spi: stm32: always perform registers configuration prior to transfer (60ccb351) · Commits · 戴 / test

drivers/spi/spi-stm32.c

+17 −25

Original line number	Diff line number	Diff line
		@@ -1597,18 +1597,14 @@ static int stm32_spi_transfer_one_setup(struct stm32_spi *spi,
		unsigned long flags;
		unsigned int comm_type;
		int nb_words, ret = 0;
		int mbr;

		spin_lock_irqsave(&spi->lock, flags);

		spi->cur_xferlen = transfer->len;

		if (spi->cur_bpw != transfer->bits_per_word) {
		spi->cur_bpw = transfer->bits_per_word;
		spi->cfg->set_bpw(spi);
		}

		if (spi->cur_speed != transfer->speed_hz) {
		int mbr;

		/* Update spi->cur_speed with real clock speed */
		mbr = stm32_spi_prepare_mbr(spi, transfer->speed_hz,
		@@ -1621,17 +1617,13 @@ static int stm32_spi_transfer_one_setup(struct stm32_spi *spi,

		transfer->speed_hz = spi->cur_speed;
		stm32_spi_set_mbr(spi, mbr);
		}

		comm_type = stm32_spi_communication_type(spi_dev, transfer);
		if (spi->cur_comm != comm_type) {
		ret = spi->cfg->set_mode(spi, comm_type);

		if (ret < 0)
		goto out;

		spi->cur_comm = comm_type;
		}

		if (spi->cfg->set_data_idleness)
		spi->cfg->set_data_idleness(spi, transfer->len);