ARM: uniphier: remove dram_nr_ch from board parameters

This parameter is redundant because we can know the number of
channels by checking if dram_ch[2].size is zero.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/boards.c

@@ -16,7 +16,6 @@ DECLARE_GLOBAL_DATA_PTR;
 #if defined(CONFIG_ARCH_UNIPHIER_SLD3)
 static const struct uniphier_board_data uniphier_sld3_data = {
 	.dram_freq = 1600,
-	.dram_nr_ch = 3,
 	.dram_ch[0] = {
 		.size = 0x20000000,
 		.width = 32,
@@ -36,7 +35,6 @@ static const struct uniphier_board_data uniphier_sld3_data = {
 #if defined(CONFIG_ARCH_UNIPHIER_LD4)
 static const struct uniphier_board_data uniphier_ld4_data = {
 	.dram_freq = 1600,
-	.dram_nr_ch = 2,
 	.dram_ch[0] = {
 		.size = 0x10000000,
 		.width = 16,
@@ -53,7 +51,6 @@ static const struct uniphier_board_data uniphier_ld4_data = {
 /* 1GB RAM board */
 static const struct uniphier_board_data uniphier_pro4_data = {
 	.dram_freq = 1600,
-	.dram_nr_ch = 2,
 	.dram_ch[0] = {
 		.size = 0x20000000,
 		.width = 32,
@@ -67,7 +64,6 @@ static const struct uniphier_board_data uniphier_pro4_data = {
 /* 2GB RAM board */
 static const struct uniphier_board_data uniphier_pro4_2g_data = {
 	.dram_freq = 1600,
-	.dram_nr_ch = 2,
 	.dram_ch[0] = {
 		.size = 0x40000000,
 		.width = 32,
@@ -82,7 +78,6 @@ static const struct uniphier_board_data uniphier_pro4_2g_data = {
 #if defined(CONFIG_ARCH_UNIPHIER_SLD8)
 static const struct uniphier_board_data uniphier_sld8_data = {
 	.dram_freq = 1333,
-	.dram_nr_ch = 2,
 	.dram_ch[0] = {
 		.size = 0x10000000,
 		.width = 16,
@@ -98,7 +93,6 @@ static const struct uniphier_board_data uniphier_sld8_data = {
 #if defined(CONFIG_ARCH_UNIPHIER_PRO5)
 static const struct uniphier_board_data uniphier_pro5_data = {
 	.dram_freq = 1866,
-	.dram_nr_ch = 2,
 	.dram_ch[0] = {
 		.size = 0x20000000,
 		.width = 32,
@@ -113,7 +107,6 @@ static const struct uniphier_board_data uniphier_pro5_data = {
 #if defined(CONFIG_ARCH_UNIPHIER_PXS2)
 static const struct uniphier_board_data uniphier_pxs2_data = {
 	.dram_freq = 2133,
-	.dram_nr_ch = 3,
 	.dram_ch[0] = {
 		.size = 0x40000000,
 		.width = 32,
@@ -132,7 +125,6 @@ static const struct uniphier_board_data uniphier_pxs2_data = {
 #if defined(CONFIG_ARCH_UNIPHIER_LD6B)
 static const struct uniphier_board_data uniphier_ld6b_data = {
 	.dram_freq = 1866,
-	.dram_nr_ch = 3,
 	.dram_ch[0] = {
 		.size = 0x40000000,
 		.width = 32,
@@ -151,7 +143,6 @@ static const struct uniphier_board_data uniphier_ld6b_data = {
 #if defined(CONFIG_ARCH_UNIPHIER_LD11)
 static const struct uniphier_board_data uniphier_ld11_data = {
 	.dram_freq = 1600,
-	.dram_nr_ch = 2,
 	.dram_ch[0] = {
 		.size = 0x20000000,
 		.width = 16,
@@ -166,7 +157,6 @@ static const struct uniphier_board_data uniphier_ld11_data = {
 #if defined(CONFIG_ARCH_UNIPHIER_LD20)
 static const struct uniphier_board_data uniphier_ld20_ref_data = {
 	.dram_freq = 1866,
-	.dram_nr_ch = 3,
 	.dram_ch[0] = {
 		.size = 0x40000000,
 		.width = 32,
@@ -184,7 +174,6 @@ static const struct uniphier_board_data uniphier_ld20_ref_data = {
 
