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* [PATCH v3 0/4] Silvaco I3C master driver
@ 2020-12-28 16:11 Miquel Raynal
  2020-12-28 16:11 ` [PATCH v3 1/4] dt-bindings: Add vendor prefix for Silvaco Miquel Raynal
                   ` (3 more replies)
  0 siblings, 4 replies; 7+ messages in thread
From: Miquel Raynal @ 2020-12-28 16:11 UTC (permalink / raw)
  To: Alexandre Belloni, linux-i3c
  Cc: devicetree, Rajeev Huralikoppi, Nicolas Pitre, Rob Herring,
	Thomas Petazzoni, Miquel Raynal, Conor Culhane

Hello,

Here is the addition of a driver for the Silvaco I3C master IP.

Changes in v3:
* Fix the MAINTAINERS file.
* Fix the bindings (clocks description, size-cells, etc)
* Add Rob's Ack on one patch.
* Dropped unnecessary locks.
* Used a hardware feature to automatically NACK IBI's during regular
  data transfers.
* Stopped flushing FIFOs (not needed).
* Entirely reworked the IBI handling logic.
* Dropped the warning when a device does not advertise it's dynamic
  address during an IBI.
* Moved the IBI logic into the master's workqueue instead of a
  threaded handler.
* Added a svc_i3c_master_readb() helper.
* Used consistent bit definitions (BIT() vs. FIELD_GET()).

Changes in v2:
* Change the manufacturer name from svc to silvaco.

Miquel Raynal (4):
  dt-bindings: Add vendor prefix for Silvaco
  dt-bindings: i3c: Describe Silvaco master binding
  i3c: master: svc: Add Silvaco I3C master driver
  MAINTAINERS: Add Silvaco I3C master

 .../bindings/i3c/silvaco,i3c-master.yaml      |   63 +
 .../devicetree/bindings/vendor-prefixes.yaml  |    2 +
 MAINTAINERS                                   |    8 +
 drivers/i3c/master/Kconfig                    |    8 +
 drivers/i3c/master/Makefile                   |    1 +
 drivers/i3c/master/svc-i3c-master.c           | 1478 +++++++++++++++++
 6 files changed, 1560 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml
 create mode 100644 drivers/i3c/master/svc-i3c-master.c

-- 
2.20.1


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^ permalink raw reply	[flat|nested] 7+ messages in thread

* [PATCH v3 1/4] dt-bindings: Add vendor prefix for Silvaco
  2020-12-28 16:11 [PATCH v3 0/4] Silvaco I3C master driver Miquel Raynal
@ 2020-12-28 16:11 ` Miquel Raynal
  2020-12-28 16:11 ` [PATCH v3 2/4] dt-bindings: i3c: Describe Silvaco master binding Miquel Raynal
                   ` (2 subsequent siblings)
  3 siblings, 0 replies; 7+ messages in thread
From: Miquel Raynal @ 2020-12-28 16:11 UTC (permalink / raw)
  To: Alexandre Belloni, linux-i3c
  Cc: devicetree, Rajeev Huralikoppi, Nicolas Pitre, Rob Herring,
	Thomas Petazzoni, Miquel Raynal, Rob Herring, Conor Culhane

Silvaco, Inc. is an EDA provider of software tools used for process
and device development and for analog/mixed-signal, power IC and
memory design [1].

[1] https://www.silvaco.com/company/profile/profile.html

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 041ae90b0d8f..df1b7971c07e 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1075,6 +1075,8 @@ patternProperties:
     description: Shenzhen Sunchip Technology Co., Ltd
   "^SUNW,.*":
     description: Sun Microsystems, Inc
+  "^silvaco,.*":
+    description: Silvaco, Inc.
   "^swir,.*":
     description: Sierra Wireless
   "^syna,.*":
-- 
2.20.1


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^ permalink raw reply	[flat|nested] 7+ messages in thread

* [PATCH v3 2/4] dt-bindings: i3c: Describe Silvaco master binding
  2020-12-28 16:11 [PATCH v3 0/4] Silvaco I3C master driver Miquel Raynal
  2020-12-28 16:11 ` [PATCH v3 1/4] dt-bindings: Add vendor prefix for Silvaco Miquel Raynal
@ 2020-12-28 16:11 ` Miquel Raynal
  2021-01-11 20:08   ` Rob Herring
  2020-12-28 16:11 ` [PATCH v3 3/4] i3c: master: svc: Add Silvaco I3C master driver Miquel Raynal
  2020-12-28 16:11 ` [PATCH v3 4/4] MAINTAINERS: Add Silvaco I3C master Miquel Raynal
  3 siblings, 1 reply; 7+ messages in thread
From: Miquel Raynal @ 2020-12-28 16:11 UTC (permalink / raw)
  To: Alexandre Belloni, linux-i3c
  Cc: devicetree, Rajeev Huralikoppi, Nicolas Pitre, Rob Herring,
	Thomas Petazzoni, Miquel Raynal, Conor Culhane

Silvaco provide a dual-role I3C master.

Description is rather simple: it needs a register mapping, three
clocks and an interrupt.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 .../bindings/i3c/silvaco,i3c-master.yaml      | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml

diff --git a/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml b/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml
new file mode 100644
index 000000000000..509de48455b0
--- /dev/null
+++ b/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i3c/silvaco,i3c-master.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Silvaco I3C master
+
+maintainers:
+  - Conor Culhane <conor.culhane@silvaco.com>
+
+properties:
+  compatible:
+    const: silvaco,i3c-master
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: pclk, the system clock
+      - description: fast_clk, for the bus
+      - description: slow_clk, for other events
+
+  clock-names:
+    minItems: 3
+    maxItems: 3
+
+  resets:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clock-names
+  - clocks
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    i3c-master@a0000000 {
+        compatible = "silvaco,i3c-master";
+        clocks = <&zynqmp_clk 71>, <&fclk>, <&sclk>;
+        clock-names = "pclk", "fast_clk", "slow_clk";
+        interrupt-parent = <&gic>;
+        interrupts = <0 89 4>;
+        reg = <0xa0000000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };
-- 
2.20.1


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^ permalink raw reply	[flat|nested] 7+ messages in thread

* [PATCH v3 3/4] i3c: master: svc: Add Silvaco I3C master driver
  2020-12-28 16:11 [PATCH v3 0/4] Silvaco I3C master driver Miquel Raynal
  2020-12-28 16:11 ` [PATCH v3 1/4] dt-bindings: Add vendor prefix for Silvaco Miquel Raynal
  2020-12-28 16:11 ` [PATCH v3 2/4] dt-bindings: i3c: Describe Silvaco master binding Miquel Raynal
@ 2020-12-28 16:11 ` Miquel Raynal
  2020-12-28 16:11 ` [PATCH v3 4/4] MAINTAINERS: Add Silvaco I3C master Miquel Raynal
  3 siblings, 0 replies; 7+ messages in thread
From: Miquel Raynal @ 2020-12-28 16:11 UTC (permalink / raw)
  To: Alexandre Belloni, linux-i3c
  Cc: devicetree, Rajeev Huralikoppi, Nicolas Pitre, Rob Herring,
	Thomas Petazzoni, Miquel Raynal, Conor Culhane

Add support for Silvaco I3C dual-role IP. The master role is supported
in SDR mode only. I2C transfers have not been tested but are shared
because they are very close to the I3C transfers in terms of register
configuration.

The IBI processing follows this logic:
- When a slave advertizes an interrupt (SDA pulled low) an interrupt
  gets generated by the master. This time is unbounded and may be
  deferred.
- The IRQ handler itself does not process anything: it only queues a
  work that will be run in non-atomic context. This is needed because
  short wait periods must be experienced.
- The IBI job is divided in two parts: the first one is "critical" in
  the sense that it may not support getting interrupted. If this
  happens, after this first section the driver checks the master error
  register and depending on its content either flushes everything and
  errors out, or ends the processing (this second section may be
  interrupted).
- If the critical section got interrupted, the slave will
  automatically respin it's IBI request when it will be allowed to.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/i3c/master/Kconfig          |    8 +
 drivers/i3c/master/Makefile         |    1 +
 drivers/i3c/master/svc-i3c-master.c | 1478 +++++++++++++++++++++++++++
 3 files changed, 1487 insertions(+)
 create mode 100644 drivers/i3c/master/svc-i3c-master.c

diff --git a/drivers/i3c/master/Kconfig b/drivers/i3c/master/Kconfig
index e68f15f4b4d0..eb6ac7aa307b 100644
--- a/drivers/i3c/master/Kconfig
+++ b/drivers/i3c/master/Kconfig
@@ -22,6 +22,14 @@ config DW_I3C_MASTER
 	  This driver can also be built as a module.  If so, the module
 	  will be called dw-i3c-master.
 
