imx6: add flexcan support

backport upstream changes to 3.10:
 - 0060-flexcan.patch:
   - add flexcan pinctrl and devicetree config
 - 0061-can-flexcan-use-correct-clock-as-base-for-bit-rate-c.patch
   - fix a clock issue
 - 0062-ARM-i.MX6q-fix-the-wrong-parent-of-can_root-clock.patch
   - fix a clock issue

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39033 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 154 insertions, 0 deletions

diff --git a/target/linux/imx6/patches-3.10/0060-flexcan.patch b/target/linux/imx6/patches-3.10/0060-flexcan.patch
new file mode 100644
index 0000000000..11a66c538a
--- /dev/null
+++ b/target/linux/imx6/patches-3.10/0060-flexcan.patch
@@ -0,0 +1,92 @@
+--- a/arch/arm/boot/dts/imx6q.dtsi
++++ b/arch/arm/boot/dts/imx6q.dtsi
+@@ -163,6 +163,31 @@
+ 					};
+ 				};
+ 
++				flexcan1 {
++					pinctrl_flexcan1_1: flexcan1grp-1 {
++						fsl,pins = <
++							MX6Q_PAD_KEY_ROW2__FLEXCAN1_RX 0x80000000
++							MX6Q_PAD_KEY_COL2__FLEXCAN1_TX 0x80000000
++						>;
++					};
++
++					pinctrl_flexcan1_2: flexcan1grp-2 {
++						fsl,pins = <
++							MX6Q_PAD_GPIO_7__FLEXCAN1_TX   0x80000000
++							MX6Q_PAD_KEY_ROW2__FLEXCAN1_RX 0x80000000
++						>;
++					};
++				};
++
++				flexcan2 {
++					pinctrl_flexcan2_1: flexcan2grp-1 {
++						fsl,pins = <
++							MX6Q_PAD_KEY_COL4__FLEXCAN2_TX 0x80000000
++							MX6Q_PAD_KEY_ROW4__FLEXCAN2_RX 0x80000000
++						>;
++					};
++				};
++
+ 				gpmi-nand {
+ 					pinctrl_gpmi_nand_1: gpmi-nand-1 {
+ 						fsl,pins = <
+--- a/arch/arm/boot/dts/imx6qdl.dtsi
++++ b/arch/arm/boot/dts/imx6qdl.dtsi
+@@ -292,13 +292,21 @@
+ 			};
+ 
+ 			can1: flexcan@02090000 {
++				compatible = "fsl,imx6q-flexcan";
+ 				reg = <0x02090000 0x4000>;
+ 				interrupts = <0 110 0x04>;
++				clocks = <&clks 108>, <&clks 109>;
++				clock-names = "ipg", "per";
++				status = "disabled";
+ 			};
+ 
+ 			can2: flexcan@02094000 {
++				compatible = "fsl,imx6q-flexcan";
+ 				reg = <0x02094000 0x4000>;
+ 				interrupts = <0 111 0x04>;
++				clocks = <&clks 110>, <&clks 111>;
++				clock-names = "ipg", "per";
++				status = "disabled";
+ 			};
+ 
+ 			gpt: gpt@02098000 {
+--- a/arch/arm/boot/dts/imx6dl.dtsi
++++ b/arch/arm/boot/dts/imx6dl.dtsi
+@@ -80,6 +80,31 @@
+ 					};
+ 				};
+ 
++				flexcan1 {
++					pinctrl_flexcan1_1: flexcan1grp-1 {
++						fsl,pins = <
++							MX6DL_PAD_KEY_ROW2__FLEXCAN1_RX 0x80000000
++							MX6DL_PAD_KEY_COL2__FLEXCAN1_TX 0x80000000
++						>;
++					};
++
++					pinctrl_flexcan1_2: flexcan1grp-2 {
++						fsl,pins = <
++							MX6DL_PAD_GPIO_7__FLEXCAN1_TX   0x80000000
++							MX6DL_PAD_KEY_ROW2__FLEXCAN1_RX 0x80000000
++						>;
++					};
++				};
++
++				flexcan2 {
++					pinctrl_flexcan2_1: flexcan2grp-1 {
++						fsl,pins = <
++							MX6DL_PAD_KEY_COL4__FLEXCAN2_TX 0x80000000
++							MX6DL_PAD_KEY_ROW4__FLEXCAN2_RX 0x80000000
++						>;
++					};
++				};
++
+ 				uart1 {
+ 					pinctrl_uart1_1: uart1grp-1 {
+ 						fsl,pins = <
diff --git a/target/linux/imx6/patches-3.10/0061-can-flexcan-use-correct-clock-as-base-for-bit-rate-c.patch b/target/linux/imx6/patches-3.10/0061-can-flexcan-use-correct-clock-as-base-for-bit-rate-c.patch
new file mode 100644
index 0000000000..c35d7c90c2
