ARM: mach-shmobile: clock-sh7372: FSI parent select support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 80 insertions, 37 deletions

diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index f879eb3c342..1e7beee7908 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -546,27 +546,6 @@ static struct platform_device *qhd_devices[] __initdata = {
 
 /* FSI */
 #define IRQ_FSI         evt2irq(0x1840)
-#define FSIACKCR        0xE6150018
-static void fsiackcr_init(struct clk *clk)
-{
-        u32 status = __raw_readl(clk->enable_reg);
-
-        /* use external clock */
-        status &= ~0x000000ff;
-        status |= 0x00000080;
-        __raw_writel(status, clk->enable_reg);
-}
-
-static struct clk_ops fsiackcr_clk_ops = {
-        .init = fsiackcr_init,
-};
-
-static struct clk fsiackcr_clk = {
-        .ops            = &fsiackcr_clk_ops,
-        .enable_reg     = (void __iomem *)FSIACKCR,
-        .rate           = 0, /* unknown */
-};
-
 static struct sh_fsi_platform_info fsi_info = {
         .porta_flags = SH_FSI_BRS_INV |
                        SH_FSI_OUT_SLAVE_MODE |
@@ -817,6 +796,47 @@ out:
 
 device_initcall(hdmi_init_pm_clock);
 
+#define FSIACK_DUMMY_RATE 48000
+static int __init fsi_init_pm_clock(void)
+{
+        struct clk *fsia_ick;
+        int ret;
+
+        /*
+         * FSIACK is connected to AK4642,
+         * and the rate is depend on playing sound rate.
+         * So, set dummy rate (= 48k) here
+         */
+        ret = clk_set_rate(&sh7372_fsiack_clk, FSIACK_DUMMY_RATE);
+        if (ret < 0) {
+                pr_err("Cannot set FSIACK dummy rate: %d\n", ret);
+                return ret;
+        }
+
+        fsia_ick = clk_get(&fsi_device.dev, "icka");
+        if (IS_ERR(fsia_ick)) {
+                ret = PTR_ERR(fsia_ick);
+                pr_err("Cannot get FSI ICK: %d\n", ret);
+                return ret;
+        }
+
+        ret = clk_set_parent(fsia_ick, &sh7372_fsiack_clk);
+        if (ret < 0) {
+                pr_err("Cannot set FSI-A parent: %d\n", ret);
+                goto out;
+        }
+
+        ret = clk_set_rate(fsia_ick, FSIACK_DUMMY_RATE);
+        if (ret < 0)
+                pr_err("Cannot set FSI-A rate: %d\n", ret);
+
+out:
+        clk_put(fsia_ick);
+
+        return ret;
+}
+device_initcall(fsi_init_pm_clock);
+
 /*
  * FIXME !!
  *
@@ -1007,14 +1027,6 @@ static void __init ap4evb_init(void)
                 clk_put(clk);
         }
 
-        /* change parent of FSI A */
-        clk = clk_get(NULL, "fsia_clk");
-        if (!IS_ERR(clk)) {
-                clk_register(&fsiackcr_clk);
-                clk_set_parent(clk, &fsiackcr_clk);
-                clk_put(clk);
-        }
-
         /*
          * set irq priority, to avoid sound chopping
          * when NFS rootfs is used
diff --git a/arch/arm/mach-shmobile/clock-sh7372.c b/arch/arm/mach-shmobile/clock-sh7372.c
index 50c3971d3dc..4557084a2f0 100644
--- a/arch/arm/mach-shmobile/clock-sh7372.c
+++ b/arch/arm/mach-shmobile/clock-sh7372.c
@@ -292,6 +292,13 @@ struct clk sh7372_pllc2_clk = {
         .parent_num     = ARRAY_SIZE(pllc2_parent),
 };
 
