serial: sh-sci: clkdev updates for MSTP gating.

This fixes up some of the I/D/F clock ambiguity in the sh-sci driver.
The interface clock in most cases just wraps back to the peripheral
clock, while the function clock wraps in to the MSTP bits. As the logic
was somewhat inverted, this cleans that up, and also enables all CPUs
with SCI MSTP bits to match function clocks through clkdev lookup.

As a result, this gets rid of the clk string abuse on the sh side, and
the clock string will be killed off once the ARM code has had a chance to
sync up. This also enables MSTP gating on CPUs like 7786 which had never
wired it up before. Impacted CPUs are primarily all SH-Mobiles, SH7785,
and SH7786.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

14 files changed, 71 insertions, 80 deletions

diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7343.c b/arch/sh/kernel/cpu/sh4a/clock-sh7343.c
index 2c16df37eda6..c541301c7f2b 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7343.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7343.c
@@ -159,10 +159,10 @@ static struct clk mstp_clks[] = {
 	MSTP("rwdt0", &r_clk, MSTPCR0, 13, 0),
 	MSTP("mfi0", &div4_clks[DIV4_P], MSTPCR0, 11, 0),
 	MSTP("flctl0", &div4_clks[DIV4_P], MSTPCR0, 10, 0),
-	MSTP("scif0", &div4_clks[DIV4_P], MSTPCR0, 7, 0),
-	MSTP("scif1", &div4_clks[DIV4_P], MSTPCR0, 6, 0),
-	MSTP("scif2", &div4_clks[DIV4_P], MSTPCR0, 5, 0),
-	MSTP("scif3", &div4_clks[DIV4_P], MSTPCR0, 4, 0),
+	SH_CLK_MSTP32("sci_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 7, 0),
+	SH_CLK_MSTP32("sci_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 6, 0),
+	SH_CLK_MSTP32("sci_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 5, 0),
+	SH_CLK_MSTP32("sci_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 4, 0),
 	MSTP("sio0", &div4_clks[DIV4_P], MSTPCR0, 3, 0),
 	MSTP("siof0", &div4_clks[DIV4_P], MSTPCR0, 2, 0),
 	MSTP("siof1", &div4_clks[DIV4_P], MSTPCR0, 1, 0),
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7366.c b/arch/sh/kernel/cpu/sh4a/clock-sh7366.c
index 91588d280cd8..e10c64fd8095 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7366.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7366.c
@@ -163,9 +163,9 @@ static struct clk mstp_clks[] = {
 	MSTP("rwdt0", &r_clk, MSTPCR0, 13, 0),
 	MSTP("mfi0", &div4_clks[DIV4_P], MSTPCR0, 11, 0),
 	MSTP("flctl0", &div4_clks[DIV4_P], MSTPCR0, 10, 0),
-	MSTP("scif0", &div4_clks[DIV4_P], MSTPCR0, 7, 0),
-	MSTP("scif1", &div4_clks[DIV4_P], MSTPCR0, 6, 0),
-	MSTP("scif2", &div4_clks[DIV4_P], MSTPCR0, 5, 0),
+	SH_CLK_MSTP32("sci_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 7, 0),
+	SH_CLK_MSTP32("sci_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 6, 0),
+	SH_CLK_MSTP32("sci_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 5, 0),
 	MSTP("msiof0", &div4_clks[DIV4_P], MSTPCR0, 2, 0),
 	MSTP("sbr0", &div4_clks[DIV4_P], MSTPCR0, 1, 0),
 
