diff options
author | Simon Glass <sjg@chromium.org> | 2012-04-02 13:18:47 (GMT) |
---|---|---|
committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-05-15 06:31:37 (GMT) |
commit | ffc76482c2d86ca29168527e57fb75c0ea08ec6d (patch) | |
tree | 3a238ea8f71feb6320c8e34ec296c1df2f905e9e /arch/arm/include/asm/arch-tegra2/clock.h | |
parent | f9f3e1b8df9804c98a2a3077d0acb24247e0e74b (diff) | |
download | u-boot-ffc76482c2d86ca29168527e57fb75c0ea08ec6d.tar.xz |
tegra: Add functions to access low-level Osc/PLL details
Add clock_ll_read_pll() to read PLL parameters and clock_get_osc_bypass()
to find out if the Oscillator is bypassed. These are needed by warmboot.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'arch/arm/include/asm/arch-tegra2/clock.h')
-rw-r--r-- | arch/arm/include/asm/arch-tegra2/clock.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-tegra2/clock.h b/arch/arm/include/asm/arch-tegra2/clock.h index 6b12c76..1d3ae38 100644 --- a/arch/arm/include/asm/arch-tegra2/clock.h +++ b/arch/arm/include/asm/arch-tegra2/clock.h @@ -210,6 +210,21 @@ enum clock_osc_freq clock_get_osc_freq(void); unsigned long clock_start_pll(enum clock_id id, u32 divm, u32 divn, u32 divp, u32 cpcon, u32 lfcon); +/** + * Read low-level parameters of a PLL. + * + * @param id clock id to read (note: USB is not supported) + * @param divm returns input divider + * @param divn returns feedback divider + * @param divp returns post divider 2^n + * @param cpcon returns charge pump setup control + * @param lfcon returns loop filter setup control + * + * @returns 0 if ok, -1 on error (invalid clock id) + */ +int clock_ll_read_pll(enum clock_id clkid, u32 *divm, u32 *divn, + u32 *divp, u32 *cpcon, u32 *lfcon); + /* * Enable a clock * @@ -368,6 +383,13 @@ void clock_ll_start_uart(enum periph_id periph_id); */ enum periph_id clock_decode_periph_id(const void *blob, int node); +/** + * Checks if the oscillator bypass is enabled (XOBP bit) + * + * @return 1 if bypass is enabled, 0 if not + */ +int clock_get_osc_bypass(void); + /* * Checks that clocks are valid and prints a warning if not * |