From:   Sam Protsenko <semen.protsenko@linaro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Chanwoo Choi <cw00.choi@samsung.com>,
        Sylwester Nawrocki <s.nawrocki@samsung.com>,
        Rob Herring <robh+dt@kernel.org>
Cc:     David Virag <virag.david003@gmail.com>,
        Chanho Park <chanho61.park@samsung.com>,
        Alim Akhtar <alim.akhtar@samsung.com>,
        Sumit Semwal <sumit.semwal@linaro.org>,
        Tomasz Figa <tomasz.figa@gmail.com>,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH 4/6] clk: samsung: exynos850: Implement CMU_G3D domain
Date:   Sat, 11 Feb 2023 00:40:04 -0600
Message-Id: <20230211064006.14981-5-semen.protsenko@linaro.org>
In-Reply-To: <20230211064006.14981-1-semen.protsenko@linaro.org>
References: <20230211064006.14981-1-semen.protsenko@linaro.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

CMU_G3D clock domain provides clocks for Mali-G52 GPU and bus clocks for
BLK_G3D.

This patch adds next clocks:
  - bus clocks in CMU_TOP for CMU_G3D
  - all internal CMU_G3D clocks
  - leaf clocks for GPU, TZPC (TrustZone Protection Controller) and
    SysReg

G3D_CMU_G3D clock was marked as CLK_IGNORE_UNUSED, as system hangs on
boot otherwise.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
---
 drivers/clk/samsung/clk-exynos850.c | 121 ++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)

