README: replace reference to boards.cfg

[oweals/u-boot.git] / drivers / clk / clk-hsdk-cgu.c

diff --git a/drivers/clk/clk-hsdk-cgu.c b/drivers/clk/clk-hsdk-cgu.c
index 64bb1db821a13f28fb1aab859d31ce73c29c99d1..6eaafdeaf996fc082eac086b69967950fdf48e7d 100644 (file)
--- a/drivers/clk/clk-hsdk-cgu.c
+++ b/drivers/clk/clk-hsdk-cgu.c
@@ -46,21 +46,23 @@
  *            |        |-->|CGU_TUN_IDIV_ROM|----------->
  *            |        |-->|CGU_TUN_IDIV_PWM|----------->
  *            |
- *            |   ------------
- *            |-->| HDMI PLL |
- *            |   ------------
- *            |        |
- *            |        |-->|CGU_HDMI_IDIV_APB|------>
- *            |
  *            |   -----------
  *            |-->| DDR PLL |
  *                -----------
  *                     |
  *                     |---------------------------->
+ *
+ *   ------------------
+ *   | 27.00 MHz xtal |
+ *   ------------------
+ *            |
+ *            |   ------------
+ *            |-->| HDMI PLL |
+ *                ------------
+ *                     |
+ *                     |-->|CGU_HDMI_IDIV_APB|------>
  */
 
-DECLARE_GLOBAL_DATA_PTR;
-
 #define CGU_ARC_IDIV           0x080
 #define CGU_TUN_IDIV_TUN       0x380
 #define CGU_TUN_IDIV_ROM       0x390
@@ -119,7 +121,8 @@ DECLARE_GLOBAL_DATA_PTR;
 #define CREG_CORE_IF_CLK_DIV_2         0x1
 
 #define MIN_PLL_RATE                   100000000 /* 100 MHz */
-#define PARENT_RATE                    33333333 /* fixed clock - xtal */
+#define PARENT_RATE_33                 33333333 /* fixed clock - xtal */
+#define PARENT_RATE_27                 27000000 /* fixed clock - xtal */
 #define CGU_MAX_CLOCKS                 26
 
 #define CGU_SYS_CLOCKS                 16
@@ -141,7 +144,7 @@ struct hsdk_tun_clk_cfg {
 
 static const struct hsdk_tun_clk_cfg tun_clk_cfg = {
        { 25000000,  50000000,  75000000,  100000000, 125000000, 150000000 },
-       { 600000000, 600000000, 600000000, 600000000, 700000000, 600000000 }, {
+       { 600000000, 600000000, 600000000, 600000000, 750000000, 600000000 }, {
        { CGU_TUN_IDIV_TUN,     { 24,   12,     8,      6,      6,      4 } },
        { CGU_TUN_IDIV_ROM,     { 4,    4,      4,      4,      5,      4 } },
        { CGU_TUN_IDIV_PWM,     { 8,    8,      8,      8,      10,     8 } }
@@ -202,6 +205,7 @@ static const struct hsdk_pll_cfg asdt_pll_cfg[] = {
        { 500000000,  0, 14, 1, 0 },
        { 600000000,  0, 17, 1, 0 },
        { 700000000,  0, 20, 1, 0 },
+       { 750000000,  1, 44, 1, 0 },
        { 800000000,  0, 23, 1, 0 },
        { 900000000,  1, 26, 0, 0 },
        { 1000000000, 1, 29, 0, 0 },
@@ -239,6 +243,7 @@ struct hsdk_cgu_clk {
 };
 
 struct hsdk_pll_devdata {
+       const u32 parent_rate;
        const struct hsdk_pll_cfg *pll_cfg;
        int (*update_rate)(struct hsdk_cgu_clk *clk, unsigned long rate,
                           const struct hsdk_pll_cfg *cfg);
@@ -250,16 +255,19 @@ static int hsdk_pll_comm_update_rate(struct hsdk_cgu_clk *, unsigned long,
                                     const struct hsdk_pll_cfg *);
 
 static const struct hsdk_pll_devdata core_pll_dat = {
+       .parent_rate = PARENT_RATE_33,
        .pll_cfg = asdt_pll_cfg,
        .update_rate = hsdk_pll_core_update_rate,
 };
 
 static const struct hsdk_pll_devdata sdt_pll_dat = {
+       .parent_rate = PARENT_RATE_33,
        .pll_cfg = asdt_pll_cfg,
        .update_rate = hsdk_pll_comm_update_rate,
 };
 
 static const struct hsdk_pll_devdata hdmi_pll_dat = {
+       .parent_rate = PARENT_RATE_27,
        .pll_cfg = hdmi_pll_cfg,
        .update_rate = hsdk_pll_comm_update_rate,
 };
@@ -374,19 +382,20 @@ static ulong pll_get(struct clk *sclk)
        u64 rate;
        u32 idiv, fbdiv, odiv;
        struct hsdk_cgu_clk *clk = dev_get_priv(sclk->dev);
+       u32 parent_rate = clk->pll_devdata->parent_rate;
 
        val = hsdk_pll_read(clk, CGU_PLL_CTRL);
 
        pr_debug("current configurarion: %#x\n", val);
 
+       /* Check if PLL is bypassed */
+       if (val & CGU_PLL_CTRL_BYPASS)
+               return parent_rate;
+
        /* Check if PLL is disabled */
        if (val & CGU_PLL_CTRL_PD)
                return 0;
 
-       /* Check if PLL is bypassed */
-       if (val & CGU_PLL_CTRL_BYPASS)
-               return PARENT_RATE;
-
        /* input divider = reg.idiv + 1 */
        idiv = 1 + ((val & CGU_PLL_CTRL_IDIV_MASK) >> CGU_PLL_CTRL_IDIV_SHIFT);
        /* fb divider = 2*(reg.fbdiv + 1) */
@@ -394,7 +403,7 @@ static ulong pll_get(struct clk *sclk)
        /* output divider = 2^(reg.odiv) */
        odiv = 1 << ((val & CGU_PLL_CTRL_ODIV_MASK) >> CGU_PLL_CTRL_ODIV_SHIFT);
 
-       rate = (u64)PARENT_RATE * fbdiv;
+       rate = (u64)parent_rate * fbdiv;
        do_div(rate, idiv * odiv);
 
        return rate;
@@ -492,7 +501,8 @@ static ulong pll_set(struct clk *sclk, ulong rate)
                }
        }
 
-       pr_err("invalid rate=%ld, parent_rate=%d\n", best_rate, PARENT_RATE);
+       pr_err("invalid rate=%ld Hz, parent_rate=%d Hz\n", best_rate,
+              clk->pll_devdata->parent_rate);
 
        return -EINVAL;
 }
@@ -623,14 +633,14 @@ static ulong idiv_set(struct clk *sclk, ulong rate)
        }
 
        if (div_factor & ~CGU_IDIV_MASK) {
-               pr_err("invalid rate=%ld, parent_rate=%ld, div=%d: max divider valie is%d\n",
+               pr_err("invalid rate=%ld Hz, parent_rate=%ld Hz, div=%d: max divider valie is%d\n",
                       rate, parent_rate, div_factor, CGU_IDIV_MASK);
 
                div_factor = CGU_IDIV_MASK;
        }
 
        if (div_factor == 0) {
-               pr_err("invalid rate=%ld, parent_rate=%ld, div=%d: min divider valie is 1\n",
+               pr_err("invalid rate=%ld Hz, parent_rate=%ld Hz, div=%d: min divider valie is 1\n",
                       rate, parent_rate, div_factor);
 
                div_factor = 1;