[PATCH v2] Cubieboard2:SUN7I:Add LED BOOT support
Andre Przywara
andre.przywara at arm.com
Thu Dec 9 12:24:10 CET 2021
On Thu, 9 Dec 2021 14:38:08 +0330
Javad Rahimi <javad321javad at gmail.com> wrote:
Hi Javad,
> On Thu, Dec 9, 2021 at 6:24 AM Javad Rahimi <javad321javad at gmail.com> wrote:
> >
> > On Wed, Dec 8, 2021 at 9:13 PM Andre Przywara <andre.przywara at arm.com> wrote:
> > >
> > > On Wed, 8 Dec 2021 20:48:54 +0330
> > > Javad Rahimi <javad321javad at gmail.com> wrote:
> > >
> > > > On Wed, Dec 8, 2021 at 8:33 PM Andre Przywara <andre.przywara at arm.com> wrote:
> > > > >
> > > > > On Wed, 8 Dec 2021 19:14:22 +0330
> > > > > Javad Rahimi <javad321javad at gmail.com> wrote:
> > > > >
> > > > > > On Wed, Dec 8, 2021 at 6:05 PM Andre Przywara <andre.przywara at arm.com> wrote:
> > > > > > >
> > > > > > > On Wed, 8 Dec 2021 15:25:54 +0100
> > > > > > > Frank Wunderlich <frank-w at public-files.de> wrote:
> > > > > > >
> > > > > > > Hi,
> > > > > > >
> > > > > > > > you should add maintainer email for your patch
> > > > > > > >
> > > > > > > > $ scripts/get_maintainer.pl board/sunxi/board.c
> > > > > > > > Jagan Teki <jagan at amarulasolutions.com> (maintainer:ARM SUNXI)
> > > > > > > > Andre Przywara <andre.przywara at arm.com> (maintainer:ARM SUNXI)
> > > > > > > > u-boot at lists.denx.de (open list)
> > > > > > >
> > > > > > > Thanks Frank!
> > > > > > >
> > > > > > > > > Gesendet: Mittwoch, 08. Dezember 2021 um 15:22 Uhr
> > > > > > > > > Von: "Javad Rahimi" <javad321javad at gmail.com>
> > > > > > > > > An: u-boot at lists.denx.de
> > > > > > > > > Cc: "Javad Rahimi" <javad321javad at gmail.com>
> > > > > > > > > Betreff: [PATCH v2] Cubieboard2:SUN7I:Add LED BOOT support
> > > > > > > > >
> > > > > > > > > This feature makes it possible to assign one of
> > > > > > > > > LED1(PH20) and LED2(PH21) to BOOT process LED.
> > > > > > > > > User should activates the "Enable status LED API" in
> > > > > > > > > "Device Drivers -> LED Support"
> > > > > > >
> > > > > > > Please have a look at the current pinephone_defconfig, because that uses
> > > > > > > the boot LED already in a much easier fashion:
> > > > > > > https://source.denx.de/u-boot/u-boot/-/commit/0534153fd1
> > > > > > >
> > > > > > > Cheers,
> > > > > > > Andre
> > > > > > >
> > > > > > Hi Andre,
> > > > > > Thanks for your comments. I studied the pinephone_defconfig.
> > > > > > By default, when activating the same options on Cubieboard2_defconfig
> > > > > > it shows linker error for `__led_init` and `__led_set`.
> > > > > > In other words, they are not defined. So, in this patch, I added the
> > > > > > implementation for these functions for this board.
> > > > >
> > > > > Did you add the:
> > > > > CONFIG_SPL_DRIVERS_MISC=y
> > > > > line as well? And re-ran make Cubieboard2_defconfig?
> > > > > Because that seemed to work for me.
> > > > >
> > > > > Cheers,
> > > > > Andre
> > > > >
> > > > >
> > > > When I add CONFIG_SPL_DRIVERS_MISC=y
> > > > By flashing SD card and turning on the board, It freezes in this step:
> > > > ```
> > > > U-Boot SPL 2022.01-rc3-00025-gf570594bc9-dirty (Dec 08 2021 - 20:36:51 +0330)
> > > > ```
> > > > -----------------------------------------
> > > > The customized defconfig file for Cubieboard:
> > > > ```
> > > > CONFIG_ARM=y
> > > > CONFIG_ARCH_SUNXI=y
> > > > CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-cubieboard2"
> > > > CONFIG_SPL_DRIVERS_MISC=y
> > > > CONFIG_SPL=y
> > > > CONFIG_MACH_SUN7I=y
> > > > CONFIG_DRAM_CLK=480
> > > > CONFIG_MMC0_CD_PIN="PH1"
> > > > CONFIG_SATAPWR="PB8"
> > > > CONFIG_AHCI=y
> > > > # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
> > > > CONFIG_SPL_I2C=y
> > > > CONFIG_SCSI_AHCI=y
> > > > CONFIG_SYS_I2C_MVTWSI=y
> > > > CONFIG_SYS_I2C_SLAVE=0x7f
> > > > CONFIG_SYS_I2C_SPEED=400000
> > > > CONFIG_PHY_REALTEK=y
> > > > CONFIG_ETH_DESIGNWARE=y
> > > > CONFIG_MII=y
> > > > CONFIG_SUN7I_GMAC=y
> > > > CONFIG_SCSI=y
> > > > CONFIG_USB_EHCI_HCD=y
> > > > CONFIG_USB_OHCI_HCD=y
> > > > CONFIG_LED_STATUS=y
> > > > CONFIG_LED_STATUS_GPIO=y
> > > > CONFIG_LED_STATUS0=y
> > > > CONFIG_LED_STATUS_BIT=114
> > >
> > > This is the GPIO number, you need to adjust this to point to the pin your
> > > LED is connected to. PH20 would be 244, for instance:
> > > ('H' - 'A') * 32 + 20
> > >
> > > Cheers,
> > > Andre
> > >
> > Thanks,
> > Now the LED is ON, but the loader still freezes in (SPL, I think)
> > ```
> > U-Boot SPL 2022.01-rc3-00025-gf570594bc9-dirty (Dec 09 2021 - 06:19:40 +0330)
> > ```
> > Best Regards,
> > Javad
> Hi Andre,
> The freeze problem solved when I placed `status_led_init` function
> after
> gd->ram_size = sunxi_dram_init();
> When it is called before sunxi_dram_init(), the bootloader freezes.
