linux.git/drivers/clk/mmp, branch v5.4.219

clk: mmp2: Fix the order of timer mux parents

2020-02-05T21:22:43+00:00

[ Upstream commit 8bea5ac0fbc5b2103f8779ddff216122e3c2e1ad ]

Determined empirically, no documentation is available.

The OLPC XO-1.75 laptop used parent 1, that one being VCTCXO/4 (65MHz), but
thought it's a VCTCXO/2 (130MHz). The mmp2 timer driver, not knowing
what is going on, ended up just dividing the rate as of
commit f36797ee4380 ("ARM: mmp/mmp2: dt: enable the clock")'

Link: https://lore.kernel.org/r/20191218190454.420358-3-lkundrak@v3.sk
Signed-off-by: Lubomir Rintel 
Acked-by: Stephen Boyd 
Signed-off-by: Olof Johansson 
Signed-off-by: Sasha Levin

clk: mmp: frac: Remove set but not used variable 'prev_rate'

2019-06-07T18:54:48+00:00

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/clk/mmp/clk-frac.c: In function clk_factor_set_rate:
drivers/clk/mmp/clk-frac.c:81:16: warning: variable prev_rate set but not used [-Wunused-but-set-variable]

It's never used and can be removed.

Signed-off-by: YueHaibing 
Signed-off-by: Stephen Boyd

clk: Remove CLK_IS_BASIC clk flag

2019-04-26T17:40:49+00:00

This flag was historically used to indicate that a clk is a "basic" type
of clk like a mux, divider, gate, etc. This never turned out to be very
useful though because it was hard to cleanly split "basic" clks from
other clks in a system. This one flag was a way for type introspection
and it just didn't scale. If anything, it was used by the TI clk driver
to indicate that a clk_hw wasn't contained in the SoC specific clk
structure. We can get rid of this define now that TI is finding those
clks a different way.

Cc: Tero Kristo 
Cc: Ralf Baechle 
Cc: Paul Burton 
Cc: James Hogan 
Cc: 
Cc: Thierry Reding 
Cc: Kevin Hilman 
Cc: 
Cc: 
Acked-by: Thierry Reding 
Signed-off-by: Stephen Boyd

clk: mmp2: separate LCDC peripheral clk form the display clock

2019-02-21T21:52:02+00:00

These are in fact two clocks, they shouldn't be exposed as one. One is
required for accessing LCD controller registers (peripheral clock), while
other (AXI clock) can be optionally used as a pixel clock source for the
panel.

LCDC can alternatively use different clocks than the Display 1 AXI clock
for generating the pixel clock: the second AXI clock (fixed in this
commit too), the HDMI PLL, or the AXI bus clock.

They should really be controlled independently.

Link: https://lists.freedesktop.org/archives/dri-devel/2019-January/203975.html
Signed-off-by: Lubomir Rintel 
Signed-off-by: Stephen Boyd

Revert "clk: mmp2: add SP clock"

2019-01-24T18:55:32+00:00

It seems that the kernel has no business managing this clock: once the SP
clock is disabled, it's not sufficient to just enable in order to bring the
SP core back up. Just let the firmware keep it enabled and don't expose it
to drivers.

This reverts commit fc27c2394d96fd19854b7e2d3f0e60df0d86fc90.

Link: https://lore.kernel.org/lkml/154783267051.169631.3197836544646625747@swboyd.mtv.corp.google.com/
Signed-off-by: Lubomir Rintel 
Signed-off-by: Stephen Boyd

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

2019-01-03T02:56:59+00:00

Pull input updates from Dmitry Torokhov:
 "A tiny pull request this merge window unfortunately, should get more
  material in for the next release:

   - new driver for Raspberry Pi's touchscreen (firmware interface)

   - miscellaneous input driver fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: elan_i2c - add ACPI ID for touchpad in ASUS Aspire F5-573G
  Input: atmel_mxt_ts - don't try to free unallocated kernel memory
  Input: drv2667 - fix indentation issues
  Input: touchscreen - fix coding style issue
  Input: add official Raspberry Pi's touchscreen driver
  Input: nomadik-ske-keypad - fix a loop timeout test
  Input: rotary-encoder - don't log EPROBE_DEFER to kernel log
  Input: olpc_apsp - remove set but not used variable 'np'
  Input: olpc_apsp - enable the SP clock
  Input: olpc_apsp - check FIFO status on open(), not probe()
  Input: olpc_apsp - drop CONFIG_OLPC dependency
  clk: mmp2: add SP clock
  dt-bindings: marvell,mmp2: Add clock id for the SP clock
  Input: ad7879 - drop platform data support

clk: mmp: Off by one in mmp_clk_add()

2018-12-03T17:54:48+00:00

The > comparison should be >= or we write one element beyond the end of
the unit->clk_table[] array.