+config SVC_I3C_MASTER
+	tristate "Silvaco I3C Dual-Role Master driver"
+	depends on I3C
+	depends on HAS_IOMEM
+	depends on !(ALPHA || PARISC)
+	help
+	  Support for Silvaco I3C Dual-Role Master Controller.
+
 config MIPI_I3C_HCI
 	tristate "MIPI I3C Host Controller Interface driver (EXPERIMENTAL)"
 	depends on I3C
diff --git a/drivers/i3c/master/Makefile b/drivers/i3c/master/Makefile
index b892fd4cafad..b3fee0f690b2 100644
--- a/drivers/i3c/master/Makefile
+++ b/drivers/i3c/master/Makefile
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_CDNS_I3C_MASTER)		+= i3c-master-cdns.o
 obj-$(CONFIG_DW_I3C_MASTER)		+= dw-i3c-master.o
+obj-$(CONFIG_SVC_I3C_MASTER)		+= svc-i3c-master.o
 obj-$(CONFIG_MIPI_I3C_HCI)		+= mipi-i3c-hci/
diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
new file mode 100644
index 000000000000..8d990696676e
--- /dev/null
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -0,0 +1,1478 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Silvaco dual-role I3C master driver
+ *
+ * Copyright (C) 2020 Silvaco
+ * Author: Miquel RAYNAL <miquel.raynal@bootlin.com>
+ * Based on a work from: Conor Culhane <conor.culhane@silvaco.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/errno.h>
+#include <linux/i3c/master.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+/* Master Mode Registers */
+#define SVC_I3C_MCONFIG      0x000
+#define   SVC_I3C_MCONFIG_MASTER_EN BIT(0)
+#define   SVC_I3C_MCONFIG_DISTO(x) FIELD_PREP(BIT(3), (x))
+#define   SVC_I3C_MCONFIG_HKEEP(x) FIELD_PREP(GENMASK(5, 4), (x))
+#define   SVC_I3C_MCONFIG_ODSTOP(x) FIELD_PREP(BIT(6), (x))
+#define   SVC_I3C_MCONFIG_PPBAUD(x) FIELD_PREP(GENMASK(11, 8), (x))
+#define   SVC_I3C_MCONFIG_PPLOW(x) FIELD_PREP(GENMASK(15, 12), (x))
+#define   SVC_I3C_MCONFIG_ODBAUD(x) FIELD_PREP(GENMASK(23, 16), (x))
+#define   SVC_I3C_MCONFIG_ODHPP(x) FIELD_PREP(BIT(24), (x))
+#define   SVC_I3C_MCONFIG_SKEW(x) FIELD_PREP(GENMASK(27, 25), (x))
+#define   SVC_I3C_MCONFIG_I2CBAUD(x) FIELD_PREP(GENMASK(31, 28), (x))
+
+#define SVC_I3C_MCTRL        0x084
+#define   SVC_I3C_MCTRL_REQUEST_MASK GENMASK(2, 0)
+#define   SVC_I3C_MCTRL_REQUEST_NONE 0
+#define   SVC_I3C_MCTRL_REQUEST_START_ADDR 1
+#define   SVC_I3C_MCTRL_REQUEST_STOP 2
+#define   SVC_I3C_MCTRL_REQUEST_IBI_ACKNACK 3
+#define   SVC_I3C_MCTRL_REQUEST_PROC_DAA 4
+#define   SVC_I3C_MCTRL_REQUEST_AUTO_IBI 7
+#define   SVC_I3C_MCTRL_TYPE_I3C 0
+#define   SVC_I3C_MCTRL_TYPE_I2C BIT(4)
+#define   SVC_I3C_MCTRL_IBIRESP_AUTO 0
+#define   SVC_I3C_MCTRL_IBIRESP_ACK_WITHOUT_BYTE 0
+#define   SVC_I3C_MCTRL_IBIRESP_ACK_WITH_BYTE BIT(7)
+#define   SVC_I3C_MCTRL_IBIRESP_NACK BIT(6)
+#define   SVC_I3C_MCTRL_IBIRESP_MANUAL GENMASK(7, 6)
+#define   SVC_I3C_MCTRL_DIR(x) FIELD_PREP(BIT(8), (x))
+#define   SVC_I3C_MCTRL_DIR_WRITE 0
+#define   SVC_I3C_MCTRL_DIR_READ 1
+#define   SVC_I3C_MCTRL_ADDR(x) FIELD_PREP(GENMASK(15, 9), (x))
+#define   SVC_I3C_MCTRL_RDTERM(x) FIELD_PREP(GENMASK(23, 16), (x))
+
+#define SVC_I3C_MSTATUS      0x088
+#define   SVC_I3C_MSTATUS_STATE(x) FIELD_GET(GENMASK(2, 0), (x))
+#define   SVC_I3C_MSTATUS_STATE_DAA(x) (SVC_I3C_MSTATUS_STATE(x) == 5)
+#define   SVC_I3C_MSTATUS_STATE_IDLE(x) (SVC_I3C_MSTATUS_STATE(x) == 0)
+#define   SVC_I3C_MSTATUS_BETWEEN(x) FIELD_GET(BIT(4), (x))
+#define   SVC_I3C_MSTATUS_NACKED(x) FIELD_GET(BIT(5), (x))
+#define   SVC_I3C_MSTATUS_IBITYPE(x) FIELD_GET(GENMASK(7, 6), (x))
+#define   SVC_I3C_MSTATUS_IBITYPE_IBI 1
+#define   SVC_I3C_MSTATUS_IBITYPE_MASTER_REQUEST 2
+#define   SVC_I3C_MSTATUS_IBITYPE_HOT_JOIN 3
+#define   SVC_I3C_MINT_SLVSTART BIT(8)
+#define   SVC_I3C_MINT_MCTRLDONE BIT(9)
+#define   SVC_I3C_MINT_COMPLETE BIT(10)
+#define   SVC_I3C_MINT_RXPEND BIT(11)
+#define   SVC_I3C_MINT_TXNOTFULL BIT(12)
+#define   SVC_I3C_MINT_IBIWON BIT(13)
+#define   SVC_I3C_MINT_ERRWARN BIT(15)
+#define   SVC_I3C_MSTATUS_SLVSTART(x) FIELD_GET(SVC_I3C_MINT_SLVSTART, (x))
+#define   SVC_I3C_MSTATUS_MCTRLDONE(x) FIELD_GET(SVC_I3C_MINT_MCTRLDONE, (x))
+#define   SVC_I3C_MSTATUS_COMPLETE(x) FIELD_GET(SVC_I3C_MINT_COMPLETE, (x))
+#define   SVC_I3C_MSTATUS_RXPEND(x) FIELD_GET(SVC_I3C_MINT_RXPEND, (x))
+#define   SVC_I3C_MSTATUS_TXNOTFULL(x) FIELD_GET(SVC_I3C_MINT_TXNOTFULL, (x))
+#define   SVC_I3C_MSTATUS_IBIWON(x) FIELD_GET(SVC_I3C_MINT_IBIWON, (x))
+#define   SVC_I3C_MSTATUS_ERRWARN(x) FIELD_GET(SVC_I3C_MINT_ERRWARN, (x))
+#define   SVC_I3C_MSTATUS_IBIADDR(x) FIELD_GET(GENMASK(30, 24), (x))
+
+#define SVC_I3C_IBIRULES     0x08C
+#define   SVC_I3C_IBIRULES_ADDR(slot, addr) FIELD_PREP(GENMASK(29, 0), \
+						       ((addr) & 0x3F) << ((slot) * 6))
+#define   SVC_I3C_IBIRULES_ADDRS 5
+#define   SVC_I3C_IBIRULES_MSB0 BIT(30)
+#define   SVC_I3C_IBIRULES_NOBYTE BIT(31)
+#define   SVC_I3C_IBIRULES_MANDBYTE 0
+#define SVC_I3C_MINTSET      0x090
+#define SVC_I3C_MINTCLR      0x094
+#define SVC_I3C_MINTMASKED   0x098
+#define SVC_I3C_MERRWARN     0x09C
+#define SVC_I3C_MDMACTRL     0x0A0
+#define SVC_I3C_MDATACTRL    0x0AC
+#define   SVC_I3C_MDATACTRL_FLUSHTB BIT(0)
+#define   SVC_I3C_MDATACTRL_FLUSHRB BIT(1)
+#define   SVC_I3C_MDATACTRL_UNLOCK_TRIG BIT(3)
+#define   SVC_I3C_MDATACTRL_TXTRIG_FIFO_NOT_FULL GENMASK(5, 4)
+#define   SVC_I3C_MDATACTRL_RXTRIG_FIFO_NOT_EMPTY 0
+#define   SVC_I3C_MDATACTRL_RXCOUNT(x) FIELD_GET(GENMASK(28, 24), (x))
+#define   SVC_I3C_MDATACTRL_TXFULL BIT(30)
+#define   SVC_I3C_MDATACTRL_RXEMPTY BIT(31)
+
+#define SVC_I3C_MWDATAB      0x0B0
+#define   SVC_I3C_MWDATAB_END BIT(8)
+
+#define SVC_I3C_MWDATABE     0x0B4
+#define SVC_I3C_MWDATAH      0x0B8
+#define SVC_I3C_MWDATAHE     0x0BC
+#define SVC_I3C_MRDATAB      0x0C0
+#define SVC_I3C_MRDATAH      0x0C8
+#define SVC_I3C_MWMSG_SDR    0x0D0
+#define SVC_I3C_MRMSG_SDR    0x0D4
+#define SVC_I3C_MWMSG_DDR    0x0D8
+#define SVC_I3C_MRMSG_DDR    0x0DC
+
+#define SVC_I3C_MDYNADDR     0x0E4
+#define   SVC_MDYNADDR_VALID BIT(0)
+#define   SVC_MDYNADDR_ADDR(x) FIELD_PREP(GENMASK(7, 1), (x))
+
+#define SVC_I3C_MAX_DEVS 32
+
+/* This parameter depends on the implementation and may be tuned */
+#define SVC_I3C_FIFO_SIZE 16
+
+struct svc_i3c_cmd {
+	u8 addr;
+	bool rnw;
+	u8 *in;
+	const void *out;
+	unsigned int len;
+	unsigned int read_len;
+	bool continued;
+};
+
+struct svc_i3c_xfer {
+	struct list_head node;
+	struct completion comp;
+	int ret;
+	unsigned int type;
+	unsigned int ncmds;
+	struct svc_i3c_cmd cmds[];
+};
+
+/**
+ * struct svc_i3c_master - Silvaco I3C Master structure
+ * @base: I3C master controller
+ * @dev: Corresponding device
+ * @regs: Memory mapping
+ * @free_slots: Bit array of available slots
+ * @addrs: Array containing the dynamic addresses of each attached device
+ * @descs: Array of descriptors, one per attached device
+ * @hj_work: Hot-join work
+ * @ibi_work: IBI work
+ * @irq: Main interrupt
+ * @pclk: System clock
+ * @fclk: Fast clock (bus)
+ * @sclk: Slow clock (other events)
+ * @xferqueue: Transfer queue structure
+ * @xferqueue.list: List member
+ * @xferqueue.cur: Current ongoing transfer
+ * @xferqueue.lock: Queue lock
+ * @ibi: IBI structure
+ * @ibi.num_slots: Number of slots available in @ibi.slots
+ * @ibi.slots: Available IBI slots
+ * @ibi.tbq_slot: To be queued IBI slot
+ * @ibi.lock: IBI lock
+ */
+struct svc_i3c_master {
+	struct i3c_master_controller base;
+	struct device *dev;
+	void __iomem *regs;
+	u32 free_slots;
+	u8 addrs[SVC_I3C_MAX_DEVS];
+	struct i3c_dev_desc *descs[SVC_I3C_MAX_DEVS];
+	struct work_struct hj_work;
+	struct work_struct ibi_work;
+	int irq;
+	struct clk *pclk;
+	struct clk *fclk;
+	struct clk *sclk;
+	struct {
+		struct list_head list;
+		struct svc_i3c_xfer *cur;
+		/* Prevent races between transfers */
+		spinlock_t lock;
+	} xferqueue;
+	struct {
+		unsigned int num_slots;
+		struct i3c_dev_desc **slots;
+		struct i3c_ibi_slot *tbq_slot;
+		/* Prevent races within IBI handlers */
+		spinlock_t lock;
+	} ibi;
+};
+
+/**
+ * struct svc_i3c_i3c_dev_data - Device specific data
+ * @index: Index in the master tables corresponding to this device
+ * @ibi: IBI slot index in the master structure
+ * @ibi_pool: IBI pool associated to this device
+ */
+struct svc_i3c_i2c_dev_data {
+	u8 index;
+	int ibi;
+	struct i3c_generic_ibi_pool *ibi_pool;
+};
+
+static bool svc_i3c_master_error(struct svc_i3c_master *master)
+{
+	u32 mstatus, merrwarn;
+
+	mstatus = readl(master->regs + SVC_I3C_MSTATUS);
+	if (SVC_I3C_MSTATUS_ERRWARN(mstatus)) {
+		merrwarn = readl(master->regs + SVC_I3C_MERRWARN);
