[PATCH 7/7] ARM: mach-shmobile: kzm9g: Reference DT implementation
Simon Horman
horms at verge.net.au
Sun Nov 25 19:16:54 EST 2012
Provide alternate board code for the kzm9g to demonstrate
how DT may be used given the current state of driver
device tree support. This is intended to act as a reference
for mach-shmobile developers.
Some notes:
* Brings up the GIC interrupt handler using device tree
* Brings up the following devices using device tree
- ST1232 (Touchscreen)
- MMCIF (MMC)
- SDHI (MMC)
* Does not bring up the INTC interrupt controller at all,
thus external devices may not be used
* Uses existing C code and not device tree to initialise the following,
which are needed for a working board:
- SCIF (Serial)
- CMT (Clock)
- PFC (GPIO)
To use this alternate board code instead of the normal board code,
CONFIG_MACH_KZM9G_REFERENCE should be selected in the kernel config.
And the sh73a0-kzm9g-reference.dtb flattened device tree blob should be used.
Signed-off-by: Simon Horman <horms at verge.net.au>
---
arch/arm/boot/dts/Makefile | 3 +-
arch/arm/boot/dts/sh73a0-kzm9g-reference.dts | 153 ++++++++++++++++++++++++
arch/arm/mach-shmobile/Kconfig | 10 ++
arch/arm/mach-shmobile/Makefile | 8 +-
arch/arm/mach-shmobile/board-kzm9g-reference.c | 142 ++++++++++++++++++++++
5 files changed, 314 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
create mode 100644 arch/arm/mach-shmobile/board-kzm9g-reference.c
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index c1ce813..b6c4fa2 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -75,7 +75,8 @@ dtb-$(CONFIG_ARCH_PRIMA2) += prima2-evb.dtb
dtb-$(CONFIG_ARCH_U8500) += snowball.dtb
dtb-$(CONFIG_ARCH_SHMOBILE) += emev2-kzm9d.dtb \
r8a7740-armadillo800eva.dtb \
- sh73a0-kzm9g.dtb
+ sh73a0-kzm9g.dtb \
+ sh73a0-kzm9g-reference.dtb
dtb-$(CONFIG_ARCH_SPEAR13XX) += spear1310-evb.dtb \
spear1340-evb.dtb
dtb-$(CONFIG_ARCH_SPEAR3XX)+= spear300-evb.dtb \
diff --git a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
new file mode 100644
index 0000000..978892a
--- /dev/null
+++ b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
@@ -0,0 +1,153 @@
+/*
+ * Device Tree Source for the KZM-A9-GT board
+ *
+ * Copyright (C) 2012 Horms Solutions Ltd.
+ *
+ * Based on sh73a0-kzm9g.dts
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/dts-v1/;
+/include/ "skeleton.dtsi"
+
+/ {
+ model = "KZM-A9-GT";
+ compatible = "renesas,kzm9g-reference", "renesas,sh73a0";
+
+ memory {
+ device_type = "memory";
+ reg = <0x41000000 0x1e800000>;
+ };
+
+ gic: interrupt-controller at f0001000 {
+ compatible = "arm,cortex-a9-gic";
+ #interrupt-cells = <3>;
+ #address-cells = <1>;
+ interrupt-controller;
+ reg = <0xf0001000 0x1000>,
+ <0xf0000100 0x100>;
+ };
+
+ i2c0: i2c at 0xe6820000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "renesas,rmobile-iic";
+ reg = <0xe6820000 0x425>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 167 0x4
+ 0 170 0x4>;
+ };
+
+ i2c1: i2c at 0xe6822000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "renesas,rmobile-iic";
+ reg = <0xe6822000 0x425>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 51 0x4
+ 0 44 0x4>;
+
+ touchscreen at 55 {
+ compatible = "sitronix,st1232";
+ reg = <0x55>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 9 0x4>;
+ };
+ };
+
+ i2c2: i2c at 0xe6824000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "renesas,rmobile-iic";
+ reg = <0xe6824000 0x425>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 171 0x4
+ 0 174 0x4>;
+ };
+
