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-rw-r--r--drivers/clk/renesas/Kconfig9
-rw-r--r--drivers/clk/renesas/Makefile2
-rw-r--r--drivers/clk/renesas/clk-div6.c80
-rw-r--r--drivers/clk/renesas/r8a77995-cpg-mssr.c1
-rw-r--r--drivers/clk/renesas/r8a779a0-cpg-mssr.c4
-rw-r--r--drivers/clk/renesas/r9a06g032-clocks.c25
-rw-r--r--drivers/clk/renesas/r9a07g044-cpg.c127
-rw-r--r--drivers/clk/renesas/rcar-gen3-cpg.c183
-rw-r--r--drivers/clk/renesas/rcar-usb2-clock-sel.c24
-rw-r--r--drivers/clk/renesas/renesas-cpg-mssr.c10
-rw-r--r--drivers/clk/renesas/renesas-rzg2l-cpg.c750
-rw-r--r--drivers/clk/renesas/renesas-rzg2l-cpg.h136
12 files changed, 1268 insertions, 83 deletions
diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig
index 607e64a17d72..7b450650bcae 100644
--- a/drivers/clk/renesas/Kconfig
+++ b/drivers/clk/renesas/Kconfig
@@ -32,6 +32,7 @@ config CLK_RENESAS
select CLK_R8A77995 if ARCH_R8A77995
select CLK_R8A779A0 if ARCH_R8A779A0
select CLK_R9A06G032 if ARCH_R9A06G032
+ select CLK_R9A07G044 if ARCH_R9A07G044
select CLK_SH73A0 if ARCH_SH73A0
if CLK_RENESAS
@@ -156,6 +157,10 @@ config CLK_R9A06G032
help
This is a driver for R9A06G032 clocks
+config CLK_R9A07G044
+ bool "RZ/G2L clock support" if COMPILE_TEST
+ select CLK_RZG2L
+
config CLK_SH73A0
bool "SH-Mobile AG5 clock support" if COMPILE_TEST
select CLK_RENESAS_CPG_MSTP
@@ -182,6 +187,10 @@ config CLK_RCAR_USB2_CLOCK_SEL
help
This is a driver for R-Car USB2 clock selector
+config CLK_RZG2L
+ bool "Renesas RZ/G2L family clock support" if COMPILE_TEST
+ select RESET_CONTROLLER
+
# Generic
config CLK_RENESAS_CPG_MSSR
bool "CPG/MSSR clock support" if COMPILE_TEST
diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index ef0d2bba92bf..5c6c5c721d98 100644
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_CLK_R8A77990) += r8a77990-cpg-mssr.o
obj-$(CONFIG_CLK_R8A77995) += r8a77995-cpg-mssr.o
obj-$(CONFIG_CLK_R8A779A0) += r8a779a0-cpg-mssr.o
obj-$(CONFIG_CLK_R9A06G032) += r9a06g032-clocks.o
+obj-$(CONFIG_CLK_R9A07G044) += r9a07g044-cpg.o
obj-$(CONFIG_CLK_SH73A0) += clk-sh73a0.o
# Family
@@ -36,6 +37,7 @@ obj-$(CONFIG_CLK_RCAR_CPG_LIB) += rcar-cpg-lib.o
obj-$(CONFIG_CLK_RCAR_GEN2_CPG) += rcar-gen2-cpg.o
obj-$(CONFIG_CLK_RCAR_GEN3_CPG) += rcar-gen3-cpg.o
obj-$(CONFIG_CLK_RCAR_USB2_CLOCK_SEL) += rcar-usb2-clock-sel.o
+obj-$(CONFIG_CLK_RZG2L) += renesas-rzg2l-cpg.o
# Generic
obj-$(CONFIG_CLK_RENESAS_CPG_MSSR) += renesas-cpg-mssr.o
diff --git a/drivers/clk/renesas/clk-div6.c b/drivers/clk/renesas/clk-div6.c
index 8fb68e703a6b..3abd6e5400ad 100644
--- a/drivers/clk/renesas/clk-div6.c
+++ b/drivers/clk/renesas/clk-div6.c
@@ -28,8 +28,7 @@
* @hw: handle between common and hardware-specific interfaces
* @reg: IO-remapped register
* @div: divisor value (1-64)
- * @src_shift: Shift to access the register bits to select the parent clock
- * @src_width: Number of register bits to select the parent clock (may be 0)
+ * @src_mask: Bitmask covering the register bits to select the parent clock
* @nb: Notifier block to save/restore clock state for system resume
* @parents: Array to map from valid parent clocks indices to hardware indices
*/
@@ -37,8 +36,7 @@ struct div6_clock {
struct clk_hw hw;
void __iomem *reg;
unsigned int div;
- u32 src_shift;
- u32 src_width;
+ u32 src_mask;
struct notifier_block nb;
u8 parents[];
};
@@ -99,15 +97,52 @@ static unsigned int cpg_div6_clock_calc_div(unsigned long rate,
rate = 1;
div = DIV_ROUND_CLOSEST(parent_rate, rate);
- return clamp_t(unsigned int, div, 1, 64);
+ return clamp(div, 1U, 64U);
}
-static long cpg_div6_clock_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static int cpg_div6_clock_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
{
- unsigned int div = cpg_div6_clock_calc_div(rate, *parent_rate);
+ unsigned long prate, calc_rate, diff, best_rate, best_prate;
+ unsigned int num_parents = clk_hw_get_num_parents(hw);
+ struct clk_hw *parent, *best_parent = NULL;
+ unsigned int i, min_div, max_div, div;
+ unsigned long min_diff = ULONG_MAX;
+
+ for (i = 0; i < num_parents; i++) {
+ parent = clk_hw_get_parent_by_index(hw, i);
+ if (!parent)
+ continue;
+
+ prate = clk_hw_get_rate(parent);
+ if (!prate)
+ continue;
+
+ min_div = max(DIV_ROUND_UP(prate, req->max_rate), 1UL);
+ max_div = req->min_rate ? min(prate / req->min_rate, 64UL) : 64;
+ if (max_div < min_div)
+ continue;
+
+ div = cpg_div6_clock_calc_div(req->rate, prate);
+ div = clamp(div, min_div, max_div);
+ calc_rate = prate / div;
+ diff = calc_rate > req->rate ? calc_rate - req->rate
+ : req->rate - calc_rate;
+ if (diff < min_diff) {
+ best_rate = calc_rate;
+ best_parent = parent;
+ best_prate = prate;
+ min_diff = diff;
+ }
+ }
+
+ if (!best_parent)
+ return -EINVAL;
- return *parent_rate / div;
+ req->best_parent_rate = best_prate;
+ req->best_parent_hw = best_parent;
+ req->rate = best_rate;
+ return 0;
}
static int cpg_div6_clock_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -133,11 +168,11 @@ static u8 cpg_div6_clock_get_parent(struct clk_hw *hw)
unsigned int i;
u8 hw_index;
- if (clock->src_width == 0)
+ if (clock->src_mask == 0)
return 0;
- hw_index = (readl(clock->reg) >> clock->src_shift) &
- (BIT(clock->src_width) - 1);
+ hw_index = (readl(clock->reg) & clock->src_mask) >>
+ __ffs(clock->src_mask);
for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
if (clock->parents[i] == hw_index)
return i;
@@ -151,18 +186,13 @@ static u8 cpg_div6_clock_get_parent(struct clk_hw *hw)
static int cpg_div6_clock_set_parent(struct clk_hw *hw, u8 index)
{
struct div6_clock *clock = to_div6_clock(hw);
- u8 hw_index;
- u32 mask;
+ u32 src;
if (index >= clk_hw_get_num_parents(hw))
return -EINVAL;
- mask = ~((BIT(clock->src_width) - 1) << clock->src_shift);
- hw_index = clock->parents[index];
-
- writel((readl(clock->reg) & mask) | (hw_index << clock->src_shift),
