soc: qcom: bgcom: prevent BG status checking while SPI is busy



Stops any transaction which try to resume BG while SPI is held
by TZ.

Change-Id: I45c5d4dcc9ab094f63742d7ca3f82b12a2fdae4a
Signed-off-by: Arjun Singh <arsingh@codeaurora.org>
Signed-off-by: Ramesh Yadav Javadi <javadi@codeaurora.org>

parent 7bcb1bb4

drivers/soc/qcom/bgcom_spi.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -749,11 +749,18 @@ static int is_bg_resume(void *handle)
		uint8_t rx_buf[8] = {0};
		uint32_t cmnd_reg = 0;

		if (spi_state == BGCOM_SPI_BUSY) {
		printk_ratelimited("SPI is held by TZ\n");
		goto ret_err;
		}

		txn_len = 0x08;
		tx_buf[0] = 0x05;
		ret = bgcom_transfer(handle, tx_buf, rx_buf, txn_len);
		if (!ret)
		memcpy(&cmnd_reg, rx_buf+BG_SPI_READ_LEN, 0x04);

		ret_err:
		return cmnd_reg & BIT(31);
		}