Merge remote-tracking branches 'spi/topic/mxs', 'spi/topic/pxa',...

Merge remote-tracking branches 'spi/topic/mxs', 'spi/topic/pxa', 'spi/topic/rockchip', 'spi/topic/samsung' and 'spi/topic/sirf' into spi-next

Documentation/devicetree/bindings/spi/spi-samsung.txt

@@ -9,7 +9,7 @@ Required SoC Specific Properties:
     - samsung,s3c2443-spi: for s3c2443, s3c2416 and s3c2450 platforms
     - samsung,s3c6410-spi: for s3c6410 platforms
     - samsung,s5pv210-spi: for s5pv210 and s5pc110 platforms
-    - samsung,exynos4210-spi: for exynos4 and exynos5 platforms
+    - samsung,exynos7-spi: for exynos7 platforms
 
 - reg: physical base address of the controller and length of memory mapped
   region.

drivers/spi/Kconfig

@@ -459,7 +459,7 @@ config SPI_S3C24XX_FIQ
 
 config SPI_S3C64XX
 	tristate "Samsung S3C64XX series type SPI"
-	depends on PLAT_SAMSUNG
+	depends on (PLAT_SAMSUNG || ARCH_EXYNOS)
 	select S3C64XX_PL080 if ARCH_S3C64XX
 	help
 	  SPI driver for Samsung S3C64XX and newer SoCs.

drivers/spi/spi-mxs.c

@@ -182,7 +182,6 @@ static int mxs_spi_txrx_dma(struct mxs_spi *spi,
 	int min, ret;
 	u32 ctrl0;
 	struct page *vm_page;
-	void *sg_buf;
 	struct {
 		u32			pio[4];
 		struct scatterlist	sg;
@@ -232,13 +231,14 @@ static int mxs_spi_txrx_dma(struct mxs_spi *spi,
 				ret = -ENOMEM;
 				goto err_vmalloc;
 			}
-			sg_buf = page_address(vm_page) +
-				((size_t)buf & ~PAGE_MASK);
+
+			sg_init_table(&dma_xfer[sg_count].sg, 1);
+			sg_set_page(&dma_xfer[sg_count].sg, vm_page,
+				    min, offset_in_page(buf));
 		} else {
-			sg_buf = buf;
+			sg_init_one(&dma_xfer[sg_count].sg, buf, min);
 		}
 
-		sg_init_one(&dma_xfer[sg_count].sg, sg_buf, min);
 		ret = dma_map_sg(ssp->dev, &dma_xfer[sg_count].sg, 1,
 			(flags & TXRX_WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 
@@ -511,7 +511,7 @@ static int mxs_spi_probe(struct platform_device *pdev)
 	init_completion(&spi->c);
 
 	ret = devm_request_irq(&pdev->dev, irq_err, mxs_ssp_irq_handler, 0,
-			       DRIVER_NAME, ssp);
+			       dev_name(&pdev->dev), ssp);
 	if (ret)
 		goto out_master_free;
 

drivers/spi/spi-pxa2xx-pci.c

@@ -19,6 +19,7 @@ enum {
 	PORT_BSW0,
 	PORT_BSW1,
 	PORT_BSW2,
+	PORT_QUARK_X1000,
 };
 
 struct pxa_spi_info {
@@ -92,6 +93,12 @@ static struct pxa_spi_info spi_info_configs[] = {
 		.tx_param = &bsw2_tx_param,
 		.rx_param = &bsw2_rx_param,
 	},
+	[PORT_QUARK_X1000] = {
+		.type = QUARK_X1000_SSP,
+		.port_id = -1,
+		.num_chipselect = 1,
+		.max_clk_rate = 50000000,
+	},
 };
 
 static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
@@ -191,6 +198,7 @@ static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
 
 static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
 	{ PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
+	{ PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
 	{ PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
 	{ PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
 	{ PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },

drivers/spi/spi-pxa2xx.c

@@ -63,10 +63,64 @@ MODULE_ALIAS("platform:pxa2xx-spi");
 				| SSCR1_RFT | SSCR1_TFT | SSCR1_MWDS \
 				| SSCR1_SPH | SSCR1_SPO | SSCR1_LBM)
 
