Merge branches 'clk-baikal', 'clk-broadcom', 'clk-vc5' and 'clk-versaclock' into clk-next

 - Convert Baikal-T1 CCU driver to platform driver
 - Split reset support out of primary Baikal-T1 CCU driver
 - Add some missing clks required for RPiVid Video Decoder on RaspberryPi
 - Mark PLLC critical on bcm2835
 - Support for Renesas VersaClock7 clock generator family

* clk-baikal:
  clk: baikal-t1: Convert to platform device driver
  clk: baikal-t1: Add DDR/PCIe directly controlled resets support
  dt-bindings: clk: baikal-t1: Add DDR/PCIe reset IDs
  clk: baikal-t1: Move reset-controls code into a dedicated module
  clk: baikal-t1: Add SATA internal ref clock buffer
  clk: baikal-t1: Add shared xGMAC ref/ptp clocks internal parent
  clk: baikal-t1: Fix invalid xGMAC PTP clock divider
  clk: vc5: Fix 5P49V6901 outputs disabling when enabling FOD

* clk-broadcom:
  clk: bcm: rpi: Add support for VEC clock
  clk: bcm: rpi: Handle pixel clock in firmware
  clk: bcm: rpi: Add support HEVC clock
  clk: bcm2835: fix bcm2835_clock_rate_from_divisor declaration
  clk: bcm2835: Round UART input clock up
  clk: bcm2835: Make peripheral PLLC critical

* clk-vc5:
  clk: vc5: Add support for IDT/Renesas VersaClock 5P49V6975
  dt-bindings: clock: vc5: Add 5P49V6975
  clk: vc5: Use regmap_{set,clear}_bits() where appropriate
  clk: vc5: Check IO access results

* clk-versaclock:
  clk: Renesas versaclock7 ccf device driver
  dt-bindings: Renesas versaclock7 device tree bindings

Documentation/devicetree/bindings/clock/idt,versaclock5.yaml

@@ -56,6 +56,7 @@ properties:
       - idt,5p49v5935
       - idt,5p49v6901
       - idt,5p49v6965
+      - idt,5p49v6975
 
   reg:
     description: I2C device address
@@ -134,6 +135,7 @@ allOf:
           enum:
             - idt,5p49v5933
             - idt,5p49v5935
+            - idt,5p49v6975
     then:
       # Devices with builtin crystal + optional external input
       properties:

Documentation/devicetree/bindings/clock/renesas,versaclock7.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/renesas,versaclock7.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas Versaclock7 Programmable Clock Device Tree Bindings
+
+maintainers:
+  - Alex Helms <alexander.helms.jy@renesas.com>
+
+description: |
+  Renesas Versaclock7 is a family of configurable clock generator and
+  jitter attenuator ICs with fractional and integer dividers.
+
+properties:
+  '#clock-cells':
+    const: 1
+
+  compatible:
+    enum:
+      - renesas,rc21008a
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: External crystal or oscillator
+
+  clock-names:
+    items:
+      - const: xin
+
+required:
+  - '#clock-cells'
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    vc7_xin: clock {
+        compatible = "fixed-clock";
+        #clock-cells = <0>;
+        clock-frequency = <49152000>;
+    };
+
+    i2c@0 {
+        reg = <0x0 0x100>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        vc7: clock-controller@9 {
+            compatible = "renesas,rc21008a";
+            reg = <0x9>;
+            #clock-cells = <1>;
+            clocks = <&vc7_xin>;
+            clock-names = "xin";
+        };
+    };

MAINTAINERS

@@ -17442,6 +17442,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/mtd/renesas-nandc.yaml
 F:	drivers/mtd/nand/raw/renesas-nand-controller.c
 
+RENESAS VERSACLOCK 7 CLOCK DRIVER
+M:	Alex Helms <alexander.helms.jy@renesas.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/clock/renesas,versaclock7.yaml
+F:	drivers/clk/clk-versaclock7.c
+
 RESET CONTROLLER FRAMEWORK
 M:	Philipp Zabel <p.zabel@pengutronix.de>
 S:	Maintained

drivers/clk/Kconfig

@@ -377,6 +377,15 @@ config COMMON_CLK_VC5
 	  This driver supports the IDT VersaClock 5 and VersaClock 6
 	  programmable clock generators.
 
+config COMMON_CLK_VC7
+	tristate "Clock driver for Renesas Versaclock 7 devices"
+	depends on I2C
+	depends on OF
+	select REGMAP_I2C
+	help
+	  Renesas Versaclock7 is a family of configurable clock generator
+	  and jitter attenuator ICs with fractional and integer dividers.
+
 config COMMON_CLK_STM32MP135
 	def_bool COMMON_CLK && MACH_STM32MP13
 	help

drivers/clk/Makefile

@@ -73,6 +73,7 @@ obj-$(CONFIG_CLK_TWL6040)		+= clk-twl6040.o
 obj-$(CONFIG_ARCH_VT8500)		+= clk-vt8500.o
 obj-$(CONFIG_COMMON_CLK_RS9_PCIE)	+= clk-renesas-pcie.o
 obj-$(CONFIG_COMMON_CLK_VC5)		+= clk-versaclock5.o
+obj-$(CONFIG_COMMON_CLK_VC7)		+= clk-versaclock7.o
 obj-$(CONFIG_COMMON_CLK_WM831X)		+= clk-wm831x.o
 obj-$(CONFIG_COMMON_CLK_XGENE)		+= clk-xgene.o
 

drivers/clk/baikal-t1/Kconfig

@@ -29,7 +29,6 @@ config CLK_BT1_CCU_PLL
 
 config CLK_BT1_CCU_DIV
 	bool "Baikal-T1 CCU Dividers support"
-	select RESET_CONTROLLER
 	select MFD_SYSCON
 	default MIPS_BAIKAL_T1
 	help
@@ -39,4 +38,15 @@ config CLK_BT1_CCU_DIV
 	  either gateable or ungateable. Some of the CCU dividers can be as well
 	  used to reset the domains they're supplying clock to.
 
