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SubjectRe: [PATCH 5/6] ARM: EXYNOS: Minor fixes to enable EXYNOS5410 support
Date

Hi,

On Tuesday, October 01, 2013 08:17:06 PM Vyacheslav Tyrtov wrote:
> From: Tarek Dakhran <t.dakhran@samsung.com>
>
> Configure ARM_NR_BANKS as 16 for EXYNOS SoC.
> Enable cci_control_port_by_index for ACE_PORT.
> Add additional irqs for Exynos MCT.
> Set irq base as 256 for EXYNOS5410 SoC.

It would be better if these changes were separate patches as they touch
different code areas.

> Signed-off-by: Vyacheslav Tyrtov <v.tyrtov@samsung.com>
> ---
> arch/arm/Kconfig | 2 +-
> drivers/bus/arm-cci.c | 7 +++++++
> drivers/clocksource/exynos_mct.c | 8 +++++++-
> drivers/irqchip/exynos-combiner.c | 12 +++++++++++-
> 4 files changed, 26 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 3f7714d..7f88896 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -1080,7 +1080,7 @@ source arch/arm/mm/Kconfig
>
> config ARM_NR_BANKS
> int
> - default 16 if ARCH_EP93XX
> + default 16 if ARCH_EP93XX || ARCH_EXYNOS
> default 8
>
> config IWMMXT
> diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
> index 2009266..f2f5df1 100644
> --- a/drivers/bus/arm-cci.c
> +++ b/drivers/bus/arm-cci.c
> @@ -363,8 +363,15 @@ int notrace __cci_control_port_by_index(u32 port, bool enable)
> * interface (ie cci_disable_port_by_cpu(); control by general purpose
> * indexing is therefore disabled for ACE ports.
> */
> +
> + /*
> + * Using this way to enable cci_port on EXYNOS5410 SoC
> + */
> +
> +#ifndef CONFIG_SOC_EXYNOS5410
> if (ports[port].type == ACE_PORT)
> return -EPERM;
> +#endif

This won't work for multiplatform kernels, please detect EXYNOS5410
at runtime using the device tree info.

> cci_port_control(port, enable);
> return 0;
> diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
> index 5b34768..33884d7 100644
> --- a/drivers/clocksource/exynos_mct.c
> +++ b/drivers/clocksource/exynos_mct.c
> @@ -71,6 +71,12 @@ enum {
> MCT_L1_IRQ,
> MCT_L2_IRQ,
> MCT_L3_IRQ,
> +#ifdef CONFIG_ARM_CCI
> + MCT_L4_IRQ,
> + MCT_L5_IRQ,
> + MCT_L6_IRQ,
> + MCT_L7_IRQ,
> +#endif
> MCT_NR_IRQS,
> };
>
> @@ -406,7 +412,7 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt)
> mevt = container_of(evt, struct mct_clock_event_device, evt);
>
> mevt->base = EXYNOS4_MCT_L_BASE(cpu);
> - sprintf(mevt->name, "mct_tick%d", cpu);
> + snprintf(mevt->name, 10, "mct_tick%d", cpu);

What is the rationale behind this change?

Also there is nothing about it in the patch description.

> evt->name = mevt->name;
> evt->cpumask = cpumask_of(cpu);
> diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c
> index 868ed40..2e056fc 100644
> --- a/drivers/irqchip/exynos-combiner.c
> +++ b/drivers/irqchip/exynos-combiner.c
> @@ -18,6 +18,7 @@
> #include <linux/of_address.h>
> #include <linux/of_irq.h>
> #include <asm/mach/irq.h>
> +#include <plat/cpu.h>
>
> #include "irqchip.h"
>
> @@ -66,6 +67,11 @@ static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
> struct irq_chip *chip = irq_get_chip(irq);
> unsigned int cascade_irq, combiner_irq;
> unsigned long status;

Please add a newline here.

> + if (unlikely(!chip || !chip_data)) {
> + printk_once(KERN_ALERT "%s: Chip not found for IRQ %d\n"
> + , __func__, irq);
> + return;
> + }

There is nothing about this change in the patch description.

> chained_irq_enter(chip, desc);
>
> @@ -226,7 +232,11 @@ static int __init combiner_of_init(struct device_node *np,
> * get their IRQ from DT, remove this in order to get dynamic
> * allocation.
> */
> - irq_base = 160;
> +
> + if (soc_is_exynos5410())
> + irq_base = 256;
> + else
> + irq_base = 160;
>
> combiner_init(combiner_base, np, max_nr, irq_base);

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics



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