+#define QUARK_X1000_SSCR1_CHANGE_MASK (QUARK_X1000_SSCR1_STRF	\
+				| QUARK_X1000_SSCR1_EFWR	\
+				| QUARK_X1000_SSCR1_RFT		\
+				| QUARK_X1000_SSCR1_TFT		\
+				| SSCR1_SPH | SSCR1_SPO | SSCR1_LBM)
+
 #define LPSS_RX_THRESH_DFLT	64
 #define LPSS_TX_LOTHRESH_DFLT	160
 #define LPSS_TX_HITHRESH_DFLT	224
 
+struct quark_spi_rate {
+	u32 bitrate;
+	u32 dds_clk_rate;
+	u32 clk_div;
+};
+
+/*
+ * 'rate', 'dds', 'clk_div' lookup table, which is defined in
+ * the Quark SPI datasheet.
+ */
+static const struct quark_spi_rate quark_spi_rate_table[] = {
+/*	bitrate,	dds_clk_rate,	clk_div */
+	{50000000,	0x800000,	0},
+	{40000000,	0x666666,	0},
+	{25000000,	0x400000,	0},
+	{20000000,	0x666666,	1},
+	{16667000,	0x800000,	2},
+	{13333000,	0x666666,	2},
+	{12500000,	0x200000,	0},
+	{10000000,	0x800000,	4},
+	{8000000,	0x666666,	4},
+	{6250000,	0x400000,	3},
+	{5000000,	0x400000,	4},
+	{4000000,	0x666666,	9},
+	{3125000,	0x80000,	0},
+	{2500000,	0x400000,	9},
+	{2000000,	0x666666,	19},
+	{1563000,	0x40000,	0},
+	{1250000,	0x200000,	9},
+	{1000000,	0x400000,	24},
+	{800000,	0x666666,	49},
+	{781250,	0x20000,	0},
+	{625000,	0x200000,	19},
+	{500000,	0x400000,	49},
+	{400000,	0x666666,	99},
+	{390625,	0x10000,	0},
+	{250000,	0x400000,	99},
+	{200000,	0x666666,	199},
+	{195313,	0x8000,		0},
+	{125000,	0x100000,	49},
+	{100000,	0x200000,	124},
+	{50000,		0x100000,	124},
+	{25000,		0x80000,	124},
+	{10016,		0x20000,	77},
+	{5040,		0x20000,	154},
+	{1002,		0x8000,		194},
+};
+
 /* Offset from drv_data->lpss_base */
 #define GENERAL_REG		0x08
 #define GENERAL_REG_RXTO_HOLDOFF_DISABLE BIT(24)
@@ -80,6 +134,96 @@ static bool is_lpss_ssp(const struct driver_data *drv_data)
 	return drv_data->ssp_type == LPSS_SSP;
 }
 
+static bool is_quark_x1000_ssp(const struct driver_data *drv_data)
+{
+	return drv_data->ssp_type == QUARK_X1000_SSP;
+}
+
+static u32 pxa2xx_spi_get_ssrc1_change_mask(const struct driver_data *drv_data)
+{
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		return QUARK_X1000_SSCR1_CHANGE_MASK;
+	default:
+		return SSCR1_CHANGE_MASK;
+	}
+}
+
+static u32
+pxa2xx_spi_get_rx_default_thre(const struct driver_data *drv_data)
+{
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		return RX_THRESH_QUARK_X1000_DFLT;
+	default:
+		return RX_THRESH_DFLT;
+	}
+}
+
+static bool pxa2xx_spi_txfifo_full(const struct driver_data *drv_data)
+{
+	void __iomem *reg = drv_data->ioaddr;
+	u32 mask;
+
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		mask = QUARK_X1000_SSSR_TFL_MASK;
+		break;
+	default:
+		mask = SSSR_TFL_MASK;
+		break;
+	}
+
+	return (read_SSSR(reg) & mask) == mask;
+}
+
+static void pxa2xx_spi_clear_rx_thre(const struct driver_data *drv_data,
+				     u32 *sccr1_reg)
+{
+	u32 mask;
+
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		mask = QUARK_X1000_SSCR1_RFT;
+		break;
+	default:
+		mask = SSCR1_RFT;
+		break;
+	}
+	*sccr1_reg &= ~mask;
+}
+
+static void pxa2xx_spi_set_rx_thre(const struct driver_data *drv_data,
+				   u32 *sccr1_reg, u32 threshold)
+{
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		*sccr1_reg |= QUARK_X1000_SSCR1_RxTresh(threshold);
+		break;
+	default:
+		*sccr1_reg |= SSCR1_RxTresh(threshold);
+		break;
+	}
+}
+
+static u32 pxa2xx_configure_sscr0(const struct driver_data *drv_data,
+				  u32 clk_div, u8 bits)
+{
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		return clk_div
+			| QUARK_X1000_SSCR0_Motorola
+			| QUARK_X1000_SSCR0_DataSize(bits > 32 ? 8 : bits)
+			| SSCR0_SSE;
+	default:
+		return clk_div
+			| SSCR0_Motorola
+			| SSCR0_DataSize(bits > 16 ? bits - 16 : bits)
+			| SSCR0_SSE
+			| (bits > 16 ? SSCR0_EDSS : 0);
+	}
+}
+
 /*
  * Read and write LPSS SSP private registers. Caller must first check that
  * is_lpss_ssp() returns true before these can be called.
@@ -234,7 +378,7 @@ static int null_writer(struct driver_data *drv_data)
 	void __iomem *reg = drv_data->ioaddr;
 	u8 n_bytes = drv_data->n_bytes;
 