+config CLK_BT1_CCU_RST
+	bool "Baikal-T1 CCU Resets support"
+	select RESET_CONTROLLER
+	select MFD_SYSCON
+	default MIPS_BAIKAL_T1
+	help
+	  Enable this to support the CCU reset blocks responsible for the
+	  AXI-bus and some subsystems reset. These are mainly the
+	  self-deasserted reset controls but there are several lines which
+	  can be directly asserted/de-asserted (PCIe and DDR sub-domains).
+
 endif

drivers/clk/baikal-t1/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_CLK_BT1_CCU_PLL) += ccu-pll.o clk-ccu-pll.o
 obj-$(CONFIG_CLK_BT1_CCU_DIV) += ccu-div.o clk-ccu-div.o
+obj-$(CONFIG_CLK_BT1_CCU_RST) += ccu-rst.o

drivers/clk/baikal-t1/ccu-div.c

@@ -34,9 +34,9 @@
 #define CCU_DIV_CTL_CLKDIV_MASK(_width) \
 	GENMASK((_width) + CCU_DIV_CTL_CLKDIV_FLD - 1, CCU_DIV_CTL_CLKDIV_FLD)
 #define CCU_DIV_CTL_LOCK_SHIFTED	BIT(27)
+#define CCU_DIV_CTL_GATE_REF_BUF	BIT(28)
 #define CCU_DIV_CTL_LOCK_NORMAL		BIT(31)
 
-#define CCU_DIV_RST_DELAY_US		1
 #define CCU_DIV_LOCK_CHECK_RETRIES	50
 
 #define CCU_DIV_CLKDIV_MIN		0
@@ -170,6 +170,40 @@ static int ccu_div_gate_is_enabled(struct clk_hw *hw)
 	return !!(val & CCU_DIV_CTL_EN);
 }
 
+static int ccu_div_buf_enable(struct clk_hw *hw)
+{
+	struct ccu_div *div = to_ccu_div(hw);
+	unsigned long flags;
+
+	spin_lock_irqsave(&div->lock, flags);
+	regmap_update_bits(div->sys_regs, div->reg_ctl,
+			   CCU_DIV_CTL_GATE_REF_BUF, 0);
+	spin_unlock_irqrestore(&div->lock, flags);
+
+	return 0;
+}
+
+static void ccu_div_buf_disable(struct clk_hw *hw)
+{
+	struct ccu_div *div = to_ccu_div(hw);
+	unsigned long flags;
+
+	spin_lock_irqsave(&div->lock, flags);
+	regmap_update_bits(div->sys_regs, div->reg_ctl,
+			   CCU_DIV_CTL_GATE_REF_BUF, CCU_DIV_CTL_GATE_REF_BUF);
+	spin_unlock_irqrestore(&div->lock, flags);
+}
+
+static int ccu_div_buf_is_enabled(struct clk_hw *hw)
+{
+	struct ccu_div *div = to_ccu_div(hw);
+	u32 val = 0;
+
+	regmap_read(div->sys_regs, div->reg_ctl, &val);
+
+	return !(val & CCU_DIV_CTL_GATE_REF_BUF);
+}
+
 static unsigned long ccu_div_var_recalc_rate(struct clk_hw *hw,
 					     unsigned long parent_rate)
 {
@@ -288,24 +322,6 @@ static int ccu_div_fixed_set_rate(struct clk_hw *hw, unsigned long rate,
 	return 0;
 }
 
-int ccu_div_reset_domain(struct ccu_div *div)
-{
-	unsigned long flags;
-
-	if (!div || !(div->features & CCU_DIV_RESET_DOMAIN))
-		return -EINVAL;
-
-	spin_lock_irqsave(&div->lock, flags);
-	regmap_update_bits(div->sys_regs, div->reg_ctl,
-			   CCU_DIV_CTL_RST, CCU_DIV_CTL_RST);
-	spin_unlock_irqrestore(&div->lock, flags);
-
-	/* The next delay must be enough to cover all the resets. */
-	udelay(CCU_DIV_RST_DELAY_US);
-
-	return 0;
-}
-
 #ifdef CONFIG_DEBUG_FS
 
 struct ccu_div_dbgfs_bit {
@@ -323,6 +339,7 @@ static const struct ccu_div_dbgfs_bit ccu_div_bits[] = {
 	CCU_DIV_DBGFS_BIT_ATTR("div_en", CCU_DIV_CTL_EN),
 	CCU_DIV_DBGFS_BIT_ATTR("div_rst", CCU_DIV_CTL_RST),
 	CCU_DIV_DBGFS_BIT_ATTR("div_bypass", CCU_DIV_CTL_SET_CLKDIV),
+	CCU_DIV_DBGFS_BIT_ATTR("div_buf", CCU_DIV_CTL_GATE_REF_BUF),
 	CCU_DIV_DBGFS_BIT_ATTR("div_lock", CCU_DIV_CTL_LOCK_NORMAL)
 };
 
