1 files changed, 69 insertions, 99 deletions

diff --git a/drivers/clk/socfpga/clk-gate.c b/drivers/clk/socfpga/clk-gate.c
index aa7a6e6a15b6..0a5a95e0267f 100644
--- a/drivers/clk/socfpga/clk-gate.c
+++ b/drivers/clk/socfpga/clk-gate.c
@@ -1,19 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright 2011-2012 Calxeda, Inc.
  *  Copyright (C) 2012-2013 Altera Corporation <www.altera.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  * Based from clk-highbank.c
- *
  */
 #include <linux/slab.h>
 #include <linux/clk-provider.h>
@@ -40,22 +30,23 @@ static u8 socfpga_clk_get_parent(struct clk_hw *hwclk)
 {
 	u32 l4_src;
 	u32 perpll_src;
+	const char *name = clk_hw_get_name(hwclk);
 
-	if (streq(hwclk->init->name, SOCFPGA_L4_MP_CLK)) {
+	if (streq(name, SOCFPGA_L4_MP_CLK)) {
 		l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
-		return l4_src &= 0x1;
+		return l4_src & 0x1;
 	}
-	if (streq(hwclk->init->name, SOCFPGA_L4_SP_CLK)) {
+	if (streq(name, SOCFPGA_L4_SP_CLK)) {
 		l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
 		return !!(l4_src & 2);
 	}
 
 	perpll_src = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
-	if (streq(hwclk->init->name, SOCFPGA_MMC_CLK))
-		return perpll_src &= 0x3;
-	if (streq(hwclk->init->name, SOCFPGA_NAND_CLK) ||
-			streq(hwclk->init->name, SOCFPGA_NAND_X_CLK))
-			return (perpll_src >> 2) & 3;
+	if (streq(name, SOCFPGA_MMC_CLK))
+		return perpll_src & 0x3;
+	if (streq(name, SOCFPGA_NAND_CLK) ||
+	    streq(name, SOCFPGA_NAND_X_CLK))
+		return (perpll_src >> 2) & 3;
 
 	/* QSPI clock */
 	return (perpll_src >> 4) & 3;
@@ -65,24 +56,25 @@ static u8 socfpga_clk_get_parent(struct clk_hw *hwclk)
 static int socfpga_clk_set_parent(struct clk_hw *hwclk, u8 parent)
 {
 	u32 src_reg;
+	const char *name = clk_hw_get_name(hwclk);
 
-	if (streq(hwclk->init->name, SOCFPGA_L4_MP_CLK)) {
+	if (streq(name, SOCFPGA_L4_MP_CLK)) {
 		src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
 		src_reg &= ~0x1;
 		src_reg |= parent;
 		writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC);
-	} else if (streq(hwclk->init->name, SOCFPGA_L4_SP_CLK)) {
+	} else if (streq(name, SOCFPGA_L4_SP_CLK)) {
 		src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
 		src_reg &= ~0x2;
 		src_reg |= (parent << 1);
 		writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC);
 	} else {
 		src_reg = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
-		if (streq(hwclk->init->name, SOCFPGA_MMC_CLK)) {
+		if (streq(name, SOCFPGA_MMC_CLK)) {
 			src_reg &= ~0x3;
 			src_reg |= parent;
-		} else if (streq(hwclk->init->name, SOCFPGA_NAND_CLK) ||
-			streq(hwclk->init->name, SOCFPGA_NAND_X_CLK)) {
+		} else if (streq(name, SOCFPGA_NAND_CLK) ||
+			streq(name, SOCFPGA_NAND_X_CLK)) {
 			src_reg &= ~0xC;
 			src_reg |= (parent << 2);
 		} else {/* QSPI clock */
@@ -95,10 +87,8 @@ static int socfpga_clk_set_parent(struct clk_hw *hwclk, u8 parent)
 	return 0;
 }
 
-static unsigned long socfpga_clk_recalc_rate(struct clk_hw *hwclk,
-	unsigned long parent_rate)
+static u32 socfpga_clk_get_div(struct socfpga_gate_clk *socfpgaclk)
 {
-	struct socfpga_gate_clk *socfpgaclk = to_socfpga_gate_clk(hwclk);
 	u32 div = 1, val;
 
 	if (socfpgaclk->fixed_div)
@@ -107,93 +97,64 @@ static unsigned long socfpga_clk_recalc_rate(struct clk_hw *hwclk,
 		val = readl(socfpgaclk->div_reg) >> socfpgaclk->shift;
 		val &= GENMASK(socfpgaclk->width - 1, 0);
 		/* Check for GPIO_DB_CLK by its offset */
-		if ((int) socfpgaclk->div_reg & SOCFPGA_GPIO_DB_CLK_OFFSET)
+		if ((uintptr_t) socfpgaclk->div_reg & SOCFPGA_GPIO_DB_CLK_OFFSET)
 			div = val + 1;
 		else
 			div = (1 << val);
 	}
 
+	return div;
+}
+
+static unsigned long socfpga_clk_recalc_rate(struct clk_hw *hwclk,
+					     unsigned long parent_rate)
+{
+	struct socfpga_gate_clk *socfpgaclk = to_socfpga_gate_clk(hwclk);
+	u32 div = socfpga_clk_get_div(socfpgaclk);
+
 	return parent_rate / div;
 }
 
