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drivers/rpmsg_port_spi_slave: unbind spictrl when peer shutdown

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Unbind the spictrl to close the spi controller, and bind it again
when peer boots.
This can help to reduce the leak current caused by the spi gpio.

Signed-off-by: liaoao <liaoao@xiaomi.com>
This commit is contained in:
liaoao 2025-02-27 15:18:40 +08:00 • committed by Xiang Xiao
parent fa947f95ee
commit a52dc0e785
1 changed files with 14 additions and 0 deletions
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14
drivers/rpmsg/rpmsg_port_spi_slave.c
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@ -83,6 +83,7 @@ struct rpmsg_port_spi_s
FAR struct spi_slave_ctrlr_s *spictrlr;
struct spi_slave_dev_s spislv;
FAR struct ioexpander_dev_s *ioe;
bool bound;
/* GPIOs used for handshake */
@ -92,6 +93,7 @@ struct rpmsg_port_spi_s
/* SPI devices' configuration */
int nbits;
int mode;
/* Reserved for cmd send */
@ -542,6 +544,14 @@ static int rpmsg_port_spi_mreq_handler(FAR struct ioexpander_dev_s *dev,
FAR struct rpmsg_port_spi_s *rpspi = arg;
rpmsginfo("received a mreq\n");
if (!rpspi->bound)
{
SPIS_CTRLR_BIND(rpspi->spictrlr, &rpspi->spislv,
rpspi->mode, rpspi->nbits);
rpspi->bound = true;
}
rpmsg_port_spi_exchange(rpspi);
return 0;
}
@ -612,6 +622,8 @@ rpmsg_port_spi_process_packet(FAR struct rpmsg_port_spi_s *rpspi,
flags = spin_lock_irqsave(&rpspi->lock);
if (rpspi->state == RPMSG_PORT_SPI_STATE_DISCONNECTING)
{
SPIS_CTRLR_UNBIND(rpspi->spictrlr);
rpspi->bound = false;
rpspi->state = RPMSG_PORT_SPI_STATE_UNCONNECTED;
spin_unlock_irqrestore(&rpspi->lock, flags);
IOEXP_WRITEPIN(rpspi->ioe, rpspi->sreq, 0);
@ -752,7 +764,9 @@ rpmsg_port_spi_init_hardware(FAR struct rpmsg_port_spi_s *rpspi,
rpspi->spictrlr = spictrlr;
rpspi->spislv.ops = &g_rpmsg_port_spi_slave_ops;
rpspi->nbits = spicfg->nbits;
rpspi->mode = spicfg->mode;
SPIS_CTRLR_BIND(spictrlr, &rpspi->spislv, spicfg->mode, spicfg->nbits);
rpspi->bound = true;
return 0;
}