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

Pull clk updates from Stephen Boyd:
 "This is all driver updates, the majority of which is a bunch of new
  Qualcomm clk drivers that dominate the diffstat because we add support
  for six SoCs from that particular vendor.

  The other big change is the removal of various clk drivers that are no
  longer used now that the kernel is dropping support for those SoCs.

  Beyond that there's the usual non-critical fixes for existing drivers
  and a good number of patches from Lee Jones that cleanup a bunch of
  W=1 enabled builds.

  Removed Drivers:
   - Remove efm32 clk driver
   - Remove tango4 clk driver
   - Remove zte zx clk driver
   - Remove sirf prima2/atlast clk drivers
   - Remove u300 clk driver

  New Drivers:
   - PLL support on MStar/SigmaStar ARMv7 SoCs
   - CPU clks for Qualcomm SDX55
   - GCC and RPMh clks for Qualcomm SC8180x and SC7280 SoCs
   - GCC clks for Qualcomm SM8350
   - GPU clks for Qualcomm SDM660/SDM630

  Updates:
   - Video clk fixups on Qualcomm SM8250
   - Improvements for multimedia clks on Qualcomm MSM8998
   - Fix many warnings with W=1 enabled builds under drivers/clk/
   - Support crystal load capacitance for Versaclock VC5
   - Add a "skip recall" DT binding for Silicon Labs' si570 to avoid
     glitches at boot
   - Convert Xilinx VCU clk driver to a proper clk provider driver
   - Expose Xilinx ZynqMP clk driver to more platforms
   - Amlogic pll driver fixup
   - Amlogic meson8b clock controller dt support clean up
   - Remove mipi clk from the Amlogic axg clock controller
   - New Rockchip rk3368 clock ids related to camera input
   - Use pr_notice() instead of pr_warn() on i.MX6Q pre-boot ldb_di_clk
     reparenting
   - A series from Liu Ying that adds some SCU clocks support for
     i.MX8qxp DC0/MIPI-LVDS subsystems
   - A series from Lucas Stach that adds PLL monitor clocks for i.MX8MQ,
     and clkout1/2 support for i.MX8MM/MN
   - Add I2c and Ethernet (RAVB) clocks on Renesas R-Car V3U
   - Add timer (TMU) clocks on most Renesas R-Car Gen3 SoCs
   - Add video-related (FCPVD/VSPD/VSPX), watchdog (RWDT), serial
     (HSCIF), pincontrol/GPIO (PFC/GPIO), SPI (MSIOF), SDHI, and DMA
     (SYS-DMAC) clocks on Renesas R-Car V3U
   - Add support for the USB 2.0 clock selector on Renesas RZ/G2 SoCs
   - Allwinner H616 SoC clk support"

* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (171 commits)
  clk: mstar: msc313-mpll: Fix format specifier
  clk: mstar: Allow MStar clk drivers to be compile tested
  clk: qoriq: use macros to generate pll_mask
  clk: qcom: Add Global Clock controller (GCC) driver for SC7280
  dt-bindings: clock: Add SC7280 GCC clock binding
  clk: qcom: rpmh: Add support for RPMH clocks on SC7280
  dt-bindings: clock: Add RPMHCC bindings for SC7280
  clk: qcom: gcc-sm8350: add gdsc
  dt-bindings: clock: Add QCOM SDM630 and SDM660 graphics clock bindings
  clk: qcom: Add SDM660 GPU Clock Controller (GPUCC) driver
  clk: qcom: mmcc-msm8996: Migrate gfx3d clock to clk_rcg2_gfx3d
  clk: qcom: rcg2: Stop hardcoding gfx3d pingpong parent numbers
  dt-bindings: clock: Add support for the SDM630 and SDM660 mmcc
  clk: qcom: Add SDM660 Multimedia Clock Controller (MMCC) driver
  clk: qcom: gcc-sdm660: Mark GPU CFG AHB clock as critical
  clk: qcom: gcc-sdm660: Mark MMSS NoC CFG AHB clock as critical
  clk: qcom: gpucc-msm8998: Allow fabia gpupll0 rate setting
  clk: qcom: gpucc-msm8998: Add resets, cxc, fix flags on gpu_gx_gdsc
  clk: qcom: gdsc: Implement NO_RET_PERIPH flag
  clk: mstar: MStar/SigmaStar MPLL driver
  ...

