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Date: Fri, 24 Aug 2012 16:27:14 +0200
From: Philippe LANGLAIS <philippe.langlais@...com>
To: Lee Jones <lee.jones@...aro.org>
Cc: "linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
STEricsson_nomadik_linux <STEricsson_nomadik_linux@...t.st.com>,
Linus WALLEIJ <linus.walleij@...ricsson.com>,
"arnd@...db.de" <arnd@...db.de>
Subject: Re: [PATCH 1/1 v2] ARM: ux500: Provide SMSC911x fixed-regulator
when not booting DT
On 08/24/2012 04:08 PM, Lee Jones wrote:
>> I have checked in Snowball schematics and I can confirm that the fixed
>> 3.3V regulator is GPIO26 on AB8500 not DB8500, so its numero is
>> MOP500_AB8500_PIN_GPIO(26)
> We're also using GPIO26 on the DB8500 in the Device Tree solution.
> Odd that is should work? I wonder if we're just getting lucky, or if
> it's just not required?
Yes, we are lucky that the AB8500 GPIO26 is in the right state to make
the ethernet working
and changing the state of GPIO26 doesn't seems to break something on
Snowball.
>
>> and you have first to update the upstream gpio-ab8500 driver.
> I see. Do you know what needs to be updated to get it working?
I can't remember exactly, changes have been done recently on the
internal driver and I know that the upstream driver is BROKEN (use
obsolete IRQ API).
>
>> On 08/24/2012 02:48 PM, Lee Jones wrote:
>>> The SMSC911x Ethernet chip requires a fixed-regulator in order to
>>> function correctly. We have previously provided a means to obtain
>>> this during a Device Tree boot, however nothing has been put into
>>> place when booting with a non-DT kernel. This patch aims to change
>>> that.
>>>
>>> Signed-off-by: Lee Jones <lee.jones@...aro.org>
>>> ---
>>> arch/arm/mach-ux500/board-mop500-regulators.c | 17 +++++++++++++++++
>>> arch/arm/mach-ux500/board-mop500-regulators.h | 1 +
>>> arch/arm/mach-ux500/board-mop500.c | 21 +++++++++++++++++++++
>>> arch/arm/mach-ux500/board-mop500.h | 2 +-
>>> 4 files changed, 40 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/arch/arm/mach-ux500/board-mop500-regulators.c b/arch/arm/mach-ux500/board-mop500-regulators.c
>>> index 52426a4..139f31e 100644
>>> --- a/arch/arm/mach-ux500/board-mop500-regulators.c
>>> +++ b/arch/arm/mach-ux500/board-mop500-regulators.c
>>> @@ -13,6 +13,23 @@
>>> #include <linux/regulator/ab8500.h>
>>> #include "board-mop500-regulators.h"
>>>
>>> +#ifdef CONFIG_REGULATOR_FIXED_VOLTAGE
>>> +static struct regulator_consumer_supply gpio_en_3v3_consumers[] = {
>>> + REGULATOR_SUPPLY("vdd33a", "smsc911x.0"),
>>> +};
>>> +
>>> +struct regulator_init_data gpio_en_3v3_regulator = {
>>> + .constraints = {
>>> + .name = "EN-3V3",
>>> + .min_uV = 3300000,
>>> + .max_uV = 3300000,
>>> + .valid_ops_mask = REGULATOR_CHANGE_STATUS,
>>> + },
>>> + .num_consumer_supplies = ARRAY_SIZE(gpio_en_3v3_consumers),
>>> + .consumer_supplies = gpio_en_3v3_consumers,
>>> +};
>>> +#endif
>>> +
>>> /*
>>> * TPS61052 regulator
>>> */
>>> diff --git a/arch/arm/mach-ux500/board-mop500-regulators.h b/arch/arm/mach-ux500/board-mop500-regulators.h