- clock->reg);
-
+ src = clock->parents[index] << __ffs(clock->src_mask);
+ writel((readl(clock->reg) & ~clock->src_mask) | src, clock->reg);
return 0;
}
@@ -173,7 +203,7 @@ static const struct clk_ops cpg_div6_clock_ops = {
.get_parent = cpg_div6_clock_get_parent,
.set_parent = cpg_div6_clock_set_parent,
.recalc_rate = cpg_div6_clock_recalc_rate,
- .round_rate = cpg_div6_clock_round_rate,
+ .determine_rate = cpg_div6_clock_determine_rate,
.set_rate = cpg_div6_clock_set_rate,
};
@@ -236,17 +266,15 @@ struct clk * __init cpg_div6_register(const char *name,
switch (num_parents) {
case 1:
/* fixed parent clock */
- clock->src_shift = clock->src_width = 0;
+ clock->src_mask = 0;
break;
case 4:
/* clock with EXSRC bits 6-7 */
- clock->src_shift = 6;
- clock->src_width = 2;
+ clock->src_mask = GENMASK(7, 6);
break;
case 8:
/* VCLK with EXSRC bits 12-14 */
- clock->src_shift = 12;
- clock->src_width = 3;
+ clock->src_mask = GENMASK(14, 12);
break;
default:
pr_err("%s: invalid number of parents for DIV6 clock %s\n",
diff --git a/drivers/clk/renesas/r8a77995-cpg-mssr.c b/drivers/clk/renesas/r8a77995-cpg-mssr.c
index 9cfd00cf4e69..81c0bc1e78af 100644
--- a/drivers/clk/renesas/r8a77995-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a77995-cpg-mssr.c
@@ -75,6 +75,7 @@ static const struct cpg_core_clk r8a77995_core_clks[] __initconst = {
DEF_RATE(".oco", CLK_OCO, 8 * 1000 * 1000),
/* Core Clock Outputs */
+ DEF_FIXED("za2", R8A77995_CLK_ZA2, CLK_PLL0D3, 2, 1),
DEF_FIXED("z2", R8A77995_CLK_Z2, CLK_PLL0D3, 1, 1),
DEF_FIXED("ztr", R8A77995_CLK_ZTR, CLK_PLL1, 6, 1),
DEF_FIXED("zt", R8A77995_CLK_ZT, CLK_PLL1, 4, 1),
diff --git a/drivers/clk/renesas/r8a779a0-cpg-mssr.c b/drivers/clk/renesas/r8a779a0-cpg-mssr.c
index 867c565cb58f..acaf5a93f1d3 100644
--- a/drivers/clk/renesas/r8a779a0-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a779a0-cpg-mssr.c
@@ -180,6 +180,10 @@ static const struct mssr_mod_clk r8a779a0_mod_clks[] __initconst = {
DEF_MOD("i2c4", 522, R8A779A0_CLK_S1D4),
DEF_MOD("i2c5", 523, R8A779A0_CLK_S1D4),
DEF_MOD("i2c6", 524, R8A779A0_CLK_S1D4),
+ DEF_MOD("ispcs0", 612, R8A779A0_CLK_S1D1),
+ DEF_MOD("ispcs1", 613, R8A779A0_CLK_S1D1),
+ DEF_MOD("ispcs2", 614, R8A779A0_CLK_S1D1),
+ DEF_MOD("ispcs3", 615, R8A779A0_CLK_S1D1),
DEF_MOD("msi0", 618, R8A779A0_CLK_MSO),
DEF_MOD("msi1", 619, R8A779A0_CLK_MSO),
DEF_MOD("msi2", 620, R8A779A0_CLK_MSO),
diff --git a/drivers/clk/renesas/r9a06g032-clocks.c b/drivers/clk/renesas/r9a06g032-clocks.c
index 71b11443f6fc..c99942f0e4d4 100644
--- a/drivers/clk/renesas/r9a06g032-clocks.c
+++ b/drivers/clk/renesas/r9a06g032-clocks.c
@@ -604,20 +604,19 @@ r9a06g032_div_clamp_div(struct r9a06g032_clk_div *clk,
return div;
}
-static long
-r9a06g032_div_round_rate(struct clk_hw *hw,
- unsigned long rate, unsigned long *prate)
+static int
+r9a06g032_div_determine_rate(struct clk_hw *hw, struct clk_rate_request *req)
{
struct r9a06g032_clk_div *clk = to_r9a06g032_div(hw);
- u32 div = DIV_ROUND_UP(*prate, rate);
+ u32 div = DIV_ROUND_UP(req->best_parent_rate, req->rate);
pr_devel("%s %pC %ld (prate %ld) (wanted div %u)\n", __func__,
- hw->clk, rate, *prate, div);
+ hw->clk, req->rate, req->best_parent_rate, div);
pr_devel(" min %d (%ld) max %d (%ld)\n",
- clk->min, DIV_ROUND_UP(*prate, clk->min),
- clk->max, DIV_ROUND_UP(*prate, clk->max));
+ clk->min, DIV_ROUND_UP(req->best_parent_rate, clk->min),
+ clk->max, DIV_ROUND_UP(req->best_parent_rate, clk->max));
- div = r9a06g032_div_clamp_div(clk, rate, *prate);
+ div = r9a06g032_div_clamp_div(clk, req->rate, req->best_parent_rate);
/*
* this is a hack. Currently the serial driver asks for a clock rate
* that is 16 times the baud rate -- and that is wildly outside the
@@ -630,11 +629,13 @@ r9a06g032_div_round_rate(struct clk_hw *hw,
if (clk->index == R9A06G032_DIV_UART ||
clk->index == R9A06G032_DIV_P2_PG) {
pr_devel("%s div uart hack!\n", __func__);
- return clk_get_rate(hw->clk);
+ req->rate = clk_get_rate(hw->clk);
+ return 0;
}
+ req->rate = DIV_ROUND_UP(req->best_parent_rate, div);
pr_devel("%s %pC %ld / %u = %ld\n", __func__, hw->clk,
- *prate, div, DIV_ROUND_UP(*prate, div));
- return DIV_ROUND_UP(*prate, div);
+ req->best_parent_rate, div, req->rate);
+ return 0;
}
static int
@@ -663,7 +664,7 @@ r9a06g032_div_set_rate(struct clk_hw *hw,
static const struct clk_ops r9a06g032_clk_div_ops = {
.recalc_rate = r9a06g032_div_recalc_rate,
- .round_rate = r9a06g032_div_round_rate,
+ .determine_rate = r9a06g032_div_determine_rate,
.set_rate = r9a06g032_div_set_rate,
};
diff --git a/drivers/clk/renesas/r9a07g044-cpg.c b/drivers/clk/renesas/r9a07g044-cpg.c
new file mode 100644
index 000000000000..50b5269586a4
--- /dev/null
+++ b/drivers/clk/renesas/r9a07g044-cpg.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * RZ/G2L CPG driver
+ *
+ * Copyright (C) 2021 Renesas Electronics Corp.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <dt-bindings/clock/r9a07g044-cpg.h>
+
+#include "renesas-rzg2l-cpg.h"
+
+enum clk_ids {
+ /* Core Clock Outputs exported to DT */
+ LAST_DT_CORE_CLK = R9A07G044_OSCCLK,
+
+ /* External Input Clocks */
+ CLK_EXTAL,
+
+ /* Internal Core Clocks */
+ CLK_OSC_DIV1000,
+ CLK_PLL1,
+ CLK_PLL2,
+ CLK_PLL2_DIV2,
+ CLK_PLL2_DIV16,
+ CLK_PLL2_DIV20,
+ CLK_PLL3,
+ CLK_PLL3_DIV2,
+ CLK_PLL3_DIV4,
+ CLK_PLL3_DIV8,
+ CLK_PLL4,
+ CLK_PLL5,
+ CLK_PLL5_DIV2,
+ CLK_PLL6,
+
+ /* Module Clocks */
+ MOD_CLK_BASE,
+};
+
+/* Divider tables */
+static const struct clk_div_table dtable_3b[] = {
+ {0, 1},
+ {1, 2},
+ {2, 4},
+ {3, 8},
+ {4, 32},
+};
+
+static const struct cpg_core_clk r9a07g044_core_clks[] __initconst = {
+ /* External Clock Inputs */
+ DEF_INPUT("extal", CLK_EXTAL),
+
+ /* Internal Core Clocks */
+ DEF_FIXED(".osc", R9A07G044_OSCCLK, CLK_EXTAL, 1, 1),
