diff options
| author | Dilip Kota <dkota@codeaurora.org> | 2017-12-14 20:51:19 +0530 |
|---|---|---|
| committer | Dilip Kota <dkota@codeaurora.org> | 2018-01-30 14:10:07 +0530 |
| commit | 4ac5f8ab03ae1616d2f6a96319cdec5230b334d0 (patch) | |
| tree | 897682397b9fa70e858fba09f0b3e1a324a52e5b /drivers/spi | |
| parent | 04b6b652ac86f10c6f22c7de575be5e4ebcc48ea (diff) | |
spi_qsd: Reset SPI core for transaction failure
Reset SPI core for transaction failure.
Remove the code configuring IO_CONTROL register
for SPI slave.
Change-Id: I3819269a9f2b7815ccfaf96713943eb04b36e137
Signed-off-by: Dilip Kota <dkota@codeaurora.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi_qsd.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/drivers/spi/spi_qsd.c b/drivers/spi/spi_qsd.c index 5c56001e36db..b8826b59ca23 100644 --- a/drivers/spi/spi_qsd.c +++ b/drivers/spi/spi_qsd.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2008-2017, The Linux Foundation. All rights reserved. +/* Copyright (c) 2008-2018, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -55,6 +55,7 @@ static int get_local_resources(struct msm_spi *dd); static void put_local_resources(struct msm_spi *dd); static void msm_spi_slv_setup(struct msm_spi *dd); static inline int msm_spi_wait_valid(struct msm_spi *dd); +static int reset_core(struct msm_spi *dd); static inline int msm_spi_configure_gsbi(struct msm_spi *dd, struct platform_device *pdev) @@ -1491,6 +1492,10 @@ static int msm_spi_process_transfer(struct msm_spi *dd) } } while (msm_spi_dma_send_next(dd)); + if (status && dd->pdata->is_slv_ctrl) { + if (reset_core(dd)) + dev_err(dd->dev, "Reset failed\n"); + } msm_spi_udelay(dd->xfrs_delay_usec); transfer_end: @@ -1578,14 +1583,15 @@ static int reset_core(struct msm_spi *dd) * bit. */ msm_spi_enable_error_flags(dd); - - spi_ioc = readl_relaxed(dd->base + SPI_IO_CONTROL); - spi_ioc |= SPI_IO_C_NO_TRI_STATE; - writel_relaxed(spi_ioc , dd->base + SPI_IO_CONTROL); - /* - * Ensure that the IO control is written to before returning. - */ - mb(); + if (!dd->pdata->is_slv_ctrl) { + spi_ioc = readl_relaxed(dd->base + SPI_IO_CONTROL); + spi_ioc |= SPI_IO_C_NO_TRI_STATE; + writel_relaxed(spi_ioc, dd->base + SPI_IO_CONTROL); + /* + * Ensure that the IO control is written to before returning. + */ + mb(); + } msm_spi_set_state(dd, SPI_OP_STATE_RESET); return 0; } @@ -2471,7 +2477,9 @@ static int init_resources(struct platform_device *pdev) */ msm_spi_enable_error_flags(dd); - writel_relaxed(SPI_IO_C_NO_TRI_STATE, dd->base + SPI_IO_CONTROL); + if (dd->pdata && !dd->pdata->is_slv_ctrl) + writel_relaxed(SPI_IO_C_NO_TRI_STATE, + dd->base + SPI_IO_CONTROL); rc = msm_spi_set_state(dd, SPI_OP_STATE_RESET); if (rc) goto err_spi_state; |