--- /dev/null
+++ b/target/linux/imx6/patches-3.10/0061-can-flexcan-use-correct-clock-as-base-for-bit-rate-c.patch
@@ -0,0 +1,37 @@
+From 1a3e5173f5e72cbf7f0c8927b33082e361c16d72 Mon Sep 17 00:00:00 2001
+From: Marc Kleine-Budde <mkl@pengutronix.de>
+Date: Mon, 25 Nov 2013 22:15:20 +0100
+Subject: [PATCH] can: flexcan: use correct clock as base for bit rate
+ calculation
+
+The flexcan IP core uses the peripheral clock ("per") as basic clock for the
+bit timing calculation. However the driver uses the the wrong clock ("ipg").
+This leads to wrong bit rates if the rates on both clock are different.
+
+This patch fixes the problem by using the correct clock for the bit rate
+calculation.
+
+Cc: linux-stable <stable@vger.kernel.org>
+Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
+---
+ drivers/net/can/flexcan.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/net/can/flexcan.c
++++ b/drivers/net/can/flexcan.c
+@@ -1025,7 +1025,6 @@ static int flexcan_probe(struct platform
+ 			err = PTR_ERR(clk_ipg);
+ 			goto failed_clock;
+ 		}
+-		clock_freq = clk_get_rate(clk_ipg);
+ 
+ 		clk_per = devm_clk_get(&pdev->dev, "per");
+ 		if (IS_ERR(clk_per)) {
+@@ -1033,6 +1032,7 @@ static int flexcan_probe(struct platform
+ 			err = PTR_ERR(clk_per);
+ 			goto failed_clock;
+ 		}
++		clock_freq = clk_get_rate(clk_per);
+ 	}
+ 
+ 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
diff --git a/target/linux/imx6/patches-3.10/0062-ARM-i.MX6q-fix-the-wrong-parent-of-can_root-clock.patch b/target/linux/imx6/patches-3.10/0062-ARM-i.MX6q-fix-the-wrong-parent-of-can_root-clock.patch
new file mode 100644
index 0000000000..8ea02f6dc6
--- /dev/null
+++ b/target/linux/imx6/patches-3.10/0062-ARM-i.MX6q-fix-the-wrong-parent-of-can_root-clock.patch
@@ -0,0 +1,25 @@
+From 9b3d423707c3b1f6633be1be7e959623e10c596b Mon Sep 17 00:00:00 2001
+From: Jiada Wang <jiada_wang@mentor.com>
+Date: Wed, 30 Oct 2013 04:25:51 -0700
+Subject: [PATCH] ARM: i.MX6q: fix the wrong parent of can_root clock
+
+instead of pll3_usb_otg the parent of can_root clock
+should be pll3_60m.
+
+Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
+Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
+---
+ arch/arm/mach-imx/clk-imx6q.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/arm/mach-imx/clk-imx6q.c
++++ b/arch/arm/mach-imx/clk-imx6q.c
+@@ -442,7 +442,7 @@ int __init mx6q_clocks_init(void)
+ 	clk[asrc_podf]        = imx_clk_divider("asrc_podf",        "asrc_pred",         base + 0x30, 9,  3);
+ 	clk[spdif_pred]       = imx_clk_divider("spdif_pred",       "spdif_sel",         base + 0x30, 25, 3);
+ 	clk[spdif_podf]       = imx_clk_divider("spdif_podf",       "spdif_pred",        base + 0x30, 22, 3);
+-	clk[can_root]         = imx_clk_divider("can_root",         "pll3_usb_otg",      base + 0x20, 2,  6);
++	clk[can_root]         = imx_clk_divider("can_root",         "pll3_60m",          base + 0x20, 2,  6);
+ 	clk[ecspi_root]       = imx_clk_divider("ecspi_root",       "pll3_60m",          base + 0x38, 19, 6);
+ 	clk[gpu2d_core_podf]  = imx_clk_divider("gpu2d_core_podf",  "gpu2d_core_sel",    base + 0x18, 23, 3);
+ 	clk[gpu3d_core_podf]  = imx_clk_divider("gpu3d_core_podf",  "gpu3d_core_sel",    base + 0x18, 26, 3);