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Message-ID: <87k2eebl8e.fsf@free-electrons.com>
Date: Wed, 14 Sep 2016 16:37:53 +0200
From: Gregory CLEMENT <gregory.clement@...e-electrons.com>
To: Arnd Bergmann <arnd@...db.de>
Cc: linux-arm-kernel@...ts.infradead.org, Andrew Lunn <andrew@...n.ch>,
Jason Cooper <jason@...edaemon.net>,
Russell King <linux@...linux.org.uk>,
linux-kernel@...r.kernel.org,
Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Subject: Re: [PATCH 3/4] ARM: orion5x: avoid NO_IRQ in orion_ge00_switch_init
Hi Arnd,
On jeu., sept. 08 2016, Arnd Bergmann <arnd@...db.de> wrote:
> On Wednesday, September 7, 2016 4:03:16 AM CEST Andrew Lunn wrote:
>> On Tue, Sep 06, 2016 at 04:06:22PM +0200, Arnd Bergmann wrote:
>> > As of commit 5be9fc23cdb4 ("ARM: orion5x: fix legacy orion5x IRQ numbers"),
>> > IRQ zero is no longer a valid interrupt on Orion5x, so we can use the
>> > normal convention of using '0' to indicate an invalid interrupt, rather
>> > than the deprecated NO_IRQ constant
>> >
>> > My first approach was to pass a pointer to the resource into
>> > orion_ge00_switch_init(), but it seemed to just add complexity
>> > for no good.
>>
>> Hi Arnd
>>
>> You can simply this. DSA has never as far as i remember used an
>> interrupt passed via platform data. Two boards do seem to pass an
>> interrupt via a GPIO line, but it has never been used.
>>
>> So if you want, you could strip all this interrupt code out.
>>
>> There might be some patches coming soon which does add interrupt
>> support to DSA, but it will only be via device tree, since i don't
>> have a platform which is capable of using platform data for DSA.
>
> Ok, good idea!
>
> This is what I came up with, let me know if I should repost the
> whole series with this.
>
> Arnd
>
> From 75669f969287e9479f280642d251c1bac68f8d7c Mon Sep 17 00:00:00 2001
> From: Arnd Bergmann <arnd@...db.de>
> Date: Mon, 5 Sep 2016 16:18:45 +0200
> Subject: [PATCH] ARM: orion: simplify orion_ge00_switch_init
>
> One of the last users of NO_IRQ on ARM is the switch initialization
> code on orion5x, which sometimes passes a GPIO based IRQ number.
>
> However, the driver doesn't actually use this number, and according
> to Andrew Lunn never will do it for non-DT based machines, so
> we can simply drop the irq argument.
>
> Simplifying it further, we can also drop the static platform_device
> and instead call platform_device_register_data(), which in turn
> lets us mark the platform_data structures as __initdata and slightly
> reduce the memory consumption.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
I applied this version f the patch on mvebu/soc
Thanks,
Gregory
>
> diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
> index 058994e99570..04910764c385 100644
> --- a/arch/arm/mach-orion5x/common.c
> +++ b/arch/arm/mach-orion5x/common.c
> @@ -105,9 +105,9 @@ void __init orion5x_eth_init(struct mv643xx_eth_platform_data *eth_data)
> /*****************************************************************************
> * Ethernet switch
> ****************************************************************************/
> -void __init orion5x_eth_switch_init(struct dsa_platform_data *d, int irq)
> +void __init orion5x_eth_switch_init(struct dsa_platform_data *d)
> {
> - orion_ge00_switch_init(d, irq);
> + orion_ge00_switch_init(d);
> }
>
>
> diff --git a/arch/arm/mach-orion5x/common.h b/arch/arm/mach-orion5x/common.h
> index cd0389c6e822..8a4115bd441d 100644
> --- a/arch/arm/mach-orion5x/common.h
> +++ b/arch/arm/mach-orion5x/common.h
> @@ -41,7 +41,7 @@ void orion5x_setup_wins(void);
> void orion5x_ehci0_init(void);
> void orion5x_ehci1_init(void);
> void orion5x_eth_init(struct mv643xx_eth_platform_data *eth_data);
> -void orion5x_eth_switch_init(struct dsa_platform_data *d, int irq);
