Merge tag 'renesas-clk-for-v5.16-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into clk-renesas

Pull Renesas clk driver updates from Geert Uytterhoeven:

 - Add TPU (PWM), and Z (Cortex-A76) clocks on Renesas R-Car V3U
 - Add Ethernet clocks on Renesas RZ/G2L

* tag 'renesas-clk-for-v5.16-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers:
  clk: renesas: r8a779a0: Add Z0 and Z1 clock support
  clk: renesas: r9a07g044: Add GbEthernet clock/reset
  clk: renesas: rzg2l: Add support to handle coupled clocks
  clk: renesas: r9a07g044: Add ethernet clock sources
  clk: renesas: rzg2l: Add support to handle MUX clocks
  clk: renesas: r8a779a0: Add TPU clock
  clk: renesas: rzg2l: Fix clk status function
  clk: renesas: r9a07g044: Mark IA55_CLK and DMAC_ACLK critical

Author: bebarino

drivers/clk/renesas/r8a779a0-cpg-mssr.c

@@ -33,6 +33,7 @@ enum rcar_r8a779a0_clk_types {
 	CLK_TYPE_R8A779A0_PLL1,
 	CLK_TYPE_R8A779A0_PLL2X_3X,	/* PLL[23][01] */
 	CLK_TYPE_R8A779A0_PLL5,
+	CLK_TYPE_R8A779A0_Z,
 	CLK_TYPE_R8A779A0_SD,
 	CLK_TYPE_R8A779A0_MDSEL,	/* Select parent/divider using mode pin */
 	CLK_TYPE_R8A779A0_OSC,	/* OSC EXTAL predivider and fixed divider */
@@ -84,6 +85,10 @@ enum clk_ids {
 	DEF_BASE(_name, _id, CLK_TYPE_R8A779A0_PLL2X_3X, CLK_MAIN, \
 		 .offset = _offset)
 
+#define DEF_Z(_name, _id, _parent, _div, _offset)	\
+	DEF_BASE(_name, _id, CLK_TYPE_R8A779A0_Z, _parent, .div = _div,	\
+		 .offset = _offset)
+
 #define DEF_SD(_name, _id, _parent, _offset)   \
 	DEF_BASE(_name, _id, CLK_TYPE_R8A779A0_SD, _parent, .offset = _offset)
 
@@ -122,6 +127,8 @@ static const struct cpg_core_clk r8a779a0_core_clks[] __initconst = {
 	DEF_RATE(".oco",		CLK_OCO,	32768),
 
 	/* Core Clock Outputs */
+	DEF_Z("z0",		R8A779A0_CLK_Z0,	CLK_PLL20,	2, 0),
+	DEF_Z("z1",		R8A779A0_CLK_Z1,	CLK_PLL21,	2, 8),
 	DEF_FIXED("zx",		R8A779A0_CLK_ZX,	CLK_PLL20_DIV2,	2, 1),
 	DEF_FIXED("s1d1",	R8A779A0_CLK_S1D1,	CLK_S1,		1, 1),
 	DEF_FIXED("s1d2",	R8A779A0_CLK_S1D2,	CLK_S1,		2, 1),
@@ -205,6 +212,7 @@ static const struct mssr_mod_clk r8a779a0_mod_clks[] __initconst = {
 	DEF_MOD("tmu2",		715,	R8A779A0_CLK_S1D4),
 	DEF_MOD("tmu3",		716,	R8A779A0_CLK_S1D4),
 	DEF_MOD("tmu4",		717,	R8A779A0_CLK_S1D4),
+	DEF_MOD("tpu0",		718,	R8A779A0_CLK_S1D8),
 	DEF_MOD("vin00",	730,	R8A779A0_CLK_S1D1),
 	DEF_MOD("vin01",	731,	R8A779A0_CLK_S1D1),
 	DEF_MOD("vin02",	800,	R8A779A0_CLK_S1D1),
@@ -259,6 +267,153 @@ static const struct rcar_r8a779a0_cpg_pll_config *cpg_pll_config __initdata;
 static unsigned int cpg_clk_extalr __initdata;
 static u32 cpg_mode __initdata;
 
