[PATCH 01/03] ARM: shmobile: Add r8a7791 legacy SDHI clocks

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

From: Magnus Damm <damm@opensource.se>

Add legacy r8a7791 SDHI clocks. This to allow the SDHI devices
to be used by legacy Koelsch board support.

Signed-off-by: Magnus Damm <damm@opensource.se>
---

 arch/arm/mach-shmobile/clock-r8a7791.c |   51 ++++++++++++++++++++++++++++++--
 1 file changed, 49 insertions(+), 2 deletions(-)

--- 0001/arch/arm/mach-shmobile/clock-r8a7791.c
+++ work/arch/arm/mach-shmobile/clock-r8a7791.c	2014-02-10 16:01:10.000000000 +0900
@@ -61,6 +61,7 @@
 
 #define MSTPSR1		IOMEM(0xe6150038)
 #define MSTPSR2		IOMEM(0xe6150040)
+#define MSTPSR3		IOMEM(0xe6150048)
 #define MSTPSR5		IOMEM(0xe615003c)
 #define MSTPSR7		IOMEM(0xe61501c4)
 #define MSTPSR8		IOMEM(0xe61509a0)
@@ -69,8 +70,8 @@
 
 #define MODEMR		0xE6160060
 #define SDCKCR		0xE6150074
-#define SD2CKCR		0xE6150078
-#define SD3CKCR		0xE615007C
+#define SD1CKCR		0xE6150078
+#define SD2CKCR		0xE615026c
 #define MMC0CKCR	0xE6150240
 #define MMC1CKCR	0xE6150244
 #define SSPCKCR		0xE6150248
@@ -134,6 +135,39 @@ static struct clk *main_clks[] = {
 	&zs_clk,
 };
 
+/* SDHI (DIV4) clock */
+static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18, 24, 0, 36, 48, 10 };
+
+static struct clk_div_mult_table div4_div_mult_table = {
+	.divisors = divisors,
+	.nr_divisors = ARRAY_SIZE(divisors),
+};
+
+static struct clk_div4_table div4_table = {
+	.div_mult_table = &div4_div_mult_table,
+};
+
+enum {
+	DIV4_SDH, DIV4_SD0,
+	DIV4_NR
+};
+
+static struct clk div4_clks[DIV4_NR] = {
+	[DIV4_SDH] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 8, 0x0dff, CLK_ENABLE_ON_INIT),
+	[DIV4_SD0] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 4, 0x1de0, CLK_ENABLE_ON_INIT),
+};
+
+/* DIV6 clocks */
+enum {
+	DIV6_SD1, DIV6_SD2,
+	DIV6_NR
+};
+
+static struct clk div6_clks[DIV6_NR] = {
+	[DIV6_SD1]	= SH_CLK_DIV6(&pll1_div2_clk, SD1CKCR, 0),
+	[DIV6_SD2]	= SH_CLK_DIV6(&pll1_div2_clk, SD2CKCR, 0),
+};
+
 /* MSTP */
 enum {
 	MSTP931, MSTP930, MSTP929, MSTP928, MSTP927, MSTP925,
@@ -144,6 +178,7 @@ enum {
 	MSTP726, MSTP724, MSTP723, MSTP721, MSTP720,
 	MSTP719, MSTP718, MSTP715, MSTP714,
 	MSTP522,
+	MSTP314, MSTP312, MSTP311,
 	MSTP216, MSTP207, MSTP206,
 	MSTP204, MSTP203, MSTP202, MSTP1105, MSTP1106, MSTP1107,
 	MSTP124,
@@ -174,6 +209,9 @@ static struct clk mstp_clks[MSTP_NR] = {
 	[MSTP715] = SH_CLK_MSTP32_STS(&p_clk, SMSTPCR7, 15, MSTPSR7, 0), /* SCIF4 */
 	[MSTP714] = SH_CLK_MSTP32_STS(&p_clk, SMSTPCR7, 14, MSTPSR7, 0), /* SCIF5 */
 	[MSTP522] = SH_CLK_MSTP32_STS(&extal_clk, SMSTPCR5, 22, MSTPSR5, 0), /* Thermal */
+	[MSTP314] = SH_CLK_MSTP32_STS(&div4_clks[DIV4_SD0], SMSTPCR3, 14, MSTPSR3, 0), /* SDHI0 */
+	[MSTP312] = SH_CLK_MSTP32_STS(&div6_clks[DIV6_SD1], SMSTPCR3, 12, MSTPSR3, 0), /* SDHI1 */
+	[MSTP311] = SH_CLK_MSTP32_STS(&div6_clks[DIV6_SD2], SMSTPCR3, 11, MSTPSR3, 0), /* SDHI2 */
 	[MSTP216] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR2, 16, MSTPSR2, 0), /* SCIFB2 */
 	[MSTP207] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR2, 7, MSTPSR2, 0), /* SCIFB1 */
 	[MSTP206] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR2, 6, MSTPSR2, 0), /* SCIFB0 */
@@ -224,6 +262,9 @@ 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("sh_mobile_sdhi.0", &mstp_clks[MSTP314]),
+	CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP312]),
+	CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP311]),
 	CLKDEV_DEV_ID("sh_cmt.0", &mstp_clks[MSTP124]),
 	CLKDEV_DEV_ID("qspi.0", &mstp_clks[MSTP917]),
 	CLKDEV_DEV_ID("e61f0000.thermal", &mstp_clks[MSTP522]),
@@ -286,6 +327,12 @@ void __init r8a7791_clock_init(void)
 		ret = clk_register(main_clks[k]);
 
 	if (!ret)
+		ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
+
+	if (!ret)
+		ret = sh_clk_div6_register(div6_clks, DIV6_NR);
+
+	if (!ret)
 		ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
 
 	clkdev_add_table(lookups, ARRAY_SIZE(lookups));