@@ -441,6 +458,9 @@ static void ccu_div_var_debug_init(struct clk_hw *hw, struct dentry *dentry)
 			continue;
 		}
 
+		if (!strcmp("div_buf", name))
+			continue;
+
 		bits[didx] = ccu_div_bits[bidx];
 		bits[didx].div = div;
 
@@ -477,6 +497,21 @@ static void ccu_div_gate_debug_init(struct clk_hw *hw, struct dentry *dentry)
 				   &ccu_div_dbgfs_fixed_clkdiv_fops);
 }
 
+static void ccu_div_buf_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+	struct ccu_div *div = to_ccu_div(hw);
+	struct ccu_div_dbgfs_bit *bit;
+
+	bit = kmalloc(sizeof(*bit), GFP_KERNEL);
+	if (!bit)
+		return;
+
+	*bit = ccu_div_bits[3];
+	bit->div = div;
+	debugfs_create_file_unsafe(bit->name, ccu_div_dbgfs_mode, dentry, bit,
+				   &ccu_div_dbgfs_bit_fops);
+}
+
 static void ccu_div_fixed_debug_init(struct clk_hw *hw, struct dentry *dentry)
 {
 	struct ccu_div *div = to_ccu_div(hw);
@@ -489,6 +524,7 @@ static void ccu_div_fixed_debug_init(struct clk_hw *hw, struct dentry *dentry)
 
 #define ccu_div_var_debug_init NULL
 #define ccu_div_gate_debug_init NULL
+#define ccu_div_buf_debug_init NULL
 #define ccu_div_fixed_debug_init NULL
 
 #endif /* !CONFIG_DEBUG_FS */
@@ -520,6 +556,13 @@ static const struct clk_ops ccu_div_gate_ops = {
 	.debug_init = ccu_div_gate_debug_init
 };
 
+static const struct clk_ops ccu_div_buf_ops = {
+	.enable = ccu_div_buf_enable,
+	.disable = ccu_div_buf_disable,
+	.is_enabled = ccu_div_buf_is_enabled,
+	.debug_init = ccu_div_buf_debug_init
+};
+
 static const struct clk_ops ccu_div_fixed_ops = {
 	.recalc_rate = ccu_div_fixed_recalc_rate,
 	.round_rate = ccu_div_fixed_round_rate,
@@ -566,6 +609,8 @@ struct ccu_div *ccu_div_hw_register(const struct ccu_div_init_data *div_init)
 	} else if (div_init->type == CCU_DIV_GATE) {
 		hw_init.ops = &ccu_div_gate_ops;
 		div->divider = div_init->divider;
+	} else if (div_init->type == CCU_DIV_BUF) {
+		hw_init.ops = &ccu_div_buf_ops;
 	} else if (div_init->type == CCU_DIV_FIXED) {
 		hw_init.ops = &ccu_div_fixed_ops;
 		div->divider = div_init->divider;
@@ -579,6 +624,7 @@ struct ccu_div *ccu_div_hw_register(const struct ccu_div_init_data *div_init)
 		goto err_free_div;
 	}
 	parent_data.fw_name = div_init->parent_name;
+	parent_data.name = div_init->parent_name;
 	hw_init.parent_data = &parent_data;
 	hw_init.num_parents = 1;
 

drivers/clk/baikal-t1/ccu-div.h

@@ -13,15 +13,26 @@
 #include <linux/bits.h>
 #include <linux/of.h>
 
+/*
+ * CCU Divider private clock IDs
+ * @CCU_SYS_SATA_CLK: CCU SATA internal clock
+ * @CCU_SYS_XGMAC_CLK: CCU XGMAC internal clock
+ */
+#define CCU_SYS_SATA_CLK		-1
+#define CCU_SYS_XGMAC_CLK		-2
+
 /*
  * CCU Divider private flags
+ * @CCU_DIV_BASIC: Basic divider clock required by the kernel as early as
+ *		   possible.
  * @CCU_DIV_SKIP_ONE: Due to some reason divider can't be set to 1.
  *		      It can be 0 though, which is functionally the same.
  * @CCU_DIV_SKIP_ONE_TO_THREE: For some reason divider can't be within [1,3].
  *			       It can be either 0 or greater than 3.
  * @CCU_DIV_LOCK_SHIFTED: Find lock-bit at non-standard position.
- * @CCU_DIV_RESET_DOMAIN: Provide reset clock domain method.
+ * @CCU_DIV_RESET_DOMAIN: There is a clock domain reset handle.
  */
+#define CCU_DIV_BASIC			BIT(0)
 #define CCU_DIV_SKIP_ONE		BIT(1)
 #define CCU_DIV_SKIP_ONE_TO_THREE	BIT(2)
 #define CCU_DIV_LOCK_SHIFTED		BIT(3)
@@ -31,11 +42,13 @@
  * enum ccu_div_type - CCU Divider types
  * @CCU_DIV_VAR: Clocks gate with variable divider.
  * @CCU_DIV_GATE: Clocks gate with fixed divider.
+ * @CCU_DIV_BUF: Clock gate with no divider.
  * @CCU_DIV_FIXED: Ungateable clock with fixed divider.
  */
 enum ccu_div_type {
 	CCU_DIV_VAR,
 	CCU_DIV_GATE,
+	CCU_DIV_BUF,
 	CCU_DIV_FIXED
 };
 
