[PATCH v5 4/4] clk: samsung: gs101: Enable auto_clock_gate mode for each gs101 CMU

From: Peter Griffin <peter.griffin@linaro.org>
Date: 2025-11-14 14:17:07
Also in: linux-clk, linux-devicetree, linux-samsung-soc, lkml
Subsystem: common clk framework, google tensor soc support, samsung soc clock drivers, the rest · Maintainers: Michael Turquette, Stephen Boyd, Peter Griffin, Krzysztof Kozlowski, Sylwester Nawrocki, Chanwoo Choi, Linus Torvalds

Enable auto clock mode, and define the additional fields which are used
when this mode is enabled.

/sys/kernel/debug/clk/clk_summary now reports approximately 308 running
clocks and 298 disabled clocks. Prior to this commit 586 clocks were
running and 17 disabled.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
Changes in v4:
- Remove unnecessary header of_address.h (Peter)
---
 drivers/clk/samsung/clk-gs101.c | 55 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/drivers/clk/samsung/clk-gs101.c b/drivers/clk/samsung/clk-gs101.c
index 70b26db9b95ad0b376d23f637c7683fbc8c8c600..8551289b46eb88ec61dd1914d0fe782ae6794000 100644
--- a/drivers/clk/samsung/clk-gs101.c
+++ b/drivers/clk/samsung/clk-gs101.c

@@ -26,6 +26,10 @@
 #define CLKS_NR_PERIC0	(CLK_GOUT_PERIC0_SYSREG_PERIC0_PCLK + 1)
 #define CLKS_NR_PERIC1	(CLK_GOUT_PERIC1_SYSREG_PERIC1_PCLK + 1)
 
+#define GS101_GATE_DBG_OFFSET 0x4000
+#define GS101_DRCG_EN_OFFSET  0x104
+#define GS101_MEMCLK_OFFSET   0x108
+
 /* ---- CMU_TOP ------------------------------------------------------------- */
 
 /* Register Offset definitions for CMU_TOP (0x1e080000) */

@@ -1433,6 +1437,9 @@ static const struct samsung_cmu_info top_cmu_info __initconst = {
 	.nr_clk_ids		= CLKS_NR_TOP,
 	.clk_regs		= cmu_top_clk_regs,
 	.nr_clk_regs		= ARRAY_SIZE(cmu_top_clk_regs),
+	.auto_clock_gate	= true,
+	.gate_dbg_offset	= GS101_GATE_DBG_OFFSET,
+	.option_offset		= CMU_CMU_TOP_CONTROLLER_OPTION,
 };
 
 static void __init gs101_cmu_top_init(struct device_node *np)

@@ -1900,6 +1907,11 @@ static const struct samsung_gate_clock apm_gate_clks[] __initconst = {
 	     CLK_CON_GAT_GOUT_BLK_APM_UID_XIU_DP_APM_IPCLKPORT_ACLK, 21, CLK_IS_CRITICAL, 0),
 };
 
+static const unsigned long dcrg_memclk_sysreg[] __initconst = {
+	GS101_DRCG_EN_OFFSET,
+	GS101_MEMCLK_OFFSET,
+};
+
 static const struct samsung_cmu_info apm_cmu_info __initconst = {
 	.mux_clks		= apm_mux_clks,
 	.nr_mux_clks		= ARRAY_SIZE(apm_mux_clks),

@@ -1912,6 +1924,12 @@ static const struct samsung_cmu_info apm_cmu_info __initconst = {
 	.nr_clk_ids		= CLKS_NR_APM,
 	.clk_regs		= apm_clk_regs,
 	.nr_clk_regs		= ARRAY_SIZE(apm_clk_regs),
+	.sysreg_clk_regs	= dcrg_memclk_sysreg,
+	.nr_sysreg_clk_regs	= ARRAY_SIZE(dcrg_memclk_sysreg),
+	.auto_clock_gate	= true,
+	.gate_dbg_offset	= GS101_GATE_DBG_OFFSET,
+	.drcg_offset		= GS101_DRCG_EN_OFFSET,
+	.memclk_offset		= GS101_MEMCLK_OFFSET,
 };
 
 /* ---- CMU_HSI0 ------------------------------------------------------------ */

@@ -2375,7 +2393,14 @@ static const struct samsung_cmu_info hsi0_cmu_info __initconst = {
 	.nr_clk_ids		= CLKS_NR_HSI0,
 	.clk_regs		= hsi0_clk_regs,
 	.nr_clk_regs		= ARRAY_SIZE(hsi0_clk_regs),
+	.sysreg_clk_regs	= dcrg_memclk_sysreg,
+	.nr_sysreg_clk_regs	= ARRAY_SIZE(dcrg_memclk_sysreg),
 	.clk_name		= "bus",
+	.auto_clock_gate        = true,
+	.gate_dbg_offset        = GS101_GATE_DBG_OFFSET,
+	.option_offset		= HSI0_CMU_HSI0_CONTROLLER_OPTION,
+	.drcg_offset		= GS101_DRCG_EN_OFFSET,
+	.memclk_offset		= GS101_MEMCLK_OFFSET,
 };
 
