Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull clk updates from Stephen Boyd:
 "The core framework has a handful of patches this time around, mostly
  due to the clk rate protection support added by Jerome Brunet.

  This feature will allow consumers to lock in a certain rate on the
  output of a clk so that things like audio playback don't hear pops
  when the clk frequency changes due to shared parent clks changing
  rates. Currently the clk API doesn't guarantee the rate of a clk stays
  at the rate you request after clk_set_rate() is called, so this new
  API will allow drivers to express that requirement.

  Beyond this, the core got some debugfs pretty printing patches and a
  couple minor non-critical fixes.

  Looking outside of the core framework diff we have some new driver
  additions and the removal of a legacy TI clk driver. Both of these hit
  high in the dirstat. Also, the removal of the asm-generic/clkdev.h
  file causes small one-liners in all the architecture Kbuild files.

  Overall, the driver diff seems to be the normal stuff that comes all
  the time to fix little problems here and there and to support new
  hardware.

  Summary:

  Core:
   - Clk rate protection
   - Symbolic clk flags in debugfs output
   - Clk registration enabled clks while doing bookkeeping updates

  New Drivers:
   - Spreadtrum SC9860
   - HiSilicon hi3660 stub
   - Qualcomm A53 PLL, SPMI clkdiv, and MSM8916 APCS
   - Amlogic Meson-AXG
   - ASPEED BMC

  Removed Drivers:
   - TI OMAP 3xxx legacy clk (non-DT) support
   - asm*/clkdev.h got removed (not really a driver)

  Updates:
   - Renesas FDP1-0 module clock on R-Car M3-W
   - Renesas LVDS module clock on R-Car V3M
   - Misc fixes to pr_err() prints
   - Qualcomm MSM8916 audio fixes
   - Qualcomm IPQ8074 rounded out support for more peripherals
   - Qualcomm Alpha PLL variants
   - Divider code was using container_of() on bad pointers
   - Allwinner DE2 clks on H3
   - Amlogic minor data fixes and dropping of CLK_IGNORE_UNUSED
   - Mediatek clk driver compile test support
   - AT91 PMC clk suspend/resume restoration support
   - PLL issues fixed on si5351
   - Broadcom IProc PLL calculation updates
   - DVFS support for Armada mvebu CPU clks
   - Allwinner fixed post-divider support
   - TI clkctrl fixes and support for newer SoCs"

* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (125 commits)
  clk: aspeed: Handle inverse polarity of USB port 1 clock gate
  clk: aspeed: Fix return value check in aspeed_cc_init()
  clk: aspeed: Add reset controller
  clk: aspeed: Register gated clocks
  clk: aspeed: Add platform driver and register PLLs
  clk: aspeed: Register core clocks
  clk: Add clock driver for ASPEED BMC SoCs
  clk: mediatek: adjust dependency of reset.c to avoid unexpectedly being built
  clk: fix reentrancy of clk_enable() on UP systems
  clk: meson-axg: fix potential NULL dereference in axg_clkc_probe()
  clk: Simplify debugfs registration
  clk: Fix debugfs_create_*() usage
  clk: Show symbolic clock flags in debugfs
  clk: renesas: r8a7796: Add FDP clock
  clk: Move __clk_{get,put}() into private clk.h API
  clk: sunxi: Use CLK_IS_CRITICAL flag for critical clks
  clk: Improve flags doc for of_clk_detect_critical()
  arch: Remove clkdev.h asm-generic from Kbuild
  clk: sunxi-ng: a83t: Add M divider to TCON1 clock
  clk: Prepare to remove asm-generic/clkdev.h
  ...

1 files changed, 296 insertions, 21 deletions

diff --git a/drivers/clk/mvebu/armada-37xx-periph.c b/drivers/clk/mvebu/armada-37xx-periph.c
index cecb0fd..87213ea 100644
--- a/drivers/clk/mvebu/armada-37xx-periph.c
+++ b/drivers/clk/mvebu/armada-37xx-periph.c
@@ -21,9 +21,11 @@
  */
 
 #include <linux/clk-provider.h>
+#include <linux/mfd/syscon.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
+#include <linux/regmap.h>
 #include <linux/slab.h>
 
 #define TBG_SEL		0x0
@@ -33,6 +35,26 @@
 #define CLK_SEL		0x10
 #define CLK_DIS		0x14
 