@@ -105,6 +118,4 @@ struct ccu_div *ccu_div_hw_register(const struct ccu_div_init_data *init);
 
 void ccu_div_hw_unregister(struct ccu_div *div);
 
-int ccu_div_reset_domain(struct ccu_div *div);
-
 #endif /* __CLK_BT1_CCU_DIV_H__ */

drivers/clk/baikal-t1/ccu-pll.h

@@ -13,6 +13,12 @@
 #include <linux/bits.h>
 #include <linux/of.h>
 
+/*
+ * CCU PLL private flags
+ * @CCU_PLL_BASIC: Basic PLL required by the kernel as early as possible.
+ */
+#define CCU_PLL_BASIC		BIT(0)
+
 /*
  * struct ccu_pll_init_data - CCU PLL initialization data
  * @id: Clock private identifier.
@@ -22,6 +28,7 @@
  * @sys_regs: Baikal-T1 System Controller registers map.
  * @np: Pointer to the node describing the CCU PLLs.
  * @flags: PLL clock flags.
+ * @features: PLL private features.
  */
 struct ccu_pll_init_data {
 	unsigned int id;
@@ -31,6 +38,7 @@ struct ccu_pll_init_data {
 	struct regmap *sys_regs;
 	struct device_node *np;
 	unsigned long flags;
+	unsigned long features;
 };
 
