Merge series "spi: pxa2xx: Set of cleanups" from Andy Shevchenko...

Merge series "spi: pxa2xx: Set of cleanups" from Andy Shevchenko <andriy.shevchenko@linux.intel.com>:

Set of cleanups here and there related to the SPI PXA2xx driver.
On top of them, adding the special type for Intel Merrifield.

In v3:
- rebased on top of v5.13-rc1 and/or spi/for-5,14

In v2:
- cover letter (Mark)
- drop moving the header in patch 5 (Mark)

Andy Shevchenko (14):
  spi: pxa2xx: Use one point of return when ->probe() fails
  spi: pxa2xx: Utilize MMIO and physical base from struct ssp_device
  spi: pxa2xx: Utilize struct device from struct ssp_device
  spi: pxa2xx: Replace header inclusions by forward declarations
  spi: pxa2xx: Unify ifdeffery used in the headers
  spi: pxa2xx: Group Intel Quark specific definitions
  spi: pxa2xx: Introduce int_stop_and_reset() helper
  spi: pxa2xx: Reuse int_error_stop() in pxa2xx_spi_slave_abort()
  spi: pxa2xx: Use pxa_ssp_enable()/pxa_ssp_disable() in the driver
  spi: pxa2xx: Extract pxa2xx_spi_update() helper
  spi: pxa2xx: Extract clear_SSCR1_bits() helper
  spi: pxa2xx: Extract read_SSSR_bits() helper
  spi: pxa2xx: Constify struct driver_data parameter
  spi: pxa2xx: Introduce special type for Merrifield SPIs

 drivers/spi/spi-pxa2xx-dma.c   |  37 +++----
 drivers/spi/spi-pxa2xx-pci.c   |   4 +-
 drivers/spi/spi-pxa2xx.c       | 190 +++++++++++++++++----------------
 drivers/spi/spi-pxa2xx.h       |  52 ++++-----
 include/linux/pxa2xx_ssp.h     |  42 +++++++-
 include/linux/spi/pxa2xx_spi.h |   9 +-
 sound/soc/pxa/pxa-ssp.c        |  16 ---
 7 files changed, 185 insertions(+), 165 deletions(-)

--
2.30.2

drivers/spi/spi-pxa2xx-dma.c

@@ -34,25 +34,18 @@ static void pxa2xx_spi_dma_transfer_complete(struct driver_data *drv_data,
 		 * might not know about the error yet. So we re-check the
 		 * ROR bit here before we clear the status register.
 		 */
-		if (!error) {
-			u32 status = pxa2xx_spi_read(drv_data, SSSR)
-				     & drv_data->mask_sr;
-			error = status & SSSR_ROR;
-		}
+		if (!error)
+			error = read_SSSR_bits(drv_data, drv_data->mask_sr) & SSSR_ROR;
 
 		/* Clear status & disable interrupts */
-		pxa2xx_spi_write(drv_data, SSCR1,
-				 pxa2xx_spi_read(drv_data, SSCR1)
-				 & ~drv_data->dma_cr1);
+		clear_SSCR1_bits(drv_data, drv_data->dma_cr1);
 		write_SSSR_CS(drv_data, drv_data->clear_sr);
 		if (!pxa25x_ssp_comp(drv_data))
 			pxa2xx_spi_write(drv_data, SSTO, 0);
 
 		if (error) {
 			/* In case we got an error we disable the SSP now */
-			pxa2xx_spi_write(drv_data, SSCR0,
-					 pxa2xx_spi_read(drv_data, SSCR0)
-					 & ~SSCR0_SSE);
+			pxa_ssp_disable(drv_data->ssp);
 			msg->status = -EIO;
 		}
 
@@ -123,7 +116,7 @@ irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data)
 {
 	u32 status;
 
-	status = pxa2xx_spi_read(drv_data, SSSR) & drv_data->mask_sr;
+	status = read_SSSR_bits(drv_data, drv_data->mask_sr);
 	if (status & SSSR_ROR) {
 		dev_err(drv_data->ssp->dev, "FIFO overrun\n");
 

drivers/spi/spi-pxa2xx-pci.c

@@ -179,7 +179,7 @@ static struct pxa_spi_info spi_info_configs[] = {
 		.rx_param = &bsw2_rx_param,
 	},
 	[PORT_MRFLD] = {
-		.type = PXA27x_SSP,
+		.type = MRFLD_SSP,
 		.max_clk_rate = 25000000,
 		.setup = mrfld_spi_setup,
 	},

drivers/spi/spi-pxa2xx.h

@@ -93,7 +93,7 @@ static inline void pxa2xx_spi_write(const struct driver_data *drv_data, u32 reg,
 
 #define DMA_ALIGNMENT		8
 
-static inline int pxa25x_ssp_comp(struct driver_data *drv_data)
+static inline int pxa25x_ssp_comp(const struct driver_data *drv_data)
 {
 	switch (drv_data->ssp_type) {
 	case PXA25x_SSP:
@@ -105,11 +105,21 @@ static inline int pxa25x_ssp_comp(struct driver_data *drv_data)
 	}
 }
 
