clk: zynqmp: fix kernel doc

Add missing description of 'custom_type_flag' structure member.

Fixes: e605fa9c4a0c ("clk: zynqmp: Add support for custom type flags")
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Link: https://lore.kernel.org/r/1629720433-19019-1-git-send-email-rajan.vaja@xilinx.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

clk: zynqmp: Use firmware specific mux clock flags

Use ZynqMP specific mux clock flags instead of using CCF flags.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Link: https://lore.kernel.org/r/20210628070122.26217-4-rajan.vaja@xilinx.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

clk: zynqmp: Use firmware specific divider clock flags

Use ZynqMP specific divider clock flags instead of using CCF flags.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Link: https://lore.kernel.org/r/20210628070122.26217-3-rajan.vaja@xilinx.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

clk: zynqmp: Use firmware specific common clock flags

Currently firmware passes CCF specific flags to ZynqMP clock driver.
So firmware needs to be updated if CCF flags are changed. The firmware
should have its own 'flag number space' that is distinct from the
common clk framework's 'flag number space'. So define and use ZynqMP
specific common clock flags instead of using CCF flags.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Link: https://lore.kernel.org/r/20210628070122.26217-2-rajan.vaja@xilinx.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

clk: zynqmp: Add support for custom type flags

Store extra custom type flags received from firmware.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Link: https://lkml.kernel.org/r/1584048699-24186-2-git-send-email-jolly.shah@xilinx.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

clk: zynqmp: use structs for clk query responses

The driver retrieves the clock tree by querying the ATF for the clock
names, the clock topology, the parents and other attributes. The driver
needs to unmarshal the responses.

The definition of the fields in the firmware responses to the queries is
inconsistent. Some are specified as a mask, some as a shift, and by the
length of the previous field.

Define C structs for the entire firmware responses to avoid passing
pointers to arrays of an implicit size and make the format of the
responses to the queries obvious.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Reviewed-by: Jolly Shah <jolly.shah@xilinx.com>
[sboyd@kernel.org: Drop 0 initializers because sparse complains]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers: clk: Add ZynqMP clock driver

This patch adds CCF compliant clock driver for ZynqMP.
Clock driver queries supported clock information from
firmware and regiters pll and output clocks with CCF.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Tejas Patel <tejasp@xilinx.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Acked-by: Olof Johansson <olof@lixom.net>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>