-static int socfpga_clk_prepare(struct clk_hw *hwclk)
+
+static int socfpga_clk_determine_rate(struct clk_hw *hwclk,
+				      struct clk_rate_request *req)
 {
 	struct socfpga_gate_clk *socfpgaclk = to_socfpga_gate_clk(hwclk);
-	struct regmap *sys_mgr_base_addr;
-	int i;
-	u32 hs_timing;
-	u32 clk_phase[2];
-
-	if (socfpgaclk->clk_phase[0] || socfpgaclk->clk_phase[1]) {
-		sys_mgr_base_addr = syscon_regmap_lookup_by_compatible("altr,sys-mgr");
-		if (IS_ERR(sys_mgr_base_addr)) {
-			pr_err("%s: failed to find altr,sys-mgr regmap!\n", __func__);
-			return -EINVAL;
-		}
+	u32 div = socfpga_clk_get_div(socfpgaclk);
+
+	req->rate = req->best_parent_rate / div;
 
-		for (i = 0; i < 2; i++) {
-			switch (socfpgaclk->clk_phase[i]) {
-			case 0:
-				clk_phase[i] = 0;
-				break;
-			case 45:
-				clk_phase[i] = 1;
-				break;
-			case 90:
-				clk_phase[i] = 2;
-				break;
-			case 135:
-				clk_phase[i] = 3;
-				break;
-			case 180:
-				clk_phase[i] = 4;
-				break;
-			case 225:
-				clk_phase[i] = 5;
-				break;
-			case 270:
-				clk_phase[i] = 6;
-				break;
-			case 315:
-				clk_phase[i] = 7;
-				break;
-			default:
-				clk_phase[i] = 0;
-				break;
-			}
-		}
-		hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1]);
-		regmap_write(sys_mgr_base_addr, SYSMGR_SDMMCGRP_CTRL_OFFSET,
-			hs_timing);
-	}
 	return 0;
 }
 
 static struct clk_ops gateclk_ops = {
-	.prepare = socfpga_clk_prepare,
 	.recalc_rate = socfpga_clk_recalc_rate,
+	.determine_rate = socfpga_clk_determine_rate,
 	.get_parent = socfpga_clk_get_parent,
 	.set_parent = socfpga_clk_set_parent,
 };
 
-static void __init __socfpga_gate_init(struct device_node *node,
-	const struct clk_ops *ops)
+void __init socfpga_gate_init(struct device_node *node)
 {
 	u32 clk_gate[2];
 	u32 div_reg[3];
-	u32 clk_phase[2];
 	u32 fixed_div;
-	struct clk *clk;
+	struct clk_hw *hw_clk;
 	struct socfpga_gate_clk *socfpga_clk;
 	const char *clk_name = node->name;
 	const char *parent_name[SOCFPGA_MAX_PARENTS];
 	struct clk_init_data init;
+	struct clk_ops *ops;
 	int rc;
 
 	socfpga_clk = kzalloc(sizeof(*socfpga_clk), GFP_KERNEL);
 	if (WARN_ON(!socfpga_clk))
 		return;
 
+	ops = kmemdup(&gateclk_ops, sizeof(gateclk_ops), GFP_KERNEL);
+	if (WARN_ON(!ops))
+		goto err_kmemdup;
+
 	rc = of_property_read_u32_array(node, "clk-gate", clk_gate, 2);
 	if (rc)
 		clk_gate[0] = 0;
@@ -202,8 +163,8 @@ static void __init __socfpga_gate_init(struct device_node *node,
 		socfpga_clk->hw.reg = clk_mgr_base_addr + clk_gate[0];
 		socfpga_clk->hw.bit_idx = clk_gate[1];
 
-		gateclk_ops.enable = clk_gate_ops.enable;
-		gateclk_ops.disable = clk_gate_ops.disable;
+		ops->enable = clk_gate_ops.enable;
+		ops->disable = clk_gate_ops.disable;
 	}
 
 	rc = of_property_read_u32(node, "fixed-divider", &fixed_div);
@@ -221,12 +182,6 @@ static void __init __socfpga_gate_init(struct device_node *node,
 		socfpga_clk->div_reg = NULL;
 	}
 
-	rc = of_property_read_u32_array(node, "clk-phase", clk_phase, 2);
-	if (!rc) {
-		socfpga_clk->clk_phase[0] = clk_phase[0];
-		socfpga_clk->clk_phase[1] = clk_phase[1];
-	}
-
 	of_property_read_string(node, "clock-output-names", &clk_name);
 
 	init.name = clk_name;
@@ -234,20 +189,35 @@ static void __init __socfpga_gate_init(struct device_node *node,
 	init.flags = 0;
 
 	init.num_parents = of_clk_parent_fill(node, parent_name, SOCFPGA_MAX_PARENTS);
+	if (init.num_parents < 2) {
+		ops->get_parent = NULL;
+		ops->set_parent = NULL;
+	}
+
 	init.parent_names = parent_name;
 	socfpga_clk->hw.hw.init = &init;
 
-	clk = clk_register(NULL, &socfpga_clk->hw.hw);
-	if (WARN_ON(IS_ERR(clk))) {
-		kfree(socfpga_clk);
-		return;
+	hw_clk = &socfpga_clk->hw.hw;
+
+	rc = clk_hw_register(NULL, hw_clk);
+	if (rc) {
+		pr_err("Could not register clock:%s\n", clk_name);
+		goto err_clk_hw_register;
 	}
-	rc = of_clk_add_provider(node, of_clk_src_simple_get, clk);
-	if (WARN_ON(rc))
-		return;
-}
 
-void __init socfpga_gate_init(struct device_node *node)
-{
-	__socfpga_gate_init(node, &gateclk_ops);
+	rc = of_clk_add_hw_provider(node, of_clk_hw_simple_get, hw_clk);
+	if (rc) {
+		pr_err("Could not register clock provider for node:%s\n",
+		       clk_name);
+		goto err_of_clk_add_hw_provider;
+	}
+
+	return;
+
+err_of_clk_add_hw_provider:
+	clk_hw_unregister(hw_clk);
+err_clk_hw_register:
+	kfree(ops);
+err_kmemdup:
+	kfree(socfpga_clk);
 }