That's probably our old friend .bss in SPL again: To save precious SRAM
space, we place the BSS section in DRAM, so it's only available after the
DRAM init happened. So far the code that runs before DRAM init is not using
variables placed in BSS, so everything works. Possible solutions are:
1) see if we can get rid of BSS variables in the LED code (my bet is on
"static int status_led_init_done = 0;" as the culprit)
2) move the LED init after the DRAM init. That's probably a bit late,
though, depends a bit on what people expect from the boot LED.
3) I guess the A20 can afford BSS in SRAM, but that would not help with
other (64-bit) boards. I actually wonder how it works there, though?
I'd prefer 1), but 2) is surely easier.
Cheers,
Andre
>
> Best Regards,
> Javad
> > > > CONFIG_LED_STATUS_STATE=2
> > > > ```
> > > > Best Regards,
> > > > Javad
> > > > > > > > >
> > > > > > > > > Signed-off-by: Javad Rahimi <javad321javad at gmail.com>
> > > > > > > > > ---
> > > > > > > > > This is my first contributation in open source world.
> > > > > > > > > I'm sorry if I have mistakes in my commits and versioning.
> > > > > > > > > I do my best to learn fast.
> > > > > > > > >
> > > > > > > > > Changes in v2:
> > > > > > > > > - Missed braces added
> > > > > > > > > - Unnecessary debug removed
> > > > > > > > > - Some typo fixed
> > > > > > > > >
> > > > > > > > > board/sunxi/board.c | 49 +++++++++++++++++++++++++++++++++++++++++++++
> > > > > > > > > 1 file changed, 49 insertions(+)
> > > > > > > > >
> > > > > > > > > diff --git a/board/sunxi/board.c b/board/sunxi/board.c
> > > > > > > > > index 4f5747c34a..5e2f6ae902 100644
> > > > > > > > > --- a/board/sunxi/board.c
> > > > > > > > > +++ b/board/sunxi/board.c
> > > > > > > > > @@ -1002,3 +1002,52 @@ int board_fit_config_name_match(const char *name)
> > > > > > > > > return ret;
> > > > > > > > > }
> > > > > > > > > #endif
> > > > > > > > > +
> > > > > > > > > +#if defined(CONFIG_LED_STATUS) && defined(CONFIG_LED_STATUS_BOOT) && defined(CONFIG_LED_STATUS_BOARD_SPECIFIC)
> > > > > > > > > +
> > > > > > > > > +#define CUBIE2_LED_BOOT_GPIO "PH20"
> > > > > > > > > +static int gpio_boot_led;
> > > > > > > > > +
> > > > > > > > > +void __led_init(led_id_t mask, int state)
> > > > > > > > > +{
> > > > > > > > > + int ret;
> > > > > > > > > +
> > > > > > > > > + if (mask != CONFIG_LED_STATUS_BOOT)
> > > > > > > > > + return;
> > > > > > > > > +
> > > > > > > > > + ret = gpio_lookup_name(CUBIE2_LED_BOOT_GPIO, NULL, NULL, &gpio_boot_led);
> > > > > > > > > +
> > > > > > > > > + if (ret)
> > > > > > > > > + return;
> > > > > > > > > +
> > > > > > > > > + ret = gpio_request(gpio_boot_led, "boot_led");
> > > > > > > > > + if (ret == -1) {
> > > > > > > > > + debug("[gpio_request] Error:%d\n", ret);
> > > > > > > > > + return;
> > > > > > > > > + }
> > > > > > > > > +
> > > > > > > > > + ret = gpio_direction_output(gpio_boot_led, 1);
> > > > > > > > > + if (ret == -1) {
> > > > > > > > > + debug("[gpio_direction_output] Error:%d\n", ret);
> > > > > > > > > + return;
> > > > > > > > > + }
> > > > > > > > > + __led_set(mask, state);
> > > > > > > > > +}
> > > > > > > > > +
> > > > > > > > > +void __led_set(led_id_t mask, int state)
> > > > > > > > > +{
> > > > > > > > > + if (mask != CONFIG_LED_STATUS_BOOT)
> > > > > > > > > + return;
> > > > > > > > > +
> > > > > > > > > + gpio_set_value(gpio_boot_led, state);
> > > > > > > > > +}
> > > > > > > > > +
> > > > > > > > > +void __led_toggle(led_id_t mask)
> > > > > > > > > +{
> > > > > > > > > + if (mask != CONFIG_LED_STATUS_BOOT)
> > > > > > > > > + return;
> > > > > > > > > +
> > > > > > > > > + gpio_set_value(gpio_boot_led, !gpio_get_value(gpio_boot_led));
> > > > > > > > > +}
> > > > > > > > > +
> > > > > > > > > +#endif
> > > > > > > > > --
> > > > > > > > > 2.25.1
> > > > > > > > >
> > > > > > > > >
> > > > > > >
> > > > >
> > >
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