[PATCH 5/5] ARM: mach-shmobile: kzm9g: Reference DT implementation
From: horms@verge.net.au (Simon Horman)
Date: 2012-11-30 08:44:45
Also in:
linux-sh
Subsystem:
arm and arm64 soc sub-architectures (common parts), arm port, arm/risc-v/renesas architecture, the rest · Maintainers:
Arnd Bergmann, Krzysztof Kozlowski, Alexandre Belloni, Linus Walleij, Russell King, Geert Uytterhoeven, Magnus Damm, Linus Torvalds
From: Simon Horman <redacted> 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 device using device tree: - MMCIF (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 <redacted> --- v2 * Do not initialise touchscreen, it requires the INTC interrupt controller but for now this configuration only has the GIC interrupt controller. * Define mmcif and sdhi in SoC dtsi and reference in board dts. * Do not initialise SDHI, the driver needs to be updated --- arch/arm/boot/dts/Makefile | 3 +- arch/arm/boot/dts/sh73a0-kzm9g-reference.dts | 37 ++++++++++ arch/arm/mach-shmobile/Kconfig | 10 +++ arch/arm/mach-shmobile/Makefile | 8 ++- arch/arm/mach-shmobile/board-kzm9g-reference.c | 92 ++++++++++++++++++++++++ 5 files changed, 148 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 f37cf9f..c606375 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile@@ -77,7 +77,8 @@ 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..588016e
--- /dev/null
+++ b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts@@ -0,0 +1,37 @@ +/* + * 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/ "sh73a0-reference.dtsi" + +/ { + model = "KZM-A9-GT"; + compatible = "renesas,kzm9g-reference", "renesas,sh73a0"; + + memory { + device_type = "memory"; + reg = <0x41000000 0x1e800000>; + }; + + fixedregulator1v8: fixedregulator at 0 { + compatible = "regulator-fixed"; + regulator-name = "fixed-1.8V"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + }; +}; + +&mmcif { + vmmc-supply = <&fixedregulator1v8>; + vqmmc-supply = <&fixedregulator1v8>; +};
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 e3556c6..7ffa428 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile@@ -51,7 +51,13 @@ 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..29c334d
--- /dev/null
+++ b/arch/arm/mach-shmobile/board-kzm9g-reference.c@@ -0,0 +1,92 @@ +/* + * 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@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 void __init kzm_init(void) +{ + /* 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); + + /* 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); + + /* 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(); +} + +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
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1.7.10.4