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author | Tony Lindgren <tony@atomide.com> | 2011-03-11 09:20:03 -0800 |
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committer | Tony Lindgren <tony@atomide.com> | 2011-03-11 09:20:03 -0800 |
commit | a2358a7bc35e388978fc2f7f6b071a0fd27d78c1 (patch) | |
tree | fbdc2ddb066243a11aebc490c4d54e6a42be51e2 /arch/arm/mach-omap2/dpll44xx.c | |
parent | 94a06b74e724caabcf0464c81527cfbcae0c8aff (diff) | |
parent | a08572ae529b1e8de12393eeced661feae8fd44c (diff) | |
download | talos-op-linux-a2358a7bc35e388978fc2f7f6b071a0fd27d78c1.tar.gz talos-op-linux-a2358a7bc35e388978fc2f7f6b071a0fd27d78c1.zip |
Merge branch 'integration-2.6.39-for-tony' of git://git.pwsan.com/linux-integration into omap-for-linus
Conflicts:
arch/arm/mach-omap2/pm34xx.c
Diffstat (limited to 'arch/arm/mach-omap2/dpll44xx.c')
-rw-r--r-- | arch/arm/mach-omap2/dpll44xx.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/dpll44xx.c b/arch/arm/mach-omap2/dpll44xx.c new file mode 100644 index 000000000000..4e4da6160d05 --- /dev/null +++ b/arch/arm/mach-omap2/dpll44xx.c @@ -0,0 +1,84 @@ +/* + * OMAP4-specific DPLL control functions + * + * Copyright (C) 2011 Texas Instruments, Inc. + * Rajendra Nayak + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/bitops.h> + +#include <plat/cpu.h> +#include <plat/clock.h> + +#include "clock.h" +#include "cm-regbits-44xx.h" + +/* Supported only on OMAP4 */ +int omap4_dpllmx_gatectrl_read(struct clk *clk) +{ + u32 v; + u32 mask; + + if (!clk || !clk->clksel_reg || !cpu_is_omap44xx()) + return -EINVAL; + + mask = clk->flags & CLOCK_CLKOUTX2 ? + OMAP4430_DPLL_CLKOUTX2_GATE_CTRL_MASK : + OMAP4430_DPLL_CLKOUT_GATE_CTRL_MASK; + + v = __raw_readl(clk->clksel_reg); + v &= mask; + v >>= __ffs(mask); + + return v; +} + +void omap4_dpllmx_allow_gatectrl(struct clk *clk) +{ + u32 v; + u32 mask; + + if (!clk || !clk->clksel_reg || !cpu_is_omap44xx()) + return; + + mask = clk->flags & CLOCK_CLKOUTX2 ? + OMAP4430_DPLL_CLKOUTX2_GATE_CTRL_MASK : + OMAP4430_DPLL_CLKOUT_GATE_CTRL_MASK; + + v = __raw_readl(clk->clksel_reg); + /* Clear the bit to allow gatectrl */ + v &= ~mask; + __raw_writel(v, clk->clksel_reg); +} + +void omap4_dpllmx_deny_gatectrl(struct clk *clk) +{ + u32 v; + u32 mask; + + if (!clk || !clk->clksel_reg || !cpu_is_omap44xx()) + return; + + mask = clk->flags & CLOCK_CLKOUTX2 ? + OMAP4430_DPLL_CLKOUTX2_GATE_CTRL_MASK : + OMAP4430_DPLL_CLKOUT_GATE_CTRL_MASK; + + v = __raw_readl(clk->clksel_reg); + /* Set the bit to deny gatectrl */ + v |= mask; + __raw_writel(v, clk->clksel_reg); +} + +const struct clkops clkops_omap4_dpllmx_ops = { + .allow_idle = omap4_dpllmx_allow_gatectrl, + .deny_idle = omap4_dpllmx_deny_gatectrl, +}; + |