+/*
+ * Z0 Clock & Z1 Clock
+ */
+#define CPG_FRQCRB			0x00000804
+#define CPG_FRQCRB_KICK			BIT(31)
+#define CPG_FRQCRC			0x00000808
+
+struct cpg_z_clk {
+	struct clk_hw hw;
+	void __iomem *reg;
+	void __iomem *kick_reg;
+	unsigned long max_rate;		/* Maximum rate for normal mode */
+	unsigned int fixed_div;
+	u32 mask;
+};
+
+#define to_z_clk(_hw)	container_of(_hw, struct cpg_z_clk, hw)
+
+static unsigned long cpg_z_clk_recalc_rate(struct clk_hw *hw,
+					   unsigned long parent_rate)
+{
+	struct cpg_z_clk *zclk = to_z_clk(hw);
+	unsigned int mult;
+	u32 val;
+
+	val = readl(zclk->reg) & zclk->mask;
+	mult = 32 - (val >> __ffs(zclk->mask));
+
+	return DIV_ROUND_CLOSEST_ULL((u64)parent_rate * mult,
+				     32 * zclk->fixed_div);
+}
+
+static int cpg_z_clk_determine_rate(struct clk_hw *hw,
+				    struct clk_rate_request *req)
+{
+	struct cpg_z_clk *zclk = to_z_clk(hw);
+	unsigned int min_mult, max_mult, mult;
+	unsigned long rate, prate;
+
+	rate = min(req->rate, req->max_rate);
+	if (rate <= zclk->max_rate) {
+		/* Set parent rate to initial value for normal modes */
+		prate = zclk->max_rate;
+	} else {
+		/* Set increased parent rate for boost modes */
+		prate = rate;
+	}
+	req->best_parent_rate = clk_hw_round_rate(clk_hw_get_parent(hw),
+						  prate * zclk->fixed_div);
+
+	prate = req->best_parent_rate / zclk->fixed_div;
+	min_mult = max(div64_ul(req->min_rate * 32ULL, prate), 1ULL);
+	max_mult = min(div64_ul(req->max_rate * 32ULL, prate), 32ULL);
+	if (max_mult < min_mult)
+		return -EINVAL;
+
+	mult = DIV_ROUND_CLOSEST_ULL(rate * 32ULL, prate);
+	mult = clamp(mult, min_mult, max_mult);
+
+	req->rate = DIV_ROUND_CLOSEST_ULL((u64)prate * mult, 32);
+	return 0;
+}
+
+static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+			      unsigned long parent_rate)
+{
+	struct cpg_z_clk *zclk = to_z_clk(hw);
+	unsigned int mult;
+	unsigned int i;
+
+	mult = DIV64_U64_ROUND_CLOSEST(rate * 32ULL * zclk->fixed_div,
+				       parent_rate);
+	mult = clamp(mult, 1U, 32U);
+
+	if (readl(zclk->kick_reg) & CPG_FRQCRB_KICK)
+		return -EBUSY;
+
+	cpg_reg_modify(zclk->reg, zclk->mask, (32 - mult) << __ffs(zclk->mask));
+
+	/*
+	 * Set KICK bit in FRQCRB to update hardware setting and wait for
+	 * clock change completion.
+	 */
+	cpg_reg_modify(zclk->kick_reg, 0, CPG_FRQCRB_KICK);
+
+	/*
+	 * Note: There is no HW information about the worst case latency.
+	 *
+	 * Using experimental measurements, it seems that no more than
+	 * ~10 iterations are needed, independently of the CPU rate.
+	 * Since this value might be dependent on external xtal rate, pll1
+	 * rate or even the other emulation clocks rate, use 1000 as a
+	 * "super" safe value.
+	 */
+	for (i = 1000; i; i--) {
+		if (!(readl(zclk->kick_reg) & CPG_FRQCRB_KICK))
+			return 0;
+
+		cpu_relax();
+	}
+
+	return -ETIMEDOUT;
+}
+
+static const struct clk_ops cpg_z_clk_ops = {
+	.recalc_rate = cpg_z_clk_recalc_rate,
+	.determine_rate = cpg_z_clk_determine_rate,
+	.set_rate = cpg_z_clk_set_rate,
+};
+
+static struct clk * __init cpg_z_clk_register(const char *name,
+					      const char *parent_name,
+					      void __iomem *reg,
+					      unsigned int div,
+					      unsigned int offset)
+{
+	struct clk_init_data init = {};
+	struct cpg_z_clk *zclk;
+	struct clk *clk;
+
+	zclk = kzalloc(sizeof(*zclk), GFP_KERNEL);
+	if (!zclk)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	init.ops = &cpg_z_clk_ops;
+	init.flags = CLK_SET_RATE_PARENT;
+	init.parent_names = &parent_name;
+	init.num_parents = 1;
+
+	zclk->reg = reg + CPG_FRQCRC;
+	zclk->kick_reg = reg + CPG_FRQCRB;
+	zclk->hw.init = &init;
+	zclk->mask = GENMASK(offset + 4, offset);
+	zclk->fixed_div = div; /* PLLVCO x 1/div x SYS-CPU divider */
+
+	clk = clk_register(NULL, &zclk->hw);
+	if (IS_ERR(clk)) {
+		kfree(zclk);
+		return clk;
+	}
+
+	zclk->max_rate = clk_hw_get_rate(clk_hw_get_parent(&zclk->hw)) /
+			 zclk->fixed_div;
+	return clk;
+}
+
 static struct clk * __init rcar_r8a779a0_cpg_clk_register(struct device *dev,
 	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
 	struct clk **clks, void __iomem *base,
@@ -293,6 +448,10 @@ static struct clk * __init rcar_r8a779a0_cpg_clk_register(struct device *dev,
 		div = cpg_pll_config->pll5_div;
 		break;
 