1 files changed, 270 insertions, 0 deletions

diff --git a/drivers/clk/renesas/rcar-cpg-lib.c b/drivers/clk/renesas/rcar-cpg-lib.c
new file mode 100644
index 000000000000..7e7e5d1341d5
--- /dev/null
+++ b/drivers/clk/renesas/rcar-cpg-lib.c
@@ -0,0 +1,270 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * R-Car Gen3 Clock Pulse Generator Library
+ *
+ * Copyright (C) 2015-2018 Glider bvba
+ * Copyright (C) 2019 Renesas Electronics Corp.
+ *
+ * Based on clk-rcar-gen3.c
+ *
+ * Copyright (C) 2015 Renesas Electronics Corp.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/pm.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+
+#include "rcar-cpg-lib.h"
+
+spinlock_t cpg_lock;
+
+void cpg_reg_modify(void __iomem *reg, u32 clear, u32 set)
+{
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&cpg_lock, flags);
+	val = readl(reg);
+	val &= ~clear;
+	val |= set;
+	writel(val, reg);
+	spin_unlock_irqrestore(&cpg_lock, flags);
+};
+
+static int cpg_simple_notifier_call(struct notifier_block *nb,
+				    unsigned long action, void *data)
+{
+	struct cpg_simple_notifier *csn =
+		container_of(nb, struct cpg_simple_notifier, nb);
+
+	switch (action) {
+	case PM_EVENT_SUSPEND:
+		csn->saved = readl(csn->reg);
+		return NOTIFY_OK;
+
+	case PM_EVENT_RESUME:
+		writel(csn->saved, csn->reg);
+		return NOTIFY_OK;
+	}
+	return NOTIFY_DONE;
+}
+
+void cpg_simple_notifier_register(struct raw_notifier_head *notifiers,
+				  struct cpg_simple_notifier *csn)
+{
+	csn->nb.notifier_call = cpg_simple_notifier_call;
+	raw_notifier_chain_register(notifiers, &csn->nb);
+}
+
+/*
+ * SDn Clock
+ */
+#define CPG_SD_STP_HCK		BIT(9)
+#define CPG_SD_STP_CK		BIT(8)
+
+#define CPG_SD_STP_MASK		(CPG_SD_STP_HCK | CPG_SD_STP_CK)
+#define CPG_SD_FC_MASK		(0x7 << 2 | 0x3 << 0)
+
+#define CPG_SD_DIV_TABLE_DATA(stp_hck, sd_srcfc, sd_fc, sd_div) \
+{ \
+	.val = ((stp_hck) ? CPG_SD_STP_HCK : 0) | \
+	       ((sd_srcfc) << 2) | \
+	       ((sd_fc) << 0), \
+	.div = (sd_div), \
+}
+
+struct sd_div_table {
+	u32 val;
+	unsigned int div;
+};
+
+struct sd_clock {
+	struct clk_hw hw;
+	const struct sd_div_table *div_table;
+	struct cpg_simple_notifier csn;
+	unsigned int div_num;
+	unsigned int cur_div_idx;
+};
+
+/* SDn divider
+ *           sd_srcfc   sd_fc   div
+ * stp_hck   (div)      (div)     = sd_srcfc x sd_fc
+ *---------------------------------------------------------
+ *  0         0 (1)      1 (4)      4 : SDR104 / HS200 / HS400 (8 TAP)
+ *  0         1 (2)      1 (4)      8 : SDR50
+ *  1         2 (4)      1 (4)     16 : HS / SDR25
+ *  1         3 (8)      1 (4)     32 : NS / SDR12
+ *  1         4 (16)     1 (4)     64
+ *  0         0 (1)      0 (2)      2
+ *  0         1 (2)      0 (2)      4 : SDR104 / HS200 / HS400 (4 TAP)
+ *  1         2 (4)      0 (2)      8
+ *  1         3 (8)      0 (2)     16
+ *  1         4 (16)     0 (2)     32
+ *
+ *  NOTE: There is a quirk option to ignore the first row of the dividers
+ *  table when searching for suitable settings. This is because HS400 on
+ *  early ES versions of H3 and M3-W requires a specific setting to work.
+ */
+static const struct sd_div_table cpg_sd_div_table[] = {
+/*	CPG_SD_DIV_TABLE_DATA(stp_hck,  sd_srcfc,   sd_fc,  sd_div) */
+	CPG_SD_DIV_TABLE_DATA(0,        0,          1,        4),
+	CPG_SD_DIV_TABLE_DATA(0,        1,          1,        8),
+	CPG_SD_DIV_TABLE_DATA(1,        2,          1,       16),
+	CPG_SD_DIV_TABLE_DATA(1,        3,          1,       32),
+	CPG_SD_DIV_TABLE_DATA(1,        4,          1,       64),
+	CPG_SD_DIV_TABLE_DATA(0,        0,          0,        2),
+	CPG_SD_DIV_TABLE_DATA(0,        1,          0,        4),
+	CPG_SD_DIV_TABLE_DATA(1,        2,          0,        8),