+#define LOAD_LEVEL_NR	4
+
+#define ARMADA_37XX_NB_L0L1	0x18
+#define ARMADA_37XX_NB_L2L3	0x1C
+#define		ARMADA_37XX_NB_TBG_DIV_OFF	13
+#define		ARMADA_37XX_NB_TBG_DIV_MASK	0x7
+#define		ARMADA_37XX_NB_CLK_SEL_OFF	11
+#define		ARMADA_37XX_NB_CLK_SEL_MASK	0x1
+#define		ARMADA_37XX_NB_TBG_SEL_OFF	9
+#define		ARMADA_37XX_NB_TBG_SEL_MASK	0x3
+#define		ARMADA_37XX_NB_CONFIG_SHIFT	16
+#define ARMADA_37XX_NB_DYN_MOD	0x24
+#define		ARMADA_37XX_NB_DFS_EN	31
+#define ARMADA_37XX_NB_CPU_LOAD	0x30
+#define		ARMADA_37XX_NB_CPU_LOAD_MASK	0x3
+#define		ARMADA_37XX_DVFS_LOAD_0		0
+#define		ARMADA_37XX_DVFS_LOAD_1		1
+#define		ARMADA_37XX_DVFS_LOAD_2		2
+#define		ARMADA_37XX_DVFS_LOAD_3		3
+
 struct clk_periph_driver_data {
 	struct clk_hw_onecell_data *hw_data;
 	spinlock_t lock;
@@ -46,7 +68,18 @@ struct clk_double_div {
 	u8 shift2;
 };
 
+struct clk_pm_cpu {
+	struct clk_hw hw;
+	void __iomem *reg_mux;
+	u8 shift_mux;
+	u32 mask_mux;
+	void __iomem *reg_div;
+	u8 shift_div;
+	struct regmap *nb_pm_base;
+};
+
 #define to_clk_double_div(_hw) container_of(_hw, struct clk_double_div, hw)
+#define to_clk_pm_cpu(_hw) container_of(_hw, struct clk_pm_cpu, hw)
 
 struct clk_periph_data {
 	const char *name;
@@ -55,6 +88,7 @@ struct clk_periph_data {
 	struct clk_hw *mux_hw;
 	struct clk_hw *rate_hw;
 	struct clk_hw *gate_hw;
+	struct clk_hw *muxrate_hw;
 	bool is_double_div;
 };
 
@@ -79,7 +113,9 @@ static const struct clk_div_table clk_table2[] = {
 	{ .val = 1, .div = 4, },
 	{ .val = 0, .div = 0, }, /* last entry */
 };
+
 static const struct clk_ops clk_double_div_ops;
+static const struct clk_ops clk_pm_cpu_ops;
 
 #define PERIPH_GATE(_name, _bit)		\
 struct clk_gate gate_##_name = {		\
@@ -121,6 +157,18 @@ struct clk_divider rate_##_name = {		\
 	}					\
 };
 
+#define PERIPH_PM_CPU(_name, _shift1, _reg, _shift2)	\
+struct clk_pm_cpu muxrate_##_name = {		\
+	.reg_mux = (void *)TBG_SEL,		\
+	.mask_mux = 3,				\
+	.shift_mux = _shift1,			\
+	.reg_div = (void *)_reg,		\
+	.shift_div = _shift2,			\
+	.hw.init = &(struct clk_init_data){	\
+		.ops =  &clk_pm_cpu_ops,	\
+	}					\
+};
+
 #define PERIPH_CLK_FULL_DD(_name, _bit, _shift, _reg1, _reg2, _shift1, _shift2)\
 static PERIPH_GATE(_name, _bit);			    \
 static PERIPH_MUX(_name, _shift);			    \
@@ -135,10 +183,6 @@ static PERIPH_DIV(_name, _reg, _shift1, _table);
 static PERIPH_GATE(_name, _bit);			\
 static PERIPH_DIV(_name, _reg, _shift, _table);
 
-#define PERIPH_CLK_MUX_DIV(_name, _shift,  _reg, _shift_div, _table)	\
-static PERIPH_MUX(_name, _shift);			    \
-static PERIPH_DIV(_name, _reg, _shift_div, _table);
-
 #define PERIPH_CLK_MUX_DD(_name, _shift, _reg1, _reg2, _shift1, _shift2)\
 static PERIPH_MUX(_name, _shift);			    \
 static PERIPH_DOUBLEDIV(_name, _reg1, _reg2, _shift1, _shift2);
@@ -179,13 +223,12 @@ static PERIPH_DOUBLEDIV(_name, _reg1, _reg2, _shift1, _shift2);
 	  .rate_hw = &rate_##_name.hw,				\
 	}
 
