[v2,02/10] soc: fsl: qe: Add support for TSA

diff --git a/drivers/soc/fsl/qe/Kconfig b/drivers/soc/fsl/qe/Kconfig
index 357c5800b112..60ec11c9f4d9 100644
--- a/drivers/soc/fsl/qe/Kconfig
+++ b/drivers/soc/fsl/qe/Kconfig
@@ -33,6 +33,17 @@  config UCC
 	bool
 	default y if UCC_FAST || UCC_SLOW
 
+config CPM_TSA
+	tristate "CPM TSA support"
+	depends on OF && HAS_IOMEM
+	depends on CPM1 || (PPC && COMPILE_TEST)
+	help
+	  Freescale CPM Time Slot Assigner (TSA)
+	  controller.
+
+	  This option enables support for this
+	  controller
+
 config QE_TDM
 	bool
 	default y if FSL_UCC_HDLC
diff --git a/drivers/soc/fsl/qe/Makefile b/drivers/soc/fsl/qe/Makefile
index 55a555304f3a..45c961acc81b 100644
--- a/drivers/soc/fsl/qe/Makefile
+++ b/drivers/soc/fsl/qe/Makefile
@@ -4,6 +4,7 @@ 
 #
 obj-$(CONFIG_QUICC_ENGINE)+= qe.o qe_common.o qe_ic.o qe_io.o
 obj-$(CONFIG_CPM)	+= qe_common.o
+obj-$(CONFIG_CPM_TSA)	+= tsa.o
 obj-$(CONFIG_UCC)	+= ucc.o
 obj-$(CONFIG_UCC_SLOW)	+= ucc_slow.o
 obj-$(CONFIG_UCC_FAST)	+= ucc_fast.o
diff --git a/drivers/soc/fsl/qe/tsa.c b/drivers/soc/fsl/qe/tsa.c
new file mode 100644
index 000000000000..ed4a92e82fa1
--- /dev/null
+++ b/drivers/soc/fsl/qe/tsa.c
@@ -0,0 +1,783 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TSA driver
+ *
+ * Copyright 2022 CS GROUP France
+ *
+ * Author: Herve Codina <herve.codina@bootlin.com>
+ */
+
+#include "tsa.h"
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+/* TSA SI RAM routing tables entry */
+#define TSA_SIRAM_ENTRY_LAST		(1 << 16)
+#define TSA_SIRAM_ENTRY_BYTE		(1 << 17)
+#define TSA_SIRAM_ENTRY_CNT(x)		(((x) & 0x0f) << 18)
+#define TSA_SIRAM_ENTRY_CSEL_MASK	(0x7 << 22)
+#define TSA_SIRAM_ENTRY_CSEL_NU		(0x0 << 22)
+#define TSA_SIRAM_ENTRY_CSEL_SCC2	(0x2 << 22)
+#define TSA_SIRAM_ENTRY_CSEL_SCC3	(0x3 << 22)
+#define TSA_SIRAM_ENTRY_CSEL_SCC4	(0x4 << 22)
+#define TSA_SIRAM_ENTRY_CSEL_SMC1	(0x5 << 22)
+#define TSA_SIRAM_ENTRY_CSEL_SMC2	(0x6 << 22)
+
+/* SI mode register (32 bits) */
+#define TSA_SIMODE	0x00
+#define   TSA_SIMODE_SMC2			0x80000000
+#define   TSA_SIMODE_SMC1			0x00008000
+#define   TSA_SIMODE_TDMA(x)			((x) << 0)
+#define   TSA_SIMODE_TDMB(x)			((x) << 16)
+#define     TSA_SIMODE_TDM_MASK			0x0fff
+#define     TSA_SIMODE_TDM_SDM_MASK		0x0c00
+#define       TSA_SIMODE_TDM_SDM_NORM		0x0000
+#define       TSA_SIMODE_TDM_SDM_ECHO		0x0400
+#define       TSA_SIMODE_TDM_SDM_INTL_LOOP	0x0800
+#define       TSA_SIMODE_TDM_SDM_LOOP_CTRL	0x0c00
+#define     TSA_SIMODE_TDM_RFSD(x)		((x) << 8)
+#define     TSA_SIMODE_TDM_DSC			0x0080
+#define     TSA_SIMODE_TDM_CRT			0x0040
+#define     TSA_SIMODE_TDM_STZ			0x0020
+#define     TSA_SIMODE_TDM_CE			0x0010
+#define     TSA_SIMODE_TDM_FE			0x0008
+#define     TSA_SIMODE_TDM_GM			0x0004
+#define     TSA_SIMODE_TDM_TFSD(x)		((x) << 0)
+
+/* SI global mode register (8 bits) */
+#define TSA_SIGMR	0x04
