ARM: mach-shmobile: clock-r8a7779: add DIV4 clock support

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

diff --git a/arch/arm/mach-shmobile/clock-r8a7779.c b/arch/arm/mach-shmobile/clock-r8a7779.c
index 8a90106..29c3306 100644 (file)
--- a/arch/arm/mach-shmobile/clock-r8a7779.c
+++ b/arch/arm/mach-shmobile/clock-r8a7779.c
@@ -45,36 +45,75 @@ static struct clk_mapping cpg_mapping = {
        .len    = 0x80,
 };
 
-static struct clk clkp = {
-       .rate   = 62500000, /* FIXME: shortcut */
-       .flags  = CLK_ENABLE_ON_INIT,
-       .mapping = &cpg_mapping,
+/*
+ * Default rate for the root input clock, reset this with clk_set_rate()
+ * from the platform code.
+ */
+static struct clk plla_clk = {
+       .rate           = 1500000000,
+       .mapping        = &cpg_mapping,
 };
 
 static struct clk *main_clks[] = {
-       &clkp,
+       &plla_clk,
+};
+
+static int divisors[] = { 0, 0, 0, 6, 8, 12, 16, 0, 24, 32, 36, 0, 0, 0, 0, 0 };
+
+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_S, DIV4_OUT, DIV4_S4, DIV4_S3, DIV4_S1, DIV4_P, DIV4_NR };
+
+static struct clk div4_clks[DIV4_NR] = {
+       [DIV4_S]        = SH_CLK_DIV4(&plla_clk, FRQMR, 20,
+                                     0x0018, CLK_ENABLE_ON_INIT),
+       [DIV4_OUT]      = SH_CLK_DIV4(&plla_clk, FRQMR, 16,
+                                     0x0700, CLK_ENABLE_ON_INIT),
+       [DIV4_S4]       = SH_CLK_DIV4(&plla_clk, FRQMR, 12,
+                                     0x0040, CLK_ENABLE_ON_INIT),
+       [DIV4_S3]       = SH_CLK_DIV4(&plla_clk, FRQMR, 8,
+                                     0x0010, CLK_ENABLE_ON_INIT),
+       [DIV4_S1]       = SH_CLK_DIV4(&plla_clk, FRQMR, 4,
+                                     0x0060, CLK_ENABLE_ON_INIT),
+       [DIV4_P]        = SH_CLK_DIV4(&plla_clk, FRQMR, 0,
+                                     0x0300, CLK_ENABLE_ON_INIT),
 };
 
 enum { MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021,
        MSTP016, MSTP015, MSTP014,
        MSTP_NR };
 
-#define MSTP(_parent, _reg, _bit, _flags) \
-       SH_CLK_MSTP32(_parent, _reg, _bit, _flags)
-
 static struct clk mstp_clks[MSTP_NR] = {
-       [MSTP026] = MSTP(&clkp, MSTPCR0, 26, 0), /* SCIF0 */
-       [MSTP025] = MSTP(&clkp, MSTPCR0, 25, 0), /* SCIF1 */
-       [MSTP024] = MSTP(&clkp, MSTPCR0, 24, 0), /* SCIF2 */
-       [MSTP023] = MSTP(&clkp, MSTPCR0, 23, 0), /* SCIF3 */
-       [MSTP022] = MSTP(&clkp, MSTPCR0, 22, 0), /* SCIF4 */
-       [MSTP021] = MSTP(&clkp, MSTPCR0, 21, 0), /* SCIF5 */
-       [MSTP016] = MSTP(&clkp, MSTPCR0, 16, 0), /* TMU0 */
-       [MSTP015] = MSTP(&clkp, MSTPCR0, 15, 0), /* TMU1 */
-       [MSTP014] = MSTP(&clkp, MSTPCR0, 14, 0), /* TMU2 */
+       [MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0), /* SCIF0 */
+       [MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0), /* SCIF1 */
+       [MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0), /* SCIF2 */
+       [MSTP023] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 23, 0), /* SCIF3 */
+       [MSTP022] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 22, 0), /* SCIF4 */
+       [MSTP021] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 21, 0), /* SCIF5 */
+       [MSTP016] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 16, 0), /* TMU0 */
+       [MSTP015] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0), /* TMU1 */
+       [MSTP014] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 14, 0), /* TMU2 */
 };
 
 static struct clk_lookup lookups[] = {
+       /* main clocks */
+       CLKDEV_CON_ID("plla_clk", &plla_clk),
+
+       /* DIV4 clocks */
+       CLKDEV_CON_ID("shyway_clk",     &div4_clks[DIV4_S]),
+       CLKDEV_CON_ID("bus_clk",        &div4_clks[DIV4_OUT]),
+       CLKDEV_CON_ID("shyway4_clk",    &div4_clks[DIV4_S4]),
+       CLKDEV_CON_ID("shyway3_clk",    &div4_clks[DIV4_S3]),
+       CLKDEV_CON_ID("shyway1_clk",    &div4_clks[DIV4_S1]),
+       CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
+
        /* MSTP32 clocks */
        CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP016]), /* TMU00 */
        CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP016]), /* TMU01 */
@@ -94,6 +133,9 @@ void __init r8a7779_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_mstp32_register(mstp_clks, MSTP_NR);
 
        clkdev_add_table(lookups, ARRAY_SIZE(lookups));