clk: sunxi: Move mbus to mod0 file

Move the MBUS clock to the module clocks file. It's pretty trivial, but still
requires to enable the clocks to make sure it won't get disabled.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>

drivers/clk/sunxi/clk-mod0.c

@@ -80,3 +80,15 @@ static void __init sun4i_a10_mod0_setup(struct device_node *node)
 	sunxi_factors_register(node, &sun4i_a10_mod0_data, &sun4i_a10_mod0_lock);
 }
 CLK_OF_DECLARE(sun4i_a10_mod0, "allwinner,sun4i-a10-mod0-clk", sun4i_a10_mod0_setup);
+
+static DEFINE_SPINLOCK(sun5i_a13_mbus_lock);
+
+static void __init sun5i_a13_mbus_setup(struct device_node *node)
+{
+	struct clk *mbus = sunxi_factors_register(node, &sun4i_a10_mod0_data, &sun5i_a13_mbus_lock);
+
+	/* The MBUS clocks needs to be always enabled */
+	__clk_get(mbus);
+	clk_prepare_enable(mbus);
+}
+CLK_OF_DECLARE(sun5i_a13_mbus, "allwinner,sun5i-a13-mbus-clk", sun5i_a13_mbus_setup);

drivers/clk/sunxi/clk-sunxi.c

@@ -320,46 +320,6 @@ static void sun4i_get_apb1_factors(u32 *freq, u32 parent_rate,
 
 
 
-/**
- * sun4i_get_mod0_factors() - calculates m, n factors for MOD0-style clocks
- * MOD0 rate is calculated as follows
- * rate = (parent_rate >> p) / (m + 1);
- */
-
-static void sun4i_get_mod0_factors(u32 *freq, u32 parent_rate,
-				   u8 *n, u8 *k, u8 *m, u8 *p)
-{
-	u8 div, calcm, calcp;
-
-	/* These clocks can only divide, so we will never be able to achieve
-	 * frequencies higher than the parent frequency */
-	if (*freq > parent_rate)
-		*freq = parent_rate;
-
-	div = DIV_ROUND_UP(parent_rate, *freq);
-
-	if (div < 16)
-		calcp = 0;
-	else if (div / 2 < 16)
-		calcp = 1;
-	else if (div / 4 < 16)
-		calcp = 2;
-	else
-		calcp = 3;
-
-	calcm = DIV_ROUND_UP(div, 1 << calcp);
-
-	*freq = (parent_rate >> calcp) / calcm;
-
-	/* we were called to round the frequency, we can now return */
-	if (n == NULL)
-		return;
-
-	*m = calcm - 1;
-	*p = calcp;
-}
-
-
 
 /**
  * sun7i_a20_get_out_factors() - calculates m, p factors for CLK_OUT_A/B
@@ -494,14 +454,6 @@ static struct clk_factors_config sun4i_apb1_config = {
 	.pwidth = 2,
 };
 
-/* user manual says "n" but it's really "p" */
-static struct clk_factors_config sun4i_mod0_config = {
-	.mshift = 0,
-	.mwidth = 4,
-	.pshift = 16,
-	.pwidth = 2,
-};
-
 /* user manual says "n" but it's really "p" */
 static struct clk_factors_config sun7i_a20_out_config = {
 	.mshift = 8,
@@ -559,13 +511,6 @@ static const struct factors_data sun4i_apb1_data __initconst = {
 	.getter = sun4i_get_apb1_factors,
 };
 
-static const struct factors_data sun4i_mod0_data __initconst = {
-	.enable = 31,
-	.mux = 24,
-	.table = &sun4i_mod0_config,
-	.getter = sun4i_get_mod0_factors,
-};
-
 static const struct factors_data sun7i_a20_out_data __initconst = {
 	.enable = 31,
 	.mux = 24,
@@ -1119,7 +1064,6 @@ static const struct of_device_id clk_factors_match[] __initconst = {
 	{.compatible = "allwinner,sun7i-a20-pll4-clk", .data = &sun7i_a20_pll4_data,},
 	{.compatible = "allwinner,sun6i-a31-pll6-clk", .data = &sun6i_a31_pll6_data,},
 	{.compatible = "allwinner,sun4i-a10-apb1-clk", .data = &sun4i_apb1_data,},
-	{.compatible = "allwinner,sun5i-a13-mbus-clk", .data = &sun4i_mod0_data,},
 	{.compatible = "allwinner,sun7i-a20-out-clk", .data = &sun7i_a20_out_data,},
 	{}
 };
@@ -1231,7 +1175,6 @@ static void __init sun4i_a10_init_clocks(struct device_node *node)
 CLK_OF_DECLARE(sun4i_a10_clk_init, "allwinner,sun4i-a10", sun4i_a10_init_clocks);
 
 static const char *sun5i_critical_clocks[] __initdata = {
-	"mbus",
 	"pll5_ddr",
 	"ahb_sdram",
 };