+#define TSA_SIGMR_ENB			(1<<3)
+#define TSA_SIGMR_ENA			(1<<2)
+#define TSA_SIGMR_RDM_MASK		0x03
+#define   TSA_SIGMR_RDM_STATIC_TDMA	0x00
+#define   TSA_SIGMR_RDM_DYN_TDMA	0x01
+#define   TSA_SIGMR_RDM_STATIC_TDMAB	0x02
+#define   TSA_SIGMR_RDM_DYN_TDMAB	0x03
+
+/* SI status register (8 bits) */
+#define TSA_SISTR	0x06
+
+/* SI command register (8 bits) */
+#define TSA_SICMR	0x07
+
+/* SI clock route register (32 bits) */
+#define TSA_SICR	0x0C
+#define   TSA_SICR_SCC2(x)		((x) << 8)
+#define   TSA_SICR_SCC3(x)		((x) << 16)
+#define   TSA_SICR_SCC4(x)		((x) << 24)
+#define     TSA_SICR_SCC_MASK		0x0ff
+#define     TSA_SICR_SCC_GRX		(1 << 7)
+#define     TSA_SICR_SCC_SCX_TSA	(1 << 6)
+#define     TSA_SICR_SCC_RXCS_MASK	(0x7 << 3)
+#define       TSA_SICR_SCC_RXCS_BRG1	(0x0 << 3)
+#define       TSA_SICR_SCC_RXCS_BRG2	(0x1 << 3)
+#define       TSA_SICR_SCC_RXCS_BRG3	(0x2 << 3)
+#define       TSA_SICR_SCC_RXCS_BRG4	(0x3 << 3)
+#define       TSA_SICR_SCC_RXCS_CLK15	(0x4 << 3)
+#define       TSA_SICR_SCC_RXCS_CLK26	(0x5 << 3)
+#define       TSA_SICR_SCC_RXCS_CLK37	(0x6 << 3)
+#define       TSA_SICR_SCC_RXCS_CLK48	(0x7 << 3)
+#define     TSA_SICR_SCC_TXCS_MASK	(0x7 << 0)
+#define       TSA_SICR_SCC_TXCS_BRG1	(0x0 << 0)
+#define       TSA_SICR_SCC_TXCS_BRG2	(0x1 << 0)
+#define       TSA_SICR_SCC_TXCS_BRG3	(0x2 << 0)
+#define       TSA_SICR_SCC_TXCS_BRG4	(0x3 << 0)
+#define       TSA_SICR_SCC_TXCS_CLK15	(0x4 << 0)
+#define       TSA_SICR_SCC_TXCS_CLK26	(0x5 << 0)
+#define       TSA_SICR_SCC_TXCS_CLK37	(0x6 << 0)
+#define       TSA_SICR_SCC_TXCS_CLK48	(0x7 << 0)
+
+/* Serial interface RAM pointer register (32 bits) */
+#define TSA_SIRP	0x10
+
+struct tsa_entries_area {
+	void *__iomem entries_start;
+	void *__iomem entries_next;
+	void *__iomem last_entry;
+};
+
+struct tsa_tdm {
+	bool is_enable;
+	struct clk *l1rclk_clk;
+	struct clk *l1rsync_clk;
+	struct clk *l1tclk_clk;
+	struct clk *l1tsync_clk;
+	u32 simode_tdm;
+};
+
+#define TSA_TDMA	0
+#define TSA_TDMB	1
+
+struct tsa {
+	struct device *dev;
+	void *__iomem si_regs;
+	void *__iomem si_ram;
+	resource_size_t si_ram_sz;
+	int tdms; /* TSA_TDMx ORed */
+	struct tsa_tdm tdm[2]; /* TDMa and TDMb */
+	struct tsa_cell_info cell_infos[FSL_CPM_TSA_NBCELL];
+};
+
+int tsa_connect(struct tsa *tsa, unsigned int cell_index)
+{
+	u32 clear;
+	u32 set;
+
+	switch (cell_index) {
+	case FSL_CPM_TSA_SCC2:
+		clear = TSA_SICR_SCC2(TSA_SICR_SCC_MASK);
+		set = TSA_SICR_SCC2(TSA_SICR_SCC_SCX_TSA);
+		break;
+	case FSL_CPM_TSA_SCC3:
+		clear = TSA_SICR_SCC3(TSA_SICR_SCC_MASK);
+		set = TSA_SICR_SCC3(TSA_SICR_SCC_SCX_TSA);
+		break;
+	case FSL_CPM_TSA_SCC4:
+		clear = TSA_SICR_SCC4(TSA_SICR_SCC_MASK);
+		set = TSA_SICR_SCC4(TSA_SICR_SCC_SCX_TSA);
+		break;
+	default:
+		dev_err(tsa->dev, "Unsupported cell-index %u\n", cell_index);
+		return -EINVAL;
+	}
+
+	clrsetbits_be32(tsa->si_regs + TSA_SICR, clear, set);