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7722.c b/arch/sh/kernel/cpu/sh4a/clock-sh7722.c
index 15db6d521c5c..0732c8bab1e2 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7722.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7722.c
@@ -164,9 +164,9 @@ static struct clk mstp_clks[] = {
 	SH_HWBLK_CLK("cmt0", -1, R_CLK, HWBLK_CMT, 0),
 	SH_HWBLK_CLK("rwdt0", -1, R_CLK, HWBLK_RWDT, 0),
 	SH_HWBLK_CLK("flctl0", -1, P_CLK, HWBLK_FLCTL, 0),
-	SH_HWBLK_CLK("scif0", -1, P_CLK, HWBLK_SCIF0, 0),
-	SH_HWBLK_CLK("scif1", -1, P_CLK, HWBLK_SCIF1, 0),
-	SH_HWBLK_CLK("scif2", -1, P_CLK, HWBLK_SCIF2, 0),
+	SH_HWBLK_CLK("sci_fck", 0, P_CLK, HWBLK_SCIF0, 0),
+	SH_HWBLK_CLK("sci_fck", 1, P_CLK, HWBLK_SCIF1, 0),
+	SH_HWBLK_CLK("sci_fck", 2, P_CLK, HWBLK_SCIF2, 0),
 
 	SH_HWBLK_CLK("i2c0", -1, P_CLK, HWBLK_IIC, 0),
 	SH_HWBLK_CLK("rtc0", -1, R_CLK, HWBLK_RTC, 0),
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7723.c b/arch/sh/kernel/cpu/sh4a/clock-sh7723.c
index 50babe01fe44..4d4c123d02c4 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7723.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7723.c
@@ -177,12 +177,12 @@ static struct clk mstp_clks[] = {
 	SH_HWBLK_CLK("dmac1", -1, B_CLK, HWBLK_DMAC1, 0),
 	SH_HWBLK_CLK("tmu1", -1, P_CLK, HWBLK_TMU1, 0),
 	SH_HWBLK_CLK("flctl0", -1, P_CLK, HWBLK_FLCTL, 0),
-	SH_HWBLK_CLK("scif0", -1, P_CLK, HWBLK_SCIF0, 0),
-	SH_HWBLK_CLK("scif1", -1, P_CLK, HWBLK_SCIF1, 0),
-	SH_HWBLK_CLK("scif2", -1, P_CLK, HWBLK_SCIF2, 0),
-	SH_HWBLK_CLK("scif3", -1, B_CLK, HWBLK_SCIF3, 0),
-	SH_HWBLK_CLK("scif4", -1, B_CLK, HWBLK_SCIF4, 0),
-	SH_HWBLK_CLK("scif5", -1, B_CLK, HWBLK_SCIF5, 0),
+	SH_HWBLK_CLK("sci_fck", 0, P_CLK, HWBLK_SCIF0, 0),
+	SH_HWBLK_CLK("sci_fck", 1, P_CLK, HWBLK_SCIF1, 0),
+	SH_HWBLK_CLK("sci_fck", 2, P_CLK, HWBLK_SCIF2, 0),
+	SH_HWBLK_CLK("sci_fck", 3, B_CLK, HWBLK_SCIF3, 0),
+	SH_HWBLK_CLK("sci_fck", 4, B_CLK, HWBLK_SCIF4, 0),
+	SH_HWBLK_CLK("sci_fck", 5, B_CLK, HWBLK_SCIF5, 0),
 	SH_HWBLK_CLK("msiof0", -1, B_CLK, HWBLK_MSIOF0, 0),
 	SH_HWBLK_CLK("msiof1", -1, B_CLK, HWBLK_MSIOF1, 0),
 	SH_HWBLK_CLK("meram0", -1, SH_CLK, HWBLK_MERAM, 0),
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7724.c b/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
index 6707061fbf54..bcf2b97db300 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
@@ -194,12 +194,12 @@ static struct clk mstp_clks[] = {
 	SH_HWBLK_CLK("rwdt0", -1, R_CLK, HWBLK_RWDT, 0),
 	SH_HWBLK_CLK("dmac1", -1, B_CLK, HWBLK_DMAC1, 0),
 	SH_HWBLK_CLK("tmu1", -1, P_CLK, HWBLK_TMU1, 0),
-	SH_HWBLK_CLK("scif0", -1, P_CLK, HWBLK_SCIF0, 0),
-	SH_HWBLK_CLK("scif1", -1, P_CLK, HWBLK_SCIF1, 0),
-	SH_HWBLK_CLK("scif2", -1, P_CLK, HWBLK_SCIF2, 0),
-	SH_HWBLK_CLK("scif3", -1, B_CLK, HWBLK_SCIF3, 0),
-	SH_HWBLK_CLK("scif4", -1, B_CLK, HWBLK_SCIF4, 0),
-	SH_HWBLK_CLK("scif5", -1, B_CLK, HWBLK_SCIF5, 0),
+	SH_HWBLK_CLK("sci_fck", 0, P_CLK, HWBLK_SCIF0, 0),
+	SH_HWBLK_CLK("sci_fck", 1, P_CLK, HWBLK_SCIF1, 0),
+	SH_HWBLK_CLK("sci_fck", 2, P_CLK, HWBLK_SCIF2, 0),
+	SH_HWBLK_CLK("sci_fck", 3, B_CLK, HWBLK_SCIF3, 0),
+	SH_HWBLK_CLK("sci_fck", 4, B_CLK, HWBLK_SCIF4, 0),
+	SH_HWBLK_CLK("sci_fck", 5, B_CLK, HWBLK_SCIF5, 0),
 	SH_HWBLK_CLK("msiof0", -1, B_CLK, HWBLK_MSIOF0, 0),
 	SH_HWBLK_CLK("msiof1", -1, B_CLK, HWBLK_MSIOF1, 0),
 