diff --git a/drivers/clk/samsung/clk-exynos850.c b/drivers/clk/samsung/clk-exynos850.c
index 541761e96aeb..a24eff42baae 100644
--- a/drivers/clk/samsung/clk-exynos850.c
+++ b/drivers/clk/samsung/clk-exynos850.c
@@ -36,6 +36,7 @@
 #define CLK_CON_MUX_MUX_CLKCMU_CORE_MMC_EMBD	0x101c
 #define CLK_CON_MUX_MUX_CLKCMU_CORE_SSS		0x1020
 #define CLK_CON_MUX_MUX_CLKCMU_DPU		0x1034
+#define CLK_CON_MUX_MUX_CLKCMU_G3D_SWITCH	0x1038
 #define CLK_CON_MUX_MUX_CLKCMU_HSI_BUS		0x103c
 #define CLK_CON_MUX_MUX_CLKCMU_HSI_MMC_CARD	0x1040
 #define CLK_CON_MUX_MUX_CLKCMU_HSI_USB20DRD	0x1044
@@ -57,6 +58,7 @@
 #define CLK_CON_DIV_CLKCMU_CORE_MMC_EMBD	0x1828
 #define CLK_CON_DIV_CLKCMU_CORE_SSS		0x182c
 #define CLK_CON_DIV_CLKCMU_DPU			0x1840
+#define CLK_CON_DIV_CLKCMU_G3D_SWITCH		0x1844
 #define CLK_CON_DIV_CLKCMU_HSI_BUS		0x1848
 #define CLK_CON_DIV_CLKCMU_HSI_MMC_CARD		0x184c
 #define CLK_CON_DIV_CLKCMU_HSI_USB20DRD		0x1850
@@ -84,6 +86,7 @@
 #define CLK_CON_GAT_GATE_CLKCMU_CORE_MMC_EMBD	0x2024
 #define CLK_CON_GAT_GATE_CLKCMU_CORE_SSS	0x2028
 #define CLK_CON_GAT_GATE_CLKCMU_DPU		0x203c
+#define CLK_CON_GAT_GATE_CLKCMU_G3D_SWITCH	0x2040
 #define CLK_CON_GAT_GATE_CLKCMU_HSI_BUS		0x2044
 #define CLK_CON_GAT_GATE_CLKCMU_HSI_MMC_CARD	0x2048
 #define CLK_CON_GAT_GATE_CLKCMU_HSI_USB20DRD	0x204c
@@ -116,6 +119,7 @@ static const unsigned long top_clk_regs[] __initconst = {
 	CLK_CON_MUX_MUX_CLKCMU_CORE_MMC_EMBD,
 	CLK_CON_MUX_MUX_CLKCMU_CORE_SSS,
 	CLK_CON_MUX_MUX_CLKCMU_DPU,
+	CLK_CON_MUX_MUX_CLKCMU_G3D_SWITCH,
 	CLK_CON_MUX_MUX_CLKCMU_HSI_BUS,
 	CLK_CON_MUX_MUX_CLKCMU_HSI_MMC_CARD,
 	CLK_CON_MUX_MUX_CLKCMU_HSI_USB20DRD,
@@ -137,6 +141,7 @@ static const unsigned long top_clk_regs[] __initconst = {
 	CLK_CON_DIV_CLKCMU_CORE_MMC_EMBD,
 	CLK_CON_DIV_CLKCMU_CORE_SSS,
 	CLK_CON_DIV_CLKCMU_DPU,
+	CLK_CON_DIV_CLKCMU_G3D_SWITCH,
 	CLK_CON_DIV_CLKCMU_HSI_BUS,
 	CLK_CON_DIV_CLKCMU_HSI_MMC_CARD,
 	CLK_CON_DIV_CLKCMU_HSI_USB20DRD,
@@ -164,6 +169,7 @@ static const unsigned long top_clk_regs[] __initconst = {
 	CLK_CON_GAT_GATE_CLKCMU_CORE_MMC_EMBD,
 	CLK_CON_GAT_GATE_CLKCMU_CORE_SSS,
 	CLK_CON_GAT_GATE_CLKCMU_DPU,
+	CLK_CON_GAT_GATE_CLKCMU_G3D_SWITCH,
 	CLK_CON_GAT_GATE_CLKCMU_HSI_BUS,
 	CLK_CON_GAT_GATE_CLKCMU_HSI_MMC_CARD,
 	CLK_CON_GAT_GATE_CLKCMU_HSI_USB20DRD,
@@ -216,6 +222,9 @@ PNAME(mout_core_mmc_embd_p)	= { "oscclk", "dout_shared0_div2",
 				    "oscclk", "oscclk" };
 PNAME(mout_core_sss_p)		= { "dout_shared0_div3", "dout_shared1_div3",
 				    "dout_shared0_div4", "dout_shared1_div4" };
+/* List of parent clocks for Muxes in CMU_TOP: for CMU_G3D */
+PNAME(mout_g3d_switch_p)	= { "dout_shared0_div2", "dout_shared1_div2",
+				    "dout_shared0_div3", "dout_shared1_div3" };
 /* List of parent clocks for Muxes in CMU_TOP: for CMU_HSI */
 PNAME(mout_hsi_bus_p)		= { "dout_shared0_div2", "dout_shared1_div2" };
 PNAME(mout_hsi_mmc_card_p)	= { "oscclk", "dout_shared0_div2",
@@ -283,6 +292,10 @@ static const struct samsung_mux_clock top_mux_clks[] __initconst = {
 	MUX(CLK_MOUT_DPU, "mout_dpu", mout_dpu_p,
 	    CLK_CON_MUX_MUX_CLKCMU_DPU, 0, 2),
 
+	/* G3D */
+	MUX(CLK_MOUT_G3D_SWITCH, "mout_g3d_switch", mout_g3d_switch_p,
+	    CLK_CON_MUX_MUX_CLKCMU_G3D_SWITCH, 0, 2),
+
 	/* HSI */
 	MUX(CLK_MOUT_HSI_BUS, "mout_hsi_bus", mout_hsi_bus_p,
 	    CLK_CON_MUX_MUX_CLKCMU_HSI_BUS, 0, 1),
@@ -357,6 +370,10 @@ static const struct samsung_div_clock top_div_clks[] __initconst = {
 	DIV(CLK_DOUT_DPU, "dout_dpu", "gout_dpu",
 	    CLK_CON_DIV_CLKCMU_DPU, 0, 4),
 
+	/* G3D */
+	DIV(CLK_DOUT_G3D_SWITCH, "dout_g3d_switch", "gout_g3d_switch",
+	    CLK_CON_DIV_CLKCMU_G3D_SWITCH, 0, 3),
+
 	/* HSI */
 	DIV(CLK_DOUT_HSI_BUS, "dout_hsi_bus", "gout_hsi_bus",
 	    CLK_CON_DIV_CLKCMU_HSI_BUS, 0, 4),
@@ -417,6 +434,10 @@ static const struct samsung_gate_clock top_gate_clks[] __initconst = {
 	GATE(CLK_GOUT_DPU, "gout_dpu", "mout_dpu",
 	     CLK_CON_GAT_GATE_CLKCMU_DPU, 21, 0, 0),
 
