1 files changed, 58 insertions, 6 deletions

diff --git a/arch/arm/mach-at91/clock.c b/arch/arm/mach-at91/clock.c
index a33dfe450726..464bdbbf74df 100644
--- a/arch/arm/mach-at91/clock.c
+++ b/arch/arm/mach-at91/clock.c
@@ -112,12 +112,34 @@ static void pmc_sys_mode(struct clk *clk, int is_on)
                 at91_sys_write(AT91_PMC_SCDR, clk->pmc_mask);
 }
 
+static void pmc_uckr_mode(struct clk *clk, int is_on)
+{
+        unsigned int uckr = at91_sys_read(AT91_CKGR_UCKR);
+
+        if (is_on) {
+                is_on = AT91_PMC_LOCKU;
+                at91_sys_write(AT91_CKGR_UCKR, uckr | clk->pmc_mask);
+        } else
+                at91_sys_write(AT91_CKGR_UCKR, uckr & ~(clk->pmc_mask));
+
+        do {
+                cpu_relax();
+        } while ((at91_sys_read(AT91_PMC_SR) & AT91_PMC_LOCKU) != is_on);
+}
+
 /* USB function clocks (PLLB must be 48 MHz) */
 static struct clk udpck = {
         .name           = "udpck",
         .parent         = &pllb,
         .mode           = pmc_sys_mode,
 };
+static struct clk utmi_clk = {
+        .name           = "utmi_clk",
+        .parent         = &main_clk,
+        .pmc_mask       = AT91_PMC_UPLLEN,      /* in CKGR_UCKR */
+        .mode           = pmc_uckr_mode,
+        .type           = CLK_TYPE_PLL,
+};
 static struct clk uhpck = {
         .name           = "uhpck",
         .parent         = &pllb,
@@ -361,7 +383,7 @@ static void __init init_programmable_clock(struct clk *clk)
 
 static int at91_clk_show(struct seq_file *s, void *unused)
 {
-        u32             scsr, pcsr, sr;
+        u32             scsr, pcsr, uckr = 0, sr;
         struct clk      *clk;
 
         seq_printf(s, "SCSR = %8x\n", scsr = at91_sys_read(AT91_PMC_SCSR));
@@ -369,7 +391,10 @@ static int at91_clk_show(struct seq_file *s, void *unused)
         seq_printf(s, "MOR  = %8x\n", at91_sys_read(AT91_CKGR_MOR));
         seq_printf(s, "MCFR = %8x\n", at91_sys_read(AT91_CKGR_MCFR));
         seq_printf(s, "PLLA = %8x\n", at91_sys_read(AT91_CKGR_PLLAR));
-        seq_printf(s, "PLLB = %8x\n", at91_sys_read(AT91_CKGR_PLLBR));
+        if (!cpu_is_at91sam9rl())
+                seq_printf(s, "PLLB = %8x\n", at91_sys_read(AT91_CKGR_PLLBR));
+        if (cpu_is_at91cap9() || cpu_is_at91sam9rl())
+                seq_printf(s, "UCKR = %8x\n", uckr = at91_sys_read(AT91_CKGR_UCKR));
         seq_printf(s, "MCKR = %8x\n", at91_sys_read(AT91_PMC_MCKR));
         seq_printf(s, "SR   = %8x\n", sr = at91_sys_read(AT91_PMC_SR));
 
@@ -382,6 +407,8 @@ static int at91_clk_show(struct seq_file *s, void *unused)
                         state = (scsr & clk->pmc_mask) ? "on" : "off";
                 else if (clk->mode == pmc_periph_mode)
                         state = (pcsr & clk->pmc_mask) ? "on" : "off";
+                else if (clk->mode == pmc_uckr_mode)
+                        state = (uckr & clk->pmc_mask) ? "on" : "off";
                 else if (clk->pmc_mask)
                         state = (sr & clk->pmc_mask) ? "on" : "off";
                 else if (clk == &clk32k || clk == &main_clk)
@@ -488,14 +515,19 @@ static unsigned __init at91_pll_calc(unsigned main_freq, unsigned out_freq)
                 /*
                  * PLL input between 1MHz and 32MHz per spec, but lower
                  * frequences seem necessary in some cases so allow 100K.
+                 * Warning: some newer products need 2MHz min.
                  */
                 input = main_freq / i;
+                if (cpu_is_at91sam9g20() && input < 2000000)
+                        continue;
                 if (input < 100000)
                         continue;
                 if (input > 32000000)
                         continue;
 
                 mul1 = out_freq / input;
+                if (cpu_is_at91sam9g20() && mul > 63)
+                        continue;
                 if (mul1 > 2048)
                         continue;
                 if (mul1 < 2)
@@ -555,7 +587,8 @@ int __init at91_clock_init(unsigned long main_clock)
 
