1. 28 Aug, 2013 9 commits
  2. 27 Aug, 2013 4 commits
  3. 26 Aug, 2013 6 commits
  4. 23 Aug, 2013 1 commit
  5. 22 Aug, 2013 1 commit
    • Mike Turquette's avatar
      clk: handle NULL struct clk gracefully · 89ac8d7a
      Mike Turquette authored
      At some point changes to clk_set_rate and clk_set_parent introduced a
      bug whereby NULL struct clk pointers were treated as an error. This is
      in violation of the API in include/linux/clk.h. Reintroduce graceful
      handling of NULL clk's by bailing from clk_set_rate and clk_set_parent
      with return codes of zero.
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      89ac8d7a
  6. 20 Aug, 2013 3 commits
  7. 19 Aug, 2013 5 commits
    • James Hogan's avatar
      clk: clk-mux: implement remuxing on set_rate · e366fdd7
      James Hogan authored
      Implement clk-mux remuxing if the CLK_SET_RATE_NO_REPARENT flag isn't
      set. This implements determine_rate for clk-mux to propagate to each
      parent and to choose the best one (like clk-divider this chooses the
      parent which provides the fastest rate <= the requested rate).
      
      The determine_rate op is implemented as a core helper function so that
      it can be easily used by more complex clocks which incorporate muxes.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
      Cc: Mike Turquette <mturquette@linaro.org>
      Cc: linux-arm-kernel@lists.infradead.org
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      e366fdd7
    • James Hogan's avatar
      clk: add CLK_SET_RATE_NO_REPARENT flag · 819c1de3
      James Hogan authored
      Add a CLK_SET_RATE_NO_REPARENT clock flag, which will prevent muxes
      being reparented during clk_set_rate.
      
      To avoid breaking existing platforms, all callers of clk_register_mux()
      are adjusted to pass the new flag. Platform maintainers are encouraged
      to remove the flag if they wish to allow mux reparenting on set_rate.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
      Cc: Mike Turquette <mturquette@linaro.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Sascha Hauer <kernel@pengutronix.de>
      Cc: Stephen Warren <swarren@wwwdotorg.org>
      Cc: Viresh Kumar <viresh.linux@gmail.com>
      Cc: Kukjin Kim <kgene.kim@samsung.com>
      Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
      Cc: Chao Xie <xiechao.mail@gmail.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: "Emilio López" <emilio@elopez.com.ar>
      Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
      Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
      Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
      Cc: Thierry Reding <thierry.reding@gmail.com>
      Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
      Cc: Pawel Moll <pawel.moll@arm.com>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Andrew Chew <achew@nvidia.com>
      Cc: Doug Anderson <dianders@chromium.org>
      Cc: Heiko Stuebner <heiko@sntech.de>
      Cc: Paul Walmsley <pwalmsley@nvidia.com>
      Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
      Cc: Thomas Abraham <thomas.abraham@linaro.org>
      Cc: Tomasz Figa <t.figa@samsung.com>
      Cc: linux-arm-kernel@lists.infradead.org
      Cc: linux-samsung-soc@vger.kernel.org
      Cc: spear-devel@list.st.com
      Cc: linux-tegra@vger.kernel.org
      Tested-by: default avatarHaojian Zhuang <haojian.zhuang@gmail.com>
      Acked-by: Stephen Warren <swarren@nvidia.com> [tegra]
      Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> [sunxi]
      Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com> [Zynq]
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      819c1de3
    • James Hogan's avatar
      clk: add support for clock reparent on set_rate · 71472c0c
      James Hogan authored
      Add core support to allow clock implementations to select the best
      parent clock when rounding a rate, e.g. the one which can provide the
      closest clock rate to that requested. This is by way of adding a new
      clock op, determine_rate(), which is like round_rate() but has an extra
      parameter to allow the clock implementation to optionally select a
      different parent clock. The core then takes care of reparenting the
      clock when setting the rate.
      
      The parent change takes place with the help of some new private data
      members. struct clk::new_parent specifies a clock's new parent (NULL
      indicates no change), and struct clk::new_child specifies a clock's new
      child (whose new_parent member points back to it). The purpose of these
      are to allow correct walking of the future tree for notifications prior
      to actually reparenting any clocks, specifically to skip child clocks
      who are being reparented to another clock (they will be notified via the
      new parent), and to include any new child clock. These pointers are set
      by clk_calc_subtree(), and the new_child pointer gets cleared when a
      child is actually reparented to avoid duplicate POST_RATE_CHANGE
      notifications.
      
      Each place where round_rate() is called, determine_rate() is checked
      first and called in preference. This restructures a few of the call
      sites to simplify the logic into if/else blocks.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
      Cc: Mike Turquette <mturquette@linaro.org>
      Cc: linux-arm-kernel@lists.infradead.org
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      71472c0c
    • James Hogan's avatar
      clk: move some parent related functions upwards · 4935b22c
      James Hogan authored
      Move some parent related functions up in clk.c so they can be used by
      the modifications in the following patch which enables clock reparenting
      during set_rate. No other changes are made so this patch makes no
      functional difference in isolation. This is separate from the following
      patch primarily to ease readability of that patch.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
      Cc: Mike Turquette <mturquette@linaro.org>
      Cc: linux-arm-kernel@lists.infradead.org
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      4935b22c
    • James Hogan's avatar
      clk: abstract parent cache · 7ef3dcc8
      James Hogan authored
      Abstract access to the clock parent cache by defining
      clk_get_parent_by_index(clk, index). This allows access to parent
      clocks from clock drivers.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
      Cc: Mike Turquette <mturquette@linaro.org>
      Cc: linux-arm-kernel@lists.infradead.org
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      7ef3dcc8
  8. 16 Aug, 2013 3 commits
  9. 09 Aug, 2013 1 commit
  10. 08 Aug, 2013 7 commits