+	return 0;
+}
+EXPORT_SYMBOL(tsa_connect);
+
+int tsa_disconnect(struct tsa *tsa, unsigned int cell_index)
+{
+	u32 clear;
+
+	switch (cell_index) {
+	case 2:
+		clear = TSA_SICR_SCC2(TSA_SICR_SCC_MASK);
+		break;
+	case 3:
+		clear = TSA_SICR_SCC3(TSA_SICR_SCC_MASK);
+		break;
+	case 4:
+		clear = TSA_SICR_SCC4(TSA_SICR_SCC_MASK);
+		break;
+	default:
+		dev_err(tsa->dev, "Unsupported cell-index %u\n", cell_index);
+		return -EINVAL;
+	}
+
+	clrsetbits_be32(tsa->si_regs + TSA_SICR, clear, 0);
+	return 0;
+}
+EXPORT_SYMBOL(tsa_disconnect);
+
+int tsa_get_info(struct tsa *tsa, unsigned int cell_id, struct tsa_cell_info *info)
+{
+	if (cell_id >= FSL_CPM_TSA_NBCELL)
+		return -EINVAL;
+
+	memcpy(info, &tsa->cell_infos[cell_id], sizeof(*info));
+	return 0;
+}
+EXPORT_SYMBOL(tsa_get_info);
+
+static void tsa_init_entries_area(struct tsa *tsa, struct tsa_entries_area *area,
+				  u32 tdms, u32 tdm_id, bool is_rx)
+{
+	resource_size_t quarter;
+	resource_size_t half;
+
+	quarter = tsa->si_ram_sz/4;
+	half = tsa->si_ram_sz/2;
+
+	if (tdms == BIT(TSA_TDMA)) {
+		/* Only TDMA */
+		if (is_rx) {
+			/* First half of si_ram */
+			area->entries_start = tsa->si_ram;
+			area->entries_next = area->entries_start + half;
+			area->last_entry = NULL;
+		} else {
+			/* Second half of si_ram */
+			area->entries_start = tsa->si_ram + half;
+			area->entries_next = area->entries_start + half;
+			area->last_entry = NULL;
+		}
+	} else {
+		/* Only TDMB or both TDMs */
+		if (tdm_id == TSA_TDMA) {
+			if (is_rx) {
+				/* First half of first half of si_ram */
+				area->entries_start = tsa->si_ram;
+				area->entries_next = area->entries_start + quarter;
+				area->last_entry = NULL;
+			} else {
+				/* First half of second half of si_ram */
+				area->entries_start = tsa->si_ram + (2 * quarter);
+				area->entries_next = area->entries_start + quarter;
+				area->last_entry = NULL;
+			}
+		} else {
+			if (is_rx) {
+				/* Second half of first half of si_ram */
+				area->entries_start = tsa->si_ram + quarter;
+				area->entries_next = area->entries_start + quarter;
+				area->last_entry = NULL;
+			} else {
+				/* Second half of second half of si_ram */
+				area->entries_start = tsa->si_ram + (3 * quarter);
+				area->entries_next = area->entries_start + quarter;
+				area->last_entry = NULL;
+			}
+		}
+	}
+}
+
+static const char *tsa_cell_id2name(struct tsa *tsa, u32 cell_id)
+{
+	switch (cell_id) {
+	case FSL_CPM_TSA_NU:	return "Not used";
+	case FSL_CPM_TSA_SCC2:	return "SCC2";
+	case FSL_CPM_TSA_SCC3:	return "SCC3";
+	case FSL_CPM_TSA_SCC4:	return "SCC4";
+	case FSL_CPM_TSA_SMC1:	return "SMC1";
+	case FSL_CPM_TSA_SMC2:	return "SMC2";
+	default:
+		break;
+	}
+	return NULL;
+}
+
+static u32 tsa_cell_id2csel(struct tsa *tsa, u32 cell_id)
+{
+	switch (cell_id) {
+	case FSL_CPM_TSA_SCC2:	return TSA_SIRAM_ENTRY_CSEL_SCC2;
