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linux/drivers/clk
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Uwe Kleine-König da321133b5 clk: divider: fix calculation of maximal parent rate for a given divider 
The rate provided at the output of a clk-divider is calculated as:

	DIV_ROUND_UP(parent_rate, div)

since commit b11d282dbe (clk: divider: fix rate calculation for
fractional rates). So to yield a rate not bigger than r parent_rate
must be <= r * div.

The effect of choosing a parent rate that is too big as was done before
this patch results in wrongly ruling out good dividers.

Note that this is not a complete fix as __clk_round_rate might return a
value >= its 2nd parameter. Also for dividers with
CLK_DIVIDER_ROUND_CLOSEST set the calculation is not accurate. But this
fixes the test case by Sascha Hauer that uses a chain of three dividers
under a fixed clock.

Fixes: b11d282dbe (clk: divider: fix rate calculation for fractional rates)
Suggested-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
 		2015-03-09 14:19:27 -07:00
..
at91 The clock framework changes for 3.20 contain the usual driver additions, 2015-02-21 12:30:30 -08:00
bcm clk: Add rate constraints to clocks 2015-02-02 14:23:42 -08:00
berlin clk: berlin: bg2q: remove non-exist "smemc" gate clock 2015-01-13 10:58:43 -08:00
hisilicon clk: Add rate constraints to clocks 2015-02-02 14:23:42 -08:00
keystone clk: keystone: gate: fix clk_init_data initialization 2014-02-10 15:17:43 -05:00
mmp clk: Add rate constraints to clocks 2015-02-02 14:23:42 -08:00
mvebu clk: mvebu: add suspend/resume for gatable clocks 2014-11-30 16:40:12 +00:00
mxs Revert "clk: mxs: Fix invalid 32-bit access to frac registers" 2015-02-18 10:13:26 -08:00
pxa clk: Replace explicit clk assignment with __clk_hw_set_clk 2015-02-18 09:40:11 -08:00
qcom clk: qcom: fix platform_no_drv_owner.cocci warnings 2015-02-25 12:14:35 -08:00
rockchip The clock framework changes for 3.20 contain the usual driver additions, 2015-02-21 12:30:30 -08:00
samsung The clock framework changes for 3.20 contain the usual driver additions, 2015-02-21 12:30:30 -08:00
shmobile The clock framework changes for 3.20 contain the usual driver additions, 2015-02-21 12:30:30 -08:00
sirf clk: sirf: update copyright years to 2014 2014-03-26 21:47:35 -07:00
socfpga Adds support getting the divider registers for the MAIN PLL that was once 2014-05-12 19:11:13 -07:00
spear Merge branch 'clk-fixes' into clk-next 2014-07-13 07:56:45 -07:00
st clk: Replace explicit clk assignment with __clk_hw_set_clk 2015-02-18 09:40:11 -08:00
sunxi The clock framework changes for 3.20 contain the usual driver additions, 2015-02-21 12:30:30 -08:00
tegra clk: Replace explicit clk assignment with __clk_hw_set_clk 2015-02-18 09:40:11 -08:00
ti clk: ti: Fix FAPLL parent enable bit handling 2015-02-25 12:06:29 -08:00
ux500 clk: ux500: Drop use of clk-private.h 2015-01-27 11:56:33 -08:00
versatile ARM: vexpress: Remove non-DT code 2014-11-28 16:08:16 +01:00
x86 clk: x86: drop owner assignment from platform_drivers 2014-10-20 16:20:23 +02:00
zynq clk: zynq: Force CPU_2X clock to be ungated 2015-01-27 17:00:24 -08:00
Kconfig The clock framework changes for 3.20 contain the usual driver additions, 2015-02-21 12:30:30 -08:00
Makefile ARM: clk: add clk-asm9260 driver 2015-01-20 10:10:51 -08:00
clk-asm9260.c ARM: clk: add clk-asm9260 driver 2015-01-20 10:10:51 -08:00
