diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-06 19:13:58 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-06 19:13:58 -0800 |
commit | 01539ba2a706ab7d35fc0667dff919ade7f87d63 (patch) | |
tree | 5a4bd0cf78007d06690fe4ac06bbd49a5a70bc47 /arch/arm/mach-omap2/dpll3xxx.c | |
parent | 9e9bc9736756f25d6c47b4eba0ebf25b20a6f153 (diff) | |
parent | dc69d1af9e8d9cbbabff88bb35a6782187a22229 (diff) |
Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (243 commits)
omap2: Make OMAP2PLUS select OMAP_DM_TIMER
OMAP4: hwmod data: Fix alignment and end of line in structurefields
OMAP4: hwmod data: Move the DMA structures
OMAP4: hwmod data: Move the smartreflex structures
OMAP4: hwmod data: Fix missing SIDLE_SMART_WKUP in smartreflexsysc
arm: omap: tusb6010: add name for MUSB IRQ
arm: omap: craneboard: Add USB EHCI support
omap2+: Initialize serial port for dynamic remuxing for n8x0
omap2+: Add struct omap_board_data and use it for platform level serial init
omap2+: Allow hwmod state changes to mux pads based on the state changes
omap2+: Add support for hwmod specific muxing of devices
omap2+: Add omap_mux_get_by_name
OMAP2: PM: fix compile error when !CONFIG_SUSPEND
MAINTAINERS: OMAP: hwmod: update hwmod code, data maintainership
OMAP4: Smartreflex framework extensions
OMAP4: hwmod: Add inital data for smartreflex modules.
OMAP4: PM: Program correct init voltages for scalable VDDs
OMAP4: Adding voltage driver support
OMAP4: Register voltage PMIC parameters with the voltage layer
OMAP3: PM: Program correct init voltages for VDD1 and VDD2
...
Fix up trivial conflict in arch/arm/plat-omap/Kconfig
Diffstat (limited to 'arch/arm/mach-omap2/dpll3xxx.c')
-rw-r--r-- | arch/arm/mach-omap2/dpll3xxx.c | 57 |
1 files changed, 36 insertions, 21 deletions
diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.c index ebb888f59365..f77022be783d 100644 --- a/arch/arm/mach-omap2/dpll3xxx.c +++ b/arch/arm/mach-omap2/dpll3xxx.c @@ -32,9 +32,7 @@ #include <plat/clock.h> #include "clock.h" -#include "prm.h" -#include "prm-regbits-34xx.h" -#include "cm.h" +#include "cm2xxx_3xxx.h" #include "cm-regbits-34xx.h" /* CM_AUTOIDLE_PLL*.AUTO_* bit values */ @@ -225,10 +223,9 @@ static int _omap3_noncore_dpll_stop(struct clk *clk) } /** - * lookup_dco_sddiv - Set j-type DPLL4 compensation variables + * _lookup_dco - Lookup DCO used by j-type DPLL * @clk: pointer to a DPLL struct clk * @dco: digital control oscillator selector - * @sd_div: target sigma-delta divider * @m: DPLL multiplier to set * @n: DPLL divider to set * @@ -237,11 +234,9 @@ static int _omap3_noncore_dpll_stop(struct clk *clk) * XXX This code is not needed for 3430/AM35xx; can it be optimized * out in non-multi-OMAP builds for those chips? */ -static void lookup_dco_sddiv(struct clk *clk, u8 *dco, u8 *sd_div, u16 m, - u8 n) +static void _lookup_dco(struct clk *clk, u8 *dco, u16 m, u8 n) { - unsigned long fint, clkinp, sd; /* watch out for overflow */ - int mod1, mod2; + unsigned long fint, clkinp; /* watch out for overflow */ clkinp = clk->parent->rate; fint = (clkinp / n) * m; @@ -250,6 +245,27 @@ static void lookup_dco_sddiv(struct clk *clk, u8 *dco, u8 *sd_div, u16 m, *dco = 2; else *dco = 4; +} + +/** + * _lookup_sddiv - Calculate sigma delta divider for j-type DPLL + * @clk: pointer to a DPLL struct clk + * @sd_div: target sigma-delta divider + * @m: DPLL multiplier to set + * @n: DPLL divider to set + * + * See 36xx TRM section 3.5.3.3.3.2 "Type B DPLL (Low-Jitter)" + * + * XXX This code is not needed for 3430/AM35xx; can it be optimized + * out in non-multi-OMAP builds for those chips? + */ +static void _lookup_sddiv(struct clk *clk, u8 *sd_div, u16 m, u8 n) +{ + unsigned long clkinp, sd; /* watch out for overflow */ + int mod1, mod2; + + clkinp = clk->parent->rate; + /* * target sigma-delta to near 250MHz * sd = ceil[(m/(n+1)) * (clkinp_MHz / 250)] @@ -278,6 +294,7 @@ static void lookup_dco_sddiv(struct clk *clk, u8 *dco, u8 *sd_div, u16 m, static int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel) { struct dpll_data *dd = clk->dpll_data; + u8 dco, sd_div; u32 v; /* 3430 ES2 TRM: 4.7.6.9 DPLL Programming Sequence */ @@ -300,18 +317,16 @@ static int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel) v |= m << __ffs(dd->mult_mask); v |= (n - 1) << __ffs(dd->div1_mask); - /* - * XXX This code is not needed for 3430/AM35XX; can it be optimized - * out in non-multi-OMAP builds for those chips? - */ - if ((dd->flags & DPLL_J_TYPE) && !(dd->flags & DPLL_NO_DCO_SEL)) { - u8 dco, sd_div; - lookup_dco_sddiv(clk, &dco, &sd_div, m, n); - /* XXX This probably will need revision for OMAP4 */ - v &= ~(OMAP3630_PERIPH_DPLL_DCO_SEL_MASK - | OMAP3630_PERIPH_DPLL_SD_DIV_MASK); - v |= dco << __ffs(OMAP3630_PERIPH_DPLL_DCO_SEL_MASK); - v |= sd_div << __ffs(OMAP3630_PERIPH_DPLL_SD_DIV_MASK); + /* Configure dco and sd_div for dplls that have these fields */ + if (dd->dco_mask) { + _lookup_dco(clk, &dco, m, n); + v &= ~(dd->dco_mask); + v |= dco << __ffs(dd->dco_mask); + } + if (dd->sddiv_mask) { + _lookup_sddiv(clk, &sd_div, m, n); + v &= ~(dd->sddiv_mask); + v |= sd_div << __ffs(dd->sddiv_mask); } __raw_writel(v, dd->mult_div1_reg); |