 /*

drivers/clk/baikal-t1/ccu-rst.c

+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021 BAIKAL ELECTRONICS, JSC
+ *
+ * Authors:
+ *   Serge Semin <Sergey.Semin@baikalelectronics.ru>
+ *
+ * Baikal-T1 CCU Resets interface driver
+ */
+
+#define pr_fmt(fmt) "bt1-ccu-rst: " fmt
+
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/printk.h>
+#include <linux/regmap.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/reset/bt1-ccu.h>
+
+#include "ccu-rst.h"
+
+#define CCU_AXI_MAIN_BASE		0x030
+#define CCU_AXI_DDR_BASE		0x034
+#define CCU_AXI_SATA_BASE		0x038
+#define CCU_AXI_GMAC0_BASE		0x03C
+#define CCU_AXI_GMAC1_BASE		0x040
+#define CCU_AXI_XGMAC_BASE		0x044
+#define CCU_AXI_PCIE_M_BASE		0x048
+#define CCU_AXI_PCIE_S_BASE		0x04C
+#define CCU_AXI_USB_BASE		0x050
+#define CCU_AXI_HWA_BASE		0x054
+#define CCU_AXI_SRAM_BASE		0x058
+
+#define CCU_SYS_DDR_BASE		0x02c
+#define CCU_SYS_SATA_REF_BASE		0x060
+#define CCU_SYS_APB_BASE		0x064
+#define CCU_SYS_PCIE_BASE		0x144
+
+#define CCU_RST_DELAY_US		1
+
+#define CCU_RST_TRIG(_base, _ofs)		\
+	{					\
+		.type = CCU_RST_TRIG,		\
+		.base = _base,			\
+		.mask = BIT(_ofs),		\
+	}
+
+#define CCU_RST_DIR(_base, _ofs)		\
+	{					\
+		.type = CCU_RST_DIR,		\
+		.base = _base,			\
+		.mask = BIT(_ofs),		\
+	}
+
+struct ccu_rst_info {
+	enum ccu_rst_type type;
+	unsigned int base;
+	unsigned int mask;
+};
+
+/*
+ * Each AXI-bus clock divider is equipped with the corresponding clock-consumer
+ * domain reset (it's self-deasserted reset control).
+ */
+static const struct ccu_rst_info axi_rst_info[] = {
+	[CCU_AXI_MAIN_RST] = CCU_RST_TRIG(CCU_AXI_MAIN_BASE, 1),
+	[CCU_AXI_DDR_RST] = CCU_RST_TRIG(CCU_AXI_DDR_BASE, 1),
+	[CCU_AXI_SATA_RST] = CCU_RST_TRIG(CCU_AXI_SATA_BASE, 1),
+	[CCU_AXI_GMAC0_RST] = CCU_RST_TRIG(CCU_AXI_GMAC0_BASE, 1),
+	[CCU_AXI_GMAC1_RST] = CCU_RST_TRIG(CCU_AXI_GMAC1_BASE, 1),
+	[CCU_AXI_XGMAC_RST] = CCU_RST_TRIG(CCU_AXI_XGMAC_BASE, 1),
+	[CCU_AXI_PCIE_M_RST] = CCU_RST_TRIG(CCU_AXI_PCIE_M_BASE, 1),
+	[CCU_AXI_PCIE_S_RST] = CCU_RST_TRIG(CCU_AXI_PCIE_S_BASE, 1),
+	[CCU_AXI_USB_RST] = CCU_RST_TRIG(CCU_AXI_USB_BASE, 1),
+	[CCU_AXI_HWA_RST] = CCU_RST_TRIG(CCU_AXI_HWA_BASE, 1),
+	[CCU_AXI_SRAM_RST] = CCU_RST_TRIG(CCU_AXI_SRAM_BASE, 1),
+};
+
+/*
+ * SATA reference clock domain and APB-bus domain are connected with the
+ * sefl-deasserted reset control, which can be activated via the corresponding
+ * clock divider register. DDR and PCIe sub-domains can be reset with directly
+ * controlled reset signals. Resetting the DDR controller though won't end up
+ * well while the Linux kernel is working.
+ */
+static const struct ccu_rst_info sys_rst_info[] = {
+	[CCU_SYS_SATA_REF_RST] = CCU_RST_TRIG(CCU_SYS_SATA_REF_BASE, 1),
+	[CCU_SYS_APB_RST] = CCU_RST_TRIG(CCU_SYS_APB_BASE, 1),
+	[CCU_SYS_DDR_FULL_RST] = CCU_RST_DIR(CCU_SYS_DDR_BASE, 1),
+	[CCU_SYS_DDR_INIT_RST] = CCU_RST_DIR(CCU_SYS_DDR_BASE, 2),
+	[CCU_SYS_PCIE_PCS_PHY_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 0),
+	[CCU_SYS_PCIE_PIPE0_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 4),
+	[CCU_SYS_PCIE_CORE_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 8),
+	[CCU_SYS_PCIE_PWR_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 9),
+	[CCU_SYS_PCIE_STICKY_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 10),
+	[CCU_SYS_PCIE_NSTICKY_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 11),
+	[CCU_SYS_PCIE_HOT_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 12),
+};
+
+static int ccu_rst_reset(struct reset_controller_dev *rcdev, unsigned long idx)
+{
+	struct ccu_rst *rst = to_ccu_rst(rcdev);
+	const struct ccu_rst_info *info = &rst->rsts_info[idx];
+
+	if (info->type != CCU_RST_TRIG)
+		return -EOPNOTSUPP;
+
+	regmap_update_bits(rst->sys_regs, info->base, info->mask, info->mask);
+
+	/* The next delay must be enough to cover all the resets. */
+	udelay(CCU_RST_DELAY_US);
+
+	return 0;
+}
+
+static int ccu_rst_set(struct reset_controller_dev *rcdev,
+		       unsigned long idx, bool high)
+{
+	struct ccu_rst *rst = to_ccu_rst(rcdev);
+	const struct ccu_rst_info *info = &rst->rsts_info[idx];
+
+	if (info->type != CCU_RST_DIR)
+		return high ? -EOPNOTSUPP : 0;
+
+	return regmap_update_bits(rst->sys_regs, info->base,
+				  info->mask, high ? info->mask : 0);
+}
+
+static int ccu_rst_assert(struct reset_controller_dev *rcdev,
+			  unsigned long idx)
+{
+	return ccu_rst_set(rcdev, idx, true);
+}
+
+static int ccu_rst_deassert(struct reset_controller_dev *rcdev,
+			    unsigned long idx)
+{
+	return ccu_rst_set(rcdev, idx, false);
+}
+
+static int ccu_rst_status(struct reset_controller_dev *rcdev,
+			  unsigned long idx)
+{
+	struct ccu_rst *rst = to_ccu_rst(rcdev);
+	const struct ccu_rst_info *info = &rst->rsts_info[idx];
+	u32 val;
+
+	if (info->type != CCU_RST_DIR)
+		return -EOPNOTSUPP;
+
+	regmap_read(rst->sys_regs, info->base, &val);
+
+	return !!(val & info->mask);
+}
+
+static const struct reset_control_ops ccu_rst_ops = {
+	.reset = ccu_rst_reset,
+	.assert = ccu_rst_assert,
+	.deassert = ccu_rst_deassert,
+	.status = ccu_rst_status,
+};
+
+struct ccu_rst *ccu_rst_hw_register(const struct ccu_rst_init_data *rst_init)
+{
+	struct ccu_rst *rst;
+	int ret;
+
+	if (!rst_init)
+		return ERR_PTR(-EINVAL);
+
+	rst = kzalloc(sizeof(*rst), GFP_KERNEL);
+	if (!rst)
+		return ERR_PTR(-ENOMEM);
+
+	rst->sys_regs = rst_init->sys_regs;
+	if (of_device_is_compatible(rst_init->np, "baikal,bt1-ccu-axi")) {
+		rst->rcdev.nr_resets = ARRAY_SIZE(axi_rst_info);
+		rst->rsts_info = axi_rst_info;
+	} else if (of_device_is_compatible(rst_init->np, "baikal,bt1-ccu-sys")) {
+		rst->rcdev.nr_resets = ARRAY_SIZE(sys_rst_info);
+		rst->rsts_info = sys_rst_info;
+	} else {
+		pr_err("Incompatible DT node '%s' specified\n",
+		       of_node_full_name(rst_init->np));
+		ret = -EINVAL;
+		goto err_kfree_rst;
+	}
+
+	rst->rcdev.owner = THIS_MODULE;
+	rst->rcdev.ops = &ccu_rst_ops;
+	rst->rcdev.of_node = rst_init->np;
+
+	ret = reset_controller_register(&rst->rcdev);
+	if (ret) {
+		pr_err("Couldn't register '%s' reset controller\n",
+		       of_node_full_name(rst_init->np));
+		goto err_kfree_rst;
+	}
+
+	return rst;
+
+err_kfree_rst:
+	kfree(rst);
+
+	return ERR_PTR(ret);
+}
+
+void ccu_rst_hw_unregister(struct ccu_rst *rst)
+{
+	reset_controller_unregister(&rst->rcdev);
+
+	kfree(rst);
+}