-static inline void write_SSSR_CS(struct driver_data *drv_data, u32 val)
+static inline void clear_SSCR1_bits(const struct driver_data *drv_data, u32 bits)
+{
+	pxa2xx_spi_write(drv_data, SSCR1, pxa2xx_spi_read(drv_data, SSCR1) & ~bits);
+}
+
+static inline u32 read_SSSR_bits(const struct driver_data *drv_data, u32 bits)
+{
+	return pxa2xx_spi_read(drv_data, SSSR) & bits;
+}
+
+static inline void write_SSSR_CS(const struct driver_data *drv_data, u32 val)
 {
 	if (drv_data->ssp_type == CE4100_SSP ||
 	    drv_data->ssp_type == QUARK_X1000_SSP)
-		val |= pxa2xx_spi_read(drv_data, SSSR) & SSSR_ALT_FRM_MASK;
+		val |= read_SSSR_bits(drv_data, SSSR_ALT_FRM_MASK);
 
 	pxa2xx_spi_write(drv_data, SSSR, val);
 }

include/linux/pxa2xx_ssp.h

@@ -183,6 +183,21 @@ struct device_node;
 #define SSACD_ACPS(x)		((x) << 4)	/* Audio clock PLL select */
 #define SSACD_SCDX8		BIT(7)		/* SYSCLK division ratio select */
 
+/* Intel Merrifield SSP */
+#define SFIFOL			0x68		/* FIFO level */
+#define SFIFOTT			0x6c		/* FIFO trigger threshold */
+
+#define RX_THRESH_MRFLD_DFLT	16
+#define TX_THRESH_MRFLD_DFLT	16
+
+#define SFIFOL_TFL_MASK		GENMASK(15, 0)	/* Transmit FIFO Level mask */
+#define SFIFOL_RFL_MASK		GENMASK(31, 16)	/* Receive FIFO Level mask */
+
+#define SFIFOTT_TFT		GENMASK(15, 0)	/* Transmit FIFO Threshold (mask) */
+#define SFIFOTT_TxThresh(x)	(((x) - 1) << 0)	/* TX FIFO trigger threshold / level */
+#define SFIFOTT_RFT		GENMASK(31, 16)	/* Receive FIFO Threshold (mask) */
+#define SFIFOTT_RxThresh(x)	(((x) - 1) << 16)	/* RX FIFO trigger threshold / level */
+
 /* LPSS SSP */
 #define SSITF			0x44		/* TX FIFO trigger level */
 #define SSITF_TxHiThresh(x)	(((x) - 1) << 0)
@@ -205,6 +220,7 @@ enum pxa_ssp_type {
 	MMP2_SSP,
 	PXA910_SSP,
 	CE4100_SSP,
+	MRFLD_SSP,
 	QUARK_X1000_SSP,
 	LPSS_LPT_SSP, /* Keep LPSS types sorted with lpss_platforms[] */
 	LPSS_BYT_SSP,
@@ -254,6 +270,22 @@ static inline u32 pxa_ssp_read_reg(struct ssp_device *dev, u32 reg)
 	return __raw_readl(dev->mmio_base + reg);
 }
 
+static inline void pxa_ssp_enable(struct ssp_device *ssp)
+{
+	u32 sscr0;
+
+	sscr0 = pxa_ssp_read_reg(ssp, SSCR0) | SSCR0_SSE;
+	pxa_ssp_write_reg(ssp, SSCR0, sscr0);
+}
+
+static inline void pxa_ssp_disable(struct ssp_device *ssp)
+{
+	u32 sscr0;
+
+	sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & ~SSCR0_SSE;
+	pxa_ssp_write_reg(ssp, SSCR0, sscr0);
+}
+
 #if IS_ENABLED(CONFIG_PXA_SSP)
 struct ssp_device *pxa_ssp_request(int port, const char *label);
 void pxa_ssp_free(struct ssp_device *);

sound/soc/pxa/pxa-ssp.c

@@ -61,22 +61,6 @@ static void dump_registers(struct ssp_device *ssp)
 		 pxa_ssp_read_reg(ssp, SSACD));
 }
 
-static void pxa_ssp_enable(struct ssp_device *ssp)
-{
-	uint32_t sscr0;
-
-	sscr0 = __raw_readl(ssp->mmio_base + SSCR0) | SSCR0_SSE;
-	__raw_writel(sscr0, ssp->mmio_base + SSCR0);
-}
-
-static void pxa_ssp_disable(struct ssp_device *ssp)
-{
-	uint32_t sscr0;
-
-	sscr0 = __raw_readl(ssp->mmio_base + SSCR0) & ~SSCR0_SSE;
-	__raw_writel(sscr0, ssp->mmio_base + SSCR0);
-}
-
 static void pxa_ssp_set_dma_params(struct ssp_device *ssp, int width4,
 			int out, struct snd_dmaengine_dai_dma_data *dma)
 {