-	if (((read_SSSR(reg) & SSSR_TFL_MASK) == SSSR_TFL_MASK)
+	if (pxa2xx_spi_txfifo_full(drv_data)
 		|| (drv_data->tx == drv_data->tx_end))
 		return 0;
 
@@ -262,7 +406,7 @@ static int u8_writer(struct driver_data *drv_data)
 {
 	void __iomem *reg = drv_data->ioaddr;
 
-	if (((read_SSSR(reg) & SSSR_TFL_MASK) == SSSR_TFL_MASK)
+	if (pxa2xx_spi_txfifo_full(drv_data)
 		|| (drv_data->tx == drv_data->tx_end))
 		return 0;
 
@@ -289,7 +433,7 @@ static int u16_writer(struct driver_data *drv_data)
 {
 	void __iomem *reg = drv_data->ioaddr;
 
-	if (((read_SSSR(reg) & SSSR_TFL_MASK) == SSSR_TFL_MASK)
+	if (pxa2xx_spi_txfifo_full(drv_data)
 		|| (drv_data->tx == drv_data->tx_end))
 		return 0;
 
@@ -316,7 +460,7 @@ static int u32_writer(struct driver_data *drv_data)
 {
 	void __iomem *reg = drv_data->ioaddr;
 
-	if (((read_SSSR(reg) & SSSR_TFL_MASK) == SSSR_TFL_MASK)
+	if (pxa2xx_spi_txfifo_full(drv_data)
 		|| (drv_data->tx == drv_data->tx_end))
 		return 0;
 
@@ -508,8 +652,9 @@ static irqreturn_t interrupt_transfer(struct driver_data *drv_data)
 		 * remaining RX bytes.
 		 */
 		if (pxa25x_ssp_comp(drv_data)) {
+			u32 rx_thre;
 
-			sccr1_reg &= ~SSCR1_RFT;
+			pxa2xx_spi_clear_rx_thre(drv_data, &sccr1_reg);
 
 			bytes_left = drv_data->rx_end - drv_data->rx;
 			switch (drv_data->n_bytes) {
@@ -519,10 +664,11 @@ static irqreturn_t interrupt_transfer(struct driver_data *drv_data)
 				bytes_left >>= 1;
 			}
 
-			if (bytes_left > RX_THRESH_DFLT)
-				bytes_left = RX_THRESH_DFLT;
+			rx_thre = pxa2xx_spi_get_rx_default_thre(drv_data);
+			if (rx_thre > bytes_left)
+				rx_thre = bytes_left;
 
-			sccr1_reg |= SSCR1_RxTresh(bytes_left);
+			pxa2xx_spi_set_rx_thre(drv_data, &sccr1_reg, rx_thre);
 		}
 		write_SSCR1(sccr1_reg, reg);
 	}
@@ -585,6 +731,28 @@ static irqreturn_t ssp_int(int irq, void *dev_id)
 	return drv_data->transfer_handler(drv_data);
 }
 
