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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/drivers/memory/emif.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * EMIF driver
34  *
....@@ -5,10 +6,6 @@
56  *
67  * Aneesh V <aneesh@ti.com>
78  * Santosh Shilimkar <santosh.shilimkar@ti.com>
8
- *
9
- * This program is free software; you can redistribute it and/or modify
10
- * it under the terms of the GNU General Public License version 2 as
11
- * published by the Free Software Foundation.
129  */
1310 #include <linux/err.h>
1411 #include <linux/kernel.h>
....@@ -26,8 +23,9 @@
2623 #include <linux/list.h>
2724 #include <linux/spinlock.h>
2825 #include <linux/pm.h>
29
-#include <memory/jedec_ddr.h>
26
+
3027 #include "emif.h"
28
+#include "jedec_ddr.h"
3129 #include "of_memory.h"
3230 
3331 /**
....@@ -133,16 +131,7 @@
133131 	return 0;
134132 }
135133 
136
-static int emif_regdump_open(struct inode *inode, struct file *file)
137
-{
138
-	return single_open(file, emif_regdump_show, inode->i_private);
139
-}
140
-
141
-static const struct file_operations emif_regdump_fops = {
142
-	.open			= emif_regdump_open,
143
-	.read			= seq_read,
144
-	.release		= single_release,
145
-};
134
+DEFINE_SHOW_ATTRIBUTE(emif_regdump);
146135 
147136 static int emif_mr4_show(struct seq_file *s, void *unused)
148137 {
....@@ -152,16 +141,7 @@
152141 	return 0;
153142 }
154143 
155
-static int emif_mr4_open(struct inode *inode, struct file *file)
156
-{
157
-	return single_open(file, emif_mr4_show, inode->i_private);
158
-}
159
-
160
-static const struct file_operations emif_mr4_fops = {
161
-	.open			= emif_mr4_open,
162
-	.read			= seq_read,
163
-	.release		= single_release,
164
-};
144
+DEFINE_SHOW_ATTRIBUTE(emif_mr4);
165145 
166146 static int __init_or_module emif_debugfs_init(struct emif_data *emif)
167147 {
....@@ -261,10 +241,9 @@
261241 	 * the EMIF_PWR_MGMT_CTRL[10:8] REG_LP_MODE bit field to 0x4.
262242 	 */
263243 	if ((emif->plat_data->ip_rev == EMIF_4D) &&
264
-	    (EMIF_LP_MODE_PWR_DN == lpmode)) {
244
+	    (lpmode == EMIF_LP_MODE_PWR_DN)) {
265245 		WARN_ONCE(1,
266
-			  "REG_LP_MODE = LP_MODE_PWR_DN(4) is prohibited by"
267
-			  "erratum i743 switch to LP_MODE_SELF_REFRESH(2)\n");
246
+			  "REG_LP_MODE = LP_MODE_PWR_DN(4) is prohibited by erratum i743 switch to LP_MODE_SELF_REFRESH(2)\n");
268247 		/* rollback LP_MODE to Self-refresh mode */
269248 		lpmode = EMIF_LP_MODE_SELF_REFRESH;
270249 	}
....@@ -693,7 +672,7 @@
693672 	u32 fifo_we_slave_ratio;
694673 
695674 	fifo_we_slave_ratio =  DIV_ROUND_CLOSEST(
696
-		EMIF_INTELLI_PHY_DQS_GATE_OPENING_DELAY_PS * 256 , t_ck);
675
+		EMIF_INTELLI_PHY_DQS_GATE_OPENING_DELAY_PS * 256, t_ck);
697676 
698677 	return fifo_we_slave_ratio | fifo_we_slave_ratio << 11 |
699678 		fifo_we_slave_ratio << 22;
....@@ -704,7 +683,7 @@
704683 	u32 fifo_we_slave_ratio;
705684 
706685 	fifo_we_slave_ratio =  DIV_ROUND_CLOSEST(
707
-		EMIF_INTELLI_PHY_DQS_GATE_OPENING_DELAY_PS * 256 , t_ck);
686
+		EMIF_INTELLI_PHY_DQS_GATE_OPENING_DELAY_PS * 256, t_ck);
708687 
709688 	return fifo_we_slave_ratio >> 10 | fifo_we_slave_ratio << 1 |
710689 		fifo_we_slave_ratio << 12 | fifo_we_slave_ratio << 23;
....@@ -715,7 +694,7 @@
715694 	u32 fifo_we_slave_ratio;
716695 
717696 	fifo_we_slave_ratio =  DIV_ROUND_CLOSEST(
718
-		EMIF_INTELLI_PHY_DQS_GATE_OPENING_DELAY_PS * 256 , t_ck);
697
+		EMIF_INTELLI_PHY_DQS_GATE_OPENING_DELAY_PS * 256, t_ck);
719698 
720699 	return fifo_we_slave_ratio >> 9 | fifo_we_slave_ratio << 2 |
721700 		fifo_we_slave_ratio << 13;
....@@ -954,8 +933,7 @@
954933 				EMIF_CUSTOM_CONFIG_EXTENDED_TEMP_PART)) {
955934 		if (emif->temperature_level >= SDRAM_TEMP_HIGH_DERATE_REFRESH) {
956935 			dev_err(emif->dev,
957
-				"%s:NOT Extended temperature capable memory."