+		writel(merrwarn, master->regs + SVC_I3C_MERRWARN);
+		dev_err(master->dev,
+			"Error condition: MSTATUS 0x%08x, MERRWARN 0x%08x\n",
+			mstatus, merrwarn);
+
+		return true;
+	}
+
+	return false;
+}
+
+static void svc_i3c_master_enable_interrupts(struct svc_i3c_master *master, u32 mask)
+{
+	writel(mask, master->regs + SVC_I3C_MINTSET);
+}
+
+static void svc_i3c_master_disable_interrupts(struct svc_i3c_master *master)
+{
+	u32 mask = readl(master->regs + SVC_I3C_MINTSET);
+
+	writel(mask, master->regs + SVC_I3C_MINTCLR);
+}
+
+static inline struct svc_i3c_master *
+to_svc_i3c_master(struct i3c_master_controller *master)
+{
+	return container_of(master, struct svc_i3c_master, base);
+}
+
+static void svc_i3c_master_hj_work(struct work_struct *work)
+{
+	struct svc_i3c_master *master;
+
+	master = container_of(work, struct svc_i3c_master, hj_work);
+	i3c_master_do_daa(&master->base);
+}
+
+static struct i3c_dev_desc *
+svc_i3c_master_dev_from_addr(struct svc_i3c_master *master,
+			     unsigned int ibiaddr)
+{
+	int i;
+
+	for (i = 0; i < SVC_I3C_MAX_DEVS; i++)
+		if (master->addrs[i] == ibiaddr)
+			break;
+
+	if (i == SVC_I3C_MAX_DEVS)
+		return NULL;
+
+	return master->descs[i];
+}
+
+static void svc_i3c_master_emit_stop(struct svc_i3c_master *master)
+{
+	writel(SVC_I3C_MCTRL_REQUEST_STOP, master->regs + SVC_I3C_MCTRL);
+
+	/*
+	 * This delay is necessary after the emission of a stop, otherwise eg.
+	 * repeating IBIs do not get detected. There is a note in the manual
+	 * about it, stating that the stop condition might not be settled
+	 * correctly if a start condition follows too rapidly.
+	 */
+	udelay(1);
+}
+
+static void svc_i3c_master_clear_merrwarn(struct svc_i3c_master *master)
+{
+	writel(readl(master->regs + SVC_I3C_MERRWARN),
+	       master->regs + SVC_I3C_MERRWARN);
+}
+
+static int svc_i3c_master_handle_ibi(struct svc_i3c_master *master,
+				     struct i3c_dev_desc *dev)
+{
+	struct svc_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
+	struct i3c_ibi_slot *slot;
+	unsigned int count;
+	u32 mdatactrl;
+	u8 *buf;
+
+	slot = i3c_generic_ibi_get_free_slot(data->ibi_pool);
+	if (!slot)
+		return -ENOSPC;
+
+	slot->len = 0;
+	buf = slot->data;
+
+	while (SVC_I3C_MSTATUS_RXPEND(readl(master->regs + SVC_I3C_MSTATUS))  &&
+	       slot->len < SVC_I3C_FIFO_SIZE) {
+		mdatactrl = readl(master->regs + SVC_I3C_MDATACTRL);
+		count = SVC_I3C_MDATACTRL_RXCOUNT(mdatactrl);
+		readsl(master->regs + SVC_I3C_MRDATAB, buf, count);
+		slot->len += count;
+		buf += count;
+	}
+
+	master->ibi.tbq_slot = slot;
+
+	return 0;
+}
+
+static void svc_i3c_master_ack_ibi(struct svc_i3c_master *master,
+				   bool mandatory_byte)
+{
+	unsigned int ibi_ack_nack;
+
+	ibi_ack_nack = SVC_I3C_MCTRL_REQUEST_IBI_ACKNACK;
+	if (mandatory_byte)
+		ibi_ack_nack |= SVC_I3C_MCTRL_IBIRESP_ACK_WITH_BYTE;
+	else
+		ibi_ack_nack |= SVC_I3C_MCTRL_IBIRESP_ACK_WITHOUT_BYTE;
+
+	writel(ibi_ack_nack, master->regs + SVC_I3C_MCTRL);
+}
+
+static void svc_i3c_master_nack_ibi(struct svc_i3c_master *master)
+{
+	writel(SVC_I3C_MCTRL_REQUEST_IBI_ACKNACK |
+	       SVC_I3C_MCTRL_IBIRESP_NACK,
+	       master->regs + SVC_I3C_MCTRL);
+}
+
+static void svc_i3c_master_ibi_work(struct work_struct *work)
+{
+	struct svc_i3c_master *master = container_of(work, struct svc_i3c_master, ibi_work);
+	struct svc_i3c_i2c_dev_data *data;
+	unsigned int ibitype, ibiaddr;
+	struct i3c_dev_desc *dev;
+	u32 status, val;
+	int ret;
+
+	/* Acknowledge the incoming interrupt with the AUTOIBI mechanism */
+	writel(SVC_I3C_MCTRL_REQUEST_AUTO_IBI |
+	       SVC_I3C_MCTRL_IBIRESP_AUTO,
+	       master->regs + SVC_I3C_MCTRL);
+
+	/* Wait for IBIWON, should take approximately 100us */
+	ret = readl_relaxed_poll_timeout(master->regs + SVC_I3C_MSTATUS, val,
+					 SVC_I3C_MSTATUS_IBIWON(val), 0, 1000);
+	if (ret) {
+		dev_err(master->dev, "Timeout when polling for IBIWON\n");
+		goto reenable_ibis;
+	}
+
+	/* Clear the interrupt status */
+	writel(SVC_I3C_MINT_IBIWON, master->regs + SVC_I3C_MSTATUS);
+
+	status = readl(master->regs + SVC_I3C_MSTATUS);
+	ibitype = SVC_I3C_MSTATUS_IBITYPE(status);
+	ibiaddr = SVC_I3C_MSTATUS_IBIADDR(status);
+
+	/* Handle the critical responses to IBI's */
+	switch (ibitype) {
+	case SVC_I3C_MSTATUS_IBITYPE_IBI:
+		dev = svc_i3c_master_dev_from_addr(master, ibiaddr);
+		if (!dev)
+			svc_i3c_master_nack_ibi(master);
+		else
+			svc_i3c_master_handle_ibi(master, dev);
+		break;
+	case SVC_I3C_MSTATUS_IBITYPE_HOT_JOIN:
+		svc_i3c_master_ack_ibi(master, false);
+		break;
+	case SVC_I3C_MSTATUS_IBITYPE_MASTER_REQUEST:
+		svc_i3c_master_nack_ibi(master);
+		break;
+	default:
+		break;
+	}
+
+	/*
+	 * If an error happened, we probably got interrupted and the exchange
+	 * timedout. In this case we just drop everything, emit a stop and wait
+	 * for the slave to interrupt again.
+	 */
+	if (svc_i3c_master_error(master)) {
+		if (master->ibi.tbq_slot) {
+			data = i3c_dev_get_master_data(dev);
+			i3c_generic_ibi_recycle_slot(data->ibi_pool,
+						     master->ibi.tbq_slot);
+			master->ibi.tbq_slot = NULL;
+		}
+
+		svc_i3c_master_emit_stop(master);
+
+		goto reenable_ibis;
+	}
+
+	/* Handle the non critical tasks */
+	switch (ibitype) {
+	case SVC_I3C_MSTATUS_IBITYPE_IBI:
+		if (dev) {
+			i3c_master_queue_ibi(dev, master->ibi.tbq_slot);
+			master->ibi.tbq_slot = NULL;
+		}
+		svc_i3c_master_emit_stop(master);
+		break;
+	case SVC_I3C_MSTATUS_IBITYPE_HOT_JOIN:
+		queue_work(master->base.wq, &master->hj_work);
+		break;
+	case SVC_I3C_MSTATUS_IBITYPE_MASTER_REQUEST:
+	default:
+		break;
+	}
+
+reenable_ibis:
+	svc_i3c_master_enable_interrupts(master, SVC_I3C_MINT_SLVSTART);
+}
+
+static irqreturn_t svc_i3c_master_irq_handler(int irq, void *dev_id)
+{
+	struct svc_i3c_master *master = (struct svc_i3c_master *)dev_id;
+	u32 active = readl(master->regs + SVC_I3C_MINTMASKED);
+
+	if (!SVC_I3C_MSTATUS_SLVSTART(active))
+		return IRQ_NONE;
+
+	/* Clear the interrupt status */
+	writel(SVC_I3C_MINT_SLVSTART, master->regs + SVC_I3C_MSTATUS);
+
+	svc_i3c_master_disable_interrupts(master);
+
+	/* Handle the interrupt in a non atomic context */
+	queue_work(master->base.wq, &master->ibi_work);
+
+	return IRQ_HANDLED;
+}
+
+static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
+{
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	struct i3c_bus *bus = i3c_master_get_bus(m);
+	struct i3c_device_info info = {};
+	unsigned long fclk_rate, fclk_period_ns;
+	unsigned int high_period_ns, od_low_period_ns;
+	u32 ppbaud, pplow, odhpp, odbaud, i2cbaud, reg;
+	int ret;
+
+	/* Timings derivation */
+	fclk_rate = clk_get_rate(master->fclk);
+	if (!fclk_rate)
+		return -EINVAL;
+
+	fclk_period_ns = DIV_ROUND_UP(1000000000, fclk_rate);
+
+	/*
+	 * Using I3C Push-Pull mode, target is 12.5MHz/80ns period.
+	 * Simplest configuration is using a 50% duty-cycle of 40ns.
+	 */
+	ppbaud = DIV_ROUND_UP(40, fclk_period_ns) - 1;
+	pplow = 0;
+
+	/*
+	 * Using I3C Open-Drain mode, target is 4.17MHz/240ns with a
+	 * duty-cycle tuned so that high levels are filetered out by
+	 * the 50ns filter (target being 40ns).
+	 */
+	odhpp = 1;
+	high_period_ns = (ppbaud + 1) * fclk_period_ns;
+	odbaud = DIV_ROUND_UP(240 - high_period_ns, high_period_ns) - 1;
+	od_low_period_ns = (odbaud + 1) * high_period_ns;
+
+	switch (bus->mode) {
+	case I3C_BUS_MODE_PURE:
+		i2cbaud = 0;
+		break;
+	case I3C_BUS_MODE_MIXED_FAST:
+	case I3C_BUS_MODE_MIXED_LIMITED:
+		/*
+		 * Using I2C Fm+ mode, target is 1MHz/1000ns, the difference
+		 * between the high and low period does not really matter.
+		 */
+		i2cbaud = DIV_ROUND_UP(1000, od_low_period_ns) - 2;
+		break;
+	case I3C_BUS_MODE_MIXED_SLOW:
+		/*
+		 * Using I2C Fm mode, target is 0.4MHz/2500ns, with the same
+		 * constraints as the FM+ mode.
+		 */
+		i2cbaud = DIV_ROUND_UP(2500, od_low_period_ns) - 2;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	reg = SVC_I3C_MCONFIG_MASTER_EN |
+	      SVC_I3C_MCONFIG_DISTO(0) |
+	      SVC_I3C_MCONFIG_HKEEP(0) |
+	      SVC_I3C_MCONFIG_ODSTOP(0) |
+	      SVC_I3C_MCONFIG_PPBAUD(ppbaud) |
+	      SVC_I3C_MCONFIG_PPLOW(pplow) |
+	      SVC_I3C_MCONFIG_ODBAUD(odbaud) |
+	      SVC_I3C_MCONFIG_ODHPP(odhpp) |
+	      SVC_I3C_MCONFIG_SKEW(0) |
+	      SVC_I3C_MCONFIG_I2CBAUD(i2cbaud);
+	writel(reg, master->regs + SVC_I3C_MCONFIG);
+
+	/* Master core's registration */
+	ret = i3c_master_get_free_addr(m, 0);
+	if (ret < 0)
+		return ret;
