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Date: Mon, 25 May 2015 13:03:54 +0200
From: Hauke Mehrtens <hauke@...ke-m.de>
To: Paul Burton <paul.burton@...tec.com>, linux-mips@...ux-mips.org
CC: Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Mark Rutland <mark.rutland@....com>,
Pawel Moll <pawel.moll@....com>,
Ralf Baechle <ralf@...ux-mips.org>,
Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
Joshua Kinard <kumba@...too.org>,
Leonid Yegoshin <Leonid.Yegoshin@...tec.com>,
Deng-Cheng Zhu <dengcheng.zhu@...tec.com>,
linux-kernel@...r.kernel.org,
Markos Chandras <markos.chandras@...tec.com>,
Andreas Herrmann <andreas.herrmann@...iumnetworks.com>
Subject: Re: [PATCH v5 36/37] MIPS: ingenic: initial JZ4780 support
On 05/24/2015 05:11 PM, Paul Burton wrote:
> Support the Ingenic JZ4780 SoC using the existing code under
> arch/mips/jz4740 now that it has been generalised sufficiently.
>
> Signed-off-by: Paul Burton <paul.burton@...tec.com>
> Cc: Ian Campbell <ijc+devicetree@...lion.org.uk>
> Cc: Kumar Gala <galak@...eaurora.org>
> Cc: Lars-Peter Clausen <lars@...afoo.de>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Pawel Moll <pawel.moll@....com>
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: devicetree@...r.kernel.org
> Cc: linux-mips@...ux-mips.org
> ---
>
> Changes in v5:
> - Disable the UARTs by default, so that devices can enable only the ones
> they actually expose.
>
> Changes in v4: None
> Changes in v3:
> - Rebase, dropping serial.h & relocating behind CONFIG_MACH_INGENIC.
>
> Changes in v2: None
>
> arch/mips/boot/dts/ingenic/jz4780.dtsi | 111 +++++++++++++++++++++
> arch/mips/include/asm/cpu-type.h | 2 +-
> .../asm/mach-jz4740/cpu-feature-overrides.h | 3 -
> arch/mips/include/asm/mach-jz4740/irq.h | 4 +
> arch/mips/jz4740/Kconfig | 6 ++
> arch/mips/jz4740/Makefile | 4 +-
> arch/mips/jz4740/setup.c | 3 +
> arch/mips/jz4740/time.c | 7 +-
> 8 files changed, 134 insertions(+), 6 deletions(-)
> create mode 100644 arch/mips/boot/dts/ingenic/jz4780.dtsi
>
> diff --git a/arch/mips/boot/dts/ingenic/jz4780.dtsi b/arch/mips/boot/dts/ingenic/jz4780.dtsi
> new file mode 100644
> index 0000000..65389f6
> --- /dev/null
> +++ b/arch/mips/boot/dts/ingenic/jz4780.dtsi
> @@ -0,0 +1,111 @@
> +#include <dt-bindings/clock/jz4780-cgu.h>
> +
> +/ {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + compatible = "ingenic,jz4780";
> +
> + cpuintc: interrupt-controller {
> + #address-cells = <0>;
> + #interrupt-cells = <1>;
> + interrupt-controller;
> + compatible = "mti,cpu-interrupt-controller";
> + };
> +
> + intc: interrupt-controller@...01000 {
> + compatible = "ingenic,jz4780-intc";
> + reg = <0x10001000 0x50>;
> +
> + interrupt-controller;
> + #interrupt-cells = <1>;
> +
> + interrupt-parent = <&cpuintc>;
> + interrupts = <2>;
> + };
> +
> + ext: ext {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + };