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7785.c b/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
index d997f0a25b10..6061c736c281 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
@@ -88,12 +88,12 @@ struct clk div4_clks[DIV4_NR] = {
 
 static struct clk mstp_clks[] = {
 	/* MSTPCR0 */
-	SH_CLK_MSTP32("scif_fck", 5, &div4_clks[DIV4_P], MSTPCR0, 29, 0),
-	SH_CLK_MSTP32("scif_fck", 4, &div4_clks[DIV4_P], MSTPCR0, 28, 0),
-	SH_CLK_MSTP32("scif_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 27, 0),
-	SH_CLK_MSTP32("scif_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 26, 0),
-	SH_CLK_MSTP32("scif_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 25, 0),
-	SH_CLK_MSTP32("scif_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 24, 0),
+	SH_CLK_MSTP32("sci_fck", 5, &div4_clks[DIV4_P], MSTPCR0, 29, 0),
+	SH_CLK_MSTP32("sci_fck", 4, &div4_clks[DIV4_P], MSTPCR0, 28, 0),
+	SH_CLK_MSTP32("sci_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 27, 0),
+	SH_CLK_MSTP32("sci_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 26, 0),
+	SH_CLK_MSTP32("sci_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 25, 0),
+	SH_CLK_MSTP32("sci_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 24, 0),
 	SH_CLK_MSTP32("ssi_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 21, 0),
 	SH_CLK_MSTP32("ssi_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 20, 0),
 	SH_CLK_MSTP32("hac_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 17, 0),
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7786.c b/arch/sh/kernel/cpu/sh4a/clock-sh7786.c
index af69fd468703..85e8d57f4971 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7786.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7786.c
@@ -87,12 +87,12 @@ struct clk div4_clks[DIV4_NR] = {
 
 static struct clk mstp_clks[] = {
 	/* MSTPCR0 */
-	SH_CLK_MSTP32("scif_fck", 5, &div4_clks[DIV4_P], MSTPCR0, 29, 0),
-	SH_CLK_MSTP32("scif_fck", 4, &div4_clks[DIV4_P], MSTPCR0, 28, 0),
-	SH_CLK_MSTP32("scif_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 27, 0),
-	SH_CLK_MSTP32("scif_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 26, 0),
-	SH_CLK_MSTP32("scif_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 25, 0),
-	SH_CLK_MSTP32("scif_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 24, 0),
+	SH_CLK_MSTP32("sci_fck", 5, &div4_clks[DIV4_P], MSTPCR0, 29, 0),
+	SH_CLK_MSTP32("sci_fck", 4, &div4_clks[DIV4_P], MSTPCR0, 28, 0),
+	SH_CLK_MSTP32("sci_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 27, 0),
+	SH_CLK_MSTP32("sci_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 26, 0),
+	SH_CLK_MSTP32("sci_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 25, 0),
+	SH_CLK_MSTP32("sci_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 24, 0),
 	SH_CLK_MSTP32("ssi_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 23, 0),
 	SH_CLK_MSTP32("ssi_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 22, 0),
 	SH_CLK_MSTP32("ssi_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 21, 0),
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7343.c b/arch/sh/kernel/cpu/sh4a/setup-sh7343.c
index fdbd7d07a69f..6f8394942fc5 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7343.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7343.c
@@ -21,7 +21,6 @@ static struct plat_sci_port scif0_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 80, 80, 80, 80 },
-	.clk		= "scif0",
 };
 