+ DEF_FIXED(".osc_div1000", CLK_OSC_DIV1000, CLK_EXTAL, 1, 1000),
+ DEF_SAMPLL(".pll1", CLK_PLL1, CLK_EXTAL, PLL146_CONF(0)),
+ DEF_FIXED(".pll2", CLK_PLL2, CLK_EXTAL, 133, 2),
+ DEF_FIXED(".pll3", CLK_PLL3, CLK_EXTAL, 133, 2),
+
+ 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),
+
+ DEF_FIXED(".pll3_div2", CLK_PLL3_DIV2, CLK_PLL3, 1, 2),
+ DEF_FIXED(".pll3_div4", CLK_PLL3_DIV4, CLK_PLL3, 1, 4),
+ DEF_FIXED(".pll3_div8", CLK_PLL3_DIV8, CLK_PLL3, 1, 8),
+
+ /* Core output clk */
+ DEF_FIXED("I", R9A07G044_CLK_I, CLK_PLL1, 1, 1),
+ DEF_DIV("P0", R9A07G044_CLK_P0, CLK_PLL2_DIV16, DIVPL2A,
+ dtable_3b, CLK_DIVIDER_HIWORD_MASK),
+ DEF_FIXED("TSU", R9A07G044_CLK_TSU, CLK_PLL2_DIV20, 1, 1),
+ DEF_DIV("P1", R9A07G044_CLK_P1, CLK_PLL3_DIV8,
+ DIVPL3B, dtable_3b, CLK_DIVIDER_HIWORD_MASK),
+};
+
+static struct rzg2l_mod_clk r9a07g044_mod_clks[] = {
+ DEF_MOD("gic", R9A07G044_CLK_GIC600,
+ R9A07G044_CLK_P1,
+ 0x514, BIT(0), (BIT(0) | BIT(1))),
+ DEF_MOD("ia55", R9A07G044_CLK_IA55,
+ R9A07G044_CLK_P1,
+ 0x518, (BIT(0) | BIT(1)), BIT(0)),
+ DEF_MOD("scif0", R9A07G044_CLK_SCIF0,
+ R9A07G044_CLK_P0,
+ 0x584, BIT(0), BIT(0)),
+ DEF_MOD("scif1", R9A07G044_CLK_SCIF1,
+ R9A07G044_CLK_P0,
+ 0x584, BIT(1), BIT(1)),
+ DEF_MOD("scif2", R9A07G044_CLK_SCIF2,
+ R9A07G044_CLK_P0,
+ 0x584, BIT(2), BIT(2)),
+ DEF_MOD("scif3", R9A07G044_CLK_SCIF3,
+ R9A07G044_CLK_P0,
+ 0x584, BIT(3), BIT(3)),
+ DEF_MOD("scif4", R9A07G044_CLK_SCIF4,
+ R9A07G044_CLK_P0,
+ 0x584, BIT(4), BIT(4)),
+ DEF_MOD("sci0", R9A07G044_CLK_SCI0,
+ R9A07G044_CLK_P0,
+ 0x588, BIT(0), BIT(0)),
+};
+
+static const unsigned int r9a07g044_crit_mod_clks[] __initconst = {
+ MOD_CLK_BASE + R9A07G044_CLK_GIC600,
+};
+
+const struct rzg2l_cpg_info r9a07g044_cpg_info = {
+ /* Core Clocks */
+ .core_clks = r9a07g044_core_clks,
+ .num_core_clks = ARRAY_SIZE(r9a07g044_core_clks),
+ .last_dt_core_clk = LAST_DT_CORE_CLK,
+ .num_total_core_clks = MOD_CLK_BASE,
+
+ /* Critical Module Clocks */
+ .crit_mod_clks = r9a07g044_crit_mod_clks,
+ .num_crit_mod_clks = ARRAY_SIZE(r9a07g044_crit_mod_clks),
+
+ /* Module Clocks */
+ .mod_clks = r9a07g044_mod_clks,
+ .num_mod_clks = ARRAY_SIZE(r9a07g044_mod_clks),
+ .num_hw_mod_clks = R9A07G044_CLK_MIPI_DSI_PIN + 1,
+};
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
index caa0f9414e45..558191c99b48 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.c
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -26,19 +26,135 @@
#include "rcar-cpg-lib.h"
#include "rcar-gen3-cpg.h"
-#define CPG_PLL0CR 0x00d8
+#define CPG_PLLECR 0x00d0 /* PLL Enable Control Register */
+
+#define CPG_PLLECR_PLLST(n) BIT(8 + (n)) /* PLLn Circuit Status */
+
+#define CPG_PLL0CR 0x00d8 /* PLLn Control Registers */
#define CPG_PLL2CR 0x002c
#define CPG_PLL4CR 0x01f4
+#define CPG_PLLnCR_STC_MASK GENMASK(30, 24) /* PLL Circuit Mult. Ratio */
+
#define CPG_RCKCR_CKSEL BIT(15) /* RCLK Clock Source Select */
+/* PLL Clocks */
+struct cpg_pll_clk {
+ struct clk_hw hw;
+ void __iomem *pllcr_reg;
+ void __iomem *pllecr_reg;
+ unsigned int fixed_mult;
+ u32 pllecr_pllst_mask;
+};
+
+#define to_pll_clk(_hw) container_of(_hw, struct cpg_pll_clk, hw)
+
+static unsigned long cpg_pll_clk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct cpg_pll_clk *pll_clk = to_pll_clk(hw);
+ unsigned int mult;
+ u32 val;
+
+ val = readl(pll_clk->pllcr_reg) & CPG_PLLnCR_STC_MASK;
+ mult = (val >> __ffs(CPG_PLLnCR_STC_MASK)) + 1;
+
+ return parent_rate * mult * pll_clk->fixed_mult;
+}
+
+static int cpg_pll_clk_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct cpg_pll_clk *pll_clk = to_pll_clk(hw);
+ unsigned int min_mult, max_mult, mult;
+ unsigned long prate;
+
+ prate = req->best_parent_rate * pll_clk->fixed_mult;
+ min_mult = max(div64_ul(req->min_rate, prate), 1ULL);
+ max_mult = min(div64_ul(req->max_rate, prate), 128ULL);
+ if (max_mult < min_mult)
+ return -EINVAL;
+
+ mult = DIV_ROUND_CLOSEST_ULL(req->rate, prate);
+ mult = clamp(mult, min_mult, max_mult);
+
+ req->rate = prate * mult;
+ return 0;
+}
+
+static int cpg_pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct cpg_pll_clk *pll_clk = to_pll_clk(hw);
+ unsigned int mult, i;
+ u32 val;
+
+ mult = DIV_ROUND_CLOSEST_ULL(rate, parent_rate * pll_clk->fixed_mult);
+ mult = clamp(mult, 1U, 128U);
+
+ val = readl(pll_clk->pllcr_reg);
+ val &= ~CPG_PLLnCR_STC_MASK;
+ val |= (mult - 1) << __ffs(CPG_PLLnCR_STC_MASK);
+ writel(val, pll_clk->pllcr_reg);
+
+ for (i = 1000; i; i--) {
+ if (readl(pll_clk->pllecr_reg) & pll_clk->pllecr_pllst_mask)
+ return 0;
+
+ cpu_relax();
+ }
+
+ return -ETIMEDOUT;
+}
+
+static const struct clk_ops cpg_pll_clk_ops = {
+ .recalc_rate = cpg_pll_clk_recalc_rate,
+ .determine_rate = cpg_pll_clk_determine_rate,
+ .set_rate = cpg_pll_clk_set_rate,
+};
+
+static struct clk * __init cpg_pll_clk_register(const char *name,
+ const char *parent_name,
+ void __iomem *base,
+ unsigned int mult,
+ unsigned int offset,
+ unsigned int index)
+
+{
+ struct cpg_pll_clk *pll_clk;
+ struct clk_init_data init = {};
+ struct clk *clk;
+
+ pll_clk = kzalloc(sizeof(*pll_clk), GFP_KERNEL);
+ if (!pll_clk)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &cpg_pll_clk_ops;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ pll_clk->hw.init = &init;
+ pll_clk->pllcr_reg = base + offset;
+ pll_clk->pllecr_reg = base + CPG_PLLECR;
+ pll_clk->fixed_mult = mult; /* PLL refclk x (setting + 1) x mult */
+ pll_clk->pllecr_pllst_mask = CPG_PLLECR_PLLST(index);
+
+ clk = clk_register(NULL, &pll_clk->hw);
+ if (IS_ERR(clk))
+ kfree(pll_clk);
+
+ return clk;
+}
+
/*
* Z Clock & Z2 Clock
*
* Traits of this clock:
* prepare - clk_prepare only ensures that parents are prepared
* enable - clk_enable only ensures that parents are enabled
- * rate - rate is adjustable. clk->rate = (parent->rate * mult / 32 ) / 2
+ * rate - rate is adjustable.
