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2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d 
 kernel/drivers/clk/mediatek/clk-mt6797.c
....@@ -1,15 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Copyright (c) 2016 MediaTek Inc.
34  * Author: Kevin Chen <kevin-cw.chen@mediatek.com>
4
- *
5
- * This program is free software; you can redistribute it and/or modify
6
- * it under the terms of the GNU General Public License version 2 as
7
- * published by the Free Software Foundation.
8
- *
9
- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
11
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12
- * GNU General Public License for more details.
135  */
146 
157 #include <linux/of.h>
....@@ -324,6 +316,10 @@
324316 	"univpll_d5",
325317 };
326318 
319
+/*
320
+ * Clock mux ddrphycfg is needed by the DRAM controller. We mark it as
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+ * critical as otherwise the system will hang after boot.
322
+ */
327323 static const struct mtk_composite top_muxes[] = {
328324 	MUX(CLK_TOP_MUX_ULPOSC_AXI_CK_MUX_PRE, "ulposc_axi_ck_mux_pre",
329325 	    ulposc_axi_ck_mux_pre_parents, 0x0040, 3, 1),
....@@ -331,8 +327,8 @@
331327 	    ulposc_axi_ck_mux_parents, 0x0040, 2, 1),
332328 	MUX(CLK_TOP_MUX_AXI, "axi_sel", axi_parents,
333329 	    0x0040, 0, 2),
334
-	MUX(CLK_TOP_MUX_DDRPHYCFG, "ddrphycfg_sel", ddrphycfg_parents,
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-	    0x0040, 16, 2),
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+	MUX_FLAGS(CLK_TOP_MUX_DDRPHYCFG, "ddrphycfg_sel", ddrphycfg_parents,
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+		  0x0040, 16, 2, CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
336332 	MUX(CLK_TOP_MUX_MM, "mm_sel", mm_parents,
337333 	    0x0040, 24, 2),
338334 	MUX_GATE(CLK_TOP_MUX_PWM, "pwm_sel", pwm_parents, 0x0050, 0, 3, 7),
....@@ -389,9 +385,8 @@
389385 	struct clk_onecell_data *clk_data;
390386 	void __iomem *base;
391387 	struct device_node *node = pdev->dev.of_node;
392
-	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
393388 
394
-	base = devm_ioremap_resource(&pdev->dev, res);
389
+	base = devm_platform_ioremap_resource(pdev, 0);
395390 	if (IS_ERR(base))
396391 		return PTR_ERR(base);
397392 
....@@ -424,33 +419,45 @@
424419 	.sta_ofs = 0x00b0,
425420 };
426421 
427
-#define GATE_ICG0(_id, _name, _parent, _shift) {	\
428
-	.id = _id,					\
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-	.name = _name,					\
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-	.parent_name = _parent,				\
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-	.regs = &infra0_cg_regs,			\
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-	.shift = _shift,				\
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-	.ops = &mtk_clk_gate_ops_setclr,		\
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+#define GATE_ICG0(_id, _name, _parent, _shift) {		\
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+	.id = _id,						\
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+	.name = _name,						\
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+	.parent_name = _parent,					\
426
+	.regs = &infra0_cg_regs,				\
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+	.shift = _shift,					\
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+	.ops = &mtk_clk_gate_ops_setclr,			\
434429 }
435430 
436
-#define GATE_ICG1(_id, _name, _parent, _shift) {	\
437
-	.id = _id,					\
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-	.name = _name,					\
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-	.parent_name = _parent,				\
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-	.regs = &infra1_cg_regs,			\
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-	.shift = _shift,				\
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-	.ops = &mtk_clk_gate_ops_setclr,		\
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+#define GATE_ICG1(_id, _name, _parent, _shift)			\
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+	GATE_ICG1_FLAGS(_id, _name, _parent, _shift, 0)
433
+
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+#define GATE_ICG1_FLAGS(_id, _name, _parent, _shift, _flags) {	\
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+	.id = _id,						\
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+	.name = _name,						\
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+	.parent_name = _parent,					\
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+	.regs = &infra1_cg_regs,				\
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+	.shift = _shift,					\
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+	.ops = &mtk_clk_gate_ops_setclr,			\
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+	.flags = _flags,					\
443442 }
444443 
445
-#define GATE_ICG2(_id, _name, _parent, _shift) {	\
446
-	.id = _id,					\
447
-	.name = _name,					\
448
-	.parent_name = _parent,				\
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-	.regs = &infra2_cg_regs,			\
450
-	.shift = _shift,				\
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-	.ops = &mtk_clk_gate_ops_setclr,		\
444
+#define GATE_ICG2(_id, _name, _parent, _shift)			\
445
+	GATE_ICG2_FLAGS(_id, _name, _parent, _shift, 0)
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+
447
+#define GATE_ICG2_FLAGS(_id, _name, _parent, _shift, _flags) {	\
448
+	.id = _id,						\
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+	.name = _name,						\
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+	.parent_name = _parent,					\
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+	.regs = &infra2_cg_regs,				\
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+	.shift = _shift,					\
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+	.ops = &mtk_clk_gate_ops_setclr,			\
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+	.flags = _flags,					\
452455 }
453456 
457
+/*
458
+ * Clock gates dramc and dramc_b are needed by the DRAM controller.
