kernel.git/arch/mips/alchemy/common/clock.c, branch linux-3.18.y

MIPS: Alchemy: Fix cpu clock calculation

2015-03-06T22:52:54Z

commit 69e4e63ec816a7e22cc3aa14bc7ef4ac734d370c upstream. The current code uses bits 0-6 of the sys_cpupll register to calculate core clock speed. However this is only valid on Au1300, on all earlier models the hardware only uses bits 0-5 to generate core clock. This fixes clock calculation on the MTX1 (Au1500), where bit 6 of cpupll is set as well, which ultimately lead the code to calculate a bogus cpu core clock and also uart base clock down the line. Signed-off-by: Manuel Lauss Reported-by: John Crispin Tested-by: Bruno Randolf Cc: Linux-MIPS Patchwork: https://patchwork.linux-mips.org/patch/9279/ Signed-off-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman

MIPS: Alchemy: remove old clock support

2014-07-30T12:12:00Z

With the clock framework in place, remove unused functions and bits, and drop the CLK_IGNORE_UNUSED flag, which is now unneeded. Signed-off-by: Manuel Lauss Cc: Linux-MIPS Patchwork: https://patchwork.linux-mips.org/patch/7473/ Signed-off-by: Ralf Baechle

MIPS: Alchemy: clock framework integration of onchip clocks

2014-07-30T12:08:42Z

This patch introduces common clock framework integration for all configurable on-chip clocks on Alchemy chips: - 2 or 3 PLLs which generate integer multiples of the root rate 12MHz, - 6 dividers which take one of the 3 PLLs as input and divide their rate by either multiples of 2 or 1 (Au1300). - another bank of up to 6 muxes which take either one of the 6 above dividers or one of the PLLs directly and divide their rate further by 1, 2, 3 or 4. - a few other sources which are used by onchip peripherals and are informational. This implementation will take the clock tree as it was set up by boot firmware: all in-kernel boards should continue to work without having to set up the clock tree in board code. CLK_IGNORE_DISABLED will be removed once all drivers have been converted. Signed-off-by: Manuel Lauss Cc: Mike Turquette Cc: Linux-MIPS Patchwork: https://patchwork.linux-mips.org/patch/7466/ Signed-off-by: Ralf Baechle