>>> index 9499215..78a0642 100644
>>> --- a/arch/arm/mach-ux500/board-mop500-regulators.h
>>> +++ b/arch/arm/mach-ux500/board-mop500-regulators.h
>>> @@ -18,5 +18,6 @@ extern struct ab8500_regulator_reg_init
>>> ab8500_regulator_reg_init[AB8500_NUM_REGULATOR_REGISTERS];
>>> extern struct regulator_init_data ab8500_regulators[AB8500_NUM_REGULATORS];
>>> extern struct regulator_init_data tps61052_regulator;
>>> +extern struct regulator_init_data gpio_en_3v3_regulator;
>>>
>>> #endif
>>> diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
>>> index 42e1759..c7f0973 100644
>>> --- a/arch/arm/mach-ux500/board-mop500.c
>>> +++ b/arch/arm/mach-ux500/board-mop500.c
>>> @@ -23,6 +23,7 @@
>>> #include <linux/spi/spi.h>
>>> #include <linux/mfd/abx500/ab8500.h>
>>> #include <linux/regulator/ab8500.h>
>>> +#include <linux/regulator/fixed.h>
>>> #include <linux/mfd/tc3589x.h>
>>> #include <linux/mfd/tps6105x.h>
>>> #include <linux/mfd/abx500/ab8500-gpio.h>
>>> @@ -75,6 +76,25 @@ static struct platform_device snowball_led_dev = {
>>> },
>>> };
>>>
>>> +#ifdef CONFIG_REGULATOR_FIXED_VOLTAGE
>>> +static struct fixed_voltage_config snowball_gpio_en_3v3_data = {
>>> + .supply_name = "EN-3V3",
>>> + .gpio = SNOWBALL_EN_3V3_ETH_GPIO,
>>> + .microvolts = 3300000,
>>> + .enable_high = 1,
>>> + .init_data = &gpio_en_3v3_regulator,
>>> + .startup_delay = 5000, /* 1200us */
>>> +};
>>> +
>>> +static struct platform_device snowball_gpio_en_3v3_regulator_dev = {
>>> + .name = "reg-fixed-voltage",
>>> + .id = 1,
>>> + .dev = {
>>> + .platform_data = &snowball_gpio_en_3v3_data,
>>> + },
>>> +};
>>> +#endif
>>> +
>>> static struct ab8500_gpio_platform_data ab8500_gpio_pdata = {
>>> .gpio_base = MOP500_AB8500_PIN_GPIO(1),
>>> .irq_base = MOP500_AB8500_VIR_GPIO_IRQ_BASE,
>>> @@ -585,6 +605,7 @@ static struct platform_device *snowball_platform_devs[] __initdata = {
>>> &snowball_led_dev,
>>> &snowball_key_dev,
>>> &snowball_sbnet_dev,
>>> + &snowball_gpio_en_3v3_regulator_dev,
>>> };
>>>
>>> static void __init mop500_init_machine(void)
>>> diff --git a/arch/arm/mach-ux500/board-mop500.h b/arch/arm/mach-ux500/board-mop500.h
>>> index 9e9dd5a..d3a02d5 100644
>>> --- a/arch/arm/mach-ux500/board-mop500.h
>>> +++ b/arch/arm/mach-ux500/board-mop500.h
>>> @@ -13,6 +13,7 @@
>>> #include <linux/amba/mmci.h>
>>>
>>> /* Snowball specific GPIO assignments, this board has no GPIO expander */
>>> +#define SNOWBALL_EN_3V3_ETH_GPIO 26
>> No it's MOP500_AB8500_PIN_GPIO(26)
>>> #define SNOWBALL_ACCEL_INT1_GPIO 163
>>> #define SNOWBALL_ACCEL_INT2_GPIO 164
>>> #define SNOWBALL_MAGNET_DRDY_GPIO 165
>>> @@ -76,7 +77,6 @@
>>> #define SNOWBALL_PM_GPIO4_GPIO MOP500_AB8500_PIN_GPIO(4) /* SYSCLKREQ6/GPIO4 */
>>> #define SNOWBALL_EN_3V6_GPIO MOP500_AB8500_PIN_GPIO(16) /* PWMOUT3/GPIO16 */
>>> #define SNOWBALL_PME_ETH_GPIO MOP500_AB8500_PIN_GPIO(24) /* SYSCLKREQ7/GPIO24 */
>>> -#define SNOWBALL_EN_3V3_ETH_GPIO MOP500_AB8500_PIN_GPIO(26) /* GPIO26 */
>> keep this line
>>>
>>> struct device;
>>> struct i2c_board_info;
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