ARM: OMAP: Add support for forcing osc_ck on
Some boards might use the oscillator clock for powering external peripherals. Add support for making sure osc_ck stays active even when trying to go to sleep. Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
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2 changed files with 19 additions and 1 deletions
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@ -81,6 +81,14 @@ static void omap2_propagate_rate(struct clk * clk)
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propagate_rate(clk);
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propagate_rate(clk);
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}
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}
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static void omap2_set_osc_ck(int enable)
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{
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if (enable)
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PRCM_CLKSRC_CTRL &= ~(0x3 << 3);
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else
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PRCM_CLKSRC_CTRL |= 0x3 << 3;
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}
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/* Enable an APLL if off */
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/* Enable an APLL if off */
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static void omap2_clk_fixed_enable(struct clk *clk)
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static void omap2_clk_fixed_enable(struct clk *clk)
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{
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{
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@ -121,6 +129,11 @@ static int _omap2_clk_enable(struct clk * clk)
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if (clk->flags & ALWAYS_ENABLED)
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if (clk->flags & ALWAYS_ENABLED)
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return 0;
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return 0;
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if (unlikely(clk == &osc_ck)) {
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omap2_set_osc_ck(1);
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return 0;
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}
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if (unlikely(clk->enable_reg == 0)) {
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if (unlikely(clk->enable_reg == 0)) {
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printk(KERN_ERR "clock.c: Enable for %s without enable code\n",
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printk(KERN_ERR "clock.c: Enable for %s without enable code\n",
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clk->name);
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clk->name);
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@ -158,6 +171,11 @@ static void _omap2_clk_disable(struct clk *clk)
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{
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{
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u32 regval32;
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u32 regval32;
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if (unlikely(clk == &osc_ck)) {
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omap2_set_osc_ck(0);
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return;
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}
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if (clk->enable_reg == 0)
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if (clk->enable_reg == 0)
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return;
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return;
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@ -560,7 +560,7 @@ static struct clk osc_ck = { /* (*12, *13, 19.2, *26, 38.4)MHz */
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.name = "osc_ck",
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.name = "osc_ck",
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.rate = 26000000, /* fixed up in clock init */
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.rate = 26000000, /* fixed up in clock init */
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.flags = CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X |
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.flags = CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X |
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RATE_FIXED | ALWAYS_ENABLED | RATE_PROPAGATES,
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RATE_FIXED | RATE_PROPAGATES,
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};
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};
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/* With out modem likely 12MHz, with modem likely 13MHz */
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/* With out modem likely 12MHz, with modem likely 13MHz */
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