drivers/clk/baikal-t1/ccu-rst.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021 BAIKAL ELECTRONICS, JSC
+ *
+ * Baikal-T1 CCU Resets interface driver
+ */
+#ifndef __CLK_BT1_CCU_RST_H__
+#define __CLK_BT1_CCU_RST_H__
+
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/reset-controller.h>
+
+struct ccu_rst_info;
+
+/*
+ * enum ccu_rst_type - CCU Reset types
+ * @CCU_RST_TRIG: Self-deasserted reset signal.
+ * @CCU_RST_DIR: Directly controlled reset signal.
+ */
+enum ccu_rst_type {
+	CCU_RST_TRIG,
+	CCU_RST_DIR,
+};
+
+/*
+ * struct ccu_rst_init_data - CCU Resets initialization data
+ * @sys_regs: Baikal-T1 System Controller registers map.
+ * @np: Pointer to the node with the System CCU block.
+ */
+struct ccu_rst_init_data {
+	struct regmap *sys_regs;
+	struct device_node *np;
+};
+
+/*
+ * struct ccu_rst - CCU Reset descriptor
+ * @rcdev: Reset controller descriptor.
+ * @sys_regs: Baikal-T1 System Controller registers map.
+ * @rsts_info: Reset flag info (base address and mask).
+ */
+struct ccu_rst {
+	struct reset_controller_dev rcdev;
+	struct regmap *sys_regs;
+	const struct ccu_rst_info *rsts_info;
+};
+#define to_ccu_rst(_rcdev) container_of(_rcdev, struct ccu_rst, rcdev)
+
+#ifdef CONFIG_CLK_BT1_CCU_RST
+
+struct ccu_rst *ccu_rst_hw_register(const struct ccu_rst_init_data *init);
+
+void ccu_rst_hw_unregister(struct ccu_rst *rst);
+
+#else
+
+static inline
+struct ccu_rst *ccu_rst_hw_register(const struct ccu_rst_init_data *init)
+{
+	return NULL;
+}
+
+static inline void ccu_rst_hw_unregister(struct ccu_rst *rst) {}
+
+#endif
+
+#endif /* __CLK_BT1_CCU_RST_H__ */

drivers/clk/baikal-t1/clk-ccu-pll.c

@@ -12,6 +12,7 @@
 #define pr_fmt(fmt) "bt1-ccu-pll: " fmt
 
 #include <linux/kernel.h>
+#include <linux/platform_device.h>
 #include <linux/printk.h>
 #include <linux/slab.h>
 #include <linux/clk-provider.h>
@@ -31,13 +32,14 @@
 #define CCU_PCIE_PLL_BASE		0x018
 #define CCU_ETH_PLL_BASE		0x020
 
-#define CCU_PLL_INFO(_id, _name, _pname, _base, _flags)	\
+#define CCU_PLL_INFO(_id, _name, _pname, _base, _flags, _features)	\
 	{								\
 		.id = _id,						\
 		.name = _name,						\
 		.parent_name = _pname,					\
 		.base = _base,						\
-		.flags = _flags				\
+		.flags = _flags,					\
+		.features = _features,					\
 	}
 
 #define CCU_PLL_NUM			ARRAY_SIZE(pll_info)
@@ -48,6 +50,7 @@ struct ccu_pll_info {
 	const char *parent_name;
 	unsigned int base;
 	unsigned long flags;
+	unsigned long features;
 };
 
 /*
@@ -61,15 +64,15 @@ struct ccu_pll_info {
  */
 static const struct ccu_pll_info pll_info[] = {
 	CCU_PLL_INFO(CCU_CPU_PLL, "cpu_pll", "ref_clk", CCU_CPU_PLL_BASE,
-		     CLK_IS_CRITICAL),
+		     CLK_IS_CRITICAL, CCU_PLL_BASIC),
 	CCU_PLL_INFO(CCU_SATA_PLL, "sata_pll", "ref_clk", CCU_SATA_PLL_BASE,
-		     CLK_IS_CRITICAL | CLK_SET_RATE_GATE),
+		     CLK_IS_CRITICAL | CLK_SET_RATE_GATE, 0),
 	CCU_PLL_INFO(CCU_DDR_PLL, "ddr_pll", "ref_clk", CCU_DDR_PLL_BASE,
-		     CLK_IS_CRITICAL | CLK_SET_RATE_GATE),
+		     CLK_IS_CRITICAL | CLK_SET_RATE_GATE, 0),
 	CCU_PLL_INFO(CCU_PCIE_PLL, "pcie_pll", "ref_clk", CCU_PCIE_PLL_BASE,
-		     CLK_IS_CRITICAL),
+		     CLK_IS_CRITICAL, CCU_PLL_BASIC),
 	CCU_PLL_INFO(CCU_ETH_PLL, "eth_pll", "ref_clk", CCU_ETH_PLL_BASE,
-		     CLK_IS_CRITICAL | CLK_SET_RATE_GATE)
+		     CLK_IS_CRITICAL | CLK_SET_RATE_GATE, 0)
 };
 
 struct ccu_pll_data {
@@ -78,16 +81,16 @@ struct ccu_pll_data {
 	struct ccu_pll *plls[CCU_PLL_NUM];
 };
 