958
-				"Converting MR4=0x%02x as shutdown event\n",
936
+				"%s:NOT Extended temperature capable memory. Converting MR4=0x%02x as shutdown event\n",
959937 				__func__, emif->temperature_level);
960938 			/*
961939 			 * Temperature far too high - do kernel_power_off()
....@@ -1297,9 +1275,9 @@
12971275 	if (of_find_property(np_emif, "cal-resistor-per-cs", &len))
12981276 		dev_info->cal_resistors_per_cs = true;
12991277 
1300
-	if (of_device_is_compatible(np_ddr , "jedec,lpddr2-s4"))
1278
+	if (of_device_is_compatible(np_ddr, "jedec,lpddr2-s4"))
13011279 		dev_info->type = DDR_TYPE_LPDDR2_S4;
1302
-	else if (of_device_is_compatible(np_ddr , "jedec,lpddr2-s2"))
1280
+	else if (of_device_is_compatible(np_ddr, "jedec,lpddr2-s2"))
13031281 		dev_info->type = DDR_TYPE_LPDDR2_S2;
13041282 
13051283 	of_property_read_u32(np_ddr, "density", &density);
....@@ -1425,7 +1403,7 @@
14251403 	temp	= devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
14261404 	dev_info = devm_kzalloc(dev, sizeof(*dev_info), GFP_KERNEL);
14271405 
1428
-	if (!emif || !pd || !dev_info) {
1406
+	if (!emif || !temp || !dev_info) {
14291407 		dev_err(dev, "%s:%d: allocation error\n", __func__, __LINE__);
14301408 		goto error;
14311409 	}
....@@ -1517,7 +1495,7 @@
15171495 {
15181496 	struct emif_data	*emif;
15191497 	struct resource		*res;
1520
-	int			irq;
1498
+	int			irq, ret;
15211499 
15221500 	if (pdev->dev.of_node)
15231501 		emif = of_get_memory_device_details(pdev->dev.of_node, &pdev->dev);
....@@ -1542,16 +1520,15 @@
15421520 		goto error;
15431521 
15441522 	irq = platform_get_irq(pdev, 0);
1545
-	if (irq < 0) {
1546
-		dev_err(emif->dev, "%s: error getting IRQ resource - %d\n",
1547
-			__func__, irq);
1523
+	if (irq < 0)
15481524 		goto error;
1549
-	}
15501525 
15511526 	emif_onetime_settings(emif);
15521527 	emif_debugfs_init(emif);
15531528 	disable_and_clear_all_interrupts(emif);
1554
-	setup_interrupts(emif, irq);
1529
+	ret = setup_interrupts(emif, irq);
1530
+	if (ret)
1531
+		goto error;
15551532 
15561533 	/* One-time actions taken on probing the first device */
15571534 	if (!emif1) {
....@@ -1592,7 +1569,7 @@
15921569 static int get_emif_reg_values(struct emif_data *emif, u32 freq,
15931570 		struct emif_regs *regs)
15941571 {
1595
-	u32				cs1_used, ip_rev, phy_type;
1572
+	u32				ip_rev, phy_type;
15961573 	u32				cl, type;
15971574 	const struct lpddr2_timings	*timings;
15981575 	const struct lpddr2_min_tck	*min_tck;
....@@ -1600,7 +1577,6 @@
16001577 	const struct lpddr2_addressing	*addressing;
16011578 	struct emif_data		*emif_for_calc;
16021579 	struct device			*dev;
1603
-	const struct emif_custom_configs *custom_configs;
16041580 
16051581 	dev = emif->dev;
16061582 	/*
....@@ -1618,12 +1594,10 @@
16181594 
16191595 	device_info	= emif_for_calc->plat_data->device_info;
16201596 	type		= device_info->type;
1621
-	cs1_used	= device_info->cs1_used;
16221597 	ip_rev		= emif_for_calc->plat_data->ip_rev;
16231598 	phy_type	= emif_for_calc->plat_data->phy_type;
16241599 
16251600 	min_tck		= emif_for_calc->plat_data->min_tck;
1626
-	custom_configs	= emif_for_calc->plat_data->custom_configs;
16271601 
16281602 	set_ddr_clk_period(freq);
16291603