clk-axi-clkgen.c clk: Remove .owner field for driver 2014-09-25 17:43:31 -07:00
clk-axm5516.c clk: drop owner assignment from platform_drivers 2014-10-20 16:20:22 +02:00
clk-bcm2835.c ARM: bcm2835: remove custom .init_time hook 2013-09-29 21:09:24 +02:00
clk-cdce706.c clk: TI CDCE706 clock synthesizer driver 2015-01-17 13:52:40 -08:00
clk-clps711x.c clk: Add CLPS711X clk driver 2014-07-28 23:30:46 -07:00
clk-composite.c clk: Replace explicit clk assignment with __clk_hw_set_clk 2015-02-18 09:40:11 -08:00
clk-conf.c clk: Add missing of_clk_set_defaults export 2014-08-04 09:48:39 -07:00
clk-devres.c
…
clk-divider.c clk: divider: fix calculation of maximal parent rate for a given divider 2015-03-09 14:19:27 -07:00
clk-efm32gg.c clk/efm32gg: fix dt init prototype 2014-09-09 13:52:18 -07:00
clk-fixed-factor.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
clk-fixed-rate.c clk: add accuracy support for fixed clock 2013-12-22 23:14:28 -08:00
clk-fractional-divider.c clk: fractional-divider: cast parent_rate to u64 before multiplying 2014-09-10 09:42:37 -07:00
clk-gate.c clk-gate: fix bit # check in clk_register_gate() 2015-01-20 10:09:05 -08:00
clk-gpio-gate.c clk: gpio-gate: Ensure gpiod_ APIs are prototyped 2014-09-30 11:57:54 -07:00
clk-highbank.c ARM: highbank: remove custom .init_time hook 2013-09-29 21:09:29 +02:00
clk-ls1x.c clk: ls1x: Update relationship among all clocks 2014-11-24 07:45:09 +01:00
clk-max-gen.c clk: Add generic driver for Maxim PMIC clocks 2014-09-09 13:55:44 -07:00
clk-max-gen.h clk: Add generic driver for Maxim PMIC clocks 2014-09-09 13:55:44 -07:00
clk-max77686.c clk: Remove .owner field for driver 2014-09-25 17:43:31 -07:00
clk-max77802.c clk: Remove .owner field for driver 2014-09-25 17:43:31 -07:00
clk-moxart.c clk: add MOXA ART SoCs clock driver 2014-03-18 17:13:14 -07:00
clk-mux.c clk: Add clk_unregister_{divider, gate, mux} to close memory leak 2015-01-17 13:52:41 -08:00
clk-nomadik.c clk: nomadik: fix multiplatform problem 2014-02-26 11:14:44 -08:00
clk-nspire.c
…
clk-palmas.c clk: Remove .owner field for driver 2014-09-25 17:43:31 -07:00
clk-qoriq.c clk: qoriq: Add support for the platform PLL 2015-02-18 09:56:43 -08:00
clk-rk808.c clk: RK808: add clkout driver for RK808 2014-10-14 02:18:18 +02:00
clk-s2mps11.c Please consider pulling the clk framework changes toward 3.19. It is 2014-12-20 16:42:36 -08:00
clk-si570.c clk: si570: Fix email address specifiction 2014-05-20 16:18:18 +02:00
clk-si5351.c The second half of the clock framework pull requeust for 3.14 is 2014-01-28 18:44:53 -08:00
clk-si5351.h clk: si5351: remove variant from platform_data 2014-01-27 11:20:22 -08:00
clk-twl6040.c clk: Remove .owner field for driver 2014-09-25 17:43:31 -07:00
clk-u300.c clk: u300: Terminate of match table 2014-05-27 18:29:04 -07:00
clk-vt8500.c clk: vt8500: Staticize vtwm_pll_ops 2013-12-19 17:47:32 -08:00
clk-wm831x.c clk: Remove .owner field for driver 2014-09-25 17:43:31 -07:00
clk-xgene.c clk: Add APM X-Gene SoC clock driver 2013-10-07 11:22:15 -07:00
clk.c The clock framework changes for 3.20 contain the usual driver additions, 2015-02-21 12:30:30 -08:00
clk.h clkdev: Always allocate a struct clk and call __clk_get() w/ CCF 2015-02-06 17:53:20 -08:00
clkdev.c clkdev: Always allocate a struct clk and call __clk_get() w/ CCF 2015-02-06 17:53:20 -08:00