On 04/29/2015 07:57 PM, Lee Jones wrote: > On Wed, 29 Apr 2015, Shobhit Kumar wrote: > >> On some Intel SoC platforms, the panel enable/disable signals are >> controlled by CRC PMIC. Add those control as a new GPIO in a lookup >> table for gpio-crystalcove chip during CRC driver load >> >> v2: Make the lookup table static (Thierry) >> Remove the lookup table during driver remove (Thierry) >> >> CC: Samuel Ortiz <[email protected]> >> Cc: Linus Walleij <[email protected]> >> Cc: Alexandre Courbot <[email protected]> >> Cc: Thierry Reding <[email protected]> >> Signed-off-by: Shobhit Kumar <[email protected]> >> --- >> drivers/mfd/intel_soc_pmic_core.c | 17 +++++++++++++++++ >> 1 file changed, 17 insertions(+) > > I have no idea what this stuff is, but it looks plausible.
The CRC PMIC controls the panel enable/disable signal using one of GPIO like lines. It was agreed by Linus Walleij to go this way. The matching crystalcove gpio changes are already merged in Linux next as - http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=e189ca56d91bbf1d3fe2f88ab6858bf919d42adf This just adds a consumer lookup table for the gpio. Since we do not have a DT or board files, and since this was part of CRC driver, just added the lookup table during CRC driver load itself. Same is done for PWM in a later patch. Regards Shobhit > > For my own reference: > Acked-by: Lee Jones <[email protected]> > >> diff --git a/drivers/mfd/intel_soc_pmic_core.c >> b/drivers/mfd/intel_soc_pmic_core.c >> index 7b50b6b..f3d918e 100644 >> --- a/drivers/mfd/intel_soc_pmic_core.c >> +++ b/drivers/mfd/intel_soc_pmic_core.c >> @@ -24,8 +24,19 @@ >> #include <linux/acpi.h> >> #include <linux/regmap.h> >> #include <linux/mfd/intel_soc_pmic.h> >> +#include <linux/gpio/machine.h> >> #include "intel_soc_pmic_core.h" >> >> +/* Lookup table for the Panel Enable/Disable line as GPIO signals */ >> +static struct gpiod_lookup_table panel_gpio_table = { >> + /* Intel GFX is consumer */ >> + .dev_id = "0000:00:02.0", >> + .table = { >> + /* Panel EN/DISABLE */ >> + GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH), >> + }, >> +}; >> + >> static int intel_soc_pmic_find_gpio_irq(struct device *dev) >> { >> struct gpio_desc *desc; >> @@ -85,6 +96,9 @@ static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c, >> if (ret) >> dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret); >> >> + /* Add lookup table binding for Panel Control to the GPIO Chip */ >> + gpiod_add_lookup_table(&panel_gpio_table); >> + >> ret = mfd_add_devices(dev, -1, config->cell_dev, >> config->n_cell_devs, NULL, 0, >> regmap_irq_get_domain(pmic->irq_chip_data)); >> @@ -104,6 +118,9 @@ static int intel_soc_pmic_i2c_remove(struct i2c_client >> *i2c) >> >> regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data); >> >> + /* Remove lookup table for Panel Control from the GPIO Chip */ >> + gpiod_remove_lookup_table(&panel_gpio_table); >> + >> mfd_remove_devices(&i2c->dev); >> >> return 0; > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
