[PATCH/RFC] ARM: shmobile: Add r8a7791 thermal sensor DT device

[Magnus Damm <magnus.damm@gmail.com>]

From: Magnus Damm <damm@opensource.se>

Hook up the single channel thermal sensor via DT
on r8a7791. The information comes from the device
data sheet.

Unfortunately it seems that r8a7791 uses a different
register offset compared to r8a7790, so passing
the singel channel offset results in the following
error:

rcar_thermal e61f0000.thermal: can't request region for resource [mem 0xe61f0000-0xe61f0037]                                                                    
rcar_thermal: probe of e61f0000.thermal failed with error -16                   

Before this can be merged the thermal driver may beed
to be extended to support the different register layouts
for the thermal sensor in r8a7779, r8a7790 and r8a7791.

Not-Yet-Signed-off-by: Magnus Damm <damm@opensource.se>
---

 Written against renesas-devel-20130925

 arch/arm/boot/dts/r8a7791.dtsi         |    7 +++++++
 arch/arm/mach-shmobile/clock-r8a7791.c |    3 +++
 2 files changed, 10 insertions(+)

--- 0001/arch/arm/boot/dts/r8a7791.dtsi
+++ work/arch/arm/boot/dts/r8a7791.dtsi	2013-09-26 07:34:01.000000000 +0900
@@ -38,4 +38,11 @@
 			<0 0xf1006000 0 0x2000>;
 		interrupts = <1 9 0xf04>;
 	};
+
+	thermal@e61f0000 {
+		compatible = "renesas,rcar-thermal";
+		reg = <0 0xe61f0000 0 0x14>, <0 0xe61f0000 0 0x38>;
+		interrupt-parent = <&gic>;
+		interrupts = <0 69 4>;
+	};
 };
--- 0001/arch/arm/mach-shmobile/clock-r8a7791.c
+++ work/arch/arm/mach-shmobile/clock-r8a7791.c	2013-09-26 07:32:34.000000000 +0900
@@ -122,6 +122,7 @@ static struct clk *main_clks[] = {
 enum {
 	MSTP721, MSTP720,
 	MSTP719, MSTP718, MSTP715, MSTP714,
+	MSTP522,
 	MSTP216, MSTP207, MSTP206,
 	MSTP204, MSTP203, MSTP202, MSTP1105, MSTP1106, MSTP1107,
 	MSTP124,
@@ -135,6 +136,7 @@ static struct clk mstp_clks[MSTP_NR] = {
 	[MSTP718] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 18, 0), /* SCIF3 */
 	[MSTP715] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 15, 0), /* SCIF4 */
 	[MSTP714] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 14, 0), /* SCIF5 */
+	[MSTP522] = SH_CLK_MSTP32(&extal_clk, SMSTPCR5, 22, 0), /* Thermal */
 	[MSTP216] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 16, 0), /* SCIFB2 */
 	[MSTP207] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 7, 0), /* SCIFB1 */
 	[MSTP206] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 6, 0), /* SCIFB0 */
@@ -179,6 +181,7 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_DEV_ID("sh-sci.12", &mstp_clks[MSTP1105]), /* SCIFA3 */
 	CLKDEV_DEV_ID("sh-sci.13", &mstp_clks[MSTP1106]), /* SCIFA4 */
 	CLKDEV_DEV_ID("sh-sci.14", &mstp_clks[MSTP1107]), /* SCIFA5 */
+	CLKDEV_DEV_ID("e61f0000.thermal", &mstp_clks[MSTP522]),
 	CLKDEV_DEV_ID("sh_cmt.0", &mstp_clks[MSTP124]),
 };