linux-kernel - [RFC PATCH 01/11] clk: imx: add structure to extend register accesses

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Date:   Sat, 31 Dec 2022 11:47:26 +0100
From:   Dario Binacchi <dario.binacchi@...rulasolutions.com>
To:     linux-kernel@...r.kernel.org
Cc:     tommaso.merciai@...rulasolutions.com,
        linux-amarula@...rulasolutions.com,
        Chen-Yu Tsai <wenst@...omium.org>, jagan@...rulasolutions.com,
        angelo@...rulasolutions.com, anthony@...rulasolutions.com,
        michael@...rulasolutions.com,
        Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Abel Vesa <abelvesa@...nel.org>,
        Fabio Estevam <festevam@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org
Subject: [RFC PATCH 01/11] clk: imx: add structure to extend register accesses

The imx_clk_reg structure allows accessing both registers that belong to
specific modules and those that are registered in syscon through the use
of the regmap API.
This is a preparation patch for the upcoming support to setup clocks
directly from the device tree.

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
---

 drivers/clk/imx/clk.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
index 689b3ad927c0..86538c990a0d 100644
--- a/drivers/clk/imx/clk.h
+++ b/drivers/clk/imx/clk.h
@@ -89,6 +89,18 @@ struct imx_fracn_gppll_clk {
 	int flags;
 };
 
+/**
+ * struct imx_clk_reg - imx register declaration
+ * @base: the register base address
+ * @regmap: the register map
+ * @offset: the offset within @base or @regmap
+ */
+struct imx_clk_reg {
+	void __iomem *base;
+	struct regmap *regmap;
+	u