netdev - [PATCH net-next 3/5] ptp: ocp: add serial port of mRO50 MAC on ART card

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Date:   Tue, 18 Oct 2022 00:59:45 +0300
From:   Vadim Fedorenko <vfedorenko@...ek.ru>
To:     Richard Cochran <richardcochran@...il.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Vadim Fedorenko <vadfed@...com>,
        Charles Parent <charles.parent@...lia2s.com>
Subject: [PATCH net-next 3/5] ptp: ocp: add serial port of mRO50 MAC on ART card

From: Vadim Fedorenko <vadfed@...com>

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.

Co-developed-by: Charles Parent <charles.parent@...lia2s.com>
Signed-off-by: Vadim Fedorenko <vadfed@...com>
---
 drivers/ptp/ptp_ocp.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index cd4f3860d72a..d8a723e9e21c 100644
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -213,6 +213,11 @@ 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)
@@ -304,6 +309,7 @@ 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;
@@ -801,6 +807,17 @@ 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,
 	},
@@ -2416,6 +2433,9 @@ 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);
-- 
2.27.0