> +void orion5x_eth_switch_init(struct dsa_platform_data *d);
> void orion5x_i2c_init(void);
> void orion5x_sata_init(struct mv_sata_platform_data *sata_data);
> void orion5x_spi_init(void);
> diff --git a/arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c b/arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c
> index c742e7b40b0d..dccadf68ea2b 100644
> --- a/arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c
> +++ b/arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c
> @@ -101,7 +101,7 @@ static struct dsa_chip_data rd88f5181l_fxo_switch_chip_data = {
> .port_names[7] = "lan3",
> };
>
> -static struct dsa_platform_data rd88f5181l_fxo_switch_plat_data = {
> +static struct dsa_platform_data __initdata rd88f5181l_fxo_switch_plat_data = {
> .nr_chips = 1,
> .chip = &rd88f5181l_fxo_switch_chip_data,
> };
> @@ -120,7 +120,7 @@ static void __init rd88f5181l_fxo_init(void)
> */
> orion5x_ehci0_init();
> orion5x_eth_init(&rd88f5181l_fxo_eth_data);
> - orion5x_eth_switch_init(&rd88f5181l_fxo_switch_plat_data, NO_IRQ);
> + orion5x_eth_switch_init(&rd88f5181l_fxo_switch_plat_data);
> orion5x_uart0_init();
>
> mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET,
> diff --git a/arch/arm/mach-orion5x/rd88f5181l-ge-setup.c b/arch/arm/mach-orion5x/rd88f5181l-ge-setup.c
> index 7e977b794b0c..affe5ec825de 100644
> --- a/arch/arm/mach-orion5x/rd88f5181l-ge-setup.c
> +++ b/arch/arm/mach-orion5x/rd88f5181l-ge-setup.c
> @@ -102,7 +102,7 @@ static struct dsa_chip_data rd88f5181l_ge_switch_chip_data = {
> .port_names[7] = "lan3",
> };
>
> -static struct dsa_platform_data rd88f5181l_ge_switch_plat_data = {
> +static struct dsa_platform_data __initdata rd88f5181l_ge_switch_plat_data = {
> .nr_chips = 1,
> .chip = &rd88f5181l_ge_switch_chip_data,
> };
> @@ -125,8 +125,7 @@ static void __init rd88f5181l_ge_init(void)
> */
> orion5x_ehci0_init();
> orion5x_eth_init(&rd88f5181l_ge_eth_data);
> - orion5x_eth_switch_init(&rd88f5181l_ge_switch_plat_data,
> - gpio_to_irq(8));
> + orion5x_eth_switch_init(&rd88f5181l_ge_switch_plat_data);
> orion5x_i2c_init();
> orion5x_uart0_init();
>
> diff --git a/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c b/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c
> index 8ffaead76771..67ee8571b03c 100644
> --- a/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c
> +++ b/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c
> @@ -40,7 +40,7 @@ static struct dsa_chip_data rd88f6183ap_ge_switch_chip_data = {
> .port_names[5] = "cpu",
> };
>
> -static struct dsa_platform_data rd88f6183ap_ge_switch_plat_data = {
> +static struct dsa_platform_data __initdata rd88f6183ap_ge_switch_plat_data = {
> .nr_chips = 1,
> .chip = &rd88f6183ap_ge_switch_chip_data,
> };
> @@ -89,8 +89,7 @@ static void __init rd88f6183ap_ge_init(void)
> */
> orion5x_ehci0_init();
> orion5x_eth_init(&rd88f6183ap_ge_eth_data);
> - orion5x_eth_switch_init(&rd88f6183ap_ge_switch_plat_data,
> - gpio_to_irq(3));
> + orion5x_eth_switch_init(&rd88f6183ap_ge_switch_plat_data);
> spi_register_board_info(rd88f6183ap_ge_spi_slave_info,
> ARRAY_SIZE(rd88f6183ap_ge_spi_slave_info));
> orion5x_spi_init();
> diff --git a/arch/arm/mach-orion5x/wnr854t-setup.c b/arch/arm/mach-orion5x/wnr854t-setup.c
> index 4e1e5c8f6111..4dbcdbe1de7c 100644
> --- a/arch/arm/mach-orion5x/wnr854t-setup.c
> +++ b/arch/arm/mach-orion5x/wnr854t-setup.c
> @@ -106,7 +106,7 @@ static struct dsa_chip_data wnr854t_switch_chip_data = {
> .port_names[7] = "lan2",
> };
>
> -static struct dsa_platform_data wnr854t_switch_plat_data = {
> +static struct dsa_platform_data __initdata wnr854t_switch_plat_data = {
> .nr_chips = 1,
> .chip = &wnr854t_switch_chip_data,
> };
> @@ -124,7 +124,7 @@ static void __init wnr854t_init(void)
> * Configure peripherals.