+static struct ccu_pll_data *pll_data;
+
 static struct ccu_pll *ccu_pll_find_desc(struct ccu_pll_data *data,
 					 unsigned int clk_id)
 {
-	struct ccu_pll *pll;
 	int idx;
 
 	for (idx = 0; idx < CCU_PLL_NUM; ++idx) {
-		pll = data->plls[idx];
-		if (pll && pll->id == clk_id)
-			return pll;
+		if (pll_info[idx].id == clk_id)
+			return data->plls[idx];
 	}
 
 	return ERR_PTR(-EINVAL);
@@ -133,14 +136,16 @@ static struct clk_hw *ccu_pll_of_clk_hw_get(struct of_phandle_args *clkspec,
 	clk_id = clkspec->args[0];
 	pll = ccu_pll_find_desc(data, clk_id);
 	if (IS_ERR(pll)) {
+		if (pll != ERR_PTR(-EPROBE_DEFER))
 			pr_info("Invalid PLL clock ID %d specified\n", clk_id);
+
 		return ERR_CAST(pll);
 	}
 
 	return ccu_pll_get_clk_hw(pll);
 }
 
-static int ccu_pll_clk_register(struct ccu_pll_data *data)
+static int ccu_pll_clk_register(struct ccu_pll_data *data, bool defer)
 {
 	int idx, ret;
 
@@ -148,6 +153,14 @@ static int ccu_pll_clk_register(struct ccu_pll_data *data)
 		const struct ccu_pll_info *info = &pll_info[idx];
 		struct ccu_pll_init_data init = {0};
 
+		/* Defer non-basic PLLs allocation for the probe stage */
+		if (!!(info->features & CCU_PLL_BASIC) ^ defer) {
+			if (!data->plls[idx])
+				data->plls[idx] = ERR_PTR(-EPROBE_DEFER);
+
+			continue;
+		}
+
 		init.id = info->id;
 		init.name = info->name;
 		init.parent_name = info->parent_name;
@@ -155,6 +168,7 @@ static int ccu_pll_clk_register(struct ccu_pll_data *data)
 		init.sys_regs = data->sys_regs;
 		init.np = data->np;
 		init.flags = info->flags;
+		init.features = info->features;
 
 		data->plls[idx] = ccu_pll_hw_register(&init);
 		if (IS_ERR(data->plls[idx])) {
@@ -165,22 +179,70 @@ static int ccu_pll_clk_register(struct ccu_pll_data *data)
 		}
 	}
 
+	return 0;
+
+err_hw_unregister:
+	for (--idx; idx >= 0; --idx) {
+		if (!!(pll_info[idx].features & CCU_PLL_BASIC) ^ defer)
+			continue;
+
+		ccu_pll_hw_unregister(data->plls[idx]);
+	}
+
+	return ret;
+}
+
+static void ccu_pll_clk_unregister(struct ccu_pll_data *data, bool defer)
+{
+	int idx;
+
+	/* Uninstall only the clocks registered on the specfied stage */
+	for (idx = 0; idx < CCU_PLL_NUM; ++idx) {
+		if (!!(pll_info[idx].features & CCU_PLL_BASIC) ^ defer)
+			continue;
+
+		ccu_pll_hw_unregister(data->plls[idx]);
+	}
+}
+
+static int ccu_pll_of_register(struct ccu_pll_data *data)
+{
+	int ret;
+
 	ret = of_clk_add_hw_provider(data->np, ccu_pll_of_clk_hw_get, data);
 	if (ret) {
 		pr_err("Couldn't register PLL provider of '%s'\n",
 			of_node_full_name(data->np));
-		goto err_hw_unregister;
 	}
 
-	return 0;
+	return ret;
+}
 
-err_hw_unregister:
-	for (--idx; idx >= 0; --idx)
-		ccu_pll_hw_unregister(data->plls[idx]);
+static int ccu_pll_probe(struct platform_device *pdev)
+{
+	struct ccu_pll_data *data = pll_data;
 
-	return ret;
+	if (!data)
+		return -EINVAL;
+
+	return ccu_pll_clk_register(data, false);
 }
 
+static const struct of_device_id ccu_pll_of_match[] = {
+	{ .compatible = "baikal,bt1-ccu-pll" },
+	{ }
+};
+
+static struct platform_driver ccu_pll_driver = {
+	.probe  = ccu_pll_probe,
+	.driver = {
+		.name = "clk-ccu-pll",
+		.of_match_table = ccu_pll_of_match,
+		.suppress_bind_attrs = true,
+	},
+};
+builtin_platform_driver(ccu_pll_driver);
+
 static __init void ccu_pll_init(struct device_node *np)
 {
 	struct ccu_pll_data *data;
@@ -194,13 +256,22 @@ static __init void ccu_pll_init(struct device_node *np)
 	if (ret)
 		goto err_free_data;
 
-	ret = ccu_pll_clk_register(data);
+	ret = ccu_pll_clk_register(data, true);
 	if (ret)
 		goto err_free_data;
 
+	ret = ccu_pll_of_register(data);
+	if (ret)
+		goto err_clk_unregister;
+
+	pll_data = data;
+
 	return;
 
+err_clk_unregister:
+	ccu_pll_clk_unregister(data, true);
+
 err_free_data:
 	ccu_pll_free_data(data);
 }
-CLK_OF_DECLARE(ccu_pll, "baikal,bt1-ccu-pll", ccu_pll_init);
+CLK_OF_DECLARE_DRIVER(ccu_pll, "baikal,bt1-ccu-pll", ccu_pll_init);

drivers/clk/bcm/clk-bcm2835.c

@@ -30,6 +30,7 @@
 #include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/io.h>
+#include <linux/math.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
@@ -502,6 +503,8 @@ struct bcm2835_clock_data {
 	bool low_jitter;
 
 	u32 tcnt_mux;
+
+	bool round_up;
 };
 
 struct bcm2835_gate_data {
@@ -966,7 +969,7 @@ static u32 bcm2835_clock_choose_div(struct clk_hw *hw,
 	return div;
 }
 