+ * clk->rate = (parent->rate * mult / 32 ) / fixed_div
* parent - fixed parent. No clk_set_parent support
*/
#define CPG_FRQCRB 0x00000004
@@ -49,8 +165,9 @@ struct cpg_z_clk {
struct clk_hw hw;
void __iomem *reg;
void __iomem *kick_reg;
- unsigned long mask;
+ 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)
@@ -74,7 +191,18 @@ static int cpg_z_clk_determine_rate(struct clk_hw *hw,
{
struct cpg_z_clk *zclk = to_z_clk(hw);
unsigned int min_mult, max_mult, mult;
- unsigned long prate;
+ 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);
@@ -82,10 +210,10 @@ static int cpg_z_clk_determine_rate(struct clk_hw *hw,
if (max_mult < min_mult)
return -EINVAL;
- mult = div64_ul(req->rate * 32ULL, prate);
+ mult = DIV_ROUND_CLOSEST_ULL(rate * 32ULL, prate);
mult = clamp(mult, min_mult, max_mult);
- req->rate = div_u64((u64)prate * mult, 32);
+ req->rate = DIV_ROUND_CLOSEST_ULL((u64)prate * mult, 32);
return 0;
}
@@ -103,8 +231,7 @@ static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate,
if (readl(zclk->kick_reg) & CPG_FRQCRB_KICK)
return -EBUSY;
- cpg_reg_modify(zclk->reg, zclk->mask,
- ((32 - mult) << __ffs(zclk->mask)) & zclk->mask);
+ cpg_reg_modify(zclk->reg, zclk->mask, (32 - mult) << __ffs(zclk->mask));
/*
* Set KICK bit in FRQCRB to update hardware setting and wait for
@@ -117,7 +244,7 @@ static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate,
*
* Using experimental measurements, it seems that no more than
* ~10 iterations are needed, independently of the CPU rate.
- * Since this value might be dependent of external xtal rate, pll1
+ * 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.
*/
@@ -153,7 +280,7 @@ static struct clk * __init cpg_z_clk_register(const char *name,
init.name = name;
init.ops = &cpg_z_clk_ops;
- init.flags = 0;
+ init.flags = CLK_SET_RATE_PARENT;
init.parent_names = &parent_name;
init.num_parents = 1;
@@ -164,9 +291,13 @@ static struct clk * __init cpg_z_clk_register(const char *name,
zclk->fixed_div = div; /* PLLVCO x 1/div x SYS-CPU divider */
clk = clk_register(NULL, &zclk->hw);
- if (IS_ERR(clk))
+ 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;
}
@@ -314,16 +445,13 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
case CLK_TYPE_GEN3_PLL0:
/*
- * PLL0 is a configurable multiplier clock. Register it as a
- * fixed factor clock for now as there's no generic multiplier
- * clock implementation and we currently have no need to change
- * the multiplier value.
+ * PLL0 is implemented as a custom clock, to change the
+ * multiplier when cpufreq changes between normal and boost
+ * modes.
*/
- value = readl(base + CPG_PLL0CR);
- mult = (((value >> 24) & 0x7f) + 1) * 2;
- if (cpg_quirks & PLL_ERRATA)
- mult *= 2;
- break;
+ mult = (cpg_quirks & PLL_ERRATA) ? 4 : 2;
+ return cpg_pll_clk_register(core->name, __clk_get_name(parent),
+ base, mult, CPG_PLL0CR, 0);
case CLK_TYPE_GEN3_PLL1:
mult = cpg_pll_config->pll1_mult;
@@ -332,16 +460,13 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
case CLK_TYPE_GEN3_PLL2:
/*
- * PLL2 is a configurable multiplier clock. Register it as a
- * fixed factor clock for now as there's no generic multiplier
- * clock implementation and we currently have no need to change
- * the multiplier value.
+ * PLL2 is implemented as a custom clock, to change the
+ * multiplier when cpufreq changes between normal and boost
+ * modes.
*/
- value = readl(base + CPG_PLL2CR);
- mult = (((value >> 24) & 0x7f) + 1) * 2;
- if (cpg_quirks & PLL_ERRATA)
- mult *= 2;
- break;
+ mult = (cpg_quirks & PLL_ERRATA) ? 4 : 2;
+ return cpg_pll_clk_register(core->name, __clk_get_name(parent),
+ base, mult, CPG_PLL2CR, 2);
case CLK_TYPE_GEN3_PLL3:
mult = cpg_pll_config->pll3_mult;
diff --git a/drivers/clk/renesas/rcar-usb2-clock-sel.c b/drivers/clk/renesas/rcar-usb2-clock-sel.c
index 34a85dc95beb..9fb79bd79435 100644
--- a/drivers/clk/renesas/rcar-usb2-clock-sel.c
+++ b/drivers/clk/renesas/rcar-usb2-clock-sel.c
@@ -128,10 +128,8 @@ static int rcar_usb2_clock_sel_resume(struct device *dev)
static int rcar_usb2_clock_sel_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct usb2_clock_sel_priv *priv = platform_get_drvdata(pdev);
of_clk_del_provider(dev->of_node);
- clk_hw_unregister(&priv->hw);
pm_runtime_put(dev);
pm_runtime_disable(dev);
@@ -164,9 +162,6 @@ static int rcar_usb2_clock_sel_probe(struct platform_device *pdev)
if (IS_ERR(priv->rsts))
return PTR_ERR(priv->rsts);
- pm_runtime_enable(dev);
- pm_runtime_get_sync(dev);
-
clk = devm_clk_get(dev, "usb_extal");
if (!IS_ERR(clk) && !clk_prepare_enable(clk)) {
priv->extal = !!clk_get_rate(clk);
@@ -183,6 +178,8 @@ static int rcar_usb2_clock_sel_probe(struct platform_device *pdev)
return -ENOENT;
}
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
platform_set_drvdata(pdev, priv);
dev_set_drvdata(dev, priv);
@@ -190,11 +187,20 @@ static int rcar_usb2_clock_sel_probe(struct platform_device *pdev)
init.ops = &usb2_clock_sel_clock_ops;
priv->hw.init = &init;
- clk = clk_register(NULL, &priv->hw);
- if (IS_ERR(clk))
- return PTR_ERR(clk);
+ ret = devm_clk_hw_register(NULL, &priv->hw);
+ if (ret)
+ goto pm_put;
+
+ ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &priv->hw);
+ if (ret)
+ goto pm_put;
+
+ return 0;
- return of_clk_add_hw_provider(np, of_clk_hw_simple_get, &priv->hw);
+pm_put:
+ pm_runtime_put(dev);
+ pm_runtime_disable(dev);
+ return ret;
}
static const struct dev_pm_ops rcar_usb2_clock_sel_pm_ops = {
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index fc531d35b269..21f762aa2131 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -100,13 +100,9 @@ static const u16 srcr_for_v3u[] = {
0x2C20, 0x2C24, 0x2C28, 0x2C2C, 0x2C30, 0x2C34, 0x2C38,
};
-/* Realtime Module Stop Control Register offsets */
-#define RMSTPCR(i) (smstpcr[i] - 0x20)
-
-/* Modem Module Stop Control Register offsets (r8a73a4) */
-#define MMSTPCR(i) (smstpcr[i] + 0x20)
-
-/* Software Reset Clearing Register offsets */
+/*
+ * Software Reset Clearing Register offsets
+ */
static const u16 srstclr[] = {
0x940, 0x944, 0x948, 0x94C, 0x950, 0x954, 0x958, 0x95C,
diff --git a/drivers/clk/renesas/renesas-rzg2l-cpg.c b/drivers/clk/renesas/renesas-rzg2l-cpg.c
new file mode 100644
index 000000000000..5009b9e48b13
--- /dev/null
+++ b/drivers/clk/renesas/renesas-rzg2l-cpg.c
@@ -0,0 +1,750 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * RZ/G2L Clock Pulse Generator
+ *
+ * Copyright (C) 2021 Renesas Electronics Corp.