 static struct platform_device scif0_device = {
@@ -37,7 +36,6 @@ static struct plat_sci_port scif1_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 81, 81, 81, 81 },
-	.clk		= "scif1",
 };
 
 static struct platform_device scif1_device = {
@@ -53,7 +51,6 @@ static struct plat_sci_port scif2_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 82, 82, 82, 82 },
-	.clk		= "scif2",
 };
 
 static struct platform_device scif2_device = {
@@ -69,7 +66,6 @@ static struct plat_sci_port scif3_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 83, 83, 83, 83 },
-	.clk		= "scif3",
 };
 
 static struct platform_device scif3_device = {
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7366.c b/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
index d90fe0a65c2a..1d897ed256b0 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
@@ -23,7 +23,6 @@ static struct plat_sci_port scif0_platform_data = {
 	.flags		= UPF_BOOT_AUTOCONF,
 	.type		= PORT_SCIF,
 	.irqs		= { 80, 80, 80, 80 },
-	.clk		= "scif0",
 };
 
 static struct platform_device scif0_device = {
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
index 83ae9ad19874..847a27619af5 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
@@ -174,7 +174,6 @@ static struct plat_sci_port scif0_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 80, 80, 80, 80 },
-	.clk		= "scif0",
 };
 
 static struct platform_device scif0_device = {
@@ -190,7 +189,6 @@ static struct plat_sci_port scif1_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 81, 81, 81, 81 },
-	.clk		= "scif1",
 };
 
 static struct platform_device scif1_device = {
@@ -206,7 +204,6 @@ static struct plat_sci_port scif2_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 82, 82, 82, 82 },
-	.clk		= "scif2",
 };
 
 static struct platform_device scif2_device = {
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7723.c b/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
index 68446b3f06af..187462b51be0 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
@@ -26,7 +26,6 @@ static struct plat_sci_port scif0_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 80, 80, 80, 80 },
-	.clk		= "scif0",
 };
 
 static struct platform_device scif0_device = {
@@ -42,7 +41,6 @@ static struct plat_sci_port scif1_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 81, 81, 81, 81 },
-	.clk		= "scif1",
 };
 
 static struct platform_device scif1_device = {
@@ -58,7 +56,6 @@ static struct plat_sci_port scif2_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 82, 82, 82, 82 },
-	.clk		= "scif2",
 };
 
 static struct platform_device scif2_device = {
@@ -74,7 +71,6 @@ static struct plat_sci_port scif3_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIFA,
 	.irqs           = { 56, 56, 56, 56 },
-	.clk		= "scif3",
 };
 
 static struct platform_device scif3_device = {
@@ -90,7 +86,6 @@ static struct plat_sci_port scif4_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIFA,
 	.irqs           = { 88, 88, 88, 88 },
-	.clk		= "scif4",
 };
 
 static struct platform_device scif4_device = {
@@ -106,7 +101,6 @@ static struct plat_sci_port scif5_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIFA,
 	.irqs           = { 109, 109, 109, 109 },
-	.clk		= "scif5",
 };
 
 static struct platform_device scif5_device = {
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index abc98b0fef91..ee9789003193 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -213,7 +213,6 @@ static struct plat_sci_port scif0_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 80, 80, 80, 80 },
-	.clk		= "scif0",
 };
 
 static struct platform_device scif0_device = {
@@ -229,7 +228,6 @@ static struct plat_sci_port scif1_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 81, 81, 81, 81 },
-	.clk		= "scif1",
 };
 
