can: mcp251x: add support for mcp25625

[ Upstream commit 35b7fa4d07c43ad79b88e6462119e7140eae955c ]

Fully compatible with mcp2515, the mcp25625 have integrated transceiver.

This patch adds support for the mcp25625 to the existing mcp251x driver.

Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/can/spi/Kconfig b/drivers/net/can/spi/Kconfig
index 148cae5..249d2db 100644 (file)
--- a/drivers/net/can/spi/Kconfig
+++ b/drivers/net/can/spi/Kconfig
@@ -2,9 +2,10 @@ menu "CAN SPI interfaces"
        depends on SPI
 
 config CAN_MCP251X
-       tristate "Microchip MCP251x SPI CAN controllers"
+       tristate "Microchip MCP251x and MCP25625 SPI CAN controllers"
        depends on HAS_DMA
        ---help---
-         Driver for the Microchip MCP251x SPI CAN controllers.
+         Driver for the Microchip MCP251x and MCP25625 SPI CAN
+         controllers.
 
 endmenu

diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c
index f3f05fe..d8c448b 100644 (file)
--- a/drivers/net/can/spi/mcp251x.c
+++ b/drivers/net/can/spi/mcp251x.c
@@ -1,5 +1,5 @@
 /*
- * CAN bus driver for Microchip 251x CAN Controller with SPI Interface
+ * CAN bus driver for Microchip 251x/25625 CAN Controller with SPI Interface
  *
  * MCP2510 support and bug fixes by Christian Pellegrin
  * <chripell@evolware.org>
@@ -41,7 +41,7 @@
  * static struct spi_board_info spi_board_info[] = {
  *         {
  *                 .modalias = "mcp2510",
- *                     // or "mcp2515" depending on your controller
+ *                     // "mcp2515" or "mcp25625" depending on your controller
  *                 .platform_data = &mcp251x_info,
  *                 .irq = IRQ_EINT13,
  *                 .max_speed_hz = 2*1000*1000,
@@ -238,6 +238,7 @@ static const struct can_bittiming_const mcp251x_bittiming_const = {
 enum mcp251x_model {
        CAN_MCP251X_MCP2510     = 0x2510,
        CAN_MCP251X_MCP2515     = 0x2515,
+       CAN_MCP251X_MCP25625    = 0x25625,
 };
 
 struct mcp251x_priv {
@@ -280,7 +281,6 @@ static inline int mcp251x_is_##_model(struct spi_device *spi) \
 }
 
 MCP251X_IS(2510);
-MCP251X_IS(2515);
 
 static void mcp251x_clean(struct net_device *net)
 {
@@ -640,7 +640,7 @@ static int mcp251x_hw_reset(struct spi_device *spi)
 
        /* Wait for oscillator startup timer after reset */
        mdelay(MCP251X_OST_DELAY_MS);
-       
+
        reg = mcp251x_read_reg(spi, CANSTAT);
        if ((reg & CANCTRL_REQOP_MASK) != CANCTRL_REQOP_CONF)
                return -ENODEV;
@@ -821,9 +821,8 @@ static irqreturn_t mcp251x_can_ist(int irq, void *dev_id)
                /* receive buffer 0 */
                if (intf & CANINTF_RX0IF) {
                        mcp251x_hw_rx(spi, 0);
-                       /*
-                        * Free one buffer ASAP
-                        * (The MCP2515 does this automatically.)
+                       /* Free one buffer ASAP
+                        * (The MCP2515/25625 does this automatically.)
                         */
                        if (mcp251x_is_2510(spi))
                                mcp251x_write_bits(spi, CANINTF, CANINTF_RX0IF, 0x00);
@@ -832,7 +831,7 @@ static irqreturn_t mcp251x_can_ist(int irq, void *dev_id)
                /* receive buffer 1 */
                if (intf & CANINTF_RX1IF) {
                        mcp251x_hw_rx(spi, 1);
-                       /* the MCP2515 does this automatically */
+                       /* The MCP2515/25625 does this automatically. */
                        if (mcp251x_is_2510(spi))
                                clear_intf |= CANINTF_RX1IF;
                }
@@ -1007,6 +1006,10 @@ static const struct of_device_id mcp251x_of_match[] = {
                .compatible     = "microchip,mcp2515",
                .data           = (void *)CAN_MCP251X_MCP2515,
        },
+       {
+               .compatible     = "microchip,mcp25625",
+               .data           = (void *)CAN_MCP251X_MCP25625,
+       },
        { }
 };
 MODULE_DEVICE_TABLE(of, mcp251x_of_match);
@@ -1020,6 +1023,10 @@ static const struct spi_device_id mcp251x_id_table[] = {
                .name           = "mcp2515",
                .driver_data    = (kernel_ulong_t)CAN_MCP251X_MCP2515,
        },
+       {
+               .name           = "mcp25625",
+               .driver_data    = (kernel_ulong_t)CAN_MCP251X_MCP25625,
+       },
        { }
 };
 MODULE_DEVICE_TABLE(spi, mcp251x_id_table);
@@ -1260,5 +1267,5 @@ module_spi_driver(mcp251x_can_driver);
 
 MODULE_AUTHOR("Chris Elston <celston@katalix.com>, "
              "Christian Pellegrin <chripell@evolware.org>");
-MODULE_DESCRIPTION("Microchip 251x CAN driver");
+MODULE_DESCRIPTION("Microchip 251x/25625 CAN driver");
 MODULE_LICENSE("GPL v2");