+ *
+ * Based on renesas-cpg-mssr.c
+ *
+ * Copyright (C) 2015 Glider bvba
+ * Copyright (C) 2013 Ideas On Board SPRL
+ * Copyright (C) 2015 Renesas Electronics Corp.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clk/renesas.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_domain.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+#include "renesas-rzg2l-cpg.h"
+
+#ifdef DEBUG
+#define WARN_DEBUG(x) WARN_ON(x)
+#else
+#define WARN_DEBUG(x) do { } while (0)
+#endif
+
+#define DIV_RSMASK(v, s, m) ((v >> s) & m)
+#define GET_SHIFT(val) ((val >> 12) & 0xff)
+#define GET_WIDTH(val) ((val >> 8) & 0xf)
+
+#define KDIV(val) DIV_RSMASK(val, 16, 0xffff)
+#define MDIV(val) DIV_RSMASK(val, 6, 0x3ff)
+#define PDIV(val) DIV_RSMASK(val, 0, 0x3f)
+#define SDIV(val) DIV_RSMASK(val, 0, 0x7)
+
+#define CLK_ON_R(reg) (reg)
+#define CLK_MON_R(reg) (0x680 - 0x500 + (reg))
+#define CLK_RST_R(reg) (0x800 - 0x500 + (reg))
+#define CLK_MRST_R(reg) (0x980 - 0x500 + (reg))
+
+#define GET_REG_OFFSET(val) ((val >> 20) & 0xfff)
+#define GET_REG_SAMPLL_CLK1(val) ((val >> 22) & 0xfff)
+#define GET_REG_SAMPLL_CLK2(val) ((val >> 12) & 0xfff)
+
+/**
+ * struct rzg2l_cpg_priv - Clock Pulse Generator Private Data
+ *
+ * @rcdev: Reset controller entity
+ * @dev: CPG device
+ * @base: CPG register block base address
+ * @rmw_lock: protects register accesses
+ * @clks: Array containing all Core and Module Clocks
+ * @num_core_clks: Number of Core Clocks in clks[]
+ * @num_mod_clks: Number of Module Clocks in clks[]
+ * @last_dt_core_clk: ID of the last Core Clock exported to DT
+ * @notifiers: Notifier chain to save/restore clock state for system resume
+ * @info: Pointer to platform data
+ */
+struct rzg2l_cpg_priv {
+ struct reset_controller_dev rcdev;
+ struct device *dev;
+ void __iomem *base;
+ spinlock_t rmw_lock;
+
+ struct clk **clks;
+ unsigned int num_core_clks;
+ unsigned int num_mod_clks;
+ unsigned int last_dt_core_clk;
+
+ struct raw_notifier_head notifiers;
+ const struct rzg2l_cpg_info *info;
+};
+
+static void rzg2l_cpg_del_clk_provider(void *data)
+{
+ of_clk_del_provider(data);
+}
+
+static struct clk * __init
+rzg2l_cpg_div_clk_register(const struct cpg_core_clk *core,
+ struct clk **clks,
+ void __iomem *base,
+ struct rzg2l_cpg_priv *priv)
+{
+ struct device *dev = priv->dev;
+ const struct clk *parent;
+ const char *parent_name;
+ struct clk_hw *clk_hw;
+
+ parent = clks[core->parent & 0xffff];
+ if (IS_ERR(parent))
+ return ERR_CAST(parent);
+
+ parent_name = __clk_get_name(parent);
+
+ if (core->dtable)
+ clk_hw = clk_hw_register_divider_table(dev, core->name,
+ parent_name, 0,
+ base + GET_REG_OFFSET(core->conf),
+ GET_SHIFT(core->conf),
+ GET_WIDTH(core->conf),
+ core->flag,
+ core->dtable,
+ &priv->rmw_lock);
+ else
+ clk_hw = clk_hw_register_divider(dev, core->name,
+ parent_name, 0,
+ base + GET_REG_OFFSET(core->conf),
+ GET_SHIFT(core->conf),
+ GET_WIDTH(core->conf),
+ core->flag, &priv->rmw_lock);
+
+ if (IS_ERR(clk_hw))
+ return NULL;
+
+ return clk_hw->clk;
+}
+
+struct pll_clk {
+ struct clk_hw hw;
+ unsigned int conf;
+ unsigned int type;
+ void __iomem *base;
+ struct rzg2l_cpg_priv *priv;
+};
+
+#define to_pll(_hw) container_of(_hw, struct pll_clk, hw)
+
+static unsigned long rzg2l_cpg_pll_clk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct pll_clk *pll_clk = to_pll(hw);
+ struct rzg2l_cpg_priv *priv = pll_clk->priv;
+ unsigned int val1, val2;
+ unsigned int mult = 1;
+ unsigned int div = 1;
+
+ if (pll_clk->type != CLK_TYPE_SAM_PLL)
+ return parent_rate;
+
+ val1 = readl(priv->base + GET_REG_SAMPLL_CLK1(pll_clk->conf));
+ val2 = readl(priv->base + GET_REG_SAMPLL_CLK2(pll_clk->conf));
+ mult = MDIV(val1) + KDIV(val1) / 65536;
+ div = PDIV(val1) * (1 << SDIV(val2));
+
+ return DIV_ROUND_CLOSEST_ULL((u64)parent_rate * mult, div);
+}
+
+static const struct clk_ops rzg2l_cpg_pll_ops = {
+ .recalc_rate = rzg2l_cpg_pll_clk_recalc_rate,
+};
+
+static struct clk * __init
+rzg2l_cpg_pll_clk_register(const struct cpg_core_clk *core,
+ struct clk **clks,
+ void __iomem *base,
+ struct rzg2l_cpg_priv *priv)
+{
+ struct device *dev = priv->dev;
+ const struct clk *parent;
+ struct clk_init_data init;
+ const char *parent_name;
+ struct pll_clk *pll_clk;
+ struct clk *clk;
+
+ parent = clks[core->parent & 0xffff];
+ if (IS_ERR(parent))
+ return ERR_CAST(parent);
+
+ pll_clk = devm_kzalloc(dev, sizeof(*pll_clk), GFP_KERNEL);
+ if (!pll_clk) {
+ clk = ERR_PTR(-ENOMEM);
+ return NULL;
+ }
+
+ parent_name = __clk_get_name(parent);
+ init.name = core->name;
+ init.ops = &rzg2l_cpg_pll_ops;
+ init.flags = 0;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ pll_clk->hw.init = &init;
+ pll_clk->conf = core->conf;
+ pll_clk->base = base;
+ pll_clk->priv = priv;
+ pll_clk->type = core->type;
+
+ clk = clk_register(NULL, &pll_clk->hw);
+ if (IS_ERR(clk))
+ kfree(pll_clk);
+
+ return clk;
+}
+
+static struct clk
+*rzg2l_cpg_clk_src_twocell_get(struct of_phandle_args *clkspec,
+ void *data)
+{
+ unsigned int clkidx = clkspec->args[1];
+ struct rzg2l_cpg_priv *priv = data;
+ struct device *dev = priv->dev;
+ const char *type;
+ struct clk *clk;
+
+ switch (clkspec->args[0]) {
+ case CPG_CORE:
+ type = "core";
+ if (clkidx > priv->last_dt_core_clk) {
+ dev_err(dev, "Invalid %s clock index %u\n", type, clkidx);
+ return ERR_PTR(-EINVAL);
+ }
+ clk = priv->clks[clkidx];
+ break;
+
+ case CPG_MOD:
+ type = "module";
+ if (clkidx > priv->num_mod_clks) {
+ dev_err(dev, "Invalid %s clock index %u\n", type,
