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Commit b7c08cf8 authored by Jarkko Nikula's avatar Jarkko Nikula Committed by Mark Brown
Browse files

spi: pxa2xx: Add support for Intel Broxton 



LPSS SPI in Intel Broxton is otherwise the same than in Intel Sunrisepoint
but it supports up to four chip selects per port and has different FIFO
thresholds. Patch adds support for two Broxton SoC variants.

Signed-off-by: default avatarJarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 8b136baa

drivers/spi/spi-pxa2xx.c

+20 −0
Original line number Diff line number Diff line
@@ -116,6 +116,16 @@ static const struct lpss_config lpss_platforms[] = { 
		.tx_threshold_lo = 32,

		.tx_threshold_hi = 56,

	},

	{	/* LPSS_BXT_SSP */

		.offset = 0x200,

		.reg_general = -1,

		.reg_ssp = 0x20,

		.reg_cs_ctrl = 0x24,

		.reg_capabilities = 0xfc,

		.rx_threshold = 1,

		.tx_threshold_lo = 16,

		.tx_threshold_hi = 48,

	},

};



static inline const struct lpss_config
@@ -130,6 +140,7 @@ static bool is_lpss_ssp(const struct driver_data *drv_data) 
	case LPSS_LPT_SSP:

	case LPSS_BYT_SSP:

	case LPSS_SPT_SSP:

	case LPSS_BXT_SSP:

		return true;

	default:

		return false;
@@ -1152,6 +1163,7 @@ static int setup(struct spi_device *spi) 
	case LPSS_LPT_SSP:

	case LPSS_BYT_SSP:

	case LPSS_SPT_SSP:

	case LPSS_BXT_SSP:

		config = lpss_get_config(drv_data);

		tx_thres = config->tx_threshold_lo;

		tx_hi_thres = config->tx_threshold_hi;
@@ -1313,6 +1325,14 @@ static const struct pci_device_id pxa2xx_spi_pci_compound_match[] = { 
	/* SPT-H */

	{ PCI_VDEVICE(INTEL, 0xa129), LPSS_SPT_SSP },

	{ PCI_VDEVICE(INTEL, 0xa12a), LPSS_SPT_SSP },

	/* BXT */

	{ PCI_VDEVICE(INTEL, 0x0ac2), LPSS_BXT_SSP },

	{ PCI_VDEVICE(INTEL, 0x0ac4), LPSS_BXT_SSP },

	{ PCI_VDEVICE(INTEL, 0x0ac6), LPSS_BXT_SSP },

	/* APL */

	{ PCI_VDEVICE(INTEL, 0x5ac2), LPSS_BXT_SSP },

	{ PCI_VDEVICE(INTEL, 0x5ac4), LPSS_BXT_SSP },

	{ PCI_VDEVICE(INTEL, 0x5ac6), LPSS_BXT_SSP },

	{ },

};

include/linux/pxa2xx_ssp.h

+1 −0
Original line number Diff line number Diff line
@@ -198,6 +198,7 @@ enum pxa_ssp_type { 
	LPSS_LPT_SSP, /* Keep LPSS types sorted with lpss_platforms[] */

	LPSS_BYT_SSP,

	LPSS_SPT_SSP,

	LPSS_BXT_SSP,

};



struct ssp_device {