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  15. Feb 27, 2014
    • Dinh Nguyen's avatar
      net: stmmac: Add SOCFPGA glue driver · 2d237c06
      Dinh Nguyen authored 
      

Like the STi series SOCs, Altera's SOCFPGA also needs a glue layer on top of the
Synopsys gmac IP.

This patch adds the platform driver for the glue layer which configures the IP
before the generic STMMAC driver takes over.

Signed-off-by: default avatarDinh Nguyen <dinguyen@altera.com>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
---
v3: Remove stray empty line at end of dwmac-socfpga.c.
v2: Use the dwmac-sti as an example for a glue layer and split patch up
to have dts as a separate patch. Also cc dts maintainers since there is
a new binding.
      2d237c06
  17. Feb 26, 2014
  19. Feb 25, 2014
    • Kumar Gala's avatar
      gpio: msm: switch Kconfig to ARCH_QCOM depends · add798a4
      Kumar Gala authored 
      

We've split Qualcomm MSM support into legacy and multiplatform.  The gpio
msm-v2 driver is only relevant on the multiplatform supported SoCs so
switch the Kconfig depends to ARCH_QCOM.

CC: Linus Walleij <linus.walleij@linaro.org>
Acked-by: default avatarAlexandre Courbot <gnurou@gmail.com>
Signed-off-by: default avatarKumar Gala <galak@codeaurora.org>
      add798a4
    • Alex Elder's avatar
      clk: bcm281xx: don't disable unused peripheral clocks · 1a5823c9
      Alex Elder authored 
      

Add the CLK_IGNORE_UNUSED flag when setting up a peripheral clock.
This prevents unused clocks from getting disabled, and by doing
this we can use the common clock code even before we've resolved
all the spots that need to get a reference to their clock.

Signed-off-by: default avatarAlex Elder <elder@linaro.org>
Reviewed-by: default avatarMatt Porter <mporter@linaro.org>
Acked-by: default avatarMike Turquette <mturquette@linaro.org>
Signed-off-by: default avatarMatt Porter <mporter@linaro.org>
      1a5823c9
    • Alex Elder's avatar
      clk: bcm281xx: add initial clock framework support · 1f27f152
      Alex Elder authored 
      

Add code for device tree support of clocks in the BCM281xx family of
SoCs.  Machines in this family use peripheral clocks implemented by
"Kona" clock control units (CCUs).  (Other Broadcom SoC families use
Kona style CCUs as well, but support for them is not yet upstream.)

A BCM281xx SoC has multiple CCUs, each of which manages a set of
clocks on the SoC.  A Kona peripheral clock is composite clock that
may include a gate, a parent clock multiplexor, and zero, one
or two dividers.  There is a variety of gate types, and many gates
implement hardware-managed gating (often called "auto-gating").
Most dividers divide their input clock signal by an integer value
(one or more).  There are also "fractional" dividers which allow
division by non-integer values.  To accomodate such dividers,
clock rates and dividers are generally maintained by the code in
"scaled" form, which allows integer and fractional dividers to
be handled in a uniform way.

If present, the gate for a Kona peripheral clock must be enabled
when a change is made to its multiplexor or one of its dividers.
Additionally, dividers and multiplexors have trigger registers which
must be used whenever the divider value or selected parent clock is
changed.  The same trigger is often used for a divider and
multiplexor, and a BCM281xx peripheral clock occasionally has two
triggers.

The gate, dividers, and parent clock selector are treated in this
code as "components" of a peripheral clock.  Their functionality is
implemented directly--e.g. the common clock framework gate
implementation is not used for a Kona peripheral clock gate.  (This
has being considered though, and the intention is to evolve this
code to leverage common code as much as possible.)

The source code is divided into three general portions:

    drivers/clk/bcm/clk-kona.h
    drivers/clk/bcm/clk-kona.c
        These implement the basic Kona clock functionality,
        including the clk_ops methods and various routines to
        manipulate registers and interpret their values.  This
        includes some functions used to set clocks to a desired
        initial state (though this feature is only partially
        implemented here).

    drivers/clk/bcm/clk-kona-setup.c
        This contains generic run-time initialization code for
        data structures representing Kona CCUs and clocks.  This
        encapsulates the clock structure initialization that can't
        be done statically.  Note that there is a great deal of
        validity-checking code here, making explicit certain
        assumptions in the code.   This is mostly useful for adding
        new clock definitions and could possibly be disabled for
        production use.

    drivers/clk/bcm/clk-bcm281xx.c
        This file defines the specific CCUs used by BCM281XX family
        SoCs, as well as the specific clocks implemented by each.
        It declares a device tree clock match entry for each CCU
        defined.

    include/dt-bindings/clock/bcm281xx.h
        This file defines the selector (index) values used to
        identify a particular clock provided by a CCU.  It consists
        entirely of C preprocessor constants, to be used by both the
        C source and device tree source files.

Signed-off-by: default avatarAlex Elder <elder@linaro.org>
Reviewed-by: default avatarTim Kryger <tim.kryger@linaro.org>
Reviewed-by: default avatarMatt Porter <mporter@linaro.org>
Acked-by: default avatarMike Turquette <mturquette@linaro.org>
Signed-off-by: default avatarMatt Porter <mporter@linaro.org>
      1f27f152
  21. Feb 24, 2014