 static struct platform_device scif1_device = {
@@ -245,7 +243,6 @@ static struct plat_sci_port scif2_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIF,
 	.irqs           = { 82, 82, 82, 82 },
-	.clk		= "scif2",
 };
 
 static struct platform_device scif2_device = {
@@ -261,7 +258,6 @@ static struct plat_sci_port scif3_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIFA,
 	.irqs           = { 56, 56, 56, 56 },
-	.clk		= "scif3",
 };
 
 static struct platform_device scif3_device = {
@@ -277,7 +273,6 @@ static struct plat_sci_port scif4_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIFA,
 	.irqs           = { 88, 88, 88, 88 },
-	.clk		= "scif4",
 };
 
 static struct platform_device scif4_device = {
@@ -293,7 +288,6 @@ static struct plat_sci_port scif5_platform_data = {
 	.flags          = UPF_BOOT_AUTOCONF,
 	.type           = PORT_SCIFA,
 	.irqs           = { 109, 109, 109, 109 },
-	.clk		= "scif5",
 };
 
 static struct platform_device scif5_device = {
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
index 05e9308505cf..76afe571f3a2 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
@@ -25,7 +25,6 @@ static struct plat_sci_port scif0_platform_data = {
 	.flags		= UPF_BOOT_AUTOCONF,
 	.type		= PORT_SCIF,
 	.irqs		= { 40, 40, 40, 40 },
-	.clk		= "scif_fck",
 };
 
 static struct platform_device scif0_device = {
@@ -41,7 +40,6 @@ static struct plat_sci_port scif1_platform_data = {
 	.flags		= UPF_BOOT_AUTOCONF,
 	.type		= PORT_SCIF,
 	.irqs		= { 44, 44, 44, 44 },
-	.clk		= "scif_fck",
 };
 
 static struct platform_device scif1_device = {
@@ -57,7 +55,6 @@ static struct plat_sci_port scif2_platform_data = {
 	.flags		= UPF_BOOT_AUTOCONF,
 	.type		= PORT_SCIF,
 	.irqs		= { 60, 60, 60, 60 },
-	.clk		= "scif_fck",
 };
 
 static struct platform_device scif2_device = {
@@ -73,7 +70,6 @@ static struct plat_sci_port scif3_platform_data = {
 	.flags		= UPF_BOOT_AUTOCONF,
 	.type		= PORT_SCIF,
 	.irqs		= { 61, 61, 61, 61 },
-	.clk		= "scif_fck",
 };
 
 static struct platform_device scif3_device = {
@@ -89,7 +85,6 @@ static struct plat_sci_port scif4_platform_data = {
 	.flags		= UPF_BOOT_AUTOCONF,
 	.type		= PORT_SCIF,
 	.irqs		= { 62, 62, 62, 62 },
-	.clk		= "scif_fck",
 };
 
 static struct platform_device scif4_device = {
@@ -105,7 +100,6 @@ static struct plat_sci_port scif5_platform_data = {
 	.flags		= UPF_BOOT_AUTOCONF,
 	.type		= PORT_SCIF,
 	.irqs		= { 63, 63, 63, 63 },
-	.clk		= "scif_fck",
 };
 
 static struct platform_device scif5_device = {
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 980f39449ee5..054a8427c739 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -83,8 +83,8 @@ struct sci_port {
 
 	/* Interface clock */
 	struct clk		*iclk;
-	/* Data clock */
-	struct clk		*dclk;
+	/* Function clock */
+	struct clk		*fclk;
 
 	struct list_head	node;
 	struct dma_chan			*chan_tx;
@@ -803,7 +803,7 @@ static int sci_notifier(struct notifier_block *self,
 	    (phase == CPUFREQ_RESUMECHANGE)) {
 		spin_lock_irqsave(&priv->lock, flags);
 		list_for_each_entry(sci_port, &priv->ports, node)
-			sci_port->port.uartclk = clk_get_rate(sci_port->dclk);
+			sci_port->port.uartclk = clk_get_rate(sci_port->iclk);
 		spin_unlock_irqrestore(&priv->lock, flags);
 	}
 
