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Message-ID: <3683516.te4PblbMyt@wuerfel>
Date: Thu, 08 Sep 2016 17:20:21 +0200
From: Arnd Bergmann <arnd@...db.de>
To: linux-arm-kernel@...ts.infradead.org
Cc: Andrew Lunn <andrew@...n.ch>, Jason Cooper <jason@...edaemon.net>,
Russell King <linux@...linux.org.uk>,
linux-kernel@...r.kernel.org,
Gregory Clement <gregory.clement@...e-electrons.com>,
Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Subject: Re: [PATCH 3/4] ARM: orion5x: avoid NO_IRQ in orion_ge00_switch_init
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>
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,
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