 static const struct uniphier_board_data uniphier_ld20_data = {
 	.dram_freq = 1866,
-	.dram_nr_ch = 3,
 	.dram_ch[0] = {
 		.size = 0x40000000,
 		.width = 32,
@@ -202,7 +191,6 @@ static const struct uniphier_board_data uniphier_ld20_data = {
 
 static const struct uniphier_board_data uniphier_ld21_data = {
 	.dram_freq = 1866,
-	.dram_nr_ch = 2,
 	.dram_ch[0] = {
 		.size = 0x20000000,
 		.width = 32,

arch/arm/mach-uniphier/dram/umc-ld11.c

@@ -471,7 +471,7 @@ int uniphier_ld11_umc_init(const struct uniphier_board_data *bd)
 
 	ddrphy_init(phy_base, freq);
 
-	for (ch = 0; ch < bd->dram_nr_ch; ch++) {
+	for (ch = 0; ch < DRAM_CH_NR; ch++) {
 		unsigned long size = bd->dram_ch[ch].size;
 		unsigned int width = bd->dram_ch[ch].width;
 

arch/arm/mach-uniphier/dram/umc-ld20.c

@@ -606,15 +606,18 @@ int uniphier_ld20_umc_init(const struct uniphier_board_data *bd)
 		return -EINVAL;
 	}
 
-	for (ch = 0; ch < bd->dram_nr_ch; ch++) {
+	for (ch = 0; ch < DRAM_CH_NR; ch++) {
 		unsigned long size = bd->dram_ch[ch].size;
 		unsigned int width = bd->dram_ch[ch].width;
 
-		ret = umc_ch_init(umc_ch_base, phy_ch_base, board,
-				  bd->dram_freq, size / (width / 16), ch);
-		if (ret) {
-			pr_err("failed to initialize UMC ch%d\n", ch);
-			return ret;
+		if (size) {
+			ret = umc_ch_init(umc_ch_base, phy_ch_base, board,
+					  bd->dram_freq, size / (width / 16),
+					  ch);
+			if (ret) {
+				pr_err("failed to initialize UMC ch%d\n", ch);
+				return ret;
+			}
 		}
 
 		umc_ch_base += 0x00200000;

arch/arm/mach-uniphier/dram/umc-pxs2.c

@@ -619,15 +619,17 @@ int uniphier_pxs2_umc_init(const struct uniphier_board_data *bd)
 		return -EINVAL;
 	}
 
-	for (ch = 0; ch < bd->dram_nr_ch; ch++) {
+	for (ch = 0; ch < DRAM_CH_NR; ch++) {
 		unsigned long size = bd->dram_ch[ch].size;
 		unsigned int width = bd->dram_ch[ch].width;
 
-		ret = umc_ch_init(umc_ch_base, freq, size / (width / 16),
-				  width, ch);
-		if (ret) {
-			pr_err("failed to initialize UMC ch%d\n", ch);
-			return ret;
+		if (size) {
+			ret = umc_ch_init(umc_ch_base, freq,
+					  size / (width / 16), width, ch);
+			if (ret) {
+				pr_err("failed to initialize UMC ch%d\n", ch);
+				return ret;
+			}
 		}
 
 		umc_ch_base += 0x00200000;

arch/arm/mach-uniphier/init.h

@@ -19,7 +19,6 @@ struct uniphier_dram_ch {
 
 struct uniphier_board_data {
 	unsigned int dram_freq;
-	unsigned int dram_nr_ch;
 	struct uniphier_dram_ch dram_ch[UNIPHIER_MAX_NR_DRAM_CH];
 	unsigned int flags;