+	/* G3D */
+	GATE(CLK_GOUT_G3D_SWITCH, "gout_g3d_switch", "mout_g3d_switch",
+	     CLK_CON_GAT_GATE_CLKCMU_G3D_SWITCH, 21, 0, 0),
+
 	/* HSI */
 	GATE(CLK_GOUT_HSI_BUS, "gout_hsi_bus", "mout_hsi_bus",
 	     CLK_CON_GAT_GATE_CLKCMU_HSI_BUS, 21, 0, 0),
@@ -992,6 +1013,103 @@ static const struct samsung_cmu_info cmgp_cmu_info __initconst = {
 	.clk_name		= "gout_clkcmu_cmgp_bus",
 };
 
+/* ---- CMU_G3D ------------------------------------------------------------- */
+
+/* Register Offset definitions for CMU_G3D (0x11400000) */
+#define PLL_LOCKTIME_PLL_G3D			0x0000
+#define PLL_CON0_PLL_G3D			0x0100
+#define PLL_CON3_PLL_G3D			0x010c
+#define PLL_CON0_MUX_CLKCMU_G3D_SWITCH_USER	0x0600
+#define CLK_CON_MUX_MUX_CLK_G3D_BUSD		0x1000
+#define CLK_CON_DIV_DIV_CLK_G3D_BUSP		0x1804
+#define CLK_CON_GAT_CLK_G3D_CMU_G3D_PCLK	0x2000
+#define CLK_CON_GAT_CLK_G3D_GPU_CLK		0x2004
+#define CLK_CON_GAT_GOUT_G3D_TZPC_PCLK		0x200c
+#define CLK_CON_GAT_GOUT_G3D_GRAY2BIN_CLK	0x2010
+#define CLK_CON_GAT_GOUT_G3D_BUSD_CLK		0x2024
+#define CLK_CON_GAT_GOUT_G3D_BUSP_CLK		0x2028
+#define CLK_CON_GAT_GOUT_G3D_SYSREG_PCLK	0x202c
+
+
+static const unsigned long g3d_clk_regs[] __initconst = {
+	PLL_LOCKTIME_PLL_G3D,
+	PLL_CON0_PLL_G3D,
+	PLL_CON3_PLL_G3D,
+	PLL_CON0_MUX_CLKCMU_G3D_SWITCH_USER,
+	CLK_CON_MUX_MUX_CLK_G3D_BUSD,
+	CLK_CON_DIV_DIV_CLK_G3D_BUSP,
+	CLK_CON_GAT_CLK_G3D_CMU_G3D_PCLK,
+	CLK_CON_GAT_CLK_G3D_GPU_CLK,
+	CLK_CON_GAT_GOUT_G3D_TZPC_PCLK,
+	CLK_CON_GAT_GOUT_G3D_GRAY2BIN_CLK,
+	CLK_CON_GAT_GOUT_G3D_BUSD_CLK,
+	CLK_CON_GAT_GOUT_G3D_BUSP_CLK,
+	CLK_CON_GAT_GOUT_G3D_SYSREG_PCLK,
+};
+
+/* List of parent clocks for Muxes in CMU_G3D */
+PNAME(mout_g3d_pll_p)		= { "oscclk", "fout_g3d_pll" };
+PNAME(mout_g3d_switch_user_p)	= { "oscclk", "dout_g3d_switch" };
+PNAME(mout_g3d_busd_p)		= { "mout_g3d_pll", "mout_g3d_switch_user" };
+
+/*
+ * Do not provide PLL table to PLL_G3D, as MANUAL_PLL_CTRL bit is not set
+ * for that PLL by default, so set_rate operation would fail.
+ */
+static const struct samsung_pll_clock g3d_pll_clks[] __initconst = {
+	PLL(pll_0818x, CLK_FOUT_G3D_PLL, "fout_g3d_pll", "oscclk",
+	    PLL_LOCKTIME_PLL_G3D, PLL_CON3_PLL_G3D, NULL),
+};
+
+static const struct samsung_mux_clock g3d_mux_clks[] __initconst = {
+	MUX(CLK_MOUT_G3D_PLL, "mout_g3d_pll", mout_g3d_pll_p,
+	    PLL_CON0_PLL_G3D, 4, 1),