-#define REF_CLK_MUX_DIV(_name)				\
+#define REF_CLK_PM_CPU(_name)				\
 	{ .name = #_name,				\
 	  .parent_names = (const char *[]){ "TBG-A-P",	\
 	      "TBG-B-P", "TBG-A-S", "TBG-B-S"},		\
 	  .num_parents = 4,				\
-	  .mux_hw = &mux_##_name.hw,			\
-	  .rate_hw = &rate_##_name.hw,			\
+	  .muxrate_hw = &muxrate_##_name.hw,		\
 	}
 
 #define REF_CLK_MUX_DD(_name)				\
@@ -215,9 +258,9 @@ PERIPH_CLK_FULL_DD(ddr_fclk, 21, 16, DIV_SEL0, DIV_SEL0, 15, 12);
 PERIPH_CLK_FULL(trace, 22, 18, DIV_SEL0, 20, clk_table6);
 PERIPH_CLK_FULL(counter, 23, 20, DIV_SEL0, 23, clk_table6);
 PERIPH_CLK_FULL_DD(eip97, 24, 24, DIV_SEL2, DIV_SEL2, 22, 19);
-PERIPH_CLK_MUX_DIV(cpu, 22, DIV_SEL0, 28, clk_table6);
+static PERIPH_PM_CPU(cpu, 22, DIV_SEL0, 28);
 
-static struct clk_periph_data data_nb[] ={
+static struct clk_periph_data data_nb[] = {
 	REF_CLK_FULL_DD(mmc),
 	REF_CLK_FULL_DD(sata_host),
 	REF_CLK_FULL_DD(sec_at),
@@ -234,7 +277,7 @@ static struct clk_periph_data data_nb[] ={
 	REF_CLK_FULL(trace),
 	REF_CLK_FULL(counter),
 	REF_CLK_FULL_DD(eip97),
-	REF_CLK_MUX_DIV(cpu),
+	REF_CLK_PM_CPU(cpu),
 	{ },
 };
 
@@ -281,7 +324,7 @@ static unsigned int get_div(void __iomem *reg, int shift)
 }
 
 static unsigned long clk_double_div_recalc_rate(struct clk_hw *hw,
-		unsigned long parent_rate)
+						unsigned long parent_rate)
 {
 	struct clk_double_div *double_div = to_clk_double_div(hw);
 	unsigned int div;
@@ -296,6 +339,222 @@ static const struct clk_ops clk_double_div_ops = {
 	.recalc_rate = clk_double_div_recalc_rate,
 };
 