+
+	info.dyn_addr = ret;
+
+	writel(SVC_MDYNADDR_VALID | SVC_MDYNADDR_ADDR(info.dyn_addr),
+	       master->regs + SVC_I3C_MDYNADDR);
+
+	ret = i3c_master_set_info(&master->base, &info);
+	if (ret)
+		return ret;
+
+	svc_i3c_master_enable_interrupts(master, SVC_I3C_MINT_SLVSTART);
+
+	return 0;
+}
+
+static void svc_i3c_master_bus_cleanup(struct i3c_master_controller *m)
+{
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+
+	svc_i3c_master_disable_interrupts(master);
+
+	/* Disable master */
+	writel(0, master->regs + SVC_I3C_MCONFIG);
+}
+
+static int svc_i3c_master_reserve_slot(struct svc_i3c_master *master)
+{
+	unsigned int slot;
+
+	if (!(master->free_slots & GENMASK(SVC_I3C_MAX_DEVS - 1, 0)))
+		return -ENOSPC;
+
+	slot = ffs(master->free_slots) - 1;
+
+	master->free_slots &= ~BIT(slot);
+
+	return slot;
+}
+
+static void svc_i3c_master_release_slot(struct svc_i3c_master *master,
+					unsigned int slot)
+{
+	master->free_slots |= BIT(slot);
+}
+
+static int svc_i3c_master_attach_i3c_dev(struct i3c_dev_desc *dev)
+{
+	struct i3c_master_controller *m = i3c_dev_get_master(dev);
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	struct svc_i3c_i2c_dev_data *data;
+	int slot;
+
+	slot = svc_i3c_master_reserve_slot(master);
+	if (slot < 0)
+		return slot;
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		svc_i3c_master_release_slot(master, slot);
+		return -ENOMEM;
+	}
+
+	data->ibi = -1;
+	data->index = slot;
+	master->addrs[slot] = dev->info.dyn_addr ? dev->info.dyn_addr :
+						   dev->info.static_addr;
+	master->descs[slot] = dev;
+
+	i3c_dev_set_master_data(dev, data);
+
+	return 0;
+}
+
+static int svc_i3c_master_reattach_i3c_dev(struct i3c_dev_desc *dev,
+					   u8 old_dyn_addr)
+{
+	struct i3c_master_controller *m = i3c_dev_get_master(dev);
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	struct svc_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
+
+	master->addrs[data->index] = dev->info.dyn_addr ? dev->info.dyn_addr :
+							  dev->info.static_addr;
+
+	return 0;
+}
+
+static void svc_i3c_master_detach_i3c_dev(struct i3c_dev_desc *dev)
+{
+	struct svc_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
+	struct i3c_master_controller *m = i3c_dev_get_master(dev);
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+
+	master->addrs[data->index] = 0;
+	svc_i3c_master_release_slot(master, data->index);
+
+	kfree(data);
+}
+
+static int svc_i3c_master_attach_i2c_dev(struct i2c_dev_desc *dev)
+{
+	struct i3c_master_controller *m = i2c_dev_get_master(dev);
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	struct svc_i3c_i2c_dev_data *data;
+	int slot;
+
+	slot = svc_i3c_master_reserve_slot(master);
+	if (slot < 0)
+		return slot;
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		svc_i3c_master_release_slot(master, slot);
+		return -ENOMEM;
+	}
+
+	data->index = slot;
+	master->addrs[slot] = dev->addr;
+
+	i2c_dev_set_master_data(dev, data);
+
+	return 0;
+}
+
+static void svc_i3c_master_detach_i2c_dev(struct i2c_dev_desc *dev)
+{
+	struct svc_i3c_i2c_dev_data *data = i2c_dev_get_master_data(dev);
+	struct i3c_master_controller *m = i2c_dev_get_master(dev);
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+
+	svc_i3c_master_release_slot(master, data->index);
+
+	kfree(data);
+}
+
+static int svc_i3c_master_readb(struct svc_i3c_master *master, u8 *dst,
+				unsigned int len)
+{
+	int ret, i;
+	u32 reg;
+
+	for (i = 0; i < len; i++) {
+		ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
+					 SVC_I3C_MSTATUS_RXPEND(reg), 0, 1000);
+		if (ret)
+			return ret;
+
+		dst[i] = readl(master->regs + SVC_I3C_MRDATAB);
+	}
+
+	return 0;
+}
+
+static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
+					u8 *addrs, unsigned int *count)
+{
+	u64 prov_id[SVC_I3C_MAX_DEVS] = {}, nacking_prov_id = 0;
+	unsigned int dev_nb = 0, last_addr = 0;
+	u32 reg;
+	int ret, i;
+
+	while (true) {
+		/* Enter/proceed with DAA */
+		writel(SVC_I3C_MCTRL_REQUEST_PROC_DAA |
+		       SVC_I3C_MCTRL_TYPE_I3C |
+		       SVC_I3C_MCTRL_IBIRESP_NACK |
+		       SVC_I3C_MCTRL_DIR(SVC_I3C_MCTRL_DIR_WRITE),
+		       master->regs + SVC_I3C_MCTRL);
+
+		/*
+		 * Either one slave will send its ID, or the assignment process
+		 * is done.
+		 */
+		ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
+					 SVC_I3C_MSTATUS_RXPEND(reg) |
+					 SVC_I3C_MSTATUS_MCTRLDONE(reg),
+					 1, 1000);
+		if (ret)
+			return ret;
+
+		if (SVC_I3C_MSTATUS_RXPEND(reg)) {
+			u8 data[6];
+
+			/*
+			 * We only care about the 48-bit provisional ID yet to
+			 * be sure a device does not nack an address twice.
+			 * Otherwise, we would just need to flush the RX FIFO.
+			 */
+			ret = svc_i3c_master_readb(master, data, 6);
+			if (ret)
+				return ret;
+
+			for (i = 0; i < 6; i++)
+				prov_id[dev_nb] |= (u64)(data[i]) << (8 * (5 - i));
+
+			/* We do not care about the BCR and DCR yet */
+			ret = svc_i3c_master_readb(master, data, 2);
+			if (ret)
+				return ret;
+		} else if (SVC_I3C_MSTATUS_MCTRLDONE(reg)) {
+			if (SVC_I3C_MSTATUS_STATE_IDLE(reg) &&
+			    SVC_I3C_MSTATUS_COMPLETE(reg)) {
+				/*
+				 * All devices received and acked they dynamic
+				 * address, this is the natural end of the DAA
+				 * procedure.
+				 */
+				break;
+			} else if (SVC_I3C_MSTATUS_NACKED(reg)) {
+				/*
+				 * A slave device nacked the address, this is
+				 * allowed only once, DAA will be stopped and
+				 * then resumed. The same device is supposed to
+				 * answer again immediately and shall ack the
+				 * address this time.
+				 */
+				if (prov_id[dev_nb] == nacking_prov_id)
+					return -EIO;
+
+				dev_nb--;
+				nacking_prov_id = prov_id[dev_nb];
+				svc_i3c_master_emit_stop(master);
+
+				continue;
+			} else {
+				return -EIO;
+			}
+		}
+
+		/* Wait for the slave to be ready to receive its address */
+		ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
+					 SVC_I3C_MSTATUS_MCTRLDONE(reg) &&
+					 SVC_I3C_MSTATUS_STATE_DAA(reg) &&
+					 SVC_I3C_MSTATUS_BETWEEN(reg),
+					 0, 1000);
+		if (ret)
+			return ret;
+
+		/* Give the slave device a suitable dynamic address */
+		ret = i3c_master_get_free_addr(&master->base, last_addr + 1);
+		if (ret < 0)
+			return ret;
+
+		addrs[dev_nb] = ret;
+		dev_dbg(master->dev, "DAA: device %d assigned to 0x%02x\n",
+			dev_nb, addrs[dev_nb]);
+
+		writel(addrs[dev_nb], master->regs + SVC_I3C_MWDATAB);
+		last_addr = addrs[dev_nb++];
+	}
+
+	*count = dev_nb;
+
+	return 0;
+}
+
+static int svc_i3c_update_ibirules(struct svc_i3c_master *master)
+{
+	struct i3c_dev_desc *dev;
+	u32 reg_mbyte = 0, reg_nobyte = SVC_I3C_IBIRULES_NOBYTE;
+	unsigned int mbyte_addr_ok = 0, mbyte_addr_ko = 0, nobyte_addr_ok = 0,
+		nobyte_addr_ko = 0;
+	bool list_mbyte = false, list_nobyte = false;
+
+	/* Create the IBIRULES register for both cases */
+	i3c_bus_for_each_i3cdev(&master->base.bus, dev) {
+		if (I3C_BCR_DEVICE_ROLE(dev->info.bcr) == I3C_BCR_I3C_MASTER)
+			continue;
+
+		if (dev->info.bcr & I3C_BCR_IBI_PAYLOAD) {
+			reg_mbyte |= SVC_I3C_IBIRULES_ADDR(mbyte_addr_ok,
+							   dev->info.dyn_addr);
+
+			/* IBI rules cannot be applied to devices with MSb=1 */
+			if (dev->info.dyn_addr & BIT(7))
+				mbyte_addr_ko++;
+			else
+				mbyte_addr_ok++;
+		} else {
+			reg_nobyte |= SVC_I3C_IBIRULES_ADDR(nobyte_addr_ok,
+							    dev->info.dyn_addr);
+
+			/* IBI rules cannot be applied to devices with MSb=1 */
+			if (dev->info.dyn_addr & BIT(7))
+				nobyte_addr_ko++;
+			else
+				nobyte_addr_ok++;
+		}
+	}
+
+	/* Device list cannot be handled by hardware */
+	if (!mbyte_addr_ko && mbyte_addr_ok <= SVC_I3C_IBIRULES_ADDRS)
+		list_mbyte = true;
+
+	if (!nobyte_addr_ko && nobyte_addr_ok <= SVC_I3C_IBIRULES_ADDRS)
+		list_nobyte = true;
+
+	/* No list can be properly handled, return an error */
+	if (!list_mbyte && !list_nobyte)
+		return -ERANGE;
+
+	/* Pick the first list that can be handled by hardware, randomly */
+	if (list_mbyte)
+		writel(reg_mbyte, master->regs + SVC_I3C_IBIRULES);
+	else
+		writel(reg_nobyte, master->regs + SVC_I3C_IBIRULES);
+
+	return 0;
+}
+
+static int svc_i3c_master_do_daa(struct i3c_master_controller *m)
+{
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	u8 addrs[SVC_I3C_MAX_DEVS];
+	unsigned long flags;
+	unsigned int dev_nb;
+	int ret, i;
+
+	spin_lock_irqsave(&master->xferqueue.lock, flags);
+	ret = svc_i3c_master_do_daa_locked(master, addrs, &dev_nb);