+/*
+ * The Quark SPI data sheet gives a table, and for the given 'rate',
+ * the 'dds' and 'clk_div' can be found in the table.
+ */
+static u32 quark_x1000_set_clk_regvals(u32 rate, u32 *dds, u32 *clk_div)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(quark_spi_rate_table); i++) {
+		if (rate >= quark_spi_rate_table[i].bitrate) {
+			*dds = quark_spi_rate_table[i].dds_clk_rate;
+			*clk_div = quark_spi_rate_table[i].clk_div;
+			return quark_spi_rate_table[i].bitrate;
+		}
+	}
+
+	*dds = quark_spi_rate_table[i-1].dds_clk_rate;
+	*clk_div = quark_spi_rate_table[i-1].clk_div;
+
+	return quark_spi_rate_table[i-1].bitrate;
+}
+
 static unsigned int ssp_get_clk_div(struct driver_data *drv_data, int rate)
 {
 	unsigned long ssp_clk = drv_data->max_clk_rate;
@@ -598,6 +766,20 @@ static unsigned int ssp_get_clk_div(struct driver_data *drv_data, int rate)
 		return ((ssp_clk / rate - 1) & 0xfff) << 8;
 }
 
+static unsigned int pxa2xx_ssp_get_clk_div(struct driver_data *drv_data,
+					   struct chip_data *chip, int rate)
+{
+	u32 clk_div;
+
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		quark_x1000_set_clk_regvals(rate, &chip->dds_rate, &clk_div);
+		return clk_div << 8;
+	default:
+		return ssp_get_clk_div(drv_data, rate);
+	}
+}
+
 static void pump_transfers(unsigned long data)
 {
 	struct driver_data *drv_data = (struct driver_data *)data;
@@ -613,6 +795,7 @@ static void pump_transfers(unsigned long data)
 	u32 cr1;
 	u32 dma_thresh = drv_data->cur_chip->dma_threshold;
 	u32 dma_burst = drv_data->cur_chip->dma_burst_size;
+	u32 change_mask = pxa2xx_spi_get_ssrc1_change_mask(drv_data);
 
 	/* Get current state information */
 	message = drv_data->cur_msg;
@@ -699,7 +882,7 @@ static void pump_transfers(unsigned long data)
 		if (transfer->bits_per_word)
 			bits = transfer->bits_per_word;
 
-		clk_div = ssp_get_clk_div(drv_data, speed);
+		clk_div = pxa2xx_ssp_get_clk_div(drv_data, chip, speed);
 
 		if (bits <= 8) {
 			drv_data->n_bytes = 1;
@@ -731,11 +914,7 @@ static void pump_transfers(unsigned long data)
 						     "pump_transfers: DMA burst size reduced to match bits_per_word\n");
 		}
 
-		cr0 = clk_div
-			| SSCR0_Motorola
-			| SSCR0_DataSize(bits > 16 ? bits - 16 : bits)
-			| SSCR0_SSE
-			| (bits > 16 ? SSCR0_EDSS : 0);
+		cr0 = pxa2xx_configure_sscr0(drv_data, clk_div, bits);
 	}
 
 	message->state = RUNNING_STATE;
@@ -771,17 +950,20 @@ static void pump_transfers(unsigned long data)
 			write_SSITF(chip->lpss_tx_threshold, reg);
 	}
 
+	if (is_quark_x1000_ssp(drv_data) &&
+	    (read_DDS_RATE(reg) != chip->dds_rate))
+		write_DDS_RATE(chip->dds_rate, reg);
+
 	/* see if we need to reload the config registers */
-	if ((read_SSCR0(reg) != cr0)
-		|| (read_SSCR1(reg) & SSCR1_CHANGE_MASK) !=
-			(cr1 & SSCR1_CHANGE_MASK)) {
+	if ((read_SSCR0(reg) != cr0) ||
+	    (read_SSCR1(reg) & change_mask) != (cr1 & change_mask)) {
 
 		/* stop the SSP, and update the other bits */
 		write_SSCR0(cr0 & ~SSCR0_SSE, reg);
 		if (!pxa25x_ssp_comp(drv_data))
 			write_SSTO(chip->timeout, reg);
 		/* first set CR1 without interrupt and service enables */
-		write_SSCR1(cr1 & SSCR1_CHANGE_MASK, reg);
+		write_SSCR1(cr1 & change_mask, reg);
 		/* restart the SSP */
 		write_SSCR0(cr0, reg);
 