+	case CLK_TYPE_R8A779A0_Z:
+		return cpg_z_clk_register(core->name, __clk_get_name(parent),
+					  base, core->div, core->offset);
+
 	case CLK_TYPE_R8A779A0_SD:
 		return cpg_sd_clk_register(core->name, base, core->offset,
 					   __clk_get_name(parent), notifiers,

drivers/clk/renesas/r9a07g044-cpg.c

@@ -35,8 +35,10 @@ enum clk_ids {
 	CLK_PLL3_DIV4,
 	CLK_PLL4,
 	CLK_PLL5,
-	CLK_PLL5_DIV2,
+	CLK_PLL5_FOUT3,
+	CLK_PLL5_250,
 	CLK_PLL6,
+	CLK_PLL6_250,
 	CLK_P1_DIV2,
 
 	/* Module Clocks */
@@ -53,6 +55,9 @@ static const struct clk_div_table dtable_1_32[] = {
 	{0, 0},
 };
 
+/* Mux clock tables */
+static const char * const sel_pll6_2[]	= { ".pll6_250", ".pll5_250" };
+
 static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
 	/* External Clock Inputs */
 	DEF_INPUT("extal", CLK_EXTAL),
@@ -64,6 +69,11 @@ static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
 	DEF_FIXED(".pll2", CLK_PLL2, CLK_EXTAL, 133, 2),
 	DEF_FIXED(".pll3", CLK_PLL3, CLK_EXTAL, 133, 2),
 
+	DEF_FIXED(".pll5", CLK_PLL5, CLK_EXTAL, 125, 1),
+	DEF_FIXED(".pll5_fout3", CLK_PLL5_FOUT3, CLK_PLL5, 1, 6),
+
+	DEF_FIXED(".pll6", CLK_PLL6, CLK_EXTAL, 125, 6),
+
 	DEF_FIXED(".pll2_div2", CLK_PLL2_DIV2, CLK_PLL2, 1, 2),
 	DEF_FIXED(".pll2_div16", CLK_PLL2_DIV16, CLK_PLL2, 1, 16),
 	DEF_FIXED(".pll2_div20", CLK_PLL2_DIV20, CLK_PLL2, 1, 20),
@@ -73,6 +83,9 @@ static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
 	DEF_FIXED(".pll3_div2_4_2", CLK_PLL3_DIV2_4_2, CLK_PLL3_DIV2_4, 1, 2),
 	DEF_FIXED(".pll3_div4", CLK_PLL3_DIV4, CLK_PLL3, 1, 4),
 