+	spin_unlock_irqrestore(&master->xferqueue.lock, flags);
+	if (ret)
+		goto emit_stop;
+
+	/* Register all devices who participated to the core */
+	for (i = 0; i < dev_nb; i++) {
+		ret = i3c_master_add_i3c_dev_locked(m, addrs[i]);
+		if (ret)
+			return ret;
+	}
+
+	/* Configure IBI auto-rules */
+	ret = svc_i3c_update_ibirules(master);
+	if (ret) {
+		dev_err(master->dev, "Cannot handle such a list of devices");
+		return ret;
+	}
+
+	return 0;
+
+emit_stop:
+	svc_i3c_master_emit_stop(master);
+	svc_i3c_master_clear_merrwarn(master);
+
+	return ret;
+}
+
+static int svc_i3c_master_read(struct svc_i3c_master *master,
+			       u8 *in, unsigned int len)
+{
+	int offset = 0, i, ret;
+	u32 mdctrl;
+
+	while (offset < len) {
+		unsigned int count;
+
+		ret = readl_poll_timeout(master->regs + SVC_I3C_MDATACTRL,
+					 mdctrl,
+					 !(mdctrl & SVC_I3C_MDATACTRL_RXEMPTY),
+					 0, 1000);
+		if (ret)
+			return ret;
+
+		count = SVC_I3C_MDATACTRL_RXCOUNT(mdctrl);
+		for (i = 0; i < count; i++)
+			in[offset + i] = readl(master->regs + SVC_I3C_MRDATAB);
+
+		offset += count;
+	}
+
+	return 0;
+}
+
+static int svc_i3c_master_write(struct svc_i3c_master *master,
+				const u8 *out, unsigned int len)
+{
+	int offset = 0, ret;
+	u32 mdctrl;
+
+	while (offset < len) {
+		ret = readl_poll_timeout(master->regs + SVC_I3C_MDATACTRL,
+					 mdctrl,
+					 !(mdctrl & SVC_I3C_MDATACTRL_TXFULL),
+					 0, 1000);
+		if (ret)
+			return ret;
+
+		/*
+		 * The last byte to be sent over the bus must either have the
+		 * "end" bit set or be written in MWDATABE.
+		 */
+		if (likely(offset < (len - 1)))
+			writel(out[offset++], master->regs + SVC_I3C_MWDATAB);
+		else
+			writel(out[offset++], master->regs + SVC_I3C_MWDATABE);
+	}
+
+	return 0;
+}
+
+static int svc_i3c_master_xfer(struct svc_i3c_master *master,
+			       bool rnw, unsigned int xfer_type, u8 addr,
+			       u8 *in, const u8 *out, unsigned int xfer_len,
+			       unsigned int read_len, bool continued)
+{
+	u32 reg;
+	int ret;
+
+	writel(SVC_I3C_MCTRL_REQUEST_START_ADDR |
+	       xfer_type |
+	       SVC_I3C_MCTRL_IBIRESP_NACK |
+	       SVC_I3C_MCTRL_DIR(rnw) |
+	       SVC_I3C_MCTRL_ADDR(addr) |
+	       SVC_I3C_MCTRL_RDTERM(read_len),
+	       master->regs + SVC_I3C_MCTRL);
+
+	ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
+				 SVC_I3C_MSTATUS_MCTRLDONE(reg), 0, 1000);
+	if (ret)
+		goto emit_stop;
+
+	if (rnw)
+		ret = svc_i3c_master_read(master, in, xfer_len);
+	else
+		ret = svc_i3c_master_write(master, out, xfer_len);
+	if (ret)
+		goto emit_stop;
+
+	ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
+				 SVC_I3C_MSTATUS_COMPLETE(reg), 0, 1000);
+	if (ret)
+		goto emit_stop;
+
+	if (!continued)
+		svc_i3c_master_emit_stop(master);
+
+	return 0;
+
+emit_stop:
+	svc_i3c_master_emit_stop(master);
+	svc_i3c_master_clear_merrwarn(master);
+
+	return ret;
+}
+
+static struct svc_i3c_xfer *
+svc_i3c_master_alloc_xfer(struct svc_i3c_master *master, unsigned int ncmds)
+{
+	struct svc_i3c_xfer *xfer;
+
+	xfer = kzalloc(struct_size(xfer, cmds, ncmds), GFP_KERNEL);
+	if (!xfer)
+		return NULL;
+
+	INIT_LIST_HEAD(&xfer->node);
+	xfer->ncmds = ncmds;
+	xfer->ret = -ETIMEDOUT;
+
+	return xfer;
+}
+
+static void svc_i3c_master_free_xfer(struct svc_i3c_xfer *xfer)
+{
+	kfree(xfer);
+}
+
+static void svc_i3c_master_dequeue_xfer_locked(struct svc_i3c_master *master,
+					       struct svc_i3c_xfer *xfer)
+{
+	if (master->xferqueue.cur == xfer)
+		master->xferqueue.cur = NULL;
+	else
+		list_del_init(&xfer->node);
+}
+
+static void svc_i3c_master_dequeue_xfer(struct svc_i3c_master *master,
+					struct svc_i3c_xfer *xfer)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&master->xferqueue.lock, flags);
+	svc_i3c_master_dequeue_xfer_locked(master, xfer);
+	spin_unlock_irqrestore(&master->xferqueue.lock, flags);
+}
+
+static void svc_i3c_master_start_xfer_locked(struct svc_i3c_master *master)
+{
+	struct svc_i3c_xfer *xfer = master->xferqueue.cur;
+	int ret, i;
+
+	if (!xfer)
+		return;
+
+	for (i = 0; i < xfer->ncmds; i++) {
+		struct svc_i3c_cmd *cmd = &xfer->cmds[i];
+
+		ret = svc_i3c_master_xfer(master, cmd->rnw, xfer->type,
+					  cmd->addr, cmd->in, cmd->out,
+					  cmd->len, cmd->read_len,
+					  cmd->continued);
+		if (ret)
+			break;
+	}
+
+	xfer->ret = ret;
+	complete(&xfer->comp);
+
+	if (ret < 0)
+		svc_i3c_master_dequeue_xfer_locked(master, xfer);
+
+	xfer = list_first_entry_or_null(&master->xferqueue.list,
+					struct svc_i3c_xfer,
+					node);
+	if (xfer)
+		list_del_init(&xfer->node);
+
+	master->xferqueue.cur = xfer;
+	svc_i3c_master_start_xfer_locked(master);
+}
+
+static void svc_i3c_master_enqueue_xfer(struct svc_i3c_master *master,
+					struct svc_i3c_xfer *xfer)
+{
+	unsigned long flags;
+
+	init_completion(&xfer->comp);
+	spin_lock_irqsave(&master->xferqueue.lock, flags);
+	if (master->xferqueue.cur) {
+		list_add_tail(&xfer->node, &master->xferqueue.list);
+	} else {
+		master->xferqueue.cur = xfer;
+		svc_i3c_master_start_xfer_locked(master);
+	}
+	spin_unlock_irqrestore(&master->xferqueue.lock, flags);
+}
+
+static bool
+svc_i3c_master_supports_ccc_cmd(struct i3c_master_controller *master,
+				const struct i3c_ccc_cmd *cmd)
+{
+	/* No software support for CCC commands targeting more than one slave */
+	return (cmd->ndests == 1);
+}
+
+static int svc_i3c_master_send_bdcast_ccc_cmd(struct svc_i3c_master *master,
+					      struct i3c_ccc_cmd *ccc)
+{
+	unsigned int xfer_len = ccc->dests[0].payload.len + 1;
+	struct svc_i3c_xfer *xfer;
+	struct svc_i3c_cmd *cmd;
+	u8 *buf;
+	int ret;
+
+	xfer = svc_i3c_master_alloc_xfer(master, 1);
+	if (!xfer)
+		return -ENOMEM;
+
+	buf = kmalloc(xfer_len, GFP_KERNEL);
+	if (!buf) {
+		svc_i3c_master_free_xfer(xfer);
+		return -ENOMEM;
+	}
+
+	buf[0] = ccc->id;
+	memcpy(&buf[1], ccc->dests[0].payload.data, ccc->dests[0].payload.len);
+
+	xfer->type = SVC_I3C_MCTRL_TYPE_I3C;
+
+	cmd = &xfer->cmds[0];
+	cmd->addr = ccc->dests[0].addr;
+	cmd->rnw = ccc->rnw;
+	cmd->in = NULL;
+	cmd->out = buf;
+	cmd->len = xfer_len;
+	cmd->read_len = 0;
+	cmd->continued = false;
+
+	svc_i3c_master_enqueue_xfer(master, xfer);
+	if (!wait_for_completion_timeout(&xfer->comp, msecs_to_jiffies(1000)))
+		svc_i3c_master_dequeue_xfer(master, xfer);
+
+	ret = xfer->ret;
+	kfree(buf);
+	svc_i3c_master_free_xfer(xfer);
+
+	return ret;
+}
+
+static int svc_i3c_master_send_direct_ccc_cmd(struct svc_i3c_master *master,
+					      struct i3c_ccc_cmd *ccc)
+{
+	unsigned int xfer_len = ccc->dests[0].payload.len;
+	unsigned int read_len = ccc->rnw ? xfer_len : 0;
+	struct svc_i3c_xfer *xfer;
+	struct svc_i3c_cmd *cmd;
+	int ret;
+
+	xfer = svc_i3c_master_alloc_xfer(master, 2);
+	if (!xfer)
+		return -ENOMEM;
+
+	xfer->type = SVC_I3C_MCTRL_TYPE_I3C;
+
+	/* Broadcasted message */
+	cmd = &xfer->cmds[0];
+	cmd->addr = I3C_BROADCAST_ADDR;
+	cmd->rnw = 0;
+	cmd->in = NULL;
+	cmd->out = &ccc->id;
+	cmd->len = 1;
+	cmd->read_len = xfer_len;
+	cmd->read_len = 0;
+	cmd->continued = true;
+
+	/* Directed message */
+	cmd = &xfer->cmds[1];
+	cmd->addr = ccc->dests[0].addr;
+	cmd->rnw = ccc->rnw;
+	cmd->in = ccc->rnw ? ccc->dests[0].payload.data : NULL;
+	cmd->out = ccc->rnw ? NULL : ccc->dests[0].payload.data,
+	cmd->len = xfer_len;
+	cmd->read_len = read_len;
+	cmd->continued = false;
+
+	svc_i3c_master_enqueue_xfer(master, xfer);
+	if (!wait_for_completion_timeout(&xfer->comp, msecs_to_jiffies(1000)))
+		svc_i3c_master_dequeue_xfer(master, xfer);
+
+	ret = xfer->ret;
+	svc_i3c_master_free_xfer(xfer);
+
+	return ret;
+}
+
+static int svc_i3c_master_send_ccc_cmd(struct i3c_master_controller *m,
+				       struct i3c_ccc_cmd *cmd)
+{
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	bool broadcast = cmd->id < 0x80;
+
+	if (broadcast)
+		return svc_i3c_master_send_bdcast_ccc_cmd(master, cmd);
+	else
+		return svc_i3c_master_send_direct_ccc_cmd(master, cmd);
+}
+
+static int svc_i3c_master_priv_xfers(struct i3c_dev_desc *dev,
+				     struct i3c_priv_xfer *xfers,
+				     int nxfers)
+{
+	struct i3c_master_controller *m = i3c_dev_get_master(dev);
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	struct svc_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
+	struct svc_i3c_xfer *xfer;
+	int ret, i;
+
+	xfer = svc_i3c_master_alloc_xfer(master, nxfers);
+	if (!xfer)
+		return -ENOMEM;
+
+	xfer->type = SVC_I3C_MCTRL_TYPE_I3C;
+
+	for (i = 0; i < nxfers; i++) {
