Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted

Pull pin control updates from Linus Walleij:
 "Core changes:

   - Use the non-blocking mux_state_try_select() in the generic MUX pin
     control back-end

   - Free pin maps on pinctrl_generic_to_map() failure in the core
     helpers

  New hardware pin control:

   - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC
     (this is for the low power audio, LPASS = Low Power Audio SubSystem
     portions)

   - Upboard support on top of the Intel pin controller

   - Apple T6030 and T6031 support (just compatible strings)

   - Samsung Exynos 8855 SoC

   - Mediatek MT6858 SoC

   - Rockchip RK3308B and RV1106 SoCs

   - Airoha EN7523 and AN7563 SoCs

  Improvements:

   - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable

   - Qualcomm improvements on top of the Qualcomm PDC (power domain
     controller) irqchip improvements from tglx:s tree

   - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups

   - The NPCM8xx driver has been put into shape fixing many pin and
     group definitions

   - Some non-urgent Tegra 264 pin assignments are fixed up

   - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and
     pin assignments, missing features etc"

* tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits)
  dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema
  pinctrl: meson: sync some modify from A4
  pinctrl: meson: a4: Add input enable pin configuration
  pinctrl: realtek: rtd1625: remove unused group name spdif_sel
  pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13
  dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema
  Revert "Merge branch 'ib-rsk7204' into devel"
  pinctrl: rockchip: Add RV1106 pinctrl support
  dt-bindings: pinctrl: rockchip: Add RV1106 compatible
  pinctrl: rockchip: Decode drive strength in the get function
  pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable
  pinctrl: airoha: add support of an7563 SoC
  dt-bindings: pinctrl: airoha: add support of an7563 pin controller
  pinctrl: airoha: try to find chip scu node by phandle first
  pinctrl: airoha: add support of en7523 SoC
  dt-bindings: pinctrl: airoha: add support of en7523 pin controller
  pinctrl: airoha: an7583: add support for olt pinmux
  pinctrl: airoha: an7583: add support for pon_alt pinmux
  pinctrl: airoha: an7583: add support for npu_uart pinmux
  dt-bindings: pinctrl: airoha: an7583: add missed features
  ...