+	DEF_FIXED(".pll5_250", CLK_PLL5_250, CLK_PLL5_FOUT3, 1, 2),
+	DEF_FIXED(".pll6_250", CLK_PLL6_250, CLK_PLL6, 1, 2),
+
 	/* Core output clk */
 	DEF_FIXED("I", R9A07G044_CLK_I, CLK_PLL1, 1, 1),
 	DEF_DIV("P0", R9A07G044_CLK_P0, CLK_PLL2_DIV16, DIVPL2A,
@@ -84,6 +97,10 @@ static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
 	DEF_FIXED("P1_DIV2", CLK_P1_DIV2, R9A07G044_CLK_P1, 1, 2),
 	DEF_DIV("P2", R9A07G044_CLK_P2, CLK_PLL3_DIV2_4_2,
 		DIVPL3A, dtable_1_32, CLK_DIVIDER_HIWORD_MASK),
+	DEF_FIXED("M0", R9A07G044_CLK_M0, CLK_PLL3_DIV2_4, 1, 1),
+	DEF_FIXED("ZT", R9A07G044_CLK_ZT, CLK_PLL3_DIV2_4_2, 1, 1),
+	DEF_MUX("HP", R9A07G044_CLK_HP, SEL_PLL6_2,
+		sel_pll6_2, ARRAY_SIZE(sel_pll6_2), 0, CLK_MUX_HIWORD_MASK),
 };
 
 static struct rzg2l_mod_clk r9a07g044_mod_clks[] = {
@@ -121,6 +138,14 @@ static struct rzg2l_mod_clk r9a07g044_mod_clks[] = {
 				0x578, 2),
 	DEF_MOD("usb_pclk",	R9A07G044_USB_PCLK, R9A07G044_CLK_P1,
 				0x578, 3),
+	DEF_COUPLED("eth0_axi",	R9A07G044_ETH0_CLK_AXI, R9A07G044_CLK_M0,
+				0x57c, 0),
+	DEF_COUPLED("eth0_chi",	R9A07G044_ETH0_CLK_CHI, R9A07G044_CLK_ZT,
+				0x57c, 0),
+	DEF_COUPLED("eth1_axi",	R9A07G044_ETH1_CLK_AXI, R9A07G044_CLK_M0,
+				0x57c, 1),
+	DEF_COUPLED("eth1_chi",	R9A07G044_ETH1_CLK_CHI, R9A07G044_CLK_ZT,
+				0x57c, 1),
 	DEF_MOD("i2c0",		R9A07G044_I2C0_PCLK, R9A07G044_CLK_P0,
 				0x580, 0),
 	DEF_MOD("i2c1",		R9A07G044_I2C1_PCLK, R9A07G044_CLK_P0,
@@ -165,6 +190,8 @@ static struct rzg2l_reset r9a07g044_resets[] = {
 	DEF_RST(R9A07G044_USB_U2H1_HRESETN, 0x878, 1),
 	DEF_RST(R9A07G044_USB_U2P_EXL_SYSRST, 0x878, 2),
 	DEF_RST(R9A07G044_USB_PRESETN, 0x878, 3),
+	DEF_RST(R9A07G044_ETH0_RST_HW_N, 0x87c, 0),
+	DEF_RST(R9A07G044_ETH1_RST_HW_N, 0x87c, 1),
 	DEF_RST(R9A07G044_I2C0_MRST, 0x880, 0),
 	DEF_RST(R9A07G044_I2C1_MRST, 0x880, 1),
 	DEF_RST(R9A07G044_I2C2_MRST, 0x880, 2),
@@ -186,6 +213,8 @@ static struct rzg2l_reset r9a07g044_resets[] = {
 
 static const unsigned int r9a07g044_crit_mod_clks[] __initconst = {
 	MOD_CLK_BASE + R9A07G044_GIC600_GICCLK,
+	MOD_CLK_BASE + R9A07G044_IA55_CLK,
+	MOD_CLK_BASE + R9A07G044_DMAC_ACLK,
 };
 
 const struct rzg2l_cpg_info r9a07g044_cpg_info = {