diff options
Diffstat (limited to 'arch/arm/mach-omap2/clkt2xxx_osc.c')
| -rw-r--r-- | arch/arm/mach-omap2/clkt2xxx_osc.c | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/arch/arm/mach-omap2/clkt2xxx_osc.c b/arch/arm/mach-omap2/clkt2xxx_osc.c index df7b8050648..0717dff1bc0 100644 --- a/arch/arm/mach-omap2/clkt2xxx_osc.c +++ b/arch/arm/mach-omap2/clkt2xxx_osc.c @@ -23,40 +23,47 @@ #include <linux/clk.h> #include <linux/io.h> -#include <plat/clock.h> - #include "clock.h" #include "clock2xxx.h" #include "prm2xxx_3xxx.h" #include "prm-regbits-24xx.h" -static int omap2_enable_osc_ck(struct clk *clk) +/* + * XXX This does not actually enable the osc_ck, since the osc_ck must + * be running for this function to be called. Instead, this function + * is used to disable an autoidle mode on the osc_ck. The existing + * clk_enable/clk_disable()-based usecounting for osc_ck should be + * replaced with autoidle-based usecounting. + */ +int omap2_enable_osc_ck(struct clk_hw *clk) { u32 pcc; - pcc = __raw_readl(prcm_clksrc_ctrl); + pcc = readl_relaxed(prcm_clksrc_ctrl); - __raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); + writel_relaxed(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); return 0; } -static void omap2_disable_osc_ck(struct clk *clk) +/* + * XXX This does not actually disable the osc_ck, since doing so would + * immediately halt the system. Instead, this function is used to + * enable an autoidle mode on the osc_ck. The existing + * clk_enable/clk_disable()-based usecounting for osc_ck should be + * replaced with autoidle-based usecounting. + */ +void omap2_disable_osc_ck(struct clk_hw *clk) { u32 pcc; - pcc = __raw_readl(prcm_clksrc_ctrl); + pcc = readl_relaxed(prcm_clksrc_ctrl); - __raw_writel(pcc | OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); + writel_relaxed(pcc | OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); } -const struct clkops clkops_oscck = { - .enable = omap2_enable_osc_ck, - .disable = omap2_disable_osc_ck, -}; - -unsigned long omap2_osc_clk_recalc(struct clk *clk) +unsigned long omap2_osc_clk_recalc(struct clk_hw *clk, + unsigned long parent_rate) { return omap2xxx_get_apll_clkin() * omap2xxx_get_sysclkdiv(); } - |