+	CPG_SD_DIV_TABLE_DATA(1,        3,          0,       16),
+	CPG_SD_DIV_TABLE_DATA(1,        4,          0,       32),
+};
+
+#define to_sd_clock(_hw) container_of(_hw, struct sd_clock, hw)
+
+static int cpg_sd_clock_enable(struct clk_hw *hw)
+{
+	struct sd_clock *clock = to_sd_clock(hw);
+
+	cpg_reg_modify(clock->csn.reg, CPG_SD_STP_MASK,
+		       clock->div_table[clock->cur_div_idx].val &
+		       CPG_SD_STP_MASK);
+
+	return 0;
+}
+
+static void cpg_sd_clock_disable(struct clk_hw *hw)
+{
+	struct sd_clock *clock = to_sd_clock(hw);
+
+	cpg_reg_modify(clock->csn.reg, 0, CPG_SD_STP_MASK);
+}
+
+static int cpg_sd_clock_is_enabled(struct clk_hw *hw)
+{
+	struct sd_clock *clock = to_sd_clock(hw);
+
+	return !(readl(clock->csn.reg) & CPG_SD_STP_MASK);
+}
+
+static unsigned long cpg_sd_clock_recalc_rate(struct clk_hw *hw,
+						unsigned long parent_rate)
+{
+	struct sd_clock *clock = to_sd_clock(hw);
+
+	return DIV_ROUND_CLOSEST(parent_rate,
+				 clock->div_table[clock->cur_div_idx].div);
+}
+
+static int cpg_sd_clock_determine_rate(struct clk_hw *hw,
+				       struct clk_rate_request *req)
+{
+	unsigned long best_rate = ULONG_MAX, diff_min = ULONG_MAX;
+	struct sd_clock *clock = to_sd_clock(hw);
+	unsigned long calc_rate, diff;
+	unsigned int i;
+
+	for (i = 0; i < clock->div_num; i++) {
+		calc_rate = DIV_ROUND_CLOSEST(req->best_parent_rate,
+					      clock->div_table[i].div);
+		if (calc_rate < req->min_rate || calc_rate > req->max_rate)
+			continue;
+
+		diff = calc_rate > req->rate ? calc_rate - req->rate
+					     : req->rate - calc_rate;
+		if (diff < diff_min) {
+			best_rate = calc_rate;
+			diff_min = diff;
+		}
+	}
+
+	if (best_rate == ULONG_MAX)
+		return -EINVAL;
+
+	req->rate = best_rate;
+	return 0;
+}
+
+static int cpg_sd_clock_set_rate(struct clk_hw *hw, unsigned long rate,
+				 unsigned long parent_rate)
+{
+	struct sd_clock *clock = to_sd_clock(hw);
+	unsigned int i;
+
+	for (i = 0; i < clock->div_num; i++)
+		if (rate == DIV_ROUND_CLOSEST(parent_rate,
+					      clock->div_table[i].div))
+			break;
+
+	if (i >= clock->div_num)
+		return -EINVAL;
+
+	clock->cur_div_idx = i;
+
+	cpg_reg_modify(clock->csn.reg, CPG_SD_STP_MASK | CPG_SD_FC_MASK,
+		       clock->div_table[i].val &
+		       (CPG_SD_STP_MASK | CPG_SD_FC_MASK));
+
+	return 0;
+}
+
+static const struct clk_ops cpg_sd_clock_ops = {
+	.enable = cpg_sd_clock_enable,
+	.disable = cpg_sd_clock_disable,
+	.is_enabled = cpg_sd_clock_is_enabled,
+	.recalc_rate = cpg_sd_clock_recalc_rate,
+	.determine_rate = cpg_sd_clock_determine_rate,
+	.set_rate = cpg_sd_clock_set_rate,
+};
+
+struct clk * __init cpg_sd_clk_register(const char *name,
+	void __iomem *base, unsigned int offset, const char *parent_name,
+	struct raw_notifier_head *notifiers, bool skip_first)
+{
+	struct clk_init_data init;
+	struct sd_clock *clock;
+	struct clk *clk;
+	u32 val;
+
+	clock = kzalloc(sizeof(*clock), GFP_KERNEL);
+	if (!clock)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	init.ops = &cpg_sd_clock_ops;
+	init.flags = CLK_SET_RATE_PARENT;
+	init.parent_names = &parent_name;
+	init.num_parents = 1;
+
+	clock->csn.reg = base + offset;
+	clock->hw.init = &init;
+	clock->div_table = cpg_sd_div_table;
+	clock->div_num = ARRAY_SIZE(cpg_sd_div_table);
+
+	if (skip_first) {
+		clock->div_table++;
+		clock->div_num--;
+	}
+
+	val = readl(clock->csn.reg) & ~CPG_SD_FC_MASK;
+	val |= CPG_SD_STP_MASK | (clock->div_table[0].val & CPG_SD_FC_MASK);
+	writel(val, clock->csn.reg);
+
+	clk = clk_register(NULL, &clock->hw);
+	if (IS_ERR(clk))
+		goto free_clock;
+
+	cpg_simple_notifier_register(notifiers, &clock->csn);
+	return clk;
+
+free_clock:
+	kfree(clock);
+	return clk;
+}
+
+