+/* External input clock (pin name: FSIACK/FSIBCK ) */
+struct clk sh7372_fsiack_clk = {
+};
+
+struct clk sh7372_fsibck_clk = {
+};
+
 static struct clk *main_clks[] = {
         &sh7372_dv_clki_clk,
         &r_clk,
@@ -305,6 +312,8 @@ static struct clk *main_clks[] = {
         &pllc1_clk,
         &pllc1_div2_clk,
         &sh7372_pllc2_clk,
+        &sh7372_fsiack_clk,
+        &sh7372_fsibck_clk,
 };
 
 static void div4_kick(struct clk *clk)
@@ -357,7 +366,7 @@ static struct clk div4_clks[DIV4_NR] = {
 };
 
 enum { DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_FMSI, DIV6_FMSO,
-       DIV6_FSIA, DIV6_FSIB, DIV6_SUB, DIV6_SPU,
+       DIV6_SUB, DIV6_SPU,
        DIV6_VOU, DIV6_DSIT, DIV6_DSI0P, DIV6_DSI1P,
        DIV6_NR };
 
@@ -367,8 +376,6 @@ static struct clk div6_clks[DIV6_NR] = {
         [DIV6_VCK3] = SH_CLK_DIV6(&pllc1_div2_clk, VCLKCR3, 0),
         [DIV6_FMSI] = SH_CLK_DIV6(&pllc1_div2_clk, FMSICKCR, 0),
         [DIV6_FMSO] = SH_CLK_DIV6(&pllc1_div2_clk, FMSOCKCR, 0),
-        [DIV6_FSIA] = SH_CLK_DIV6(&pllc1_div2_clk, FSIACKCR, 0),
-        [DIV6_FSIB] = SH_CLK_DIV6(&pllc1_div2_clk, FSIBCKCR, 0),
         [DIV6_SUB] = SH_CLK_DIV6(&sh7372_extal2_clk, SUBCKCR, 0),
         [DIV6_SPU] = SH_CLK_DIV6(&pllc1_div2_clk, SPUCKCR, 0),
         [DIV6_VOU] = SH_CLK_DIV6(&pllc1_div2_clk, VOUCKCR, 0),
@@ -377,7 +384,7 @@ static struct clk div6_clks[DIV6_NR] = {
         [DIV6_DSI1P] = SH_CLK_DIV6(&pllc1_div2_clk, DSI1PCKCR, 0),
 };
 
-enum { DIV6_HDMI, DIV6_REPARENT_NR };
+enum { DIV6_HDMI, DIV6_FSIA, DIV6_FSIB, DIV6_REPARENT_NR };
 
 /* Indices are important - they are the actual src selecting values */
 static struct clk *hdmi_parent[] = {
@@ -387,9 +394,27 @@ static struct clk *hdmi_parent[] = {
         [3] = NULL,     /* pllc2_div4 not implemented yet */
 };
 
+static struct clk *fsiackcr_parent[] = {
+        [0] = &pllc1_div2_clk,
+        [1] = &sh7372_pllc2_clk,
+        [2] = &sh7372_fsiack_clk, /* external input for FSI A */
+        [3] = NULL,     /* setting prohibited */
+};
+
+static struct clk *fsibckcr_parent[] = {
+        [0] = &pllc1_div2_clk,
+        [1] = &sh7372_pllc2_clk,
+        [2] = &sh7372_fsibck_clk, /* external input for FSI B */
+        [3] = NULL,     /* setting prohibited */
+};
+
 static struct clk div6_reparent_clks[DIV6_REPARENT_NR] = {
         [DIV6_HDMI] = SH_CLK_DIV6_EXT(&pllc1_div2_clk, HDMICKCR, 0,
                                       hdmi_parent, ARRAY_SIZE(hdmi_parent), 6, 2),
+        [DIV6_FSIA] = SH_CLK_DIV6_EXT(&pllc1_div2_clk, FSIACKCR, 0,
+                                      fsiackcr_parent, ARRAY_SIZE(fsiackcr_parent), 6, 2),
+        [DIV6_FSIB] = SH_CLK_DIV6_EXT(&pllc1_div2_clk, FSIBCKCR, 0,
+                                      fsibckcr_parent, ARRAY_SIZE(fsibckcr_parent), 6, 2),
 };
 