1 files changed, 202 insertions, 0 deletions

diff --git a/lib/flex_proportions.c b/lib/flex_proportions.c
new file mode 100644
index 000000000..012d5614e
--- /dev/null
+++ b/lib/flex_proportions.c
@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Floating proportions with flexible aging period
+ *
+ *   Copyright (C) 2011, SUSE, Jan Kara <jack@suse.cz>
+ *
+ * The goal of this code is: Given different types of event, measure proportion
+ * of each type of event over time. The proportions are measured with
+ * exponentially decaying history to give smooth transitions. A formula
+ * expressing proportion of event of type 'j' is:
+ *
+ *   p_{j} = (\Sum_{i>=0} x_{i,j}/2^{i+1})/(\Sum_{i>=0} x_i/2^{i+1})
+ *
+ * Where x_{i,j} is j's number of events in i-th last time period and x_i is
+ * total number of events in i-th last time period.
+ *
+ * Note that p_{j}'s are normalised, i.e.
+ *
+ *   \Sum_{j} p_{j} = 1,
+ *
+ * This formula can be straightforwardly computed by maintaining denominator
+ * (let's call it 'd') and for each event type its numerator (let's call it
+ * 'n_j'). When an event of type 'j' happens, we simply need to do:
+ *   n_j++; d++;
+ *
+ * When a new period is declared, we could do:
+ *   d /= 2
+ *   for each j
+ *     n_j /= 2
+ *
+ * To avoid iteration over all event types, we instead shift numerator of event
+ * j lazily when someone asks for a proportion of event j or when event j
+ * occurs. This can bit trivially implemented by remembering last period in
+ * which something happened with proportion of type j.
+ */
+#include <linux/flex_proportions.h>
+
+int fprop_global_init(struct fprop_global *p, gfp_t gfp)
+{
+	int err;
+
+	p->period = 0;
+	/* Use 1 to avoid dealing with periods with 0 events... */
+	err = percpu_counter_init(&p->events, 1, gfp);
+	if (err)
+		return err;
+	seqcount_init(&p->sequence);
+	return 0;
+}
+
+void fprop_global_destroy(struct fprop_global *p)
+{
+	percpu_counter_destroy(&p->events);
+}
+
+/*
+ * Declare @periods new periods. It is upto the caller to make sure period
+ * transitions cannot happen in parallel.
+ *
+ * The function returns true if the proportions are still defined and false
+ * if aging zeroed out all events. This can be used to detect whether declaring
+ * further periods has any effect.
+ */
+bool fprop_new_period(struct fprop_global *p, int periods)
+{
+	s64 events = percpu_counter_sum(&p->events);
+	unsigned long flags;
+
+	/*
+	 * Don't do anything if there are no events.
+	 */
+	if (events <= 1)
+		return false;
+	local_irq_save(flags);
+	write_seqcount_begin(&p->sequence);
+	if (periods < 64)
+		events -= events >> periods;
+	/* Use addition to avoid losing events happening between sum and set */
+	percpu_counter_add(&p->events, -events);
+	p->period += periods;
+	write_seqcount_end(&p->sequence);
+	local_irq_restore(flags);
+
+	return true;
+}
+
+/*
+ * ---- PERCPU ----
+ */
+#define PROP_BATCH (8*(1+ilog2(nr_cpu_ids)))
+
+int fprop_local_init_percpu(struct fprop_local_percpu *pl, gfp_t gfp)
+{
+	int err;
+
+	err = percpu_counter_init(&pl->events, 0, gfp);
+	if (err)
+		return err;
+	pl->period = 0;
+	raw_spin_lock_init(&pl->lock);
+	return 0;
+}
+
+void fprop_local_destroy_percpu(struct fprop_local_percpu *pl)
+{
+	percpu_counter_destroy(&pl->events);
+}
+
+static void fprop_reflect_period_percpu(struct fprop_global *p,
+					struct fprop_local_percpu *pl)
+{
+	unsigned int period = p->period;
+	unsigned long flags;
+
+	/* Fast path - period didn't change */
+	if (pl->period == period)
+		return;
+	raw_spin_lock_irqsave(&pl->lock, flags);
+	/* Someone updated pl->period while we were spinning? */
+	if (pl->period >= period) {
+		raw_spin_unlock_irqrestore(&pl->lock, flags);
+		return;
+	}
+	/* Aging zeroed our fraction? */
+	if (period - pl->period < BITS_PER_LONG) {
+		s64 val = percpu_counter_read(&pl->events);
+
+		if (val < (nr_cpu_ids * PROP_BATCH))
+			val = percpu_counter_sum(&pl->events);
+
+		percpu_counter_add_batch(&pl->events,
+			-val + (val >> (period-pl->period)), PROP_BATCH);
+	} else
+		percpu_counter_set(&pl->events, 0);
+	pl->period = period;
+	raw_spin_unlock_irqrestore(&pl->lock, flags);
+}
+
+/* Event of type pl happened */
+void __fprop_add_percpu(struct fprop_global *p, struct fprop_local_percpu *pl,
+		long nr)
+{
+	fprop_reflect_period_percpu(p, pl);
+	percpu_counter_add_batch(&pl->events, nr, PROP_BATCH);
+	percpu_counter_add(&p->events, nr);
+}
+
+void fprop_fraction_percpu(struct fprop_global *p,
+			   struct fprop_local_percpu *pl,
+			   unsigned long *numerator, unsigned long *denominator)
+{
+	unsigned int seq;
+	s64 num, den;
+
+	do {
+		seq = read_seqcount_begin(&p->sequence);
+		fprop_reflect_period_percpu(p, pl);
+		num = percpu_counter_read_positive(&pl->events);
+		den = percpu_counter_read_positive(&p->events);
+	} while (read_seqcount_retry(&p->sequence, seq));
+
+	/*
+	 * Make fraction <= 1 and denominator > 0 even in presence of percpu
+	 * counter errors
+	 */
+	if (den <= num) {
+		if (num)
+			den = num;
+		else
+			den = 1;
+	}
+	*denominator = den;
+	*numerator = num;
+}
+
+/*
+ * Like __fprop_add_percpu() except that event is counted only if the given
+ * type has fraction smaller than @max_frac/FPROP_FRAC_BASE
+ */
+void __fprop_add_percpu_max(struct fprop_global *p,
+		struct fprop_local_percpu *pl, int max_frac, long nr)
+{
+	if (unlikely(max_frac < FPROP_FRAC_BASE)) {
+		unsigned long numerator, denominator;
+		s64 tmp;
+
+		fprop_fraction_percpu(p, pl, &numerator, &denominator);
+		/* Adding 'nr' to fraction exceeds max_frac/FPROP_FRAC_BASE? */
+		tmp = (u64)denominator * max_frac -
+					((u64)numerator << FPROP_FRAC_SHIFT);
+		if (tmp < 0) {
+			/* Maximum fraction already exceeded? */
+			return;
+		} else if (tmp < nr * (FPROP_FRAC_BASE - max_frac)) {
+			/* Add just enough for the fraction to saturate */
+			nr = div_u64(tmp + FPROP_FRAC_BASE - max_frac - 1,
+					FPROP_FRAC_BASE - max_frac);
+		}
+	}
+
+	__fprop_add_percpu(p, pl, nr);
+}