m68k: m5441x: add flexcan support

Add flexcan support.

Signed-off-by: Angelo Dureghello <angelo@kernel-space.org>
Made the flexcan resource inclusion conditional based on the enablement
of the flexcan driver. This commit is no longer dependant on the
presence of the updated driver in mainline.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>

diff --git a/arch/m68k/coldfire/device.c b/arch/m68k/coldfire/device.c
index 59f7dfe..0386252 100644 (file)
--- a/arch/m68k/coldfire/device.c
+++ b/arch/m68k/coldfire/device.c
@@ -581,6 +581,47 @@ static struct platform_device mcf_esdhc = {
 };
 #endif /* MCFSDHC_BASE */
 
+#if IS_ENABLED(CONFIG_CAN_FLEXCAN)
+
+#include <linux/can/platform/flexcan.h>
+
+static struct flexcan_platform_data mcf5441x_flexcan_info = {
+       .clk_src = 1,
+       .clock_frequency = 120000000,
+};
+
+static struct resource mcf5441x_flexcan0_resource[] = {
+       {
+               .start = MCFFLEXCAN_BASE0,
+               .end = MCFFLEXCAN_BASE0 + MCFFLEXCAN_SIZE,
+               .flags = IORESOURCE_MEM,
+       },
+       {
+               .start = MCF_IRQ_IFL0,
+               .end = MCF_IRQ_IFL0,
+               .flags = IORESOURCE_IRQ,
+       },
+       {
+               .start = MCF_IRQ_BOFF0,
+               .end = MCF_IRQ_BOFF0,
+               .flags = IORESOURCE_IRQ,
+       },
+       {
+               .start = MCF_IRQ_ERR0,
+               .end = MCF_IRQ_ERR0,
+               .flags = IORESOURCE_IRQ,
+       },
+};
+
+static struct platform_device mcf_flexcan0 = {
+       .name = "flexcan-mcf5441x",
+       .id = 0,
+       .num_resources = ARRAY_SIZE(mcf5441x_flexcan0_resource),
+       .resource = mcf5441x_flexcan0_resource,
+       .dev.platform_data = &mcf5441x_flexcan_info,
+};
+#endif /* IS_ENABLED(CONFIG_CAN_FLEXCAN) */
+
 static struct platform_device *mcf_devices[] __initdata = {
        &mcf_uart,
 #if IS_ENABLED(CONFIG_FEC)
@@ -616,6 +657,9 @@ static struct platform_device *mcf_devices[] __initdata = {
 #ifdef MCFSDHC_BASE
        &mcf_esdhc,
 #endif
+#if IS_ENABLED(CONFIG_CAN_FLEXCAN)
+       &mcf_flexcan0,
+#endif
 };
 
 /*

diff --git a/arch/m68k/coldfire/m5441x.c b/arch/m68k/coldfire/m5441x.c
index ce14693..3985504 100644 (file)
--- a/arch/m68k/coldfire/m5441x.c
+++ b/arch/m68k/coldfire/m5441x.c
@@ -19,8 +19,8 @@
 #include <asm/mcfclk.h>
 
 DEFINE_CLK(0, "flexbus", 2, MCF_CLK);
-DEFINE_CLK(0, "mcfcan.0", 8, MCF_CLK);
-DEFINE_CLK(0, "mcfcan.1", 9, MCF_CLK);
+DEFINE_CLK(0, "flexcan.0", 8, MCF_CLK);
+DEFINE_CLK(0, "flexcan.1", 9, MCF_CLK);
 DEFINE_CLK(0, "imx1-i2c.1", 14, MCF_CLK);
 DEFINE_CLK(0, "mcfdspi.1", 15, MCF_CLK);
 DEFINE_CLK(0, "edma", 17, MCF_CLK);
@@ -142,6 +142,8 @@ static struct clk_lookup m5411x_clk_lookup[] = {
 
 static struct clk * const enable_clks[] __initconst = {
        /* make sure these clocks are enabled */
+       &__clk_0_8, /* flexcan.0 */
+       &__clk_0_9, /* flexcan.1 */
        &__clk_0_15, /* dspi.1 */
        &__clk_0_17, /* eDMA */
        &__clk_0_18, /* intc0 */
@@ -162,8 +164,6 @@ static struct clk * const enable_clks[] __initconst = {
        &__clk_1_37, /* gpio */
 };
 static struct clk * const disable_clks[] __initconst = {
-       &__clk_0_8, /* can.0 */
-       &__clk_0_9, /* can.1 */
        &__clk_0_14, /* i2c.1 */
        &__clk_0_22, /* i2c.0 */
        &__clk_0_23, /* dspi.0 */

diff --git a/arch/m68k/include/asm/m5441xsim.h b/arch/m68k/include/asm/m5441xsim.h
index e091e36..f48cf63 100644 (file)
--- a/arch/m68k/include/asm/m5441xsim.h
+++ b/arch/m68k/include/asm/m5441xsim.h
@@ -73,6 +73,12 @@
 #define MCFINT0_FECENTC1       55
 
 /* on interrupt controller 1 */
+#define MCFINT1_FLEXCAN0_IFL   0
+#define MCFINT1_FLEXCAN0_BOFF  1
+#define MCFINT1_FLEXCAN0_ERR   3
+#define MCFINT1_FLEXCAN1_IFL   4
+#define MCFINT1_FLEXCAN1_BOFF  5
+#define MCFINT1_FLEXCAN1_ERR   7
 #define MCFINT1_UART4          48
 #define MCFINT1_UART5          49
 #define MCFINT1_UART6          50
@@ -314,4 +320,17 @@
 #define MCF_IRQ_SDHC           (MCFINT2_VECBASE + MCFINT2_SDHC)
 #define MCFSDHC_CLK            (MCFSDHC_BASE + 0x2c)
 
+/*
+ * Flexcan module
+ */
+#define MCFFLEXCAN_BASE0       0xfc020000
+#define MCFFLEXCAN_BASE1       0xfc024000
+#define MCFFLEXCAN_SIZE                0x4000
+#define MCF_IRQ_IFL0           (MCFINT1_VECBASE + MCFINT1_FLEXCAN0_IFL)
+#define MCF_IRQ_BOFF0          (MCFINT1_VECBASE + MCFINT1_FLEXCAN0_BOFF)
+#define MCF_IRQ_ERR0           (MCFINT1_VECBASE + MCFINT1_FLEXCAN0_ERR)
+#define MCF_IRQ_IFL1           (MCFINT1_VECBASE + MCFINT1_FLEXCAN1_IFL)
+#define MCF_IRQ_BOFF1          (MCFINT1_VECBASE + MCFINT1_FLEXCAN1_BOFF)
+#define MCF_IRQ_ERR1           (MCFINT1_VECBASE + MCFINT1_FLEXCAN1_ERR)
+
 #endif /* m5441xsim_h */