+		struct svc_i3c_cmd *cmd = &xfer->cmds[i];
+
+		cmd->addr = master->addrs[data->index];
+		cmd->rnw = xfers[i].rnw;
+		cmd->in = xfers[i].rnw ? xfers[i].data.in : NULL;
+		cmd->out = xfers[i].rnw ? NULL : xfers[i].data.out;
+		cmd->len = xfers[i].len;
+		cmd->read_len = xfers[i].rnw ? xfers[i].len : 0;
+		cmd->continued = (i + 1) < nxfers;
+	}
+
+	svc_i3c_master_enqueue_xfer(master, xfer);
+	if (!wait_for_completion_timeout(&xfer->comp, msecs_to_jiffies(1000)))
+		svc_i3c_master_dequeue_xfer(master, xfer);
+
+	ret = xfer->ret;
+	svc_i3c_master_free_xfer(xfer);
+
+	return ret;
+}
+
+static int svc_i3c_master_i2c_xfers(struct i2c_dev_desc *dev,
+				    const struct i2c_msg *xfers,
+				    int nxfers)
+{
+	struct i3c_master_controller *m = i2c_dev_get_master(dev);
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	struct svc_i3c_i2c_dev_data *data = i2c_dev_get_master_data(dev);
+	struct svc_i3c_xfer *xfer;
+	int ret, i;
+
+	xfer = svc_i3c_master_alloc_xfer(master, nxfers);
+	if (!xfer)
+		return -ENOMEM;
+
+	xfer->type = SVC_I3C_MCTRL_TYPE_I2C;
+
+	for (i = 0; i < nxfers; i++) {
+		struct svc_i3c_cmd *cmd = &xfer->cmds[i];
+
+		cmd->addr = master->addrs[data->index];
+		cmd->rnw = xfers[i].flags & I2C_M_RD;
+		cmd->in = cmd->rnw ? xfers[i].buf : NULL;
+		cmd->out = cmd->rnw ? NULL : xfers[i].buf;
+		cmd->len = xfers[i].len;
+		cmd->read_len = cmd->rnw ? xfers[i].len : 0;
+		cmd->continued = (i + 1 < nxfers);
+	}
+
+	svc_i3c_master_enqueue_xfer(master, xfer);
+	if (!wait_for_completion_timeout(&xfer->comp, msecs_to_jiffies(1000)))
+		svc_i3c_master_dequeue_xfer(master, xfer);
+
+	ret = xfer->ret;
+	svc_i3c_master_free_xfer(xfer);
+
+	return ret;
+}
+
+static int svc_i3c_master_request_ibi(struct i3c_dev_desc *dev,
+				      const struct i3c_ibi_setup *req)
+{
+	struct i3c_master_controller *m = i3c_dev_get_master(dev);
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	struct svc_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
+	unsigned long flags;
+	unsigned int i;
+
+	if (dev->ibi->max_payload_len > SVC_I3C_FIFO_SIZE) {
+		dev_err(master->dev, "IBI max payload %d should be < %d\n",
+			dev->ibi->max_payload_len, SVC_I3C_FIFO_SIZE);
+		return -ERANGE;
+	}
+
+	data->ibi_pool = i3c_generic_ibi_alloc_pool(dev, req);
+	if (IS_ERR(data->ibi_pool))
+		return PTR_ERR(data->ibi_pool);
+
+	spin_lock_irqsave(&master->ibi.lock, flags);
+	for (i = 0; i < master->ibi.num_slots; i++) {
+		if (!master->ibi.slots[i]) {
+			data->ibi = i;
+			master->ibi.slots[i] = dev;
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&master->ibi.lock, flags);
+
+	if (i < master->ibi.num_slots)
+		return 0;
+
+	i3c_generic_ibi_free_pool(data->ibi_pool);
+	data->ibi_pool = NULL;
+
+	return -ENOSPC;
+}
+
+static void svc_i3c_master_free_ibi(struct i3c_dev_desc *dev)
+{
+	struct i3c_master_controller *m = i3c_dev_get_master(dev);
+	struct svc_i3c_master *master = to_svc_i3c_master(m);
+	struct svc_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&master->ibi.lock, flags);
+	master->ibi.slots[data->ibi] = NULL;
+	data->ibi = -1;
+	spin_unlock_irqrestore(&master->ibi.lock, flags);
+
+	i3c_generic_ibi_free_pool(data->ibi_pool);
+}
+
+static int svc_i3c_master_enable_ibi(struct i3c_dev_desc *dev)
+{
+	struct i3c_master_controller *m = i3c_dev_get_master(dev);
+
+	return i3c_master_enec_locked(m, dev->info.dyn_addr, I3C_CCC_EVENT_SIR);
+}
+
+static int svc_i3c_master_disable_ibi(struct i3c_dev_desc *dev)
+{
+	struct i3c_master_controller *m = i3c_dev_get_master(dev);
+
+	return i3c_master_disec_locked(m, dev->info.dyn_addr, I3C_CCC_EVENT_SIR);
+}
+
+static void svc_i3c_master_recycle_ibi_slot(struct i3c_dev_desc *dev,
+					    struct i3c_ibi_slot *slot)
+{
+	struct svc_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
+
+	i3c_generic_ibi_recycle_slot(data->ibi_pool, slot);
+}
+
+static const struct i3c_master_controller_ops svc_i3c_master_ops = {
+	.bus_init = svc_i3c_master_bus_init,
+	.bus_cleanup = svc_i3c_master_bus_cleanup,
+	.attach_i3c_dev = svc_i3c_master_attach_i3c_dev,
+	.detach_i3c_dev = svc_i3c_master_detach_i3c_dev,
+	.reattach_i3c_dev = svc_i3c_master_reattach_i3c_dev,
+	.attach_i2c_dev = svc_i3c_master_attach_i2c_dev,
+	.detach_i2c_dev = svc_i3c_master_detach_i2c_dev,
+	.do_daa = svc_i3c_master_do_daa,
+	.supports_ccc_cmd = svc_i3c_master_supports_ccc_cmd,
+	.send_ccc_cmd = svc_i3c_master_send_ccc_cmd,
+	.priv_xfers = svc_i3c_master_priv_xfers,
+	.i2c_xfers = svc_i3c_master_i2c_xfers,
+	.request_ibi = svc_i3c_master_request_ibi,
+	.free_ibi = svc_i3c_master_free_ibi,
+	.recycle_ibi_slot = svc_i3c_master_recycle_ibi_slot,
+	.enable_ibi = svc_i3c_master_enable_ibi,
+	.disable_ibi = svc_i3c_master_disable_ibi,
+};
+
+static void svc_i3c_master_reset(struct svc_i3c_master *master)
+{
+	u32 reg;
+
+	/* Clear pending warnings */
+	writel(readl(master->regs + SVC_I3C_MERRWARN),
+	       master->regs + SVC_I3C_MERRWARN);
+
+	/* Set RX and TX tigger levels, flush FIFOs */
+	reg = SVC_I3C_MDATACTRL_FLUSHTB |
+	      SVC_I3C_MDATACTRL_FLUSHRB |
+	      SVC_I3C_MDATACTRL_UNLOCK_TRIG |
+	      SVC_I3C_MDATACTRL_TXTRIG_FIFO_NOT_FULL |
+	      SVC_I3C_MDATACTRL_RXTRIG_FIFO_NOT_EMPTY;
+	writel(reg, master->regs + SVC_I3C_MDATACTRL);
+
+	svc_i3c_master_disable_interrupts(master);
+}
+
+static int svc_i3c_master_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct svc_i3c_master *master;
+	int ret;
+
+	master = devm_kzalloc(dev, sizeof(*master), GFP_KERNEL);
+	if (!master)
+		return -ENOMEM;
+
+	master->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(master->regs))
+		return PTR_ERR(master->regs);
+
+	master->pclk = devm_clk_get(dev, "pclk");
+	if (IS_ERR(master->pclk))
+		return PTR_ERR(master->pclk);
+
+	master->fclk = devm_clk_get(dev, "fast_clk");
+	if (IS_ERR(master->fclk))
+		return PTR_ERR(master->fclk);
+
+	master->sclk = devm_clk_get(dev, "slow_clk");
+	if (IS_ERR(master->sclk))
+		return PTR_ERR(master->sclk);
+
+	master->irq = platform_get_irq(pdev, 0);
+	if (master->irq <= 0)
+		return -ENOENT;
+
+	master->dev = dev;
+
+	svc_i3c_master_reset(master);
+
+	ret = clk_prepare_enable(master->pclk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(master->fclk);
+	if (ret)
+		goto err_disable_pclk;
+
+	ret = clk_prepare_enable(master->sclk);
+	if (ret)
+		goto err_disable_fclk;
+
+	INIT_WORK(&master->hj_work, svc_i3c_master_hj_work);
+	INIT_WORK(&master->ibi_work, svc_i3c_master_ibi_work);
+	ret = devm_request_irq(dev, master->irq, svc_i3c_master_irq_handler,
+			       IRQF_NO_SUSPEND, "svc-i3c-irq", master);
+	if (ret)
+		goto err_disable_sclk;
+
+	master->free_slots = GENMASK(SVC_I3C_MAX_DEVS - 1, 0);
+
+	spin_lock_init(&master->xferqueue.lock);
+	INIT_LIST_HEAD(&master->xferqueue.list);
+
+	spin_lock_init(&master->ibi.lock);
+	master->ibi.num_slots = SVC_I3C_MAX_DEVS;
+	master->ibi.slots = devm_kcalloc(&pdev->dev, master->ibi.num_slots,
+					 sizeof(*master->ibi.slots),
+					 GFP_KERNEL);
+	if (!master->ibi.slots) {
+		ret = -ENOMEM;
+		goto err_disable_sclk;
+	}
+
+	platform_set_drvdata(pdev, master);
+
+	/* Register the master */
+	ret = i3c_master_register(&master->base, &pdev->dev,
+				  &svc_i3c_master_ops, false);
+	if (ret)
+		goto err_disable_sclk;
+
+	return 0;
+
+err_disable_sclk:
+	clk_disable_unprepare(master->sclk);
+
+err_disable_fclk:
+	clk_disable_unprepare(master->fclk);
+
+err_disable_pclk:
+	clk_disable_unprepare(master->pclk);
+
+	return ret;
+}
+
+static int svc_i3c_master_remove(struct platform_device *pdev)
+{
+	struct svc_i3c_master *master = platform_get_drvdata(pdev);
+	int ret;
+
+	ret = i3c_master_unregister(&master->base);
+	if (ret)
+		return ret;
+
+	free_irq(master->irq, master);
+	clk_disable_unprepare(master->pclk);
+	clk_disable_unprepare(master->fclk);
+	clk_disable_unprepare(master->sclk);
+
+	return 0;
+}
+
+static const struct of_device_id svc_i3c_master_of_match_tbl[] = {
+	{ .compatible = "silvaco,i3c-master" },
+	{ /* sentinel */ },
+};
+
+static struct platform_driver svc_i3c_master = {
+	.probe = svc_i3c_master_probe,
+	.remove = svc_i3c_master_remove,
+	.driver = {
+		.name = "silvaco-i3c-master",
+		.of_match_table = svc_i3c_master_of_match_tbl,
+	},
+};
+module_platform_driver(svc_i3c_master);
+
+MODULE_AUTHOR("Conor Culhane <conor.culhane@silvaco.com>");
+MODULE_AUTHOR("Miquel Raynal <miquel.raynal@bootlin.com>");
+MODULE_DESCRIPTION("Silvaco dual-role I3C master driver");
+MODULE_LICENSE("GPL v2");
-- 
2.20.1