+ i2c3: i2c at 0xe6826000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "renesas,rmobile-iic";
+ reg = <0xe6826000 0x425>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 183 0x4
+ 0 186 0x4>;
+ };
+
+ i2c4: i2c at 0xe6828000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "renesas,rmobile-iic";
+ reg = <0xe6828000 0x425>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 187 0x4
+ 0 190 0x4>;
+ };
+
+ gpio: gpio at 0 {
+ compatible = "renesas,sh_pfc-sh73a0";
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+
+ fixedregulator1v8: fixedregulator at 0 {
+ compatible = "regulator-fixed";
+ regulator-name = "fixed-1.8V";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ fixedregulator2v8: fixedregulator at 1 {
+ compatible = "regulator-fixed";
+ regulator-name = "fixed-2.8V";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ };
+
+ mmcif at 0x10010000 {
+ compatible = "renesas,sh-mmcif";
+ reg = <0xe6bd0000 0x100>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 140 0x4
+ 0 141 0x4>;
+ reg-io-width = <4>;
+ vmmc-supply = <&fixedregulator1v8>;
+ vqmmc-supply = <&fixedregulator1v8>;
+ };
+
+ sdhi0 at 0xee100000 {
+ compatible = "renesas,shmobile-sdhi";
+ reg = <0xee100000 0x100>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 83 0x4
+ 0 84 0x4
+ 0 85 0x4>;
+ interrupt-names = "card_detect", "sdcard", "sdio";
+ reg-io-width = <2>;
+ vmmc-supply = <&fixedregulator2v8>;
+ vqmmc-supply = <&fixedregulator2v8>;
+ renesas,shmobile-sdhi-has-idle-wait;
+ };
+
+ sdhi2 at 0xee140000 {
+ compatible = "renesas,shmobile-sdhi";
+ reg = <0xee140000 0x100>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 103 0x4
+ 0 104 0x4
+ 0 105 0x4>;
+ interrupt-names = "card_detect", "sdcard", "sdio";
+ reg-io-width = <2>;
+ vmmc-supply = <&fixedregulator2v8>;
+ vqmmc-supply = <&fixedregulator2v8>;
+ renesas,shmobile-sdhi-has-idle-wait;
+ renesas,shmobile-sdhi-use-gpio-cd;
+ renesas,shmobile-sdhi-wrprotect-disable;
+ cd-gpios = <&gpio 13 1>;
+ };
+};
diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index 8ae100c..ca95c2b 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -136,6 +136,16 @@ config MACH_KZM9G
select SND_SOC_AK4642 if SND_SIMPLE_CARD
select USE_OF
+config MACH_KZM9G_REFERENCE
+ bool "KZM-A9-GT board - Reference Device Tree Implementation"
+ depends on MACH_KZM9G
+ ---help---
+ Use reference implementation of KZM-A9-GT board support
+ which makes as greater use of device tree at the expense
+ of not supporting a number of devices.
+
+ This is intended to aid developers
+
comment "SH-Mobile System Configuration"
config CPU_HAS_INTEVT
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index fe2c97c..87f50fa 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -55,7 +55,13 @@ obj-$(CONFIG_MACH_BONITO) += board-bonito.o
obj-$(CONFIG_MACH_MARZEN) += board-marzen.o
obj-$(CONFIG_MACH_ARMADILLO800EVA) += board-armadillo800eva.o
obj-$(CONFIG_MACH_KZM9D) += board-kzm9d.o
-obj-$(CONFIG_MACH_KZM9G) += board-kzm9g.o
+ifeq ($(CONFIG_MACH_KZM9G),y)
+ifeq ($(CONFIG_MACH_KZM9G_REFERENCE),y)
+obj-y += board-kzm9g-reference.o
+else
+obj-y += board-kzm9g.o
+endif
+endif
# Framework support
obj-$(CONFIG_SMP) += $(smp-y)
diff --git a/arch/arm/mach-shmobile/board-kzm9g-reference.c b/arch/arm/mach-shmobile/board-kzm9g-reference.c
new file mode 100644
index 0000000..a3bee425
--- /dev/null
+++ b/arch/arm/mach-shmobile/board-kzm9g-reference.c
@@ -0,0 +1,142 @@
+/*
+ * KZM-A9-GT board support - Reference Device Tree Implementation
+ *
+ * Copyright (C) 2012 Horms Solutions Ltd.
