From: Jacek Anaszewski <jacek.anaszewski@gmail.com>
To: vishwanatha subbanna <vishwa@linux.vnet.ibm.com>,
Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>,
linux-leds@vger.kernel.org
Cc: OpenBMC Maillist <openbmc@lists.ozlabs.org>,
Eddie James <eajames@linux.ibm.com>
Subject: Re: [PATCH linux dev-5.10 06/35] ARM: dts: aspeed: rainier: Add leds that are off PCA9552
Date: Tue, 27 Apr 2021 23:22:43 +0200 [thread overview]
Message-ID: <babf3846-f1fd-d541-6c74-e5f167575105@gmail.com> (raw)
In-Reply-To: <4A5014B9-6152-41E0-B928-31C9380185EA@linux.vnet.ibm.com>
Hi Vishwanatha,
On 4/26/21 7:59 AM, vishwanatha subbanna wrote:
> Joel,
>
> With the experiments that I have done, I can not express LEDs with PCA955X_TYPE_LED predominantly because LEDs won’t
> retain states after the BMC reboot. I cooked a patch and tried but it does not work. I did an experiment where
> I put the patch and then did a reboot and saw that the LEDs were [OFF] in the very early stage of probe itself.
>
>>From a9fe9e956c624c15a455b88cc05262358519a541 Mon Sep 17 00:00:00 2001
> From: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
> Date: Fri, 23 Apr 2021 06:57:56 -0500
> Subject: [PATCH 1/2] leds: pca955x: Add support for default-state
>
> Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
> ---
> drivers/leds/leds-pca955x.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
> index bf7ead4..987415b 100644
> --- a/drivers/leds/leds-pca955x.c
> +++ b/drivers/leds/leds-pca955x.c
> @@ -130,6 +130,7 @@ struct pca955x_led {
> char name[32];
> u32 type;
> const char *default_trigger;
> + const char *default_state;
> };
>
> struct pca955x_platform_data {
> @@ -408,6 +409,8 @@ static int pca955x_gpio_direction_output(struct gpio_chip *gc,
> fwnode_property_read_u32(child, "type", &pdata->leds[reg].type);
> fwnode_property_read_string(child, "linux,default-trigger",
> &pdata->leds[reg].default_trigger);
> + fwnode_property_read_string(child, "default-state",
> + &pdata->leds[reg].default_state);
> }
>
> pdata->num_leds = chip->bits;
> @@ -520,8 +523,13 @@ static int pca955x_probe(struct i2c_client *client,
> if (err)
> return err;
>
> - /* Turn off LED */
> - err = pca955x_led_set(&pca955x_led->led_cdev, LED_OFF);
> + /* If the default-state is "keep", don't change states */
> + if (strcmp(pdata->leds[i].default_state, "keep")) {
> + if (!strcmp(pdata->leds[i].default_state, "on"))
> + err = pca955x_led_set(&pca955x_led->led_cdev, LED_ON);
> + else
> + err = pca955x_led_set(&pca955x_led->led_cdev, LED_OFF);
> + }
> if (err)
> return err;
> }
> —
> 1.8.3.1
>
>
> For `leds-gpio`, Andrew had put a patch, but I don’t see how that can be mapped to PCA955X. https://github.com/torvalds/linux/commit/f5808ac158f2b16b686a3d3c0879c5d6048aba14
>
> Jacek,
>
> Please could you help me here ?.. I need to express LEDs as PCA955X_TYPE_LED and also retain states post BMC reboot.
If in your setup the LED controller loses power on reboot then there
is nothing you can do to retain the state.