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^ permalink raw reply	[flat|nested] 7+ messages in thread

* [PATCH v3 4/4] MAINTAINERS: Add Silvaco I3C master
  2020-12-28 16:11 [PATCH v3 0/4] Silvaco I3C master driver Miquel Raynal
                   ` (2 preceding siblings ...)
  2020-12-28 16:11 ` [PATCH v3 3/4] i3c: master: svc: Add Silvaco I3C master driver Miquel Raynal
@ 2020-12-28 16:11 ` Miquel Raynal
  3 siblings, 0 replies; 7+ messages in thread
From: Miquel Raynal @ 2020-12-28 16:11 UTC (permalink / raw)
  To: Alexandre Belloni, linux-i3c
  Cc: devicetree, Rajeev Huralikoppi, Nicolas Pitre, Rob Herring,
	Thomas Petazzoni, Miquel Raynal, Conor Culhane

Add Conor and myself as maintainers.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 MAINTAINERS | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 546aa66428c9..caa4e1ea32a7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -16237,6 +16237,14 @@ S:	Maintained
 F:	Documentation/fb/sm712fb.rst
 F:	drivers/video/fbdev/sm712*
 
+SILVACO I3C DUAL-ROLE MASTER
+M:	Miquel Raynal <miquel.raynal@bootlin.com>
+M:	Conor Culhane <conor.culhane@silvaco.com>
+L:	linux-i3c@lists.infradead.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml
+F:	drivers/i3c/master/svc-i3c-master.c
+
 SIMPLE FIRMWARE INTERFACE (SFI)
 S:	Obsolete
 W:	http://simplefirmware.org/
-- 
2.20.1


