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authorLuka Perkov <luka@openwrt.org>2013-12-11 10:56:09 +0000
committerLuka Perkov <luka@openwrt.org>2013-12-11 10:56:09 +0000
commit2bbd43d065dabbd3b8824680a793db8464cf0a2e (patch)
tree4d2826c2679ee29936fa7c472c64b04172a14950
parentbda5d4072148c5ceab6190d5c96cbcae61247949 (diff)
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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
-rw-r--r--target/linux/imx6/patches-3.10/0060-flexcan.patch92
-rw-r--r--target/linux/imx6/patches-3.10/0061-can-flexcan-use-correct-clock-as-base-for-bit-rate-c.patch37
-rw-r--r--target/linux/imx6/patches-3.10/0062-ARM-i.MX6q-fix-the-wrong-parent-of-can_root-clock.patch25
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 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
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
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);