On Sat, Jun 25, 2016 at 06:15:15PM -0700, Stefan Agner wrote:
> Use the PMIC's repower capability for reboots. Register a restart
> handler and use a slightly elevated priority of 192 since the PMIC
> has suprior reset capability (causing a system wide reset).
>
> Signed-off-by: Stefan Agner <ste...@agner.ch>
> Reviewed-by: Marcel Ziswiler <marcel.ziswi...@toradex.com>
> ---
> drivers/mfd/rn5t618.c | 42 ++++++++++++++++++++++++++++++++++++------
> 1 file changed, 36 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/mfd/rn5t618.c b/drivers/mfd/rn5t618.c
> index 1831740..14f3b5f 100644
> --- a/drivers/mfd/rn5t618.c
> +++ b/drivers/mfd/rn5t618.c
> @@ -12,11 +12,13 @@
> * along with this program. If not, see <http://www.gnu.org/licenses/>.
> */
>
> +#include <linux/delay.h>
> #include <linux/i2c.h>
> #include <linux/mfd/core.h>
> #include <linux/mfd/rn5t618.h>
> #include <linux/module.h>
> #include <linux/of_device.h>
> +#include <linux/reboot.h>
> #include <linux/regmap.h>
>
> static const struct mfd_cell rn5t618_cells[] = {
> @@ -50,17 +52,37 @@ static const struct regmap_config rn5t618_regmap_config =
> {
> };
>
> static struct rn5t618 *rn5t618_pm_power_off;
> +static struct notifier_block rn5t618_restart_handler;
>
> -static void rn5t618_power_off(void)
> +static void rn5t618_trigger_poweroff_sequence(bool repower)
> {
> /* disable automatic repower-on */
> regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_REPCNT,
> - RN5T618_REPCNT_REPWRON, 0);
> + RN5T618_REPCNT_REPWRON, repower);
This only works because RN5T618_REPCNT_REPWRON happens to be BIT(0).
Better would be
RN5T618_REPCNT_REPWRON,
repower ? RN5T618_REPCNT_REPWRON : 0
Guenter
