
 
-int __init fsl_spi_init(struct spi_board_info *board_infos,
-			unsigned int num_board_infos,
-			void (*activate_cs)(u8 cs, u8 polarity),
-			void (*deactivate_cs)(u8 cs, u8 polarity))
+static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
+				   struct spi_board_info *board_infos,
+				   unsigned int num_board_infos,
+				   void (*activate_cs)(u8 cs, u8 polarity),
+				   void (*deactivate_cs)(u8 cs, u8 polarity))
 {
 	struct device_node *np;
-	unsigned int i;
-	u32 sysclk;
-
-	/* SPI controller is either clocked from QE or SoC clock */
-	sysclk = get_brgfreq();
-	if (sysclk == -1) {
-		const u32 *freq;
-		int size;
-
-		np = of_find_node_by_type(NULL, "soc");
-		if (!np)
-			return -ENODEV;
-
-		freq = of_get_property(np, "clock-frequency", &size);
-		if (!freq || size != sizeof(*freq) || *freq == 0) {
-			freq = of_get_property(np, "bus-frequency", &size);
-			if (!freq || size != sizeof(*freq) || *freq == 0) {
-				of_node_put(np);
-				return -ENODEV;
-			}
-		}
-
-		sysclk = *freq;
-		of_node_put(np);
-	}
+	unsigned int i = 0;
 
-	for (np = NULL, i = 1;
-	     (np = of_find_compatible_node(np, "spi", "fsl_spi")) != NULL;
-	     i++) {
-		int ret = 0;
+	for_each_compatible_node(np, type, compatible) {
+		int ret;
 		unsigned int j;
 		const void *prop;
 		struct resource res[2];
@@ -1280,6 +1255,10 @@ int __init fsl_spi_init(struct spi_board_info *board_infos,
 			goto err;
 		pdata.bus_num = *(u32 *)prop;
 
+		prop = of_get_property(np, "cell-index", NULL);
+		if (prop)
+			i = *(u32 *)prop;
+
 		prop = of_get_property(np, "mode", NULL);
 		if (prop && !strcmp(prop, "cpu-qe"))
 			pdata.qe_mode = 1;
@@ -1290,7 +1269,7 @@ int __init fsl_spi_init(struct spi_board_info *board_infos,
 		}
 
 		if (!pdata.max_chipselect)
-			goto err;
+			continue;
 
 		ret = of_address_to_resource(np, 0, &res[0]);
 		if (ret)
@@ -1317,13 +1296,56 @@ int __init fsl_spi_init(struct spi_board_info *board_infos,
 		if (ret)
 			goto unreg;
 
-		continue;
+		goto next;
 unreg:
 		platform_device_del(pdev);
 err:
-		continue;
+		pr_err("%s: registration failed\n", np->full_name);
+next:
+		i++;
 	}
 
+	return i;
+}
+
+int __init fsl_spi_init(struct spi_board_info *board_infos,
+			unsigned int num_board_infos,
+			void (*activate_cs)(u8 cs, u8 polarity),
+			void (*deactivate_cs)(u8 cs, u8 polarity))
+{
+	u32 sysclk;
+	int ret;
+
+	/* SPI controller is either clocked from QE or SoC clock */
+	sysclk = get_brgfreq();
+	if (sysclk == -1) {
+		struct device_node *np;
+		const u32 *freq;
+		int size;
+
+		np = of_find_node_by_type(NULL, "soc");
+		if (!np)
+			return -ENODEV;
+
+		freq = of_get_property(np, "clock-frequency", &size);
+		if (!freq || size != sizeof(*freq) || *freq == 0) {
+			freq = of_get_property(np, "bus-frequency", &size);
+			if (!freq || size != sizeof(*freq) || *freq == 0) {
+				of_node_put(np);
+				return -ENODEV;
+			}
+		}
+
+		sysclk = *freq;
+		of_node_put(np);
+	}
+
+	ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
+			       num_board_infos, activate_cs, deactivate_cs);
+	if (!ret)
+		of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
+				 num_board_infos, activate_cs, deactivate_cs);
+
 	return spi_register_board_info(board_infos, num_board_infos);
 }
 
-- 
1.5.2.2