+	case FSL_CPM_TSA_SCC3:	return TSA_SIRAM_ENTRY_CSEL_SCC3;
+	case FSL_CPM_TSA_SCC4:	return TSA_SIRAM_ENTRY_CSEL_SCC4;
+	case FSL_CPM_TSA_SMC1:	return TSA_SIRAM_ENTRY_CSEL_SMC1;
+	case FSL_CPM_TSA_SMC2:	return TSA_SIRAM_ENTRY_CSEL_SMC2;
+	default:
+		break;
+	}
+	return TSA_SIRAM_ENTRY_CSEL_NU;
+}
+
+static int tsa_add_entry(struct tsa *tsa, struct tsa_entries_area *area,
+			 u32 count, u32 cell_id, u32 flags)
+{
+	void *__iomem addr;
+	u32 left;
+	u32 val;
+	u32 cnt;
+	u32 nb;
+
+	addr = area->last_entry ? area->last_entry + 4 : area->entries_start;
+
+	nb = DIV_ROUND_UP(count, 8);
+	if ((addr + (nb * 4)) > area->entries_next) {
+		dev_err(tsa->dev, "si ram area full\n");
+		return -ENOSPC;
+	}
+
+	if (area->last_entry) {
+		/* Clear last flag */
+		clrbits32(area->last_entry, TSA_SIRAM_ENTRY_LAST);
+	}
+
+	left = count;
+	while (left) {
+		val = TSA_SIRAM_ENTRY_BYTE | tsa_cell_id2csel(tsa, cell_id);
+
+		if (left > 16) {
+			cnt = 16;
+		} else {
+			cnt = left;
+			val |= TSA_SIRAM_ENTRY_LAST;
+			area->last_entry = addr;
+		}
+		val |= TSA_SIRAM_ENTRY_CNT(cnt - 1);
+
+		out_be32(addr, val);
+		addr += 4;
+		left -= cnt;
+	}
+
+	return 0;
+}
+
+static int tsa_of_parse_tdm_route(struct tsa *tsa, struct device_node *tdm_np,
+				  u32 tdms, u32 tdm_id, bool is_rx)
+{
+	struct tsa_entries_area area;
+	const char *route_name;
+	int len, i;
+	u32 count;
+	u32 cell_id;
+	const char *cell_name;
+	struct tsa_cell_info *cell_info;
+	struct tsa_tdm *tdm;
+	u32 flags;
+	int ret;
+	u32 ts;
+
+	route_name = is_rx ? "rx_ts_routes" : "tx_ts_routes";
+
+	len = of_property_count_u32_elems(tdm_np,  route_name);
+	if (len < 0) {
+		dev_err(tsa->dev, "%pOF: failed to read %s\n", tdm_np, route_name);
+		return len;
+	}
+	if (len % 3 != 0) {
+		dev_err(tsa->dev, "%pOF: wrong %s format\n", tdm_np, route_name);
+		return -EINVAL;
+	}
+
+	tsa_init_entries_area(tsa, &area, tdms, tdm_id, is_rx);
+	ts = 0;
+	for (i = 0; i < len; i += 3) {
+		of_property_read_u32_index(tdm_np, route_name, i, &count);
+		of_property_read_u32_index(tdm_np, route_name, i + 1, &cell_id);
+		of_property_read_u32_index(tdm_np, route_name, i + 2, &flags);
+
+		cell_name = tsa_cell_id2name(tsa, cell_id);
+		if (!cell_name) {
+			dev_err(tsa->dev, "%pOF: invalid cell id (%u)\n", tdm_np,
+				cell_id);
+			return -EINVAL;
+		}
+
+		dev_dbg(tsa->dev, "tdm_id=%u, %s ts %u..%u -> %s (0x%x)\n",
+			tdm_id, route_name, ts, ts+count-1, cell_name, flags);
+		ts += count;
+
+		ret = tsa_add_entry(tsa, &area, count, cell_id, flags);
+		if (ret)
+			return ret;
+
+		cell_info = &tsa->cell_infos[cell_id];
+		tdm = &tsa->tdm[tdm_id];
+		if (is_rx) {
+			cell_info->rx_fs_rate = clk_get_rate(tdm->l1rsync_clk);
+			cell_info->rx_bit_rate = clk_get_rate(tdm->l1rclk_clk);
+			cell_info->nb_rx_ts += count;
+		} else {
+			cell_info->tx_fs_rate = tdm->l1tsync_clk ?
