[RFC 0/4] clk: imx: Register the dram_apb and dram_alt as read-only

From: Abel Vesa <abel.vesa@nxp.com>
To: Shawn Guo <shawnguo@kernel.org>, Stephen Boyd <sboyd@kernel.org>,
	Peng Fan <peng.fan@nxp.com>, Dong Aisheng <aisheng.dong@nxp.com>,
	Anson Huang <anson.huang@nxp.com>
Cc: NXP Linux Team <linux-imx@nxp.com>,
	linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Abel Vesa <abel.vesa@nxp.com>
Subject: [RFC 0/4] clk: imx: Register the dram_apb and dram_alt as read-only
Date: Wed, 21 Oct 2020 20:36:51 +0300	[thread overview]
Message-ID: <1603301815-24670-1-git-send-email-abel.vesa@nxp.com> (raw)

On i.MX8M platforms the dram_apb and dram_alt are controlled from EL3.
So in order to keep track of the actual clock tree in kernel, we need
to actually declare the clocks but never write to any of their registes.
We do that by registering the clocks with only the ops that read but
never write the registers.

Abel Vesa (4):
  clk: Add CLK_GET_PARENT_NOCACHE flag
  clk: Add clk_gate_ro_ops for read-only gate clocks
  clk: imx: composite-8m: Add DRAM clock registration variant
  clk: imx8m: Use dram variant registration for dram clocks

 drivers/clk/clk-gate.c             |  5 +++++
 drivers/clk/clk.c                  | 31 +++++++++++++++++--------------
 drivers/clk/imx/clk-composite-8m.c | 12 +++++++++++-
 drivers/clk/imx/clk-imx8mm.c       |  4 ++--
 drivers/clk/imx/clk-imx8mn.c       |  4 ++--
 drivers/clk/imx/clk-imx8mp.c       |  4 ++--
 drivers/clk/imx/clk-imx8mq.c       |  4 ++--
 drivers/clk/imx/clk.h              |  7 +++++++
 include/linux/clk-provider.h       |  2 ++
 9 files changed, 50 insertions(+), 23 deletions(-)

-- 
2.7.4