+ clkidx);
+ return ERR_PTR(-EINVAL);
+ }
+ clk = priv->clks[priv->num_core_clks + clkidx];
+ break;
+
+ default:
+ dev_err(dev, "Invalid CPG clock type %u\n", clkspec->args[0]);
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (IS_ERR(clk))
+ dev_err(dev, "Cannot get %s clock %u: %ld", type, clkidx,
+ PTR_ERR(clk));
+ else
+ dev_dbg(dev, "clock (%u, %u) is %pC at %lu Hz\n",
+ clkspec->args[0], clkspec->args[1], clk,
+ clk_get_rate(clk));
+ return clk;
+}
+
+static void __init
+rzg2l_cpg_register_core_clk(const struct cpg_core_clk *core,
+ const struct rzg2l_cpg_info *info,
+ struct rzg2l_cpg_priv *priv)
+{
+ struct clk *clk = ERR_PTR(-EOPNOTSUPP), *parent;
+ struct device *dev = priv->dev;
+ unsigned int id = core->id, div = core->div;
+ const char *parent_name;
+
+ WARN_DEBUG(id >= priv->num_core_clks);
+ WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT);
+
+ if (!core->name) {
+ /* Skip NULLified clock */
+ return;
+ }
+
+ switch (core->type) {
+ case CLK_TYPE_IN:
+ clk = of_clk_get_by_name(priv->dev->of_node, core->name);
+ break;
+ case CLK_TYPE_FF:
+ WARN_DEBUG(core->parent >= priv->num_core_clks);
+ parent = priv->clks[core->parent];
+ if (IS_ERR(parent)) {
+ clk = parent;
+ goto fail;
+ }
+
+ parent_name = __clk_get_name(parent);
+ clk = clk_register_fixed_factor(NULL, core->name,
+ parent_name, CLK_SET_RATE_PARENT,
+ core->mult, div);
+ break;
+ case CLK_TYPE_SAM_PLL:
+ clk = rzg2l_cpg_pll_clk_register(core, priv->clks,
+ priv->base, priv);
+ break;
+ case CLK_TYPE_DIV:
+ clk = rzg2l_cpg_div_clk_register(core, priv->clks,
+ priv->base, priv);
+ break;
+ default:
+ goto fail;
+ };
+
+ if (IS_ERR_OR_NULL(clk))
+ goto fail;
+
+ dev_dbg(dev, "Core clock %pC at %lu Hz\n", clk, clk_get_rate(clk));
+ priv->clks[id] = clk;
+ return;
+
+fail:
+ dev_err(dev, "Failed to register %s clock %s: %ld\n", "core",
+ core->name, PTR_ERR(clk));
+}
+
+/**
+ * struct mstp_clock - MSTP gating clock
+ *
+ * @hw: handle between common and hardware-specific interfaces
+ * @off: register offset
+ * @onoff: ON/MON bits
+ * @reset: reset bits
+ * @priv: CPG/MSTP private data
+ */
+struct mstp_clock {
+ struct clk_hw hw;
+ u16 off;
+ u8 onoff;
+ u8 reset;
+ struct rzg2l_cpg_priv *priv;
+};
+
+#define to_mod_clock(_hw) container_of(_hw, struct mstp_clock, hw)
+
+static int rzg2l_mod_clock_endisable(struct clk_hw *hw, bool enable)
+{
+ struct mstp_clock *clock = to_mod_clock(hw);
+ struct rzg2l_cpg_priv *priv = clock->priv;
+ unsigned int reg = clock->off;
+ struct device *dev = priv->dev;
+ unsigned long flags;
+ unsigned int i;
+ u32 value;
+
+ if (!clock->off) {
+ dev_dbg(dev, "%pC does not support ON/OFF\n", hw->clk);
+ return 0;
+ }
+
+ dev_dbg(dev, "CLK_ON %u/%pC %s\n", CLK_ON_R(reg), hw->clk,
+ enable ? "ON" : "OFF");
+ spin_lock_irqsave(&priv->rmw_lock, flags);
+
+ if (enable)
+ value = (clock->onoff << 16) | clock->onoff;
+ else
+ value = clock->onoff << 16;
+ writel(value, priv->base + CLK_ON_R(reg));
+
+ spin_unlock_irqrestore(&priv->rmw_lock, flags);
+
+ if (!enable)
+ return 0;
+
+ for (i = 1000; i > 0; --i) {
+ if (((readl(priv->base + CLK_MON_R(reg))) & clock->onoff))
+ break;
+ cpu_relax();
+ }
+
+ if (!i) {
+ dev_err(dev, "Failed to enable CLK_ON %p\n",
+ priv->base + CLK_ON_R(reg));
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int rzg2l_mod_clock_enable(struct clk_hw *hw)
+{
+ return rzg2l_mod_clock_endisable(hw, true);
+}
+
+static void rzg2l_mod_clock_disable(struct clk_hw *hw)
+{
+ rzg2l_mod_clock_endisable(hw, false);
+}
+
+static int rzg2l_mod_clock_is_enabled(struct clk_hw *hw)
+{
+ struct mstp_clock *clock = to_mod_clock(hw);
+ struct rzg2l_cpg_priv *priv = clock->priv;
+ u32 value;
+
+ if (!clock->off) {
+ dev_dbg(priv->dev, "%pC does not support ON/OFF\n", hw->clk);
+ return 1;
+ }
+
+ value = readl(priv->base + CLK_MON_R(clock->off));
+
+ return !(value & clock->onoff);
+}
+
+static const struct clk_ops rzg2l_mod_clock_ops = {
+ .enable = rzg2l_mod_clock_enable,
+ .disable = rzg2l_mod_clock_disable,
+ .is_enabled = rzg2l_mod_clock_is_enabled,
+};
+
+static void __init
+rzg2l_cpg_register_mod_clk(const struct rzg2l_mod_clk *mod,
+ const struct rzg2l_cpg_info *info,
+ struct rzg2l_cpg_priv *priv)
+{
+ struct mstp_clock *clock = NULL;
+ struct device *dev = priv->dev;
+ unsigned int id = mod->id;
+ struct clk_init_data init;
+ struct clk *parent, *clk;
+ const char *parent_name;
+ unsigned int i;
+
+ WARN_DEBUG(id < priv->num_core_clks);
+ WARN_DEBUG(id >= priv->num_core_clks + priv->num_mod_clks);
+ WARN_DEBUG(mod->parent >= priv->num_core_clks + priv->num_mod_clks);
+ WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT);
+
+ if (!mod->name) {
+ /* Skip NULLified clock */
+ return;
+ }
+
+ parent = priv->clks[mod->parent];
+ if (IS_ERR(parent)) {
+ clk = parent;
+ goto fail;
+ }
+
+ clock = devm_kzalloc(dev, sizeof(*clock), GFP_KERNEL);
+ if (!clock) {
+ clk = ERR_PTR(-ENOMEM);
+ goto fail;
+ }
+
+ init.name = mod->name;
+ init.ops = &rzg2l_mod_clock_ops;
+ init.flags = CLK_SET_RATE_PARENT;
+ for (i = 0; i < info->num_crit_mod_clks; i++)
+ if (id == info->crit_mod_clks[i]) {
+ dev_dbg(dev, "CPG %s setting CLK_IS_CRITICAL\n",
+ mod->name);
+ init.flags |= CLK_IS_CRITICAL;
+ break;
+ }
+
+ parent_name = __clk_get_name(parent);
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ clock->off = mod->off;
+ clock->onoff = mod->onoff;
+ clock->reset = mod->reset;
+ clock->priv = priv;
+ clock->hw.init = &init;
+
+ clk = clk_register(NULL, &clock->hw);