         /* report if PLLA is more than mildly overclocked */
         plla.rate_hz = at91_pll_rate(&plla, main_clock, at91_sys_read(AT91_CKGR_PLLAR));
-        if (plla.rate_hz > 209000000)
+        if ((!cpu_is_at91sam9g20() && plla.rate_hz > 209000000)
+           || (cpu_is_at91sam9g20() && plla.rate_hz > 800000000))
                 pr_info("Clocks: PLLA overclocked, %ld MHz\n", plla.rate_hz / 1000000);
 
         /*
@@ -570,7 +603,7 @@ int __init at91_clock_init(unsigned long main_clock)
                 uhpck.pmc_mask = AT91RM9200_PMC_UHP;
                 udpck.pmc_mask = AT91RM9200_PMC_UDP;
                 at91_sys_write(AT91_PMC_SCER, AT91RM9200_PMC_MCKUDP);
-        } else if (cpu_is_at91sam9260() || cpu_is_at91sam9261() || cpu_is_at91sam9263()) {
+        } else if (cpu_is_at91sam9260() || cpu_is_at91sam9261() || cpu_is_at91sam9263() || cpu_is_at91sam9g20()) {
                 uhpck.pmc_mask = AT91SAM926x_PMC_UHP;
                 udpck.pmc_mask = AT91SAM926x_PMC_UDP;
         } else if (cpu_is_at91cap9()) {
@@ -582,6 +615,17 @@ int __init at91_clock_init(unsigned long main_clock)
         uhpck.rate_hz = at91_usb_rate(&pllb, pllb.rate_hz, at91_pllb_usb_init);
 
         /*
+         * USB HS clock init
+         */
+        if (cpu_is_at91cap9() || cpu_is_at91sam9rl()) {
+                /*
+                 * multiplier is hard-wired to 40
+                 * (obtain the USB High Speed 480 MHz when input is 12 MHz)
+                 */
+                utmi_clk.rate_hz = 40 * utmi_clk.parent->rate_hz;
+        }
+
+        /*
          * MCK and CPU derive from one of those primary clocks.
          * For now, assume this parentage won't change.
          */
@@ -591,13 +635,21 @@ int __init at91_clock_init(unsigned long main_clock)
         freq /= (1 << ((mckr & AT91_PMC_PRES) >> 2));                           /* prescale */
         if (cpu_is_at91rm9200())
                 mck.rate_hz = freq / (1 + ((mckr & AT91_PMC_MDIV) >> 8));       /* mdiv */
-        else
-                mck.rate_hz = freq / (1 << ((mckr & AT91_PMC_MDIV) >> 8));      /* mdiv */
+        else if (cpu_is_at91sam9g20()) {
+                mck.rate_hz = (mckr & AT91_PMC_MDIV) ?
+                        freq / ((mckr & AT91_PMC_MDIV) >> 7) : freq;    /* mdiv ; (x >> 7) = ((x >> 8) * 2) */
+                if (mckr & AT91_PMC_PDIV)
+                        freq /= 2;              /* processor clock division */
+        } else
+                mck.rate_hz = freq / (1 << ((mckr & AT91_PMC_MDIV) >> 8));      /* mdiv */
 
         /* Register the PMC's standard clocks */
         for (i = 0; i < ARRAY_SIZE(standard_pmc_clocks); i++)
                 list_add_tail(&standard_pmc_clocks[i]->node, &clocks);
 
+        if (cpu_is_at91cap9() || cpu_is_at91sam9rl())
+                list_add_tail(&utmi_clk.node, &clocks);
+
         /* MCK and CPU clock are "always on" */
         clk_enable(&mck);