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^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v3 2/4] dt-bindings: i3c: Describe Silvaco master binding
  2020-12-28 16:11 ` [PATCH v3 2/4] dt-bindings: i3c: Describe Silvaco master binding Miquel Raynal
@ 2021-01-11 20:08   ` Rob Herring
  2021-01-14 17:55     ` Miquel Raynal
  0 siblings, 1 reply; 7+ messages in thread
From: Rob Herring @ 2021-01-11 20:08 UTC (permalink / raw)
  To: Miquel Raynal
  Cc: devicetree, Alexandre Belloni, Rajeev Huralikoppi, Nicolas Pitre,
	Thomas Petazzoni, linux-i3c, Conor Culhane

On Mon, Dec 28, 2020 at 05:11:05PM +0100, Miquel Raynal wrote:
> Silvaco provide a dual-role I3C master.
> 
> Description is rather simple: it needs a register mapping, three
> clocks and an interrupt.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> ---
>  .../bindings/i3c/silvaco,i3c-master.yaml      | 63 +++++++++++++++++++
>  1 file changed, 63 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml
> 
> diff --git a/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml b/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml
> new file mode 100644
> index 000000000000..509de48455b0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml
> @@ -0,0 +1,63 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/i3c/silvaco,i3c-master.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Silvaco I3C master
> +
> +maintainers:
> +  - Conor Culhane <conor.culhane@silvaco.com>
> +
> +properties:
> +  compatible:
> +    const: silvaco,i3c-master

Kind of generic. Only 1 version?

> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: pclk, the system clock
> +      - description: fast_clk, for the bus
> +      - description: slow_clk, for other events

The names of the clocks go...

> +
> +  clock-names:
> +    minItems: 3
> +    maxItems: 3

here.

> +
> +  resets:
> +    maxItems: 1
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0

This 2 should be defined by a bus binding. Care to convert i3c.txt?

> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clock-names
> +  - clocks
> +  - "#address-cells"
> +  - "#size-cells"
> +
> +additionalProperties: false

No, don't you need child nodes?

> +
> +examples:
> +  - |
> +    i3c-master@a0000000 {
> +        compatible = "silvaco,i3c-master";
> +        clocks = <&zynqmp_clk 71>, <&fclk>, <&sclk>;
> +        clock-names = "pclk", "fast_clk", "slow_clk";
> +        interrupt-parent = <&gic>;
> +        interrupts = <0 89 4>;
> +        reg = <0xa0000000 0x1000>;
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +    };
> -- 
> 2.20.1
> 

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^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v3 2/4] dt-bindings: i3c: Describe Silvaco master binding
  2021-01-11 20:08   ` Rob Herring
@ 2021-01-14 17:55     ` Miquel Raynal
  0 siblings, 0 replies; 7+ messages in thread
From: Miquel Raynal @ 2021-01-14 17:55 UTC (permalink / raw)
  To: Rob Herring
  Cc: devicetree, Alexandre Belloni, Rajeev Huralikoppi, Nicolas Pitre,
	Thomas Petazzoni, linux-i3c, Conor Culhane

Hi Rob,

> > +properties:
> > +  compatible:
> > +    const: silvaco,i3c-master  
> 
> Kind of generic. Only 1 version?

I appended a -v1 because I have no clue of the numbering neither if
more versions will actually come.

[...]

> > +
> > +  clocks:
> > +    items:
> > +      - description: pclk, the system clock
> > +      - description: fast_clk, for the bus
> > +      - description: slow_clk, for other events  
> 
> The names of the clocks go...

Issues corrected.

[...]

> > +
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0  
> 
> This 2 should be defined by a bus binding. Care to convert i3c.txt?

Please see v4 of this series, which includes a converstion attempt to
i3c.yaml. I am far from comfortable with yaml schema but, let's see
what you think.

Thanks,
Miquèl

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^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2021-01-14 17:56 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-12-28 16:11 [PATCH v3 0/4] Silvaco I3C master driver Miquel Raynal
2020-12-28 16:11 ` [PATCH v3 1/4] dt-bindings: Add vendor prefix for Silvaco Miquel Raynal
2020-12-28 16:11 ` [PATCH v3 2/4] dt-bindings: i3c: Describe Silvaco master binding Miquel Raynal
2021-01-11 20:08   ` Rob Herring
2021-01-14 17:55     ` Miquel Raynal
2020-12-28 16:11 ` [PATCH v3 3/4] i3c: master: svc: Add Silvaco I3C master driver Miquel Raynal
2020-12-28 16:11 ` [PATCH v3 4/4] MAINTAINERS: Add Silvaco I3C master Miquel Raynal

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