> */
> orion5x_eth_init(&wnr854t_eth_data);
> - orion5x_eth_switch_init(&wnr854t_switch_plat_data, NO_IRQ);
> + orion5x_eth_switch_init(&wnr854t_switch_plat_data);
> orion5x_uart0_init();
>
> mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET,
> diff --git a/arch/arm/mach-orion5x/wrt350n-v2-setup.c b/arch/arm/mach-orion5x/wrt350n-v2-setup.c
> index 61e9027ef224..a6a8c4648d74 100644
> --- a/arch/arm/mach-orion5x/wrt350n-v2-setup.c
> +++ b/arch/arm/mach-orion5x/wrt350n-v2-setup.c
> @@ -191,7 +191,7 @@ static struct dsa_chip_data wrt350n_v2_switch_chip_data = {
> .port_names[7] = "lan4",
> };
>
> -static struct dsa_platform_data wrt350n_v2_switch_plat_data = {
> +static struct dsa_platform_data __initdata wrt350n_v2_switch_plat_data = {
> .nr_chips = 1,
> .chip = &wrt350n_v2_switch_chip_data,
> };
> @@ -210,7 +210,7 @@ static void __init wrt350n_v2_init(void)
> */
> orion5x_ehci0_init();
> orion5x_eth_init(&wrt350n_v2_eth_data);
> - orion5x_eth_switch_init(&wrt350n_v2_switch_plat_data, NO_IRQ);
> + orion5x_eth_switch_init(&wrt350n_v2_switch_plat_data);
> orion5x_uart0_init();
>
> mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET,
> diff --git a/arch/arm/plat-orion/common.c b/arch/arm/plat-orion/common.c
> index 7b9b70785a54..272f49b2c68f 100644
> --- a/arch/arm/plat-orion/common.c
> +++ b/arch/arm/plat-orion/common.c
> @@ -470,37 +470,15 @@ void __init orion_ge11_init(struct mv643xx_eth_platform_data *eth_data,
> /*****************************************************************************
> * Ethernet switch
> ****************************************************************************/
> -static struct resource orion_switch_resources[] = {
> - {
> - .start = 0,
> - .end = 0,
> - .flags = IORESOURCE_IRQ,
> - },
> -};
> -
> -static struct platform_device orion_switch_device = {
> - .name = "dsa",
> - .id = 0,
> - .num_resources = 0,
> - .resource = orion_switch_resources,
> -};
> -
> -void __init orion_ge00_switch_init(struct dsa_platform_data *d, int irq)
> +void __init orion_ge00_switch_init(struct dsa_platform_data *d)
> {
> int i;
>
> - if (irq != NO_IRQ) {
> - orion_switch_resources[0].start = irq;
> - orion_switch_resources[0].end = irq;
> - orion_switch_device.num_resources = 1;
> - }
> -
> d->netdev = &orion_ge00.dev;
> for (i = 0; i < d->nr_chips; i++)
> d->chip[i].host_dev = &orion_ge_mvmdio.dev;
> - orion_switch_device.dev.platform_data = d;
>
> - platform_device_register(&orion_switch_device);
> + platform_device_register_data(NULL, "dsa", 0, d, sizeof(d));
> }
>
> /*****************************************************************************
> diff --git a/arch/arm/plat-orion/include/plat/common.h b/arch/arm/plat-orion/include/plat/common.h
> index 8519727faa5e..9347f3c58a6d 100644
> --- a/arch/arm/plat-orion/include/plat/common.h
> +++ b/arch/arm/plat-orion/include/plat/common.h
> @@ -57,8 +57,7 @@ void __init orion_ge11_init(struct mv643xx_eth_platform_data *eth_data,
> unsigned long mapbase,
> unsigned long irq);
>
> -void __init orion_ge00_switch_init(struct dsa_platform_data *d,
> - int irq);
> +void __init orion_ge00_switch_init(struct dsa_platform_data *d);
>
> void __init orion_i2c_init(unsigned long mapbase,
> unsigned long irq,
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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