+static void armada_3700_pm_dvfs_update_regs(unsigned int load_level,
+					    unsigned int *reg,
+					    unsigned int *offset)
+{
+	if (load_level <= ARMADA_37XX_DVFS_LOAD_1)
+		*reg = ARMADA_37XX_NB_L0L1;
+	else
+		*reg = ARMADA_37XX_NB_L2L3;
+
+	if (load_level == ARMADA_37XX_DVFS_LOAD_0 ||
+	    load_level ==  ARMADA_37XX_DVFS_LOAD_2)
+		*offset += ARMADA_37XX_NB_CONFIG_SHIFT;
+}
+
+static bool armada_3700_pm_dvfs_is_enabled(struct regmap *base)
+{
+	unsigned int val, reg = ARMADA_37XX_NB_DYN_MOD;
+
+	if (IS_ERR(base))
+		return false;
+
+	regmap_read(base, reg, &val);
+
+	return !!(val & BIT(ARMADA_37XX_NB_DFS_EN));
+}
+
+static unsigned int armada_3700_pm_dvfs_get_cpu_div(struct regmap *base)
+{
+	unsigned int reg = ARMADA_37XX_NB_CPU_LOAD;
+	unsigned int offset = ARMADA_37XX_NB_TBG_DIV_OFF;
+	unsigned int load_level, div;
+
+	/*
+	 * This function is always called after the function
+	 * armada_3700_pm_dvfs_is_enabled, so no need to check again
+	 * if the base is valid.
+	 */
+	regmap_read(base, reg, &load_level);
+
+	/*
+	 * The register and the offset inside this register accessed to
+	 * read the current divider depend on the load level
+	 */
+	load_level &= ARMADA_37XX_NB_CPU_LOAD_MASK;
+	armada_3700_pm_dvfs_update_regs(load_level, &reg, &offset);
+
+	regmap_read(base, reg, &div);
+
+	return (div >> offset) & ARMADA_37XX_NB_TBG_DIV_MASK;
+}
+
+static unsigned int armada_3700_pm_dvfs_get_cpu_parent(struct regmap *base)
+{
+	unsigned int reg = ARMADA_37XX_NB_CPU_LOAD;
+	unsigned int offset = ARMADA_37XX_NB_TBG_SEL_OFF;
+	unsigned int load_level, sel;
+
+	/*
+	 * This function is always called after the function
+	 * armada_3700_pm_dvfs_is_enabled, so no need to check again
+	 * if the base is valid
+	 */
+	regmap_read(base, reg, &load_level);
+
+	/*
+	 * The register and the offset inside this register accessed to
+	 * read the current divider depend on the load level
+	 */
+	load_level &= ARMADA_37XX_NB_CPU_LOAD_MASK;
+	armada_3700_pm_dvfs_update_regs(load_level, &reg, &offset);
+
+	regmap_read(base, reg, &sel);
+
+	return (sel >> offset) & ARMADA_37XX_NB_TBG_SEL_MASK;
+}
+
+static u8 clk_pm_cpu_get_parent(struct clk_hw *hw)
+{
+	struct clk_pm_cpu *pm_cpu = to_clk_pm_cpu(hw);
+	int num_parents = clk_hw_get_num_parents(hw);
+	u32 val;
+
+	if (armada_3700_pm_dvfs_is_enabled(pm_cpu->nb_pm_base)) {
+		val = armada_3700_pm_dvfs_get_cpu_parent(pm_cpu->nb_pm_base);
+	} else {
+		val = readl(pm_cpu->reg_mux) >> pm_cpu->shift_mux;
+		val &= pm_cpu->mask_mux;
+	}
+
+	if (val >= num_parents)
+		return -EINVAL;
+
+	return val;
+}
+
+static int clk_pm_cpu_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct clk_pm_cpu *pm_cpu = to_clk_pm_cpu(hw);
+	struct regmap *base = pm_cpu->nb_pm_base;
+	int load_level;
+
+	/*
+	 * We set the clock parent only if the DVFS is available but
+	 * not enabled.
+	 */
+	if (IS_ERR(base) || armada_3700_pm_dvfs_is_enabled(base))
+		return -EINVAL;
+
+	/* Set the parent clock for all the load level */
+	for (load_level = 0; load_level < LOAD_LEVEL_NR; load_level++) {
+		unsigned int reg, mask,  val,
+			offset = ARMADA_37XX_NB_TBG_SEL_OFF;
+
+		armada_3700_pm_dvfs_update_regs(load_level, &reg, &offset);
+
+		val = index << offset;
+		mask = ARMADA_37XX_NB_TBG_SEL_MASK << offset;
+		regmap_update_bits(base, reg, mask, val);
+	}
+	return 0;
+}
+
+static unsigned long clk_pm_cpu_recalc_rate(struct clk_hw *hw,
+					    unsigned long parent_rate)
+{
+	struct clk_pm_cpu *pm_cpu = to_clk_pm_cpu(hw);
+	unsigned int div;
+
+	if (armada_3700_pm_dvfs_is_enabled(pm_cpu->nb_pm_base))
+		div = armada_3700_pm_dvfs_get_cpu_div(pm_cpu->nb_pm_base);
+	else
+		div = get_div(pm_cpu->reg_div, pm_cpu->shift_div);
+	return DIV_ROUND_UP_ULL((u64)parent_rate, div);
+}
+
+static long clk_pm_cpu_round_rate(struct clk_hw *hw, unsigned long rate,
+				  unsigned long *parent_rate)
+{
+	struct clk_pm_cpu *pm_cpu = to_clk_pm_cpu(hw);
+	struct regmap *base = pm_cpu->nb_pm_base;
+	unsigned int div = *parent_rate / rate;
+	unsigned int load_level;
+	/* only available when DVFS is enabled */
+	if (!armada_3700_pm_dvfs_is_enabled(base))
+		return -EINVAL;
+
+	for (load_level = 0; load_level < LOAD_LEVEL_NR; load_level++) {
+		unsigned int reg, val, offset = ARMADA_37XX_NB_TBG_DIV_OFF;
+
+		armada_3700_pm_dvfs_update_regs(load_level, &reg, &offset);
+
+		regmap_read(base, reg, &val);
+
+		val >>= offset;
+		val &= ARMADA_37XX_NB_TBG_DIV_MASK;
+		if (val == div)
+			/*
+			 * We found a load level matching the target
+			 * divider, switch to this load level and
+			 * return.
+			 */
+			return *parent_rate / div;
+	}
+
+	/* We didn't find any valid divider */
+	return -EINVAL;
+}
+
+static int clk_pm_cpu_set_rate(struct clk_hw *hw, unsigned long rate,
+			       unsigned long parent_rate)
+{
+	struct clk_pm_cpu *pm_cpu = to_clk_pm_cpu(hw);
+	struct regmap *base = pm_cpu->nb_pm_base;
+	unsigned int div = parent_rate / rate;
+	unsigned int load_level;
+
+	/* only available when DVFS is enabled */
+	if (!armada_3700_pm_dvfs_is_enabled(base))
+		return -EINVAL;
+
+	for (load_level = 0; load_level < LOAD_LEVEL_NR; load_level++) {
+		unsigned int reg, mask, val,
+			offset = ARMADA_37XX_NB_TBG_DIV_OFF;
+
+		armada_3700_pm_dvfs_update_regs(load_level, &reg, &offset);
+
+		regmap_read(base, reg, &val);
+		val >>= offset;
+		val &= ARMADA_37XX_NB_TBG_DIV_MASK;
+
+		if (val == div) {
+			/*
+			 * We found a load level matching the target
+			 * divider, switch to this load level and
+			 * return.
+			 */
+			reg = ARMADA_37XX_NB_CPU_LOAD;
+			mask = ARMADA_37XX_NB_CPU_LOAD_MASK;
+			regmap_update_bits(base, reg, mask, load_level);
+
+			return rate;
+		}
+	}
+
+	/* We didn't find any valid divider */
+	return -EINVAL;
+}
+
+static const struct clk_ops clk_pm_cpu_ops = {
+	.get_parent = clk_pm_cpu_get_parent,
+	.set_parent = clk_pm_cpu_set_parent,
+	.round_rate = clk_pm_cpu_round_rate,
+	.set_rate = clk_pm_cpu_set_rate,
+	.recalc_rate = clk_pm_cpu_recalc_rate,
+};
+
 static const struct of_device_id armada_3700_periph_clock_of_match[] = {
 	{ .compatible = "marvell,armada-3700-periph-clock-nb",
 	  .data = data_nb, },
@@ -303,6 +562,7 @@ static const struct of_device_id armada_3700_periph_clock_of_match[] = {
 	.data = data_sb, },
 	{ }
 };
+
 static int armada_3700_add_composite_clk(const struct clk_periph_data *data,
 					 void __iomem *reg, spinlock_t *lock,
 					 struct device *dev, struct clk_hw **hw)
@@ -354,15 +614,31 @@ static int armada_3700_add_composite_clk(const struct clk_periph_data *data,
 		}
 	}
 
