diff options
Diffstat (limited to 'drivers/spi/spi-pxa2xx.c')
| -rw-r--r-- | drivers/spi/spi-pxa2xx.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index 298a0bec29d1..fc7ab4b26880 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1,16 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs * Copyright (C) 2013, Intel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/bitops.h> @@ -1446,6 +1437,10 @@ static const struct pci_device_id pxa2xx_spi_pci_compound_match[] = { { PCI_VDEVICE(INTEL, 0x34aa), LPSS_CNL_SSP }, { PCI_VDEVICE(INTEL, 0x34ab), LPSS_CNL_SSP }, { PCI_VDEVICE(INTEL, 0x34fb), LPSS_CNL_SSP }, + /* EHL */ + { PCI_VDEVICE(INTEL, 0x4b2a), LPSS_BXT_SSP }, + { PCI_VDEVICE(INTEL, 0x4b2b), LPSS_BXT_SSP }, + { PCI_VDEVICE(INTEL, 0x4b37), LPSS_BXT_SSP }, /* APL */ { PCI_VDEVICE(INTEL, 0x5ac2), LPSS_BXT_SSP }, { PCI_VDEVICE(INTEL, 0x5ac4), LPSS_BXT_SSP }, @@ -1713,6 +1708,16 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) goto out_error_dma_irq_alloc; controller->max_speed_hz = clk_get_rate(ssp->clk); + /* + * Set minimum speed for all other platforms than Intel Quark which is + * able do under 1 Hz transfers. + */ + if (!pxa25x_ssp_comp(drv_data)) + controller->min_speed_hz = + DIV_ROUND_UP(controller->max_speed_hz, 4096); + else if (!is_quark_x1000_ssp(drv_data)) + controller->min_speed_hz = + DIV_ROUND_UP(controller->max_speed_hz, 512); /* Load default SSP configuration */ pxa2xx_spi_write(drv_data, SSCR0, 0); |