 enum { MSTP001,
@@ -429,7 +454,7 @@ static struct clk mstp_clks[MSTP_NR] = {
         [MSTP201] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 1, 0), /* SCIFA3 */
         [MSTP200] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 0, 0), /* SCIFA4 */
         [MSTP329] = MSTP(&r_clk, SMSTPCR3, 29, 0), /* CMT10 */
-        [MSTP328] = MSTP(&div6_clks[DIV6_SPU], SMSTPCR3, 28, 0), /* FSIA */
+        [MSTP328] = MSTP(&div6_clks[DIV6_SPU], SMSTPCR3, 28, 0), /* FSI2 */
         [MSTP323] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 23, 0), /* IIC1 */
         [MSTP322] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 22, 0), /* USB0 */
         [MSTP314] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 14, 0), /* SDHI0 */
@@ -445,6 +470,7 @@ static struct clk mstp_clks[MSTP_NR] = {
 
 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
 #define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
+#define CLKDEV_ICK_ID(_cid, _did, _clk) { .con_id = _cid, .dev_id = _did, .clk = _clk }
 
 static struct clk_lookup lookups[] = {
         /* main clocks */
@@ -483,8 +509,8 @@ static struct clk_lookup lookups[] = {
         CLKDEV_CON_ID("vck3_clk", &div6_clks[DIV6_VCK3]),
         CLKDEV_CON_ID("fmsi_clk", &div6_clks[DIV6_FMSI]),
         CLKDEV_CON_ID("fmso_clk", &div6_clks[DIV6_FMSO]),
-        CLKDEV_CON_ID("fsia_clk", &div6_clks[DIV6_FSIA]),
-        CLKDEV_CON_ID("fsib_clk", &div6_clks[DIV6_FSIB]),
+        CLKDEV_CON_ID("fsia_clk", &div6_reparent_clks[DIV6_FSIA]),
+        CLKDEV_CON_ID("fsib_clk", &div6_reparent_clks[DIV6_FSIB]),
         CLKDEV_CON_ID("sub_clk", &div6_clks[DIV6_SUB]),
         CLKDEV_CON_ID("spu_clk", &div6_clks[DIV6_SPU]),
         CLKDEV_CON_ID("vou_clk", &div6_clks[DIV6_VOU]),
@@ -531,7 +557,10 @@ static struct clk_lookup lookups[] = {
         CLKDEV_DEV_ID("r8a66597_hcd.1", &mstp_clks[MSTP406]), /* USB1 */
         CLKDEV_DEV_ID("r8a66597_udc.1", &mstp_clks[MSTP406]), /* USB1 */
         CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[MSTP403]), /* KEYSC */
-        {.con_id = "ick", .dev_id = "sh-mobile-hdmi", .clk = &div6_reparent_clks[DIV6_HDMI]},
+
+        CLKDEV_ICK_ID("ick", "sh-mobile-hdmi", &div6_reparent_clks[DIV6_HDMI]),
+        CLKDEV_ICK_ID("icka", "sh_fsi2", &div6_reparent_clks[DIV6_FSIA]),
+        CLKDEV_ICK_ID("ickb", "sh_fsi2", &div6_reparent_clks[DIV6_FSIB]),
 };
 
 void __init sh7372_clock_init(void)
diff --git a/arch/arm/mach-shmobile/include/mach/sh7372.h b/arch/arm/mach-shmobile/include/mach/sh7372.h
index 9838fcf0308..147775a94bc 100644
--- a/arch/arm/mach-shmobile/include/mach/sh7372.h
+++ b/arch/arm/mach-shmobile/include/mach/sh7372.h
@@ -462,5 +462,7 @@ extern struct clk sh7372_extal2_clk;
 extern struct clk sh7372_dv_clki_clk;
 extern struct clk sh7372_dv_clki_div2_clk;
 extern struct clk sh7372_pllc2_clk;
+extern struct clk sh7372_fsiack_clk;
+extern struct clk sh7372_fsibck_clk;
 
 #endif /* __ASM_SH7372_H__ */