@@ -875,14 +1057,22 @@ static int setup(struct spi_device *spi)
 	unsigned int clk_div;
 	uint tx_thres, tx_hi_thres, rx_thres;
 
-	if (is_lpss_ssp(drv_data)) {
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		tx_thres = TX_THRESH_QUARK_X1000_DFLT;
+		tx_hi_thres = 0;
+		rx_thres = RX_THRESH_QUARK_X1000_DFLT;
+		break;
+	case LPSS_SSP:
 		tx_thres = LPSS_TX_LOTHRESH_DFLT;
 		tx_hi_thres = LPSS_TX_HITHRESH_DFLT;
 		rx_thres = LPSS_RX_THRESH_DFLT;
-	} else {
+		break;
+	default:
 		tx_thres = TX_THRESH_DFLT;
 		tx_hi_thres = 0;
 		rx_thres = RX_THRESH_DFLT;
+		break;
 	}
 
 	/* Only alloc on first setup */
@@ -935,9 +1125,6 @@ static int setup(struct spi_device *spi)
 		chip->enable_dma = drv_data->master_info->enable_dma;
 	}
 
-	chip->threshold = (SSCR1_RxTresh(rx_thres) & SSCR1_RFT) |
-			(SSCR1_TxTresh(tx_thres) & SSCR1_TFT);
-
 	chip->lpss_rx_threshold = SSIRF_RxThresh(rx_thres);
 	chip->lpss_tx_threshold = SSITF_TxLoThresh(tx_thres)
 				| SSITF_TxHiThresh(tx_hi_thres);
@@ -956,15 +1143,24 @@ static int setup(struct spi_device *spi)
 		}
 	}
 
-	clk_div = ssp_get_clk_div(drv_data, spi->max_speed_hz);
+	clk_div = pxa2xx_ssp_get_clk_div(drv_data, chip, spi->max_speed_hz);
 	chip->speed_hz = spi->max_speed_hz;
 