> +
> + rtc: rtc {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <32768>;
> + };
> +
> + cgu: jz4780-cgu@...00000 {
> + compatible = "ingenic,jz4780-cgu";
> + reg = <0x10000000 0x100>;
> +
> + clocks = <&ext>, <&rtc>;
> + clock-names = "ext", "rtc";
> +
> + #clock-cells = <1>;
> + };
> +
> + uart0: serial@...30000 {
> + compatible = "ingenic,jz4780-uart";
> + reg = <0x10030000 0x100>;
> +
> + interrupt-parent = <&intc>;
> + interrupts = <51>;
> +
> + clocks = <&ext>, <&cgu JZ4780_CLK_UART0>;
> + clock-names = "baud", "module";
> +
> + status = "disabled";
> + };
> +
> + uart1: serial@...31000 {
> + compatible = "ingenic,jz4780-uart";
> + reg = <0x10031000 0x100>;
> +
> + interrupt-parent = <&intc>;
> + interrupts = <50>;
> +
> + clocks = <&ext>, <&cgu JZ4780_CLK_UART1>;
> + clock-names = "baud", "module";
> +
> + status = "disabled";
> + };
> +
> + uart2: serial@...32000 {
> + compatible = "ingenic,jz4780-uart";
> + reg = <0x10032000 0x100>;
> +
> + interrupt-parent = <&intc>;
> + interrupts = <49>;
> +
> + clocks = <&ext>, <&cgu JZ4780_CLK_UART2>;
> + clock-names = "baud", "module";
> +
> + status = "disabled";
> + };
> +
> + uart3: serial@...33000 {
> + compatible = "ingenic,jz4780-uart";
> + reg = <0x10033000 0x100>;
> +
> + interrupt-parent = <&intc>;
> + interrupts = <48>;
> +
> + clocks = <&ext>, <&cgu JZ4780_CLK_UART3>;
> + clock-names = "baud", "module";
> +
> + status = "disabled";
> + };
> +
> + uart4: serial@...34000 {
> + compatible = "ingenic,jz4780-uart";
> + reg = <0x10034000 0x100>;
> +
> + interrupt-parent = <&intc>;
> + interrupts = <34>;
> +
> + clocks = <&ext>, <&cgu JZ4780_CLK_UART4>;
> + clock-names = "baud", "module";
> +
> + status = "disabled";
> + };
> +};
> diff --git a/arch/mips/include/asm/cpu-type.h b/arch/mips/include/asm/cpu-type.h
> index 33f3cab..d41e8e2 100644
> --- a/arch/mips/include/asm/cpu-type.h
> +++ b/arch/mips/include/asm/cpu-type.h
> @@ -32,12 +32,12 @@ static inline int __pure __get_cpu_type(const int cpu_type)
> case CPU_4KC:
> case CPU_ALCHEMY:
> case CPU_PR4450:
> - case CPU_JZRISC:
> #endif
>
> #if defined(CONFIG_SYS_HAS_CPU_MIPS32_R1) || \
> defined(CONFIG_SYS_HAS_CPU_MIPS32_R2)
> case CPU_4KEC:
> + case CPU_JZRISC:
> #endif
>
> #ifdef CONFIG_SYS_HAS_CPU_MIPS32_R2
> diff --git a/arch/mips/include/asm/mach-jz4740/cpu-feature-overrides.h b/arch/mips/include/asm/mach-jz4740/cpu-feature-overrides.h
> index a225baa..0933f94 100644
> --- a/arch/mips/include/asm/mach-jz4740/cpu-feature-overrides.h
> +++ b/arch/mips/include/asm/mach-jz4740/cpu-feature-overrides.h
> @@ -12,8 +12,6 @@
> #define cpu_has_3k_cache 0
> #define cpu_has_4k_cache 1
> #define cpu_has_tx39_cache 0
> -#define cpu_has_fpu 0
> -#define cpu_has_32fpr 0
> #define cpu_has_counter 0
> #define cpu_has_watch 1
> #define cpu_has_divec 1
> @@ -34,7 +32,6 @@
> #define cpu_has_ic_fills_f_dc 0
> #define cpu_has_pindexed_dcache 0