@@ -814,21 +814,17 @@ static void sci_clk_enable(struct uart_port *port)
 {
 	struct sci_port *sci_port = to_sci_port(port);
 
-	clk_enable(sci_port->dclk);
-	sci_port->port.uartclk = clk_get_rate(sci_port->dclk);
-
-	if (sci_port->iclk)
-		clk_enable(sci_port->iclk);
+	clk_enable(sci_port->iclk);
+	sci_port->port.uartclk = clk_get_rate(sci_port->iclk);
+	clk_enable(sci_port->fclk);
 }
 
 static void sci_clk_disable(struct uart_port *port)
 {
 	struct sci_port *sci_port = to_sci_port(port);
 
-	if (sci_port->iclk)
-		clk_disable(sci_port->iclk);
-
-	clk_disable(sci_port->dclk);
+	clk_disable(sci_port->fclk);
+	clk_disable(sci_port->iclk);
 }
 
 static int sci_request_irq(struct sci_port *port)
@@ -1557,10 +1553,10 @@ static struct uart_ops sci_uart_ops = {
 #endif
 };
 
-static void __devinit sci_init_single(struct platform_device *dev,
-				      struct sci_port *sci_port,
-				      unsigned int index,
-				      struct plat_sci_port *p)
+static int __devinit sci_init_single(struct platform_device *dev,
+				     struct sci_port *sci_port,
+				     unsigned int index,
+				     struct plat_sci_port *p)
 {
 	struct uart_port *port = &sci_port->port;
 
@@ -1581,8 +1577,23 @@ static void __devinit sci_init_single(struct platform_device *dev,
 	}
 
 	if (dev) {
-		sci_port->iclk = p->clk ? clk_get(&dev->dev, p->clk) : NULL;
-		sci_port->dclk = clk_get(&dev->dev, "peripheral_clk");
+		sci_port->iclk = clk_get(&dev->dev, "sci_ick");
+		if (IS_ERR(sci_port->iclk)) {
+			sci_port->iclk = clk_get(&dev->dev, "peripheral_clk");
+			if (IS_ERR(sci_port->iclk)) {
+				dev_err(&dev->dev, "can't get iclk\n");
+				return PTR_ERR(sci_port->iclk);
+			}
+		}
+
+		/*
+		 * The function clock is optional, ignore it if we can't
+		 * find it.
+		 */
+		sci_port->fclk = clk_get(&dev->dev, "sci_fck");
+		if (IS_ERR(sci_port->fclk))
+			sci_port->fclk = NULL;
+
 		sci_port->enable = sci_clk_enable;
 		sci_port->disable = sci_clk_disable;
 		port->dev = &dev->dev;
@@ -1609,6 +1620,7 @@ static void __devinit sci_init_single(struct platform_device *dev,
 #endif
 
 	memcpy(&sci_port->irqs, &p->irqs, sizeof(p->irqs));
+	return 0;
 }
 
 #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
@@ -1758,8 +1770,11 @@ static int sci_remove(struct platform_device *dev)
 	cpufreq_unregister_notifier(&priv->clk_nb, CPUFREQ_TRANSITION_NOTIFIER);
 
 	spin_lock_irqsave(&priv->lock, flags);
-	list_for_each_entry(p, &priv->ports, node)
+	list_for_each_entry(p, &priv->ports, node) {
 		uart_remove_one_port(&sci_uart_driver, &p->port);
+		clk_put(p->iclk);
+		clk_put(p->fclk);
+	}
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	kfree(priv);
@@ -1785,7 +1800,9 @@ static int __devinit sci_probe_single(struct platform_device *dev,
 		return 0;
 	}
 
-	sci_init_single(dev, sciport, index, p);
+	ret = sci_init_single(dev, sciport, index, p);
+	if (ret)
+		return ret;
 
 	ret = uart_add_one_port(&sci_uart_driver, &sciport->port);
 	if (ret)