+ if (IS_ERR(clk))
+ goto fail;
+
+ dev_dbg(dev, "Module clock %pC at %lu Hz\n", clk, clk_get_rate(clk));
+ priv->clks[id] = clk;
+ return;
+
+fail:
+ dev_err(dev, "Failed to register %s clock %s: %ld\n", "module",
+ mod->name, PTR_ERR(clk));
+ kfree(clock);
+}
+
+#define rcdev_to_priv(x) container_of(x, struct rzg2l_cpg_priv, rcdev)
+
+static int rzg2l_cpg_reset(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct rzg2l_cpg_priv *priv = rcdev_to_priv(rcdev);
+ const struct rzg2l_cpg_info *info = priv->info;
+ unsigned int reg = info->mod_clks[id].off;
+ u32 dis = info->mod_clks[id].reset;
+ u32 we = dis << 16;
+
+ dev_dbg(rcdev->dev, "reset name:%s id:%ld offset:0x%x\n",
+ info->mod_clks[id].name, id, CLK_RST_R(reg));
+
+ /* Reset module */
+ writel(we, priv->base + CLK_RST_R(reg));
+
+ /* Wait for at least one cycle of the RCLK clock (@ ca. 32 kHz) */
+ udelay(35);
+
+ /* Release module from reset state */
+ writel(we | dis, priv->base + CLK_RST_R(reg));
+
+ return 0;
+}
+
+static int rzg2l_cpg_assert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct rzg2l_cpg_priv *priv = rcdev_to_priv(rcdev);
+ const struct rzg2l_cpg_info *info = priv->info;
+ unsigned int reg = info->mod_clks[id].off;
+ u32 value = info->mod_clks[id].reset << 16;
+
+ dev_dbg(rcdev->dev, "assert name:%s id:%ld offset:0x%x\n",
+ info->mod_clks[id].name, id, CLK_RST_R(reg));
+
+ writel(value, priv->base + CLK_RST_R(reg));
+ return 0;
+}
+
+static int rzg2l_cpg_deassert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct rzg2l_cpg_priv *priv = rcdev_to_priv(rcdev);
+ const struct rzg2l_cpg_info *info = priv->info;
+ unsigned int reg = info->mod_clks[id].off;
+ u32 dis = info->mod_clks[id].reset;
+ u32 value = (dis << 16) | dis;
+
+ dev_dbg(rcdev->dev, "deassert name:%s id:%ld offset:0x%x\n",
+ info->mod_clks[id].name, id, CLK_RST_R(reg));
+
+ writel(value, priv->base + CLK_RST_R(reg));
+ return 0;
+}
+
+static int rzg2l_cpg_status(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct rzg2l_cpg_priv *priv = rcdev_to_priv(rcdev);
+ const struct rzg2l_cpg_info *info = priv->info;
+ unsigned int reg = info->mod_clks[id].off;
+ u32 bitmask = info->mod_clks[id].reset;
+
+ return !(readl(priv->base + CLK_MRST_R(reg)) & bitmask);
+}
+
+static const struct reset_control_ops rzg2l_cpg_reset_ops = {
+ .reset = rzg2l_cpg_reset,
+ .assert = rzg2l_cpg_assert,
+ .deassert = rzg2l_cpg_deassert,
+ .status = rzg2l_cpg_status,
+};
+
+static int rzg2l_cpg_reset_xlate(struct reset_controller_dev *rcdev,
+ const struct of_phandle_args *reset_spec)
+{
+ unsigned int id = reset_spec->args[0];
+
+ if (id >= rcdev->nr_resets) {
+ dev_err(rcdev->dev, "Invalid reset index %u\n", id);
+ return -EINVAL;
+ }
+
+ return id;
+}
+
+static int rzg2l_cpg_reset_controller_register(struct rzg2l_cpg_priv *priv)
+{
+ priv->rcdev.ops = &rzg2l_cpg_reset_ops;
+ priv->rcdev.of_node = priv->dev->of_node;
+ priv->rcdev.dev = priv->dev;
+ priv->rcdev.of_reset_n_cells = 1;
+ priv->rcdev.of_xlate = rzg2l_cpg_reset_xlate;
+ priv->rcdev.nr_resets = priv->num_mod_clks;
+
+ return devm_reset_controller_register(priv->dev, &priv->rcdev);
+}
+
+static bool rzg2l_cpg_is_pm_clk(const struct of_phandle_args *clkspec)
+{
+ if (clkspec->args_count != 2)
+ return false;
+
+ switch (clkspec->args[0]) {
+ case CPG_MOD:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+static int rzg2l_cpg_attach_dev(struct generic_pm_domain *unused, struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ struct of_phandle_args clkspec;
+ struct clk *clk;
+ int error;
+ int i = 0;
+
+ while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i,
+ &clkspec)) {
+ if (rzg2l_cpg_is_pm_clk(&clkspec))
+ goto found;
+
+ of_node_put(clkspec.np);
+ i++;
+ }
+
+ return 0;
+
+found:
+ clk = of_clk_get_from_provider(&clkspec);
+ of_node_put(clkspec.np);
+
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ error = pm_clk_create(dev);
+ if (error)
+ goto fail_put;
+
+ error = pm_clk_add_clk(dev, clk);
+ if (error)
+ goto fail_destroy;
+
+ return 0;
+
+fail_destroy:
+ pm_clk_destroy(dev);
+fail_put:
+ clk_put(clk);
+ return error;
+}
+
+static void rzg2l_cpg_detach_dev(struct generic_pm_domain *unused, struct device *dev)
+{
+ if (!pm_clk_no_clocks(dev))
+ pm_clk_destroy(dev);
+}
+
+static int __init rzg2l_cpg_add_clk_domain(struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ struct generic_pm_domain *genpd;
+
+ genpd = devm_kzalloc(dev, sizeof(*genpd), GFP_KERNEL);
+ if (!genpd)
+ return -ENOMEM;
+
+ genpd->name = np->name;
+ genpd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ALWAYS_ON |
+ GENPD_FLAG_ACTIVE_WAKEUP;
+ genpd->attach_dev = rzg2l_cpg_attach_dev;
+ genpd->detach_dev = rzg2l_cpg_detach_dev;
+ pm_genpd_init(genpd, &pm_domain_always_on_gov, false);
+
+ of_genpd_add_provider_simple(np, genpd);
+ return 0;
+}
+
+static int __init rzg2l_cpg_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ const struct rzg2l_cpg_info *info;
+ struct rzg2l_cpg_priv *priv;
+ unsigned int nclks, i;
+ struct clk **clks;
+ int error;
+
+ info = of_device_get_match_data(dev);
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ priv->info = info;
+ spin_lock_init(&priv->rmw_lock);
+
+ priv->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ nclks = info->num_total_core_clks + info->num_hw_mod_clks;
+ clks = devm_kmalloc_array(dev, nclks, sizeof(*clks), GFP_KERNEL);
+ if (!clks)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, priv);
+ priv->clks = clks;
