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: [PATCH 1/2] clk: imx: composite-8m: Add DRAM clock registration variant
Date: Wed, 21 Oct 2020 15:40:42 +0300 [thread overview]
Message-ID: <1603284043-27059-2-git-send-email-abel.vesa@nxp.com> (raw)
In-Reply-To: <1603284043-27059-1-git-send-email-abel.vesa@nxp.com>
The switch between parents for dram_apb and dram_alt is done in EL3,
so lets mark the mux and divider as read only with the CLK_DIVIDER_READ_ONLY
and CLK_MUX_READ_ONLY flags.
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
---
drivers/clk/imx/clk-composite-8m.c | 7 +++++++
drivers/clk/imx/clk.h | 6 ++++++
2 files changed, 13 insertions(+)
diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-composite-8m.c
index 2c309e3..c3231eb 100644
--- a/drivers/clk/imx/clk-composite-8m.c
+++ b/drivers/clk/imx/clk-composite-8m.c
@@ -211,6 +211,13 @@ struct clk_hw *imx8m_clk_hw_composite_flags(const char *name,
div->width = PCG_PREDIV_WIDTH;
divider_ops = &imx8m_clk_composite_divider_ops;
mux_ops = &imx8m_clk_composite_mux_ops;
+ } else if (composite_flags & IMX_COMPOSITE_DRAM) {
+ div->shift = PCG_PREDIV_SHIFT;
+ div->width = PCG_PREDIV_WIDTH;
+ div->flags = CLK_DIVIDER_READ_ONLY;
+ mux->flags = CLK_MUX_READ_ONLY;
+ divider_ops = &clk_divider_ops;
+ mux_ops = &clk_mux_ops;
} else {
div->shift = PCG_PREDIV_SHIFT;
div->width = PCG_PREDIV_WIDTH;
diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
index 3b796b3..70c57d2 100644
--- a/drivers/clk/imx/clk.h
+++ b/drivers/clk/imx/clk.h
@@ -535,6 +535,7 @@ struct clk_hw *imx_clk_hw_cpu(const char *name, const char *parent_name,
#define IMX_COMPOSITE_CORE BIT(0)
#define IMX_COMPOSITE_BUS BIT(1)
+#define IMX_COMPOSITE_DRAM BIT(2)
struct clk_hw *imx8m_clk_hw_composite_flags(const char *name,
const char * const *parent_names,
@@ -565,6 +566,11 @@ struct clk_hw *imx8m_clk_hw_composite_flags(const char *name,
ARRAY_SIZE(parent_names), reg, 0, \
flags | CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE)
+#define __imx8m_clk_hw_composite_dram(name, parent_names, reg, flags) \
+ imx8m_clk_hw_composite_flags(name, parent_names, \
+ ARRAY_SIZE(parent_names), reg, IMX_COMPOSITE_DRAM, \
+ flags | CLK_GET_RATE_NOCACHE | CLK_OPS_PARENT_ENABLE)
+
#define __imx8m_clk_composite(name, parent_names, reg, flags) \
to_clk(__imx8m_clk_hw_composite(name, parent_names, reg, flags))
--
2.7.4
next prev parent reply other threads:[~2020-10-21 12:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-21 12:40 [PATCH 0/2] clk: imx: Make the dram_apb and dram_alt as read-only Abel Vesa
2020-10-21 12:40 ` Abel Vesa [this message]
2020-10-21 12:40 ` [PATCH 2/2] clk: imx8m: Use dram variant registration for dram clocks Abel Vesa
2020-10-21 14:35 ` [PATCH 0/2] clk: imx: Make the dram_apb and dram_alt as read-only Abel Vesa
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1603284043-27059-2-git-send-email-abel.vesa@nxp.com \
--to=abel.vesa@nxp.com \
--cc=aisheng.dong@nxp.com \
--cc=anson.huang@nxp.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=peng.fan@nxp.com \
--cc=sboyd@kernel.org \
--cc=shawnguo@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).