+ *
+ * Based on board-kzm9g.c
+ * Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/input.h>
+#include <linux/of_platform.h>
+#include <mach/sh73a0.h>
+#include <mach/common.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/hardware/gic.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+
+static const struct of_dev_auxdata kzm_auxdata_lookup[] __initconst = {
+ OF_DEV_AUXDATA("renesas,rmobile-iic", 0xe6820000,
+ "i2c-sh_mobile.0", NULL),
+ OF_DEV_AUXDATA("renesas,rmobile-iic", 0xe6822000,
+ "i2c-sh_mobile.1", NULL),
+ OF_DEV_AUXDATA("renesas,rmobile-iic", 0xe6824000,
+ "i2c-sh_mobile.2", NULL),
+ OF_DEV_AUXDATA("renesas,rmobile-iic", 0xe6826000,
+ "i2c-sh_mobile.3", NULL),
+ OF_DEV_AUXDATA("renesas,rmobile-iic", 0xe6828000,
+ "i2c-sh_mobile.4", NULL),
+ OF_DEV_AUXDATA("renesas,shmobile-sdhi", 0xee100000,
+ "sh_mobile_sdhi.0", NULL),
+ OF_DEV_AUXDATA("renesas,shmobile-sdhi", 0xee140000,
+ "sh_mobile_sdhi.2", NULL),
+ OF_DEV_AUXDATA("renesas,sh-mmcif", 0xe6bd0000, "sh_mmcif.0", NULL),
+ {},
+};
+
+static void __init kzm_init(void)
+{
+ sh73a0_pinmux_init();
+
+ /* enable SCIFA4 */
+ gpio_request(GPIO_FN_SCIFA4_TXD, NULL);
+ gpio_request(GPIO_FN_SCIFA4_RXD, NULL);
+ gpio_request(GPIO_FN_SCIFA4_RTS_, NULL);
+ gpio_request(GPIO_FN_SCIFA4_CTS_, NULL);
+
+ /* Touchscreen */
+ gpio_request(GPIO_PORT223, NULL); /* IRQ8 */
+ gpio_direction_input(GPIO_PORT223);
+
+ /* enable MMCIF */
+ gpio_request(GPIO_FN_MMCCLK0, NULL);
+ gpio_request(GPIO_FN_MMCCMD0_PU, NULL);
+ gpio_request(GPIO_FN_MMCD0_0_PU, NULL);
+ gpio_request(GPIO_FN_MMCD0_1_PU, NULL);
+ gpio_request(GPIO_FN_MMCD0_2_PU, NULL);
+ gpio_request(GPIO_FN_MMCD0_3_PU, NULL);
+ gpio_request(GPIO_FN_MMCD0_4_PU, NULL);
+ gpio_request(GPIO_FN_MMCD0_5_PU, NULL);
+ gpio_request(GPIO_FN_MMCD0_6_PU, NULL);
+ gpio_request(GPIO_FN_MMCD0_7_PU, NULL);
+
+ /* enable SD */
+ gpio_request(GPIO_FN_SDHIWP0, NULL);
+ gpio_request(GPIO_FN_SDHICD0, NULL);
+ gpio_request(GPIO_FN_SDHICMD0, NULL);
+ gpio_request(GPIO_FN_SDHICLK0, NULL);
+ gpio_request(GPIO_FN_SDHID0_3, NULL);
+ gpio_request(GPIO_FN_SDHID0_2, NULL);
+ gpio_request(GPIO_FN_SDHID0_1, NULL);
+ gpio_request(GPIO_FN_SDHID0_0, NULL);
+ gpio_request(GPIO_FN_SDHI0_VCCQ_MC0_ON, NULL);
+ gpio_request(GPIO_PORT15, NULL);
+ gpio_direction_output(GPIO_PORT15, 1); /* power */
+
+ /* enable Micro SD */
+ gpio_request(GPIO_FN_SDHID2_0, NULL);
+ gpio_request(GPIO_FN_SDHID2_1, NULL);
+ gpio_request(GPIO_FN_SDHID2_2, NULL);
+ gpio_request(GPIO_FN_SDHID2_3, NULL);
+ gpio_request(GPIO_FN_SDHICMD2, NULL);
+ gpio_request(GPIO_FN_SDHICLK2, NULL);
+ gpio_request(GPIO_PORT14, NULL);
+ gpio_direction_output(GPIO_PORT14, 1); /* power */
+
+ /* I2C 3 */
+ gpio_request(GPIO_FN_PORT27_I2C_SCL3, NULL);
+ gpio_request(GPIO_FN_PORT28_I2C_SDA3, NULL);
+
+#ifdef CONFIG_CACHE_L2X0
+ /* Early BRESP enable, Shared attribute override enable, 64K*8way */
+ l2x0_init(IOMEM(0xf0100000), 0x40460000, 0x82000fff);
+#endif
+
+ sh73a0_add_standard_devices_dt();
+ of_platform_populate(NULL, of_default_bus_match_table,
+ kzm_auxdata_lookup, NULL);
+}
+
+static void kzm9g_restart(char mode, const char *cmd)
+{
+#define RESCNT2 IOMEM(0xe6188020)
+ /* Do soft power on reset */
+ writel((1 << 31), RESCNT2);
+}
+
+static const char *kzm9g_boards_compat_dt[] __initdata = {
+ "renesas,kzm9g-reference",
+ NULL,
+};
+
+DT_MACHINE_START(KZM9G_DT, "kzm9g-reference")
+ .smp = smp_ops(sh73a0_smp_ops),
+ .map_io = sh73a0_map_io,
+ .init_early = sh73a0_add_early_devices_dt,
+ .nr_irqs = NR_IRQS_LEGACY,
+ .init_irq = sh73a0_init_irq_dt,
+ .handle_irq = gic_handle_irq,
+ .init_machine = kzm_init,
+ .init_late = shmobile_init_late,
+ .timer = &shmobile_timer,
+ .restart = kzm9g_restart,
+ .dt_compat = kzm9g_boards_compat_dt,
+MACHINE_END
--
1.7.10.4
More information about the linux-arm-kernel
mailing list