[PATCH v3 5/6] net: phy: spi_ks8995: add support for MICREL KSZ8795CLX

[Helmut Buchsbaum]

Add support for MICREL KSZ8795CLX Integrated 5-Port, 10-/100-Managed
Ethernet Switch with Gigabit GMII/RGMII and MII/RMII interfaces.

Signed-off-by: Helmut Buchsbaum <helmut.buchsb...@gmail.com>
---
 drivers/net/phy/spi_ks8995.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/net/phy/spi_ks8995.c b/drivers/net/phy/spi_ks8995.c
index f866786..c2d6c23 100644
--- a/drivers/net/phy/spi_ks8995.c
+++ b/drivers/net/phy/spi_ks8995.c
@@ -77,6 +77,7 @@
 
 #define KS8995_REGS_SIZE       0x80
 #define KSZ8864_REGS_SIZE      0x100
+#define KSZ8795_REGS_SIZE      0x100
 
 #define ID1_CHIPID_M           0xf
 #define ID1_CHIPID_S           4
@@ -85,9 +86,11 @@
 #define ID1_START_SW           1       /* start the switch */
 
 #define FAMILY_KS8995          0x95
+#define FAMILY_KSZ8795         0x87
 #define CHIPID_M               0
 #define KS8995_CHIP_ID         0x00
 #define KSZ8864_CHIP_ID                0x01
+#define KSZ8795_CHIP_ID                0x09
 
 #define KS8995_CMD_WRITE       0x02U
 #define KS8995_CMD_READ                0x03U
@@ -97,6 +100,7 @@
 enum ks8995_chip_variant {
        ks8995,
        ksz8864,
+       ksz8795,
        max_variant
 };
 
@@ -126,6 +130,14 @@ static const struct ks8995_chip_params ks8995_chip[] = {
                .addr_width = 8,
                .addr_shift = 0,
        },
+       [ksz8795] = {
+               .name = "KSZ8795CLX",
+               .family_id = FAMILY_KSZ8795,
+               .chip_id = KSZ8795_CHIP_ID,
+               .regs_size = KSZ8795_REGS_SIZE,
+               .addr_width = 12,
+               .addr_shift = 1,
+       },
 };
 
 struct ks8995_pdata {
@@ -145,6 +157,7 @@ struct ks8995_switch {
 static const struct spi_device_id ks8995_id[] = {
        {"ks8995", ks8995},
        {"ksz8864", ksz8864},
+       {"ksz8795", ksz8795},
        { }
 };
 MODULE_DEVICE_TABLE(spi, ks8995_id);
@@ -358,6 +371,22 @@ static int ks8995_get_revision(struct ks8995_switch *ks)
                        err = -ENODEV;
                }
                break;
+       case FAMILY_KSZ8795:
+               /* try reading chip id at CHIP ID1 */
+               err = ks8995_read_reg(ks, KS8995_REG_ID1, &id1);
+               if (err) {
+                       err = -EIO;
+                       goto err_out;
+               }
+
+               if (get_chip_id(id1) == ks->chip->chip_id) {
+                       ks->revision_id = get_chip_rev(id1);
+               } else {
+                       dev_err(&ks->spi->dev, "unsupported chip id for KSZ8795 
family: 0x%02x\n",
+                               id1);
+                       err = -ENODEV;
+               }
+               break;
        default:
                dev_err(&ks->spi->dev, "unsupported family id: 0x%02x\n", id0);
                err = -ENODEV;
-- 
2.1.4