+				clk_get_rate(tdm->l1tsync_clk) :
+				clk_get_rate(tdm->l1rsync_clk);
+			cell_info->tx_bit_rate = tdm->l1tclk_clk ?
+				clk_get_rate(tdm->l1tclk_clk) :
+				clk_get_rate(tdm->l1rclk_clk);
+			cell_info->nb_tx_ts += count;
+		}
+	}
+	return 0;
+}
+
+static inline int tsa_of_parse_tdm_rx_route(struct tsa *tsa,
+					    struct device_node *tdm_np,
+					    u32 tdms, u32 tdm_id)
+{
+	return tsa_of_parse_tdm_route(tsa, tdm_np, tdms, tdm_id, true);
+}
+
+static inline int tsa_of_parse_tdm_tx_route(struct tsa *tsa,
+					    struct device_node *tdm_np,
+					    u32 tdms, u32 tdm_id)
+{
+	return tsa_of_parse_tdm_route(tsa, tdm_np, tdms, tdm_id, false);
+}
+
+static int tsa_of_parse_tdms(struct tsa *tsa, struct device_node *np)
+{
+	struct device_node *tdm_np;
+	struct tsa_tdm *tdm;
+	struct clk *clk;
+	const char *mode;
+	u32 tdm_id, val;
+	int ret;
+	int i;
+
+	tsa->tdms = 0;
+	tsa->tdm[0].is_enable = false;
+	tsa->tdm[1].is_enable = false;
+
+	for_each_available_child_of_node(np, tdm_np) {
+		ret = of_property_read_u32(tdm_np, "reg", &tdm_id);
+		if (ret) {
+			dev_err(tsa->dev, "%pOF: failed to read reg\n", tdm_np);
+			of_node_put(tdm_np);
+			return ret;
+		}
+		switch (tdm_id) {
+		case 0:
+			tsa->tdms |= BIT(TSA_TDMA);
+			break;
+		case 1:
+			tsa->tdms |= BIT(TSA_TDMB);
+			break;
+		default:
+			dev_err(tsa->dev, "%pOF: Invalid tdm_id (%u)\n", tdm_np,
+				tdm_id);
+			of_node_put(tdm_np);
+			return -EINVAL;
+		}
+	}
+
+	for_each_available_child_of_node(np, tdm_np) {
+		ret = of_property_read_u32(tdm_np, "reg", &tdm_id);
+		if (ret) {
+			dev_err(tsa->dev, "%pOF: failed to read reg\n", tdm_np);
+			of_node_put(tdm_np);
+			return ret;
+		}
+
+		tdm = &tsa->tdm[tdm_id];
+
+		mode = "normal";
+		ret = of_property_read_string(tdm_np, "fsl,mode", &mode);
+		if (ret && ret != -EINVAL) {
+			dev_err(tsa->dev, "%pOF: failed to read fsl,mode\n", tdm_np);
+			of_node_put(tdm_np);
+			return ret;
+		}
+		if (!strcmp(mode, "normal")) {
+			tdm->simode_tdm |= TSA_SIMODE_TDM_SDM_NORM;
+		} else if (!strcmp(mode, "echo")) {
+			tdm->simode_tdm |= TSA_SIMODE_TDM_SDM_ECHO;
+		} else if (!strcmp(mode, "internal-loopback")) {
+			tdm->simode_tdm |= TSA_SIMODE_TDM_SDM_INTL_LOOP;
+		} else if (!strcmp(mode, "control-loopback")) {
+			tdm->simode_tdm |= TSA_SIMODE_TDM_SDM_LOOP_CTRL;
+		} else {
+			dev_err(tsa->dev, "%pOF: Invalid fsl,mode (%s)\n", tdm_np,
+				mode);
+			of_node_put(tdm_np);
+			return -EINVAL;
+		}
+
+		val = 0;
+		ret = of_property_read_u32(tdm_np, "fsl,rx-frame-sync-delay", &val);
+		if (ret && ret != -EINVAL) {
+			dev_err(tsa->dev, "%pOF: failed to read fsl,rx-frame-sync-delay\n",
+				tdm_np);
+			of_node_put(tdm_np);
+			return ret;
+		}
+		if (val > 3) {
+			dev_err(tsa->dev, "%pOF: Invalid fsl,rx-frame-sync-delay (%u)\n",
+				tdm_np, val);
+			of_node_put(tdm_np);
+			return -EINVAL;