(The unit->clk_table[] array is allocated in the mmp_clk_init() function
and it has unit->nr_clks elements).

Fixes: 4661fda10f8b ("clk: mmp: add basic support functions for DT support")
Signed-off-by: Dan Carpenter 
Signed-off-by: Stephen Boyd

clk: mmp2: add SP clock

2018-11-15T19:14:36+00:00

The "security processor", sometimes referred to as "wireless trusted
module" or "generic encrypt unit" is a low-power core present on MMP2,
that has nothing to do with security, wireless, trust or encryption.

On an OLPC machine it runs CForth and serves as a keyboard controller:
http://dev.laptop.org/git/users/wmb/cforth/tree/src/app/arm-xo-1.75/ps2.fth

The register address was obtained from the OLPC kernel, since the
datasheet seems to be the Marvell's most important business secret.

Signed-off-by: Lubomir Rintel 
Acked-by: Stephen Boyd 
Acked-by: Pavel Machek 
Signed-off-by: Dmitry Torokhov

clk: mmp2: fix the clock id for sdh2_clk and sdh3_clk

2018-10-17T16:02:31+00:00

A typo that makes it impossible to get the correct clocks for
MMP2_CLK_SDH2 and MMP2_CLK_SDH3.

Signed-off-by: Lubomir Rintel 
Fixes: 1ec770d92a62 ("clk: mmp: add mmp2 DT support for clock driver")
Signed-off-by: Stephen Boyd

Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

2017-11-18T04:04:24+00:00

Pull clk updates from Stephen Boyd:
 "We have two changes to the core framework this time around.

  The first being a large change that introduces runtime PM support to
  the clk framework. Now we properly call runtime PM operations on the
  device providing a clk when the clk is in use. This helps on SoCs
  where the clks provided by a device need something to be powered on
  before using the clks, like power domains or regulators. It also helps
  power those things down when clks aren't in use.

  The other core change is a devm API addition for clk providers so we
  can get rid of a bunch of clk driver remove functions that are just
  doing of_clk_del_provider().

  Outside of the core, we have the usual addition of clk drivers and
  smattering of non-critical fixes to existing drivers. The biggest diff
  is support for Mediatek MT2712 and MT7622 SoCs, but those patches
  really just add a bunch of data.

  By the way, we're trying something new here where we build the tree up
  with topic branches. We plan to work this into our workflow so that we
  don't step on each other's toes, and so the fixes branch can be merged
  on an as-needed basis.

  Summary:

  Core:
   - runtime PM support for clk providers
   - devm API for of_clk_add_hw_provider()

  New Drivers:
   - Mediatek MT2712 and MT7622
   - Renesas R-Car V3M SoC

  Updates:
   - runtime PM support for Samsung exynos5433/exynos4412 providers
   - removal of clkdev aliases on Samsung SoCs
   - convert clk-gpio to use gpio descriptors
   - various driver cleanups to match kernel coding style
   - Amlogic Video Processing Unit VPU and VAPB clks
   - sigma-delta modulation for Allwinner audio PLLs
   - Allwinner A83t Display clks
   - support for the second display unit clock on Renesas RZ/G1E
   - suspend/resume support for Renesas R-Car Gen3 CPG/MSSR
   - new clock ids for Rockchip rk3188 and rk3368 SoCs
   - various 'const' markings on clk_ops structures
   - RPM clk support on Qualcomm MSM8996/MSM8660 SoCs"

* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (137 commits)
  clk: stm32h7: fix test of clock config
  clk: pxa: fix building on older compilers
  clk: sunxi-ng: a83t: Fix i2c buses bits
  clk: ti: dra7-atl-clock: fix child-node lookups
  clk: qcom: common: fix legacy board-clock registration
  clk: uniphier: fix DAPLL2 clock rate of Pro5
  clk: uniphier: fix parent of miodmac clock data
  clk: hi3798cv200: correct parent mux clock for 'clk_sdio0_ciu'
  clk: hisilicon: Delete an error message for a failed memory allocation in hisi_register_clkgate_sep()
  clk: hi3660: fix incorrect uart3 clock freqency
  clk: kona-setup: Delete error messages for failed memory allocations
  ARC: clk: fix spelling mistake: "configurarion" -> "configuration"
  clk: cdce925: remove redundant check for non-null parent_name
  clk: versatile: Improve sizeof() usage
  clk: versatile: Delete error messages for failed memory allocations
  clk: ux500: Improve sizeof() usage
  clk: ux500: Delete error messages for failed memory allocations
  clk: spear: Delete error messages for failed memory allocations
  clk: ti: Delete error messages for failed memory allocations
  clk: mmp: Adjust checks for NULL pointers
  ...