--
Best regards,
Jacek Anaszewski
next prev parent reply other threads:[~2021-04-27 21:23 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-08 22:53 [PATCH linux dev-5.10 00/35] Rainier and Everest system updates Eddie James
2021-03-08 22:53 ` [PATCH linux dev-5.10 01/35] ARM: dts: aspeed: rainier: Add Operator Panel LEDs Eddie James
2021-03-12 0:05 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 02/35] ARM: dts: aspeed: rainier: Add directly controlled LEDs Eddie James
2021-03-12 0:04 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 03/35] ARM: dts: aspeed: rainier: Add gpio-keys-polled for fans Eddie James
2021-03-12 0:06 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 04/35] ARM: dts: aspeed: rainier: Set MAX31785 config Eddie James
2021-03-12 0:07 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 05/35] ARM: dts: aspeed: rainier: Add additional processor CFAMs Eddie James
2021-03-12 0:07 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 06/35] ARM: dts: aspeed: rainier: Add leds that are off PCA9552 Eddie James
2021-03-12 0:09 ` Joel Stanley
2021-03-12 0:21 ` Milton Miller II
2021-03-12 0:30 ` Joel Stanley
[not found] ` <6ACEC474-8CFD-4BA9-B8FF-CCD41007AA67@linux.vnet.ibm.com>
2021-03-24 23:43 ` Joel Stanley
2021-04-26 5:59 ` vishwanatha subbanna
2021-04-27 21:22 ` Jacek Anaszewski [this message]
2021-03-08 22:53 ` [PATCH linux dev-5.10 07/35] ARM: dts: aspeed: rainier: Add leds that are off pic16f882 Eddie James
2021-03-12 0:10 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 08/35] ARM: dts: aspeed: rainier: Add leds on optional DASD cards Eddie James
2021-03-12 0:10 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 09/35] ARM: dts: aspeed: rainier: Add leds that are on optional PCI cable cards Eddie James
2021-03-12 0:11 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 10/35] ARM: dts: aspeed: rainier: Add presence GPIOs Eddie James
2021-03-12 0:14 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 11/35] ARM: dts: aspeed: rainier: Mark controllers as restricted Eddie James
2021-03-12 0:15 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 12/35] ARM: dts: aspeed: rainier 4U: Fix fan configuration Eddie James
2021-03-12 0:17 ` Joel Stanley
2021-03-08 22:53 ` [PATCH linux dev-5.10 13/35] dt: bindings: mmc: Add phase control properties for the Aspeed SDHCI Eddie James
2021-03-12 0:19 ` Joel Stanley
2021-04-12 3:21 ` Andrew Jeffery
2021-03-08 22:53 ` [PATCH linux dev-5.10 14/35] mmc: sdhci: aspeed: Expose data sample phase delay tuning Eddie James
2021-03-08 22:53 ` [PATCH linux dev-5.10 15/35] ARM: dts: aspeed: tacoma: Add data sample phase delay for eMMC Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 16/35] ARM: dts: aspeed: tacoma: Remove CFAM reset GPIO Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 17/35] ARM: dts: aspeed: Everest: Add I2C components Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 18/35] ARM: dts: Aspeed: Everest: Add max31785 fan controller device Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 19/35] ARM: dts: Aspeed: Everest: Add FSI CFAMs and re-number engines Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 20/35] ARM: dts: Aspeed: Everest: Add pca9552 fan presence Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 21/35] ARM: dts: aspeed: everest: Add power supply i2c devices Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 22/35] ARM: dts: aspeed: everest: Add UCD90320 power sequencer Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 23/35] ARM: dts: aspeed: everest: GPIOs support Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 24/35] ARM: dts: Aspeed: Everest: Add RTC Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 25/35] ARM: dts: aspeed: rainier: Support pass 2 planar Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 26/35] fsi: scom: Handle FSI2PIB timeout Eddie James
2021-03-12 0:20 ` Joel Stanley
2021-03-08 22:54 ` [PATCH linux dev-5.10 27/35] net/ncsi: Avoid channel_monitor hrtimer deadlock Eddie James
2021-03-12 0:35 ` Joel Stanley
2021-03-08 22:54 ` [PATCH linux dev-5.10 28/35] ftgmac100: Restart MAC HW once Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 29/35] hwmon: (pmbus) Add a PMBUS_NO_CAPABILITY platform data flag Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 30/35] hwmon: (pmbus/ibm-cffps) Set the PMBUS_NO_CAPABILITY flag Eddie James
2021-03-12 0:23 ` Joel Stanley
2021-03-08 22:54 ` [PATCH linux dev-5.10 31/35] i2c: Allow throttling of transfers to client devices Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 32/35] pmbus: (ucd9000) Throttle SMBus transfers to avoid poor behaviour Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 33/35] pmbus: (core) Add a one-shot retry in pmbus_set_page() Eddie James
2021-03-09 20:21 ` Andrei Kartashev
2021-03-12 0:35 ` Joel Stanley
2021-03-08 22:54 ` [PATCH linux dev-5.10 34/35] pmbus: (max31785) Add a local pmbus_set_page() implementation Eddie James
2021-03-08 22:54 ` [PATCH linux dev-5.10 35/35] pmbus: (max31785) Retry enabling fans after writing MFR_FAN_CONFIG Eddie James
2021-03-12 0:37 ` [PATCH linux dev-5.10 00/35] Rainier and Everest system updates Joel Stanley
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