-	chip->cr0 = clk_div
-			| SSCR0_Motorola
-			| SSCR0_DataSize(spi->bits_per_word > 16 ?
-				spi->bits_per_word - 16 : spi->bits_per_word)
-			| SSCR0_SSE
-			| (spi->bits_per_word > 16 ? SSCR0_EDSS : 0);
+	chip->cr0 = pxa2xx_configure_sscr0(drv_data, clk_div,
+					   spi->bits_per_word);
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		chip->threshold = (QUARK_X1000_SSCR1_RxTresh(rx_thres)
+				   & QUARK_X1000_SSCR1_RFT)
+				   | (QUARK_X1000_SSCR1_TxTresh(tx_thres)
+				   & QUARK_X1000_SSCR1_TFT);
+		break;
+	default:
+		chip->threshold = (SSCR1_RxTresh(rx_thres) & SSCR1_RFT) |
+			(SSCR1_TxTresh(tx_thres) & SSCR1_TFT);
+		break;
+	}
+
 	chip->cr1 &= ~(SSCR1_SPO | SSCR1_SPH);
 	chip->cr1 |= (((spi->mode & SPI_CPHA) != 0) ? SSCR1_SPH : 0)
 			| (((spi->mode & SPI_CPOL) != 0) ? SSCR1_SPO : 0);
@@ -993,7 +1189,8 @@ static int setup(struct spi_device *spi)
 		chip->read = u16_reader;
 		chip->write = u16_writer;
 	} else if (spi->bits_per_word <= 32) {
-		chip->cr0 |= SSCR0_EDSS;
+		if (!is_quark_x1000_ssp(drv_data))
+			chip->cr0 |= SSCR0_EDSS;
 		chip->n_bytes = 4;
 		chip->read = u32_reader;
 		chip->write = u32_writer;
@@ -1144,7 +1341,15 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 	drv_data->ioaddr = ssp->mmio_base;
 	drv_data->ssdr_physical = ssp->phys_base + SSDR;
 	if (pxa25x_ssp_comp(drv_data)) {
-		master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
+		switch (drv_data->ssp_type) {
+		case QUARK_X1000_SSP:
+			master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
+			break;
+		default:
+			master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
+			break;
+		}
+
 		drv_data->int_cr1 = SSCR1_TIE | SSCR1_RIE;
 		drv_data->dma_cr1 = 0;
 		drv_data->clear_sr = SSSR_ROR;
@@ -1182,16 +1387,35 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 
 	/* Load default SSP configuration */
 	write_SSCR0(0, drv_data->ioaddr);
-	write_SSCR1(SSCR1_RxTresh(RX_THRESH_DFLT) |
-				SSCR1_TxTresh(TX_THRESH_DFLT),
-				drv_data->ioaddr);
-	write_SSCR0(SSCR0_SCR(2)
-			| SSCR0_Motorola
-			| SSCR0_DataSize(8),
-			drv_data->ioaddr);
+	switch (drv_data->ssp_type) {
+	case QUARK_X1000_SSP:
+		write_SSCR1(QUARK_X1000_SSCR1_RxTresh(
+					RX_THRESH_QUARK_X1000_DFLT) |
+			    QUARK_X1000_SSCR1_TxTresh(
+					TX_THRESH_QUARK_X1000_DFLT),
+			    drv_data->ioaddr);
+
+		/* using the Motorola SPI protocol and use 8 bit frame */
+		write_SSCR0(QUARK_X1000_SSCR0_Motorola
+			    | QUARK_X1000_SSCR0_DataSize(8),
+			    drv_data->ioaddr);
+		break;
+	default:
+		write_SSCR1(SSCR1_RxTresh(RX_THRESH_DFLT) |
+			    SSCR1_TxTresh(TX_THRESH_DFLT),
+			    drv_data->ioaddr);
+		write_SSCR0(SSCR0_SCR(2)
+			    | SSCR0_Motorola
+			    | SSCR0_DataSize(8),
+			    drv_data->ioaddr);
+		break;
+	}
+
 	if (!pxa25x_ssp_comp(drv_data))
 		write_SSTO(0, drv_data->ioaddr);
-	write_SSPSP(0, drv_data->ioaddr);
+
+	if (!is_quark_x1000_ssp(drv_data))
+		write_SSPSP(0, drv_data->ioaddr);
 
 	lpss_ssp_setup(drv_data);
 

drivers/spi/spi-pxa2xx.h

@@ -93,6 +93,7 @@ struct driver_data {
 struct chip_data {
 	u32 cr0;
 	u32 cr1;
+	u32 dds_rate;
 	u32 psp;
 	u32 timeout;
 	u8 n_bytes;
@@ -126,6 +127,7 @@ DEFINE_SSP_REG(SSCR1, 0x04)
 DEFINE_SSP_REG(SSSR, 0x08)
 DEFINE_SSP_REG(SSITR, 0x0c)
 DEFINE_SSP_REG(SSDR, 0x10)
+DEFINE_SSP_REG(DDS_RATE, 0x28)  /* DDS Clock Rate */
 DEFINE_SSP_REG(SSTO, 0x28)
 DEFINE_SSP_REG(SSPSP, 0x2c)
 DEFINE_SSP_REG(SSITF, SSITF)
@@ -141,18 +143,22 @@ DEFINE_SSP_REG(SSIRF, SSIRF)
 
 static inline int pxa25x_ssp_comp(struct driver_data *drv_data)
 {
-	if (drv_data->ssp_type == PXA25x_SSP)
+	switch (drv_data->ssp_type) {
+	case PXA25x_SSP:
+	case CE4100_SSP:
+	case QUARK_X1000_SSP:
 		return 1;
-	if (drv_data->ssp_type == CE4100_SSP)
-		return 1;
-	return 0;
+	default:
+		return 0;
+	}
 }
 
 static inline void write_SSSR_CS(struct driver_data *drv_data, u32 val)
 {
 	void __iomem *reg = drv_data->ioaddr;
 
-	if (drv_data->ssp_type == CE4100_SSP)
+	if (drv_data->ssp_type == CE4100_SSP ||
+	    drv_data->ssp_type == QUARK_X1000_SSP)
 		val |= read_SSSR(reg) & SSSR_ALT_FRM_MASK;
 
 	write_SSSR(val, reg);

drivers/spi/spi-rockchip.c

@@ -749,8 +749,6 @@ static int rockchip_spi_remove(struct platform_device *pdev)
 	if (rs->dma_rx.ch)
 		dma_release_channel(rs->dma_rx.ch);
 