-	*hw = clk_hw_register_composite(dev, data->name, data->parent_names,
-				       data->num_parents, mux_hw,
-				       mux_ops, rate_hw, rate_ops,
-				       gate_hw, gate_ops, CLK_IGNORE_UNUSED);
+	if (data->muxrate_hw) {
+		struct clk_pm_cpu *pmcpu_clk;
+		struct clk_hw *muxrate_hw = data->muxrate_hw;
+		struct regmap *map;
 
-	if (IS_ERR(*hw))
-		return PTR_ERR(*hw);
+		pmcpu_clk =  to_clk_pm_cpu(muxrate_hw);
+		pmcpu_clk->reg_mux = reg + (u64)pmcpu_clk->reg_mux;
+		pmcpu_clk->reg_div = reg + (u64)pmcpu_clk->reg_div;
 
-	return 0;
+		mux_hw = muxrate_hw;
+		rate_hw = muxrate_hw;
+		mux_ops = muxrate_hw->init->ops;
+		rate_ops = muxrate_hw->init->ops;
+
+		map = syscon_regmap_lookup_by_compatible(
+				"marvell,armada-3700-nb-pm");
+		pmcpu_clk->nb_pm_base = map;
+	}
+
+	*hw = clk_hw_register_composite(dev, data->name, data->parent_names,
+					data->num_parents, mux_hw,
+					mux_ops, rate_hw, rate_ops,
+					gate_hw, gate_ops, CLK_IGNORE_UNUSED);
+
+	return PTR_ERR_OR_ZERO(*hw);
 }
 
 static int armada_3700_periph_clock_probe(struct platform_device *pdev)
@@ -406,12 +682,11 @@ static int armada_3700_periph_clock_probe(struct platform_device *pdev)
 		if (armada_3700_add_composite_clk(&data[i], reg,
 						  &driver_data->lock, dev, hw))
 			dev_err(dev, "Can't register periph clock %s\n",
-			       data[i].name);
-
+				data[i].name);
 	}
 
 	ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get,
-				  driver_data->hw_data);
+				     driver_data->hw_data);
 	if (ret) {
 		for (i = 0; i < num_periph; i++)
 			clk_hw_unregister(driver_data->hw_data->hws[i]);