+		}
+		tdm->simode_tdm |= TSA_SIMODE_TDM_RFSD(val);
+
+		val = 0;
+		ret = of_property_read_u32(tdm_np, "fsl,tx-frame-sync-delay", &val);
+		if (ret && ret != -EINVAL) {
+			dev_err(tsa->dev, "%pOF: failed to read fsl,tx-frame-sync-delay\n",
+				tdm_np);
+			of_node_put(tdm_np);
+			return ret;
+		}
+		if (val > 3) {
+			dev_err(tsa->dev, "%pOF: Invalid fsl,tx-frame-sync-delay (%u)\n",
+				tdm_np, val);
+			of_node_put(tdm_np);
+			return -EINVAL;
+		}
+		tdm->simode_tdm |= TSA_SIMODE_TDM_TFSD(val);
+
+		if (of_property_read_bool(tdm_np, "fsl,common-rxtx-pins"))
+			tdm->simode_tdm |= TSA_SIMODE_TDM_CRT;
+
+		if (of_property_read_bool(tdm_np, "fsl,clock-falling-edge"))
+			tdm->simode_tdm |= TSA_SIMODE_TDM_CE;
+
+		if (of_property_read_bool(tdm_np, "fsl,fsync-rising-edge"))
+			tdm->simode_tdm |= TSA_SIMODE_TDM_FE;
+
+		if (of_property_read_bool(tdm_np, "fsl,double-speed-clock"))
+			tdm->simode_tdm |= TSA_SIMODE_TDM_DSC;
+
+		if (of_property_read_bool(tdm_np, "fsl,grant-mode"))
+			tdm->simode_tdm |= TSA_SIMODE_TDM_GM;
+
+		clk = of_clk_get_by_name(tdm_np, "l1rsync");
+		if (IS_ERR(clk)) {
+			ret = PTR_ERR(clk);
+			of_node_put(tdm_np);
+			goto err;
+		}
+		ret = clk_prepare_enable(clk);
+		if (ret) {
+			clk_put(clk);
+			of_node_put(tdm_np);
+			goto err;
+		}
+		tdm->l1rsync_clk = clk;
+
+		clk = of_clk_get_by_name(tdm_np, "l1rclk");
+		if (IS_ERR(clk)) {
+			ret = PTR_ERR(clk);
+			of_node_put(tdm_np);
+			goto err;
+		}
+		ret = clk_prepare_enable(clk);
+		if (ret) {
+			clk_put(clk);
+			of_node_put(tdm_np);
+			goto err;
+		}
+		tdm->l1rclk_clk = clk;
+
+		if (!(tdm->simode_tdm & TSA_SIMODE_TDM_CRT)) {
+			clk = of_clk_get_by_name(tdm_np, "l1tsync");
+			if (IS_ERR(clk)) {
+				ret = PTR_ERR(clk);
+				of_node_put(tdm_np);
+				goto err;
+			}
+			ret = clk_prepare_enable(clk);
+			if (ret) {
+				clk_put(clk);
+				of_node_put(tdm_np);
+				goto err;
+			}
+			tdm->l1tsync_clk = clk;
+
+			clk = of_clk_get_by_name(tdm_np, "l1tclk");
+			if (IS_ERR(clk)) {
+				ret = PTR_ERR(clk);
+				of_node_put(tdm_np);
+				goto err;
+			}
+			ret = clk_prepare_enable(clk);
+			if (ret) {
+				clk_put(clk);
+				of_node_put(tdm_np);
+				goto err;
+			}
+			tdm->l1tclk_clk = clk;
+		}
+
+		ret = tsa_of_parse_tdm_rx_route(tsa, tdm_np, tsa->tdms, tdm_id);
+		if (ret) {
+			of_node_put(tdm_np);
+			goto err;
+		}
+
+		ret = tsa_of_parse_tdm_tx_route(tsa, tdm_np, tsa->tdms, tdm_id);
+		if (ret) {
+			of_node_put(tdm_np);
+			goto err;
+		}
+
+		tdm->is_enable = true;
+	}
+	return 0;
+
+err:
+	for (i = 0; i < 2; i++) {
+		if (tsa->tdm[i].l1rsync_clk) {
+			clk_disable_unprepare(tsa->tdm[i].l1rsync_clk);
+			clk_put(tsa->tdm[i].l1rsync_clk);
+		}
+		if (tsa->tdm[i].l1rclk_clk) {
+			clk_disable_unprepare(tsa->tdm[i].l1rclk_clk);
+			clk_put(tsa->tdm[i].l1rclk_clk);
+		}
+		if (tsa->tdm[i].l1tsync_clk) {