-	spi_master_put(master);
-
 	return 0;
 }
 

drivers/spi/spi-s3c64xx.c

@@ -33,8 +33,9 @@
 
 #include <linux/platform_data/spi-s3c64xx.h>
 
-#define MAX_SPI_PORTS		3
+#define MAX_SPI_PORTS		6
 #define S3C64XX_SPI_QUIRK_POLL		(1 << 0)
+#define S3C64XX_SPI_QUIRK_CS_AUTO	(1 << 1)
 
 /* Registers and bit-fields */
 
@@ -78,6 +79,7 @@
 
 #define S3C64XX_SPI_SLAVE_AUTO			(1<<1)
 #define S3C64XX_SPI_SLAVE_SIG_INACT		(1<<0)
+#define S3C64XX_SPI_SLAVE_NSC_CNT_2		(2<<4)
 
 #define S3C64XX_SPI_INT_TRAILING_EN		(1<<6)
 #define S3C64XX_SPI_INT_RX_OVERRUN_EN		(1<<5)
@@ -344,16 +346,8 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi)
 		spi->dma_tx = sdd->tx_dma.ch;
 	}
 
-	ret = pm_runtime_get_sync(&sdd->pdev->dev);
-	if (ret < 0) {
-		dev_err(dev, "Failed to enable device: %d\n", ret);
-		goto out_tx;
-	}
-
 	return 0;
 
-out_tx:
-	dma_release_channel(sdd->tx_dma.ch);
 out_rx:
 	dma_release_channel(sdd->rx_dma.ch);
 out:
@@ -370,7 +364,6 @@ static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi)
 		dma_release_channel(sdd->tx_dma.ch);
 	}
 
-	pm_runtime_put(&sdd->pdev->dev);
 	return 0;
 }
 
@@ -717,7 +710,12 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master,
 	enable_datapath(sdd, spi, xfer, use_dma);
 
 	/* Start the signals */
-	writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
+	if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO))
+		writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
+	else
+		writel(readl(sdd->regs + S3C64XX_SPI_SLAVE_SEL)
+			| S3C64XX_SPI_SLAVE_AUTO | S3C64XX_SPI_SLAVE_NSC_CNT_2,
+			sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 
 	spin_unlock_irqrestore(&sdd->lock, flags);
 
@@ -866,13 +864,15 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 	}
 
 	pm_runtime_put(&sdd->pdev->dev);
-	writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
+	if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO))
+		writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 	return 0;
 
 setup_exit:
 	pm_runtime_put(&sdd->pdev->dev);
 	/* setup() returns with device de-selected */
-	writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
+	if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO))
+		writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 
 	if (gpio_is_valid(spi->cs_gpio))
 		gpio_free(spi->cs_gpio);
@@ -946,7 +946,8 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel)
 
 	sdd->cur_speed = 0;
 
-	writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
+	if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO))
+		writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 
 	/* Disable Interrupts - we use Polling if not DMA mode */
 	writel(0, regs + S3C64XX_SPI_INT_EN);
@@ -1341,6 +1342,15 @@ static struct s3c64xx_spi_port_config exynos5440_spi_port_config = {
 	.quirks		= S3C64XX_SPI_QUIRK_POLL,
 };
 
+static struct s3c64xx_spi_port_config exynos7_spi_port_config = {
+	.fifo_lvl_mask	= { 0x1ff, 0x7F, 0x7F, 0x7F, 0x7F, 0x1ff},
+	.rx_lvl_offset	= 15,
+	.tx_st_done	= 25,
+	.high_speed	= true,
+	.clk_from_cmu	= true,
+	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
+};
+
 static struct platform_device_id s3c64xx_spi_driver_ids[] = {
 	{
 		.name		= "s3c2443-spi",
@@ -1374,6 +1384,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = {
 	{ .compatible = "samsung,exynos5440-spi",
 			.data = (void *)&exynos5440_spi_port_config,
 	},
+	{ .compatible = "samsung,exynos7-spi",
+			.data = (void *)&exynos7_spi_port_config,
+	},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, s3c64xx_spi_dt_match);

drivers/spi/spi-sirf.c

@@ -23,6 +23,7 @@
 #include <linux/dmaengine.h>
 #include <linux/dma-direction.h>
 #include <linux/dma-mapping.h>
+#include <linux/reset.h>
 