> #define cpu_has_mips32r1 1
> -#define cpu_has_mips32r2 0
> #define cpu_has_mips64r1 0
> #define cpu_has_mips64r2 0
> #define cpu_has_dsp 0
> diff --git a/arch/mips/include/asm/mach-jz4740/irq.h b/arch/mips/include/asm/mach-jz4740/irq.h
> index b218f76..9b439fc 100644
> --- a/arch/mips/include/asm/mach-jz4740/irq.h
> +++ b/arch/mips/include/asm/mach-jz4740/irq.h
> @@ -21,6 +21,8 @@
>
> #ifdef CONFIG_MACH_JZ4740
> # define NR_INTC_IRQS 32
> +#else
> +# define NR_INTC_IRQS 64
> #endif
>
> /* 1st-level interrupts */
> @@ -48,6 +50,8 @@
> #define JZ4740_IRQ_IPU JZ4740_IRQ(29)
> #define JZ4740_IRQ_LCD JZ4740_IRQ(30)
>
> +#define JZ4780_IRQ_TCU2 JZ4740_IRQ(25)
> +
> /* 2nd-level interrupts */
> #define JZ4740_IRQ_DMA(x) (JZ4740_IRQ(NR_INTC_IRQS) + (x))
>
> diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
> index dff0966..21adcea 100644
> --- a/arch/mips/jz4740/Kconfig
> +++ b/arch/mips/jz4740/Kconfig
> @@ -12,3 +12,9 @@ endchoice
> config MACH_JZ4740
> bool
> select SYS_HAS_CPU_MIPS32_R1
> +
> +config MACH_JZ4780
> + bool
> + select MIPS_CPU_SCACHE
> + select SYS_HAS_CPU_MIPS32_R2
> + select SYS_SUPPORTS_HIGHMEM
> diff --git a/arch/mips/jz4740/Makefile b/arch/mips/jz4740/Makefile
> index 89ce401..39d70bd 100644
> --- a/arch/mips/jz4740/Makefile
> +++ b/arch/mips/jz4740/Makefile
> @@ -5,7 +5,9 @@
> # Object file lists.
>
> obj-y += prom.o time.o reset.o setup.o \
> - gpio.o platform.o timer.o
> + platform.o timer.o
> +
> +obj-$(CONFIG_MACH_JZ4740) += gpio.o
>
> CFLAGS_setup.o = -I$(src)/../../../scripts/dtc/libfdt
>
> diff --git a/arch/mips/jz4740/setup.c b/arch/mips/jz4740/setup.c
> index 1bed3cb..510fc0d 100644
> --- a/arch/mips/jz4740/setup.c
> +++ b/arch/mips/jz4740/setup.c
> @@ -83,6 +83,9 @@ arch_initcall(populate_machine);
>
> const char *get_system_type(void)
> {
> + if (config_enabled(CONFIG_MACH_JZ4780))
> + return "JZ4780";
> +
> return "JZ4740";
> }
Shouldn't this be provided by device tree, now it depends on your kernel
config.
>
> diff --git a/arch/mips/jz4740/time.c b/arch/mips/jz4740/time.c
> index 9172553..7ab47fe 100644
> --- a/arch/mips/jz4740/time.c
> +++ b/arch/mips/jz4740/time.c
> @@ -102,7 +102,12 @@ static struct clock_event_device jz4740_clockevent = {
> .set_next_event = jz4740_clockevent_set_next,
> .set_mode = jz4740_clockevent_set_mode,
> .rating = 200,
> +#ifdef CONFIG_MACH_JZ4740
> .irq = JZ4740_IRQ_TCU0,
> +#endif
> +#ifdef CONFIG_MACH_JZ4780
> + .irq = JZ4780_IRQ_TCU2,
> +#endif
> };
same here.
>
> static struct irqaction timer_irqaction = {
> @@ -144,7 +149,7 @@ void __init plat_time_init(void)
>
> sched_clock_register(jz4740_read_sched_clock, 16, clk_rate);
>
> - setup_irq(JZ4740_IRQ_TCU0, &timer_irqaction);
> + setup_irq(jz4740_clockevent.irq, &timer_irqaction);
>
> ctrl = JZ_TIMER_CTRL_PRESCALE_16 | JZ_TIMER_CTRL_SRC_EXT;
>
>
--
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