+			clk_disable_unprepare(tsa->tdm[i].l1rsync_clk);
+			clk_put(tsa->tdm[i].l1rsync_clk);
+		}
+		if (tsa->tdm[i].l1tclk_clk) {
+			clk_disable_unprepare(tsa->tdm[i].l1rclk_clk);
+			clk_put(tsa->tdm[i].l1rclk_clk);
+		}
+	}
+	return ret;
+}
+
+static void tsa_init_si_ram(struct tsa *tsa)
+{
+	resource_size_t i;
+
+	/* Fill all entries as the last one */
+	for (i = 0; i < tsa->si_ram_sz; i += 4)
+		out_be32(tsa->si_ram + i, TSA_SIRAM_ENTRY_LAST);
+}
+
+static int tsa_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct resource *res;
+	struct tsa *tsa;
+	u32 val;
+	int ret;
+
+	tsa = devm_kzalloc(&pdev->dev, sizeof(*tsa), GFP_KERNEL);
+	if (!tsa)
+		return -ENOMEM;
+
+	tsa->dev = &pdev->dev;
+
+	tsa->si_regs = devm_platform_ioremap_resource_byname(pdev, "si_regs");
+	if (IS_ERR(tsa->si_regs))
+		return PTR_ERR(tsa->si_regs);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "si_ram");
+	if (!res) {
+		dev_err(tsa->dev, "si_ram resource missing\n");
+		return -EINVAL;
+	}
+	tsa->si_ram_sz = resource_size(res);
+	tsa->si_ram = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(tsa->si_ram))
+		return PTR_ERR(tsa->si_ram);
+
+	tsa_init_si_ram(tsa);
+
+	ret = tsa_of_parse_tdms(tsa, np);
+	if (ret)
+		return ret;
+
+	/* Set SIMODE */
+	val = 0;
+	if (tsa->tdm[0].is_enable)
+		val |= TSA_SIMODE_TDMA(tsa->tdm[0].simode_tdm);
+	if (tsa->tdm[1].is_enable)
+		val |= TSA_SIMODE_TDMB(tsa->tdm[1].simode_tdm);
+
+	clrsetbits_be32(tsa->si_regs + TSA_SIMODE,
+		TSA_SIMODE_TDMA(TSA_SIMODE_TDM_MASK) |
+		TSA_SIMODE_TDMB(TSA_SIMODE_TDM_MASK),
+		val);
+
+	/* Set SIGMR */
+	val = (tsa->tdms == BIT(TSA_TDMA)) ?
+		TSA_SIGMR_RDM_STATIC_TDMA : TSA_SIGMR_RDM_STATIC_TDMAB;
+	if (tsa->tdms & BIT(TSA_TDMA))
+		val |= TSA_SIGMR_ENA;
+	if (tsa->tdms & BIT(TSA_TDMB))
+		val |= TSA_SIGMR_ENB;
+	out_8(tsa->si_regs + TSA_SIGMR, val);
+
+	platform_set_drvdata(pdev, tsa);
+
+	return 0;
+}
+
+static int tsa_remove(struct platform_device *pdev)
+{
+	struct tsa *tsa = platform_get_drvdata(pdev);
+	int i;
+
+	for (i = 0; i < 2; i++) {
+		if (tsa->tdm[i].l1rsync_clk) {
+			clk_disable_unprepare(tsa->tdm[i].l1rsync_clk);
+			clk_put(tsa->tdm[i].l1rsync_clk);
+		}
+		if (tsa->tdm[i].l1rclk_clk) {
+			clk_disable_unprepare(tsa->tdm[i].l1rclk_clk);
+			clk_put(tsa->tdm[i].l1rclk_clk);
+		}
+		if (tsa->tdm[i].l1tsync_clk) {
+			clk_disable_unprepare(tsa->tdm[i].l1rsync_clk);
+			clk_put(tsa->tdm[i].l1rsync_clk);
+		}
+		if (tsa->tdm[i].l1tclk_clk) {
+			clk_disable_unprepare(tsa->tdm[i].l1rclk_clk);
+			clk_put(tsa->tdm[i].l1rclk_clk);
+		}
+	}
+	return 0;
+}
+
+static const struct of_device_id tsa_id_table[] = {
+	{ .compatible = "fsl,cpm1-tsa" },
+	{} /* sentinel */
+};
+MODULE_DEVICE_TABLE(of, tsa_id_table);
+
+static struct platform_driver tsa_driver = {
+	.driver = {
+		.name = "fsl-tsa",
+		.of_match_table = of_match_ptr(tsa_id_table),
+	},
