ptp: ocp: add serial port of mRO50 MAC on ART card

ART card provides interface to access to serial port of miniature atomic
clock found on the card. Add support for this device and configure it
during init phase.

Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Co-developed-by: Charles Parent <charles.parent@orolia2s.com>
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: Vadim Fedorenko <vadfed@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index 8c1ce63..223980d 100644 (file)
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -208,6 +208,11 @@ struct frequency_reg {
        u32     ctrl;
        u32     status;
 };
+
+struct board_config_reg {
+       u32 mro50_serial_activate;
+};
+
 #define FREQ_STATUS_VALID      BIT(31)
 #define FREQ_STATUS_ERROR      BIT(30)
 #define FREQ_STATUS_OVERRUN    BIT(29)
@@ -299,6 +304,7 @@ struct ptp_ocp {
        struct tod_reg __iomem  *tod;
        struct pps_reg __iomem  *pps_to_ext;
        struct pps_reg __iomem  *pps_to_clk;
+       struct board_config_reg __iomem *board_config;
        struct gpio_reg __iomem *pps_select;
        struct gpio_reg __iomem *sma_map1;
        struct gpio_reg __iomem *sma_map2;
@@ -796,6 +802,17 @@ static struct ocp_resource ocp_art_resource[] = {
                },
        },
        {
+               OCP_SERIAL_RESOURCE(mac_port),
+               .offset = 0x00190000, .irq_vec = 7,
+               .extra = &(struct ptp_ocp_serial_port) {
+                       .baud = 9600,
+               },
+       },
+       {
+               OCP_MEM_RESOURCE(board_config),
+               .offset = 0x210000, .size = 0x1000,
+       },
+       {
                .setup = ptp_ocp_art_board_init,
        },
        { }
@@ -2532,6 +2549,9 @@ ptp_ocp_art_board_init(struct ptp_ocp *bp, struct ocp_resource *r)
        bp->fw_tag = 2;
        bp->sma_op = &ocp_art_sma_op;
 
+       /* Enable MAC serial port during initialisation */
+       iowrite32(1, &bp->board_config->mro50_serial_activate);
+
        ptp_ocp_sma_init(bp);
 
        err = ptp_ocp_attr_group_add(bp, art_timecard_groups);