+	MUX(CLK_MOUT_G3D_SWITCH_USER, "mout_g3d_switch_user",
+	    mout_g3d_switch_user_p,
+	    PLL_CON0_MUX_CLKCMU_G3D_SWITCH_USER, 4, 1),
+	MUX(CLK_MOUT_G3D_BUSD, "mout_g3d_busd", mout_g3d_busd_p,
+	    CLK_CON_MUX_MUX_CLK_G3D_BUSD, 0, 1),
+};
+
+static const struct samsung_div_clock g3d_div_clks[] __initconst = {
+	DIV(CLK_DOUT_G3D_BUSP, "dout_g3d_busp", "mout_g3d_busd",
+	    CLK_CON_DIV_DIV_CLK_G3D_BUSP, 0, 3),
+};
+
+static const struct samsung_gate_clock g3d_gate_clks[] __initconst = {
+	GATE(CLK_GOUT_G3D_CMU_G3D_PCLK, "gout_g3d_cmu_g3d_pclk",
+	     "dout_g3d_busp",
+	     CLK_CON_GAT_CLK_G3D_CMU_G3D_PCLK, 21, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_GOUT_G3D_GPU_CLK, "gout_g3d_gpu_clk", "mout_g3d_busd",
+	     CLK_CON_GAT_CLK_G3D_GPU_CLK, 21, 0, 0),
+	GATE(CLK_GOUT_G3D_TZPC_PCLK, "gout_g3d_tzpc_pclk", "dout_g3d_busp",
+	     CLK_CON_GAT_GOUT_G3D_TZPC_PCLK, 21, 0, 0),
+	GATE(CLK_GOUT_G3D_GRAY2BIN_CLK, "gout_g3d_gray2bin_clk",
+	     "mout_g3d_busd",
+	     CLK_CON_GAT_GOUT_G3D_GRAY2BIN_CLK, 21, 0, 0),
+	GATE(CLK_GOUT_G3D_BUSD_CLK, "gout_g3d_busd_clk", "mout_g3d_busd",
+	     CLK_CON_GAT_GOUT_G3D_BUSD_CLK, 21, 0, 0),
+	GATE(CLK_GOUT_G3D_BUSP_CLK, "gout_g3d_busp_clk", "dout_g3d_busp",
+	     CLK_CON_GAT_GOUT_G3D_BUSP_CLK, 21, 0, 0),
+	GATE(CLK_GOUT_G3D_SYSREG_PCLK, "gout_g3d_sysreg_pclk", "dout_g3d_busp",
+	     CLK_CON_GAT_GOUT_G3D_SYSREG_PCLK, 21, 0, 0),
+};
+
+static const struct samsung_cmu_info g3d_cmu_info __initconst = {
+	.pll_clks		= g3d_pll_clks,
+	.nr_pll_clks		= ARRAY_SIZE(g3d_pll_clks),
+	.mux_clks		= g3d_mux_clks,
+	.nr_mux_clks		= ARRAY_SIZE(g3d_mux_clks),
+	.div_clks		= g3d_div_clks,
+	.nr_div_clks		= ARRAY_SIZE(g3d_div_clks),
+	.gate_clks		= g3d_gate_clks,
+	.nr_gate_clks		= ARRAY_SIZE(g3d_gate_clks),
+	.nr_clk_ids		= G3D_NR_CLK,
+	.clk_regs		= g3d_clk_regs,
+	.nr_clk_regs		= ARRAY_SIZE(g3d_clk_regs),
+	.clk_name		= "dout_g3d_switch",
+};
+
 /* ---- CMU_HSI ------------------------------------------------------------- */
 
 /* Register Offset definitions for CMU_HSI (0x13400000) */
@@ -1700,6 +1818,9 @@ static const struct of_device_id exynos850_cmu_of_match[] = {
 	}, {
 		.compatible = "samsung,exynos850-cmu-cmgp",
 		.data = &cmgp_cmu_info,
+	}, {
+		.compatible = "samsung,exynos850-cmu-g3d",
+		.data = &g3d_cmu_info,
 	}, {
 		.compatible = "samsung,exynos850-cmu-hsi",
 		.data = &hsi_cmu_info,
-- 
2.39.1