-static long bcm2835_clock_rate_from_divisor(struct bcm2835_clock *clock,
+static unsigned long bcm2835_clock_rate_from_divisor(struct bcm2835_clock *clock,
 						     unsigned long parent_rate,
 						     u32 div)
 {
@@ -993,12 +996,34 @@ static long bcm2835_clock_rate_from_divisor(struct bcm2835_clock *clock,
 	return temp;
 }
 
+static unsigned long bcm2835_round_rate(unsigned long rate)
+{
+	unsigned long scaler;
+	unsigned long limit;
+
+	limit = rate / 100000;
+
+	scaler = 1;
+	while (scaler < limit)
+		scaler *= 10;
+
+	/*
+	 * If increasing a clock by less than 0.1% changes it
+	 * from ..999.. to ..000.., round up.
+	 */
+	if ((rate + scaler - 1) / scaler % 1000 == 0)
+		rate = roundup(rate, scaler);
+
+	return rate;
+}
+
 static unsigned long bcm2835_clock_get_rate(struct clk_hw *hw,
 					    unsigned long parent_rate)
 {
 	struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw);
 	struct bcm2835_cprman *cprman = clock->cprman;
 	const struct bcm2835_clock_data *data = clock->data;
+	unsigned long rate;
 	u32 div;
 
 	if (data->int_bits == 0 && data->frac_bits == 0)
@@ -1006,7 +1031,12 @@ static unsigned long bcm2835_clock_get_rate(struct clk_hw *hw,
 
 	div = cprman_read(cprman, data->div_reg);
 
-	return bcm2835_clock_rate_from_divisor(clock, parent_rate, div);
+	rate = bcm2835_clock_rate_from_divisor(clock, parent_rate, div);
+
+	if (data->round_up)
+		rate = bcm2835_round_rate(rate);
+
+	return rate;
 }
 
 static void bcm2835_clock_wait_busy(struct bcm2835_clock *clock)
@@ -1784,7 +1814,7 @@ static const struct bcm2835_clk_desc clk_desc_array[] = {
 		.load_mask = CM_PLLC_LOADPER,
 		.hold_mask = CM_PLLC_HOLDPER,
 		.fixed_divider = 1,
-		.flags = CLK_SET_RATE_PARENT),
+		.flags = CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
 
 	/*
 	 * PLLD is the display PLL, used to drive DSI display panels.
@@ -2143,7 +2173,8 @@ static const struct bcm2835_clk_desc clk_desc_array[] = {
 		.div_reg = CM_UARTDIV,
 		.int_bits = 10,
 		.frac_bits = 12,
-		.tcnt_mux = 28),
+		.tcnt_mux = 28,
+		.round_up = true),
 
 	/* TV encoder clock.  Only operating frequency is 108Mhz.  */
 	[BCM2835_CLOCK_VEC]	= REGISTER_PER_CLK(

drivers/clk/bcm/clk-raspberrypi.c

@@ -33,6 +33,7 @@ enum rpi_firmware_clk_id {
 	RPI_FIRMWARE_EMMC2_CLK_ID,
 	RPI_FIRMWARE_M2MC_CLK_ID,
 	RPI_FIRMWARE_PIXEL_BVB_CLK_ID,
+	RPI_FIRMWARE_VEC_CLK_ID,
 	RPI_FIRMWARE_NUM_CLK_ID,
 };
 
@@ -51,6 +52,7 @@ static char *rpi_firmware_clk_names[] = {
 	[RPI_FIRMWARE_EMMC2_CLK_ID]	= "emmc2",
 	[RPI_FIRMWARE_M2MC_CLK_ID]	= "m2mc",
 	[RPI_FIRMWARE_PIXEL_BVB_CLK_ID]	= "pixel-bvb",
+	[RPI_FIRMWARE_VEC_CLK_ID]	= "vec",
 };
 
 #define RPI_FIRMWARE_STATE_ENABLE_BIT	BIT(0)
@@ -129,9 +131,18 @@ raspberrypi_clk_variants[RPI_FIRMWARE_NUM_CLK_ID] = {
 	[RPI_FIRMWARE_V3D_CLK_ID] = {
 		.export = true,
 	},
+	[RPI_FIRMWARE_PIXEL_CLK_ID] = {
+		.export = true,
+	},
+	[RPI_FIRMWARE_HEVC_CLK_ID] = {
+		.export = true,
+	},
 	[RPI_FIRMWARE_PIXEL_BVB_CLK_ID] = {
 		.export = true,
 	},
+	[RPI_FIRMWARE_VEC_CLK_ID] = {
+		.export = true,
+	},
 };
 
 /*

include/dt-bindings/reset/bt1-ccu.h

@@ -21,5 +21,14 @@
 
 #define CCU_SYS_SATA_REF_RST		0
 #define CCU_SYS_APB_RST			1
+#define CCU_SYS_DDR_FULL_RST		2
+#define CCU_SYS_DDR_INIT_RST		3
+#define CCU_SYS_PCIE_PCS_PHY_RST	4
+#define CCU_SYS_PCIE_PIPE0_RST		5
+#define CCU_SYS_PCIE_CORE_RST		6
+#define CCU_SYS_PCIE_PWR_RST		7
+#define CCU_SYS_PCIE_STICKY_RST		8
+#define CCU_SYS_PCIE_NSTICKY_RST	9
+#define CCU_SYS_PCIE_HOT_RST		10
 
 #endif /* __DT_BINDINGS_RESET_BT1_CCU_H */