+	.probe = tsa_probe,
+	.remove = tsa_remove,
+};
+module_platform_driver(tsa_driver);
+
+struct tsa *tsa_get_byphandle(struct device_node *np, const char *phandle_name)
+{
+	struct platform_device *pdev;
+	struct device_node *tsa_np;
+	struct tsa *tsa;
+
+	tsa_np = of_parse_phandle(np, phandle_name, 0);
+	if (!tsa_np)
+		return ERR_PTR(-EINVAL);
+
+	if (!of_match_node(tsa_driver.driver.of_match_table, tsa_np)) {
+		of_node_put(tsa_np);
+		return ERR_PTR(-EINVAL);
+	}
+
+	pdev = of_find_device_by_node(tsa_np);
+	of_node_put(tsa_np);
+	if (!pdev)
+		return ERR_PTR(-ENODEV);
+
+	tsa = platform_get_drvdata(pdev);
+	if (!tsa) {
+		platform_device_put(pdev);
+		return ERR_PTR(-EPROBE_DEFER);
+	}
+
+	return tsa;
+}
+EXPORT_SYMBOL(tsa_get_byphandle);
+
+void tsa_put(struct tsa *tsa)
+{
+	put_device(tsa->dev);
+}
+EXPORT_SYMBOL(tsa_put);
+
+static void devm_tsa_release(struct device *dev, void *res)
+{
+	struct tsa **tsa = res;
+
+	tsa_put(*tsa);
+}
+
+struct tsa *devm_tsa_get_byphandle(struct device *dev, struct device_node *np,
+				   const char *phandle_name)
+{
+	struct tsa *tsa;
+	struct tsa **dr;
+
+	dr = devres_alloc(devm_tsa_release, sizeof(*dr), GFP_KERNEL);
+	if (!dr)
+		return ERR_PTR(-ENOMEM);
+
+	tsa = tsa_get_byphandle(np, phandle_name);
+	if (!IS_ERR(tsa)) {
+		*dr = tsa;
+		devres_add(dev, dr);
+	} else {
+		devres_free(dr);
+	}
+
+	return tsa;
+}
+EXPORT_SYMBOL(devm_tsa_get_byphandle);
+
+MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>");
+MODULE_DESCRIPTION("CPM TSA driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/soc/fsl/qe/tsa.h b/drivers/soc/fsl/qe/tsa.h
new file mode 100644
index 000000000000..ab1ed7a8a1a9
--- /dev/null
+++ b/drivers/soc/fsl/qe/tsa.h
@@ -0,0 +1,43 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * TSA management
+ *
+ * Copyright 2022 CS GROUP France
+ *
+ * Author: Herve Codina <herve.codina@bootlin.com>
+ */
+#ifndef __SOC_FSL_TSA_H__
+#define __SOC_FSL_TSA_H__
+
+#include <dt-bindings/soc/fsl-tsa.h>
+#include <linux/types.h>
+
+struct device_node;
+struct device;
+struct tsa;
+
+struct tsa *tsa_get_byphandle(struct device_node *np, const char *phandle_name);
+void tsa_put(struct tsa *tsa);
+struct tsa *devm_tsa_get_byphandle(struct device *dev, struct device_node *np,
+				   const char *phandle_name);
+
+/* Connect and disconnect. cell_id is one of FSL_CPM_TSA_* available in
+ * dt-bindings/soc/fsl-fsa.h
+ */
+int tsa_connect(struct tsa *tsa, unsigned int cell_id);
+int tsa_disconnect(struct tsa *tsa, unsigned int cell_id);
+
+/* Cell information */
+struct tsa_cell_info {
+	unsigned long rx_fs_rate;
+	unsigned long rx_bit_rate;
+	u8 nb_rx_ts;
+	unsigned long tx_fs_rate;
+	unsigned long tx_bit_rate;
+	u8 nb_tx_ts;
+};
+
+/* Get information */
+int tsa_get_info(struct tsa *tsa, unsigned int cell_id, struct tsa_cell_info *info);
+
+#endif /* __SOC_FSL_TSA_H__ */