spi: pxa2xx: Get rid of unused ->cs_control()

Since the last user of the custom ->cs_control() gone, we may get rid of
this legacy API completely.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211123192723.44537-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/spi/pxa2xx.rst b/Documentation/spi/pxa2xx.rst
index 6312968..dfc7673 100644 (file)
--- a/Documentation/spi/pxa2xx.rst
+++ b/Documentation/spi/pxa2xx.rst
@@ -102,7 +102,7 @@ device. All fields are optional.
        u8 dma_burst_size;
        u32 timeout;
        u8 enable_loopback;
-       void (*cs_control)(u32 command);
+       int gpio_cs;
   };
 
 The "pxa2xx_spi_chip.tx_threshold" and "pxa2xx_spi_chip.rx_threshold" fields are
@@ -133,11 +133,6 @@ into internal loopback mode.  In this mode the SSP controller internally
 connects the SSPTX pin to the SSPRX pin.  This is useful for initial setup
 testing.
 
-The "pxa2xx_spi_chip.cs_control" field is used to point to a board specific
-function for asserting/deasserting a slave device chip select.  If the field is
-NULL, the pxa2xx_spi master controller driver assumes that the SSP port is
-configured to use GPIO or SSPFRM instead.
-
 NOTE: the SPI driver cannot control the chip select if SSPFRM is used, so the
 chipselect is dropped after each spi_transfer.  Most devices need chip select
 asserted around the complete message. Use SSPFRM as a GPIO (through a descriptor)
@@ -152,30 +147,12 @@ field. Below is a sample configuration using the PXA255 NSSP.
 
 ::
 
-  /* Chip Select control for the CS8415A SPI slave device */
-  static void cs8415a_cs_control(u32 command)
-  {
-       if (command & PXA2XX_CS_ASSERT)
-               GPCR(2) = GPIO_bit(2);
-       else
-               GPSR(2) = GPIO_bit(2);
-  }
-
-  /* Chip Select control for the CS8405A SPI slave device */
-  static void cs8405a_cs_control(u32 command)
-  {
-       if (command & PXA2XX_CS_ASSERT)
-               GPCR(3) = GPIO_bit(3);
-       else
-               GPSR(3) = GPIO_bit(3);
-  }
-
   static struct pxa2xx_spi_chip cs8415a_chip_info = {
        .tx_threshold = 8, /* SSP hardward FIFO threshold */
        .rx_threshold = 8, /* SSP hardward FIFO threshold */
        .dma_burst_size = 8, /* Byte wide transfers used so 8 byte bursts */
        .timeout = 235, /* See Intel documentation */
-       .cs_control = cs8415a_cs_control, /* Use external chip select */
+       .gpio_cs = 2, /* Use external chip select */
   };
 
   static struct pxa2xx_spi_chip cs8405a_chip_info = {
@@ -183,7 +160,7 @@ field. Below is a sample configuration using the PXA255 NSSP.
        .rx_threshold = 8, /* SSP hardward FIFO threshold */
        .dma_burst_size = 8, /* Byte wide transfers used so 8 byte bursts */
        .timeout = 235, /* See Intel documentation */
-       .cs_control = cs8405a_cs_control, /* Use external chip select */
+       .gpio_cs = 3, /* Use external chip select */
   };
 
   static struct spi_board_info streetracer_spi_board_info[] __initdata = {

diff --git a/arch/arm/mach-pxa/stargate2.c b/arch/arm/mach-pxa/stargate2.c
index 7ad6274..8ca02ec 100644 (file)
--- a/arch/arm/mach-pxa/stargate2.c
+++ b/arch/arm/mach-pxa/stargate2.c
@@ -347,7 +347,7 @@ static struct pxa2xx_spi_controller pxa_ssp_master_2_info = {
 };
 
 /* An upcoming kernel change will scrap SFRM usage so these
- * drivers have been moved to use gpio's via cs_control */
+ * drivers have been moved to use GPIOs */
 static struct pxa2xx_spi_chip staccel_chip_info = {
        .tx_threshold = 8,
        .rx_threshold = 8,

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index ee3297d..2419615 100644 (file)
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -427,7 +427,6 @@ static void lpss_ssp_cs_control(struct spi_device *spi, bool enable)
 
 static void cs_assert(struct spi_device *spi)
 {
-       struct chip_data *chip = spi_get_ctldata(spi);
        struct driver_data *drv_data =
                spi_controller_get_devdata(spi->controller);
 
@@ -436,18 +435,12 @@ static void cs_assert(struct spi_device *spi)
                return;
        }
 
-       if (chip->cs_control) {
-               chip->cs_control(PXA2XX_CS_ASSERT);
-               return;
-       }
-
        if (is_lpss_ssp(drv_data))
                lpss_ssp_cs_control(spi, true);
 }
 
 static void cs_deassert(struct spi_device *spi)
 {
-       struct chip_data *chip = spi_get_ctldata(spi);
        struct driver_data *drv_data =
                spi_controller_get_devdata(spi->controller);
        unsigned long timeout;
@@ -461,11 +454,6 @@ static void cs_deassert(struct spi_device *spi)
               !time_after(jiffies, timeout))
                cpu_relax();
 
-       if (chip->cs_control) {
-               chip->cs_control(PXA2XX_CS_DEASSERT);
-               return;
-       }
-
        if (is_lpss_ssp(drv_data))
                lpss_ssp_cs_control(spi, false);
 }
@@ -1204,12 +1192,6 @@ static int setup_cs(struct spi_device *spi, struct chip_data *chip,
         */
        cleanup_cs(spi);
 
-       /* If ->cs_control() is provided, ignore GPIO chip select */
-       if (chip_info->cs_control) {
-               chip->cs_control = chip_info->cs_control;
-               return 0;
-       }
-
        if (gpio_is_valid(chip_info->gpio_cs)) {
                int gpio = chip_info->gpio_cs;
                int err;

diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h
index 4d77f4d..45cdbbc 100644 (file)
--- a/drivers/spi/spi-pxa2xx.h
+++ b/drivers/spi/spi-pxa2xx.h
@@ -49,7 +49,6 @@ struct driver_data {
        int (*write)(struct driver_data *drv_data);
        int (*read)(struct driver_data *drv_data);
        irqreturn_t (*transfer_handler)(struct driver_data *drv_data);
-       void (*cs_control)(u32 command);
 
        void __iomem *lpss_base;
 
@@ -67,8 +66,6 @@ struct chip_data {
        u32 threshold;
        u16 lpss_rx_threshold;
        u16 lpss_tx_threshold;
-
-       void (*cs_control)(u32 command);
 };
 
 static inline u32 pxa2xx_spi_read(const struct driver_data *drv_data, u32 reg)

diff --git a/include/linux/spi/pxa2xx_spi.h b/include/linux/spi/pxa2xx_spi.h
index eaab121..42e06bf 100644 (file)
--- a/include/linux/spi/pxa2xx_spi.h
+++ b/include/linux/spi/pxa2xx_spi.h
@@ -9,9 +9,6 @@
 
 #include <linux/pxa2xx_ssp.h>
 
-#define PXA2XX_CS_ASSERT (0x01)
-#define PXA2XX_CS_DEASSERT (0x02)
-
 struct dma_chan;
 
 /*
@@ -47,7 +44,6 @@ struct pxa2xx_spi_chip {
        u32 timeout;
        u8 enable_loopback;
        int gpio_cs;
-       void (*cs_control)(u32 command);
 };
 
 #if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)