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>
SVN-Revision: 39033

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 (file)
index 0000000..11a66c5
--- /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 (file)
index 0000000..c35d7c9
--- /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 (file)
index 0000000..8ea02f6
--- /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);