+ priv->num_core_clks = info->num_total_core_clks;
+ priv->num_mod_clks = info->num_hw_mod_clks;
+ priv->last_dt_core_clk = info->last_dt_core_clk;
+
+ for (i = 0; i < nclks; i++)
+ clks[i] = ERR_PTR(-ENOENT);
+
+ for (i = 0; i < info->num_core_clks; i++)
+ rzg2l_cpg_register_core_clk(&info->core_clks[i], info, priv);
+
+ for (i = 0; i < info->num_mod_clks; i++)
+ rzg2l_cpg_register_mod_clk(&info->mod_clks[i], info, priv);
+
+ error = of_clk_add_provider(np, rzg2l_cpg_clk_src_twocell_get, priv);
+ if (error)
+ return error;
+
+ error = devm_add_action_or_reset(dev, rzg2l_cpg_del_clk_provider, np);
+ if (error)
+ return error;
+
+ error = rzg2l_cpg_add_clk_domain(dev);
+ if (error)
+ return error;
+
+ error = rzg2l_cpg_reset_controller_register(priv);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+static const struct of_device_id rzg2l_cpg_match[] = {
+#ifdef CONFIG_CLK_R9A07G044
+ {
+ .compatible = "renesas,r9a07g044-cpg",
+ .data = &r9a07g044_cpg_info,
+ },
+#endif
+ { /* sentinel */ }
+};
+
+static struct platform_driver rzg2l_cpg_driver = {
+ .driver = {
+ .name = "rzg2l-cpg",
+ .of_match_table = rzg2l_cpg_match,
+ },
+};
+
+static int __init rzg2l_cpg_init(void)
+{
+ return platform_driver_probe(&rzg2l_cpg_driver, rzg2l_cpg_probe);
+}
+
+subsys_initcall(rzg2l_cpg_init);
+
+MODULE_DESCRIPTION("Renesas RZ/G2L CPG Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/clk/renesas/renesas-rzg2l-cpg.h b/drivers/clk/renesas/renesas-rzg2l-cpg.h
new file mode 100644
index 000000000000..3948bdd8afc9
--- /dev/null
+++ b/drivers/clk/renesas/renesas-rzg2l-cpg.h
@@ -0,0 +1,136 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * RZ/G2L Clock Pulse Generator
+ *
+ * Copyright (C) 2021 Renesas Electronics Corp.
+ *
+ */
+
+#ifndef __RENESAS_RZG2L_CPG_H__
+#define __RENESAS_RZG2L_CPG_H__
+
+#define CPG_PL2_DDIV (0x204)
+#define CPG_PL3A_DDIV (0x208)
+
+/* n = 0/1/2 for PLL1/4/6 */
+#define CPG_SAMPLL_CLK1(n) (0x04 + (16 * n))
+#define CPG_SAMPLL_CLK2(n) (0x08 + (16 * n))
+
+#define PLL146_CONF(n) (CPG_SAMPLL_CLK1(n) << 22 | CPG_SAMPLL_CLK2(n) << 12)
+
+#define DDIV_PACK(offset, bitpos, size) \
+ (((offset) << 20) | ((bitpos) << 12) | ((size) << 8))
+#define DIVPL2A DDIV_PACK(CPG_PL2_DDIV, 0, 3)
+#define DIVPL3B DDIV_PACK(CPG_PL3A_DDIV, 4, 3)
+
+/**
+ * Definitions of CPG Core Clocks
+ *
+ * These include:
+ * - Clock outputs exported to DT
+ * - External input clocks
+ * - Internal CPG clocks
+ */
+struct cpg_core_clk {
+ const char *name;
+ unsigned int id;
+ unsigned int parent;
+ unsigned int div;
+ unsigned int mult;
+ unsigned int type;
+ unsigned int conf;
+ const struct clk_div_table *dtable;
+ const char * const *parent_names;
+ int flag;
+ int num_parents;
+};
+
+enum clk_types {
+ /* Generic */
+ CLK_TYPE_IN, /* External Clock Input */
+ CLK_TYPE_FF, /* Fixed Factor Clock */
+ CLK_TYPE_SAM_PLL,
+
+ /* Clock with divider */
+ CLK_TYPE_DIV,
+};
+
+#define DEF_TYPE(_name, _id, _type...) \
+ { .name = _name, .id = _id, .type = _type }
+#define DEF_BASE(_name, _id, _type, _parent...) \
+ DEF_TYPE(_name, _id, _type, .parent = _parent)
+#define DEF_SAMPLL(_name, _id, _parent, _conf) \
+ DEF_TYPE(_name, _id, CLK_TYPE_SAM_PLL, .parent = _parent, .conf = _conf)
+#define DEF_INPUT(_name, _id) \
+ DEF_TYPE(_name, _id, CLK_TYPE_IN)
+#define DEF_FIXED(_name, _id, _parent, _mult, _div) \
+ DEF_BASE(_name, _id, CLK_TYPE_FF, _parent, .div = _div, .mult = _mult)
+#define DEF_DIV(_name, _id, _parent, _conf, _dtable, _flag) \
+ DEF_TYPE(_name, _id, CLK_TYPE_DIV, .conf = _conf, \
+ .parent = _parent, .dtable = _dtable, .flag = _flag)
+
+/**
+ * struct rzg2l_mod_clk - Module Clocks definitions
+ *
+ * @name: handle between common and hardware-specific interfaces
+ * @id: clock index in array containing all Core and Module Clocks
+ * @parent: id of parent clock
+ * @off: register offset
+ * @onoff: ON/MON bits
+ * @reset: reset bits
+ */
+struct rzg2l_mod_clk {
+ const char *name;
+ unsigned int id;
+ unsigned int parent;
+ u16 off;
+ u8 onoff;
+ u8 reset;
+};
+
+#define DEF_MOD(_name, _id, _parent, _off, _onoff, _reset) \
+ [_id] = { \
+ .name = _name, \
+ .id = MOD_CLK_BASE + _id, \
+ .parent = (_parent), \
+ .off = (_off), \
+ .onoff = (_onoff), \
+ .reset = (_reset) \
+ }
+
+/**
+ * struct rzg2l_cpg_info - SoC-specific CPG Description
+ *
+ * @core_clks: Array of Core Clock definitions
+ * @num_core_clks: Number of entries in core_clks[]
+ * @last_dt_core_clk: ID of the last Core Clock exported to DT
+ * @num_total_core_clks: Total number of Core Clocks (exported + internal)
+ *
+ * @mod_clks: Array of Module Clock definitions
+ * @num_mod_clks: Number of entries in mod_clks[]
+ * @num_hw_mod_clks: Number of Module Clocks supported by the hardware
+ *
+ * @crit_mod_clks: Array with Module Clock IDs of critical clocks that
+ * should not be disabled without a knowledgeable driver
+ * @num_crit_mod_clks: Number of entries in crit_mod_clks[]
+ */
+struct rzg2l_cpg_info {
+ /* Core Clocks */
+ const struct cpg_core_clk *core_clks;
+ unsigned int num_core_clks;
+ unsigned int last_dt_core_clk;
+ unsigned int num_total_core_clks;
+
+ /* Module Clocks */
+ const struct rzg2l_mod_clk *mod_clks;
+ unsigned int num_mod_clks;
+ unsigned int num_hw_mod_clks;
+
+ /* Critical Module Clocks that should not be disabled */
+ const unsigned int *crit_mod_clks;
+ unsigned int num_crit_mod_clks;
+};
+
+extern const struct rzg2l_cpg_info r9a07g044_cpg_info;
+
+#endif
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-28 03:48:52 +0300