459
+ * We mark them as critical as otherwise the system will hang after boot.
460
+ */
454461 static const struct mtk_gate infra_clks[] = {
455462 	GATE_ICG0(CLK_INFRA_PMIC_TMR, "infra_pmic_tmr", "ulposc", 0),
456463 	GATE_ICG0(CLK_INFRA_PMIC_AP, "infra_pmic_ap", "pmicspi_sel", 1),
....@@ -505,7 +512,8 @@
505512 	GATE_ICG1(CLK_INFRA_CCIF_AP, "infra_ccif_ap", "axi_sel", 23),
506513 	GATE_ICG1(CLK_INFRA_AUDIO, "infra_audio", "axi_sel", 25),
507514 	GATE_ICG1(CLK_INFRA_CCIF_MD, "infra_ccif_md", "axi_sel", 26),
508
-	GATE_ICG1(CLK_INFRA_DRAMC_F26M, "infra_dramc_f26m", "clk26m", 31),
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+	GATE_ICG1_FLAGS(CLK_INFRA_DRAMC_F26M, "infra_dramc_f26m",
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+			"clk26m", 31, CLK_IS_CRITICAL),
509517 	GATE_ICG2(CLK_INFRA_I2C4, "infra_i2c4", "axi_sel", 0),
510518 	GATE_ICG2(CLK_INFRA_I2C_APPM, "infra_i2c_appm", "axi_sel", 1),
511519 	GATE_ICG2(CLK_INFRA_I2C_GPUPM, "infra_i2c_gpupm", "axi_sel", 2),
....@@ -516,7 +524,8 @@
516524 	GATE_ICG2(CLK_INFRA_I2C5, "infra_i2c5", "axi_sel", 7),
517525 	GATE_ICG2(CLK_INFRA_SYS_CIRQ, "infra_sys_cirq", "axi_sel", 8),
518526 	GATE_ICG2(CLK_INFRA_SPI1, "infra_spi1", "spi_sel", 10),
519
-	GATE_ICG2(CLK_INFRA_DRAMC_B_F26M, "infra_dramc_b_f26m", "clk26m", 11),
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+	GATE_ICG2_FLAGS(CLK_INFRA_DRAMC_B_F26M, "infra_dramc_b_f26m",
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+			"clk26m", 11, CLK_IS_CRITICAL),
520529 	GATE_ICG2(CLK_INFRA_ANC_MD32, "infra_anc_md32", "anc_md32_sel", 12),
521530 	GATE_ICG2(CLK_INFRA_ANC_MD32_32K, "infra_anc_md32_32k", "clk26m", 13),
522531 	GATE_ICG2(CLK_INFRA_DVFS_SPM1, "infra_dvfs_spm1", "axi_sel", 15),
....@@ -573,7 +582,7 @@
573582 
574583 static int mtk_infrasys_init(struct platform_device *pdev)
575584 {
576
-	int r, i;
585
+	int i;
577586 	struct device_node *node = pdev->dev.of_node;
578587 
579588 	if (!infra_clk_data) {
....@@ -590,11 +599,7 @@
590599 	mtk_clk_register_factors(infra_fixed_divs, ARRAY_SIZE(infra_fixed_divs),
591600 				 infra_clk_data);
592601 
593
-	r = of_clk_add_provider(node, of_clk_src_onecell_get, infra_clk_data);
594
-	if (r)
595
-		return r;
596
-
597
-	return 0;
602
+	return of_clk_add_provider(node, of_clk_src_onecell_get, infra_clk_data);
598603 }
599604 
600605 #define MT6797_PLL_FMAX		(3000UL * MHZ)