 /* ---- CMU_HSI2 ------------------------------------------------------------ */

@@ -2863,7 +2888,14 @@ static const struct samsung_cmu_info hsi2_cmu_info __initconst = {
 	.nr_clk_ids		= CLKS_NR_HSI2,
 	.clk_regs		= cmu_hsi2_clk_regs,
 	.nr_clk_regs		= ARRAY_SIZE(cmu_hsi2_clk_regs),
+	.sysreg_clk_regs	= dcrg_memclk_sysreg,
+	.nr_sysreg_clk_regs	= ARRAY_SIZE(dcrg_memclk_sysreg),
 	.clk_name		= "bus",
+	.auto_clock_gate        = true,
+	.gate_dbg_offset        = GS101_GATE_DBG_OFFSET,
+	.option_offset		= HSI2_CMU_HSI2_CONTROLLER_OPTION,
+	.drcg_offset		= GS101_DRCG_EN_OFFSET,
+	.memclk_offset		= GS101_MEMCLK_OFFSET,
 };
 
 /* ---- CMU_MISC ------------------------------------------------------------ */

@@ -3423,7 +3455,14 @@ static const struct samsung_cmu_info misc_cmu_info __initconst = {
 	.nr_clk_ids		= CLKS_NR_MISC,
 	.clk_regs		= misc_clk_regs,
 	.nr_clk_regs		= ARRAY_SIZE(misc_clk_regs),
+	.sysreg_clk_regs	= dcrg_memclk_sysreg,
+	.nr_sysreg_clk_regs	= ARRAY_SIZE(dcrg_memclk_sysreg),
 	.clk_name		= "bus",
+	.auto_clock_gate	= true,
+	.gate_dbg_offset	= GS101_GATE_DBG_OFFSET,
+	.option_offset		= MISC_CMU_MISC_CONTROLLER_OPTION,
+	.drcg_offset		= GS101_DRCG_EN_OFFSET,
+	.memclk_offset		= GS101_MEMCLK_OFFSET,
 };
 
 static void __init gs101_cmu_misc_init(struct device_node *np)

@@ -4010,6 +4049,10 @@ static const struct samsung_gate_clock peric0_gate_clks[] __initconst = {
 	     21, 0, 0),
 };
 
+static const unsigned long dcrg_sysreg[] __initconst = {
+	GS101_DRCG_EN_OFFSET,
+};
+
 static const struct samsung_cmu_info peric0_cmu_info __initconst = {
 	.mux_clks		= peric0_mux_clks,
 	.nr_mux_clks		= ARRAY_SIZE(peric0_mux_clks),

@@ -4020,7 +4063,13 @@ static const struct samsung_cmu_info peric0_cmu_info __initconst = {
 	.nr_clk_ids		= CLKS_NR_PERIC0,
 	.clk_regs		= peric0_clk_regs,
 	.nr_clk_regs		= ARRAY_SIZE(peric0_clk_regs),
+	.sysreg_clk_regs	= dcrg_sysreg,
+	.nr_sysreg_clk_regs	= ARRAY_SIZE(dcrg_sysreg),
 	.clk_name		= "bus",
+	.auto_clock_gate        = true,
+	.gate_dbg_offset        = GS101_GATE_DBG_OFFSET,
+	.option_offset		= PERIC0_CMU_PERIC0_CONTROLLER_OPTION,
+	.drcg_offset		= GS101_DRCG_EN_OFFSET,
 };
 
 /* ---- CMU_PERIC1 ---------------------------------------------------------- */

@@ -4368,7 +4417,13 @@ static const struct samsung_cmu_info peric1_cmu_info __initconst = {
 	.nr_clk_ids		= CLKS_NR_PERIC1,
 	.clk_regs		= peric1_clk_regs,
 	.nr_clk_regs		= ARRAY_SIZE(peric1_clk_regs),
+	.sysreg_clk_regs	= dcrg_sysreg,
+	.nr_sysreg_clk_regs	= ARRAY_SIZE(dcrg_sysreg),
 	.clk_name		= "bus",
+	.auto_clock_gate        = true,
+	.gate_dbg_offset        = GS101_GATE_DBG_OFFSET,
+	.option_offset		= PERIC1_CMU_PERIC1_CONTROLLER_OPTION,
+	.drcg_offset		= GS101_DRCG_EN_OFFSET,
 };
 
 /* ---- platform_driver ----------------------------------------------------- */

-- 
2.52.0.rc1.455.g30608eb744-goog

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help