 #define DRIVER_NAME "sirfsoc_spi"
 
@@ -134,6 +135,7 @@
 	ALIGNED(x->len) && (x->len < 2 * PAGE_SIZE))
 
 #define SIRFSOC_MAX_CMD_BYTES	4
+#define SIRFSOC_SPI_DEFAULT_FRQ 1000000
 
 struct sirfsoc_spi {
 	struct spi_bitbang bitbang;
@@ -629,9 +631,6 @@ static int spi_sirfsoc_setup(struct spi_device *spi)
 {
 	struct sirfsoc_spi *sspi;
 
-	if (!spi->max_speed_hz)
-		return -EINVAL;
-
 	sspi = spi_master_get_devdata(spi->master);
 
 	if (spi->cs_gpio == -ENOENT)
@@ -649,6 +648,12 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
 	int irq;
 	int i, ret;
 
+	ret = device_reset(&pdev->dev);
+	if (ret) {
+		dev_err(&pdev->dev, "SPI reset failed!\n");
+		return ret;
+	}
+
 	master = spi_alloc_master(&pdev->dev, sizeof(*sspi));
 	if (!master) {
 		dev_err(&pdev->dev, "Unable to allocate SPI master\n");
@@ -683,6 +688,7 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | SPI_CS_HIGH;
 	master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(12) |
 					SPI_BPW_MASK(16) | SPI_BPW_MASK(32);
+	master->max_speed_hz = SIRFSOC_SPI_DEFAULT_FRQ;
 	sspi->bitbang.master->dev.of_node = pdev->dev.of_node;
 
 	/* request DMA channels */

include/linux/pxa2xx_ssp.h

@@ -108,6 +108,25 @@
 #define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..4] */
 #endif
 
+/* QUARK_X1000 SSCR0 bit definition */
+#define QUARK_X1000_SSCR0_DSS	(0x1F)		/* Data Size Select (mask) */
+#define QUARK_X1000_SSCR0_DataSize(x)  ((x) - 1)	/* Data Size Select [4..32] */
+#define QUARK_X1000_SSCR0_FRF	(0x3 << 5)	/* FRame Format (mask) */
+#define QUARK_X1000_SSCR0_Motorola	(0x0 << 5)	/* Motorola's Serial Peripheral Interface (SPI) */
+
+#define RX_THRESH_QUARK_X1000_DFLT	1
+#define TX_THRESH_QUARK_X1000_DFLT	16
+
+#define QUARK_X1000_SSSR_TFL_MASK	(0x1F << 8)	/* Transmit FIFO Level mask */
+#define QUARK_X1000_SSSR_RFL_MASK	(0x1F << 13)	/* Receive FIFO Level mask */
+
+#define QUARK_X1000_SSCR1_TFT	(0x1F << 6)	/* Transmit FIFO Threshold (mask) */
+#define QUARK_X1000_SSCR1_TxTresh(x) (((x) - 1) << 6)	/* level [1..32] */
+#define QUARK_X1000_SSCR1_RFT	(0x1F << 11)	/* Receive FIFO Threshold (mask) */
+#define QUARK_X1000_SSCR1_RxTresh(x) (((x) - 1) << 11)	/* level [1..32] */
+#define QUARK_X1000_SSCR1_STRF       (1 << 17)		/* Select FIFO or EFWR */
+#define QUARK_X1000_SSCR1_EFWR	(1 << 16)		/* Enable FIFO Write/Read */
+
 /* extra bits in PXA255, PXA26x and PXA27x SSP ports */
 #define SSCR0_TISSP		(1 << 4)	/* TI Sync Serial Protocol */
 #define SSCR0_PSP		(3 << 4)	/* PSP - Programmable Serial Protocol */
@@ -175,6 +194,7 @@ enum pxa_ssp_type {
 	PXA910_SSP,
 	CE4100_SSP,
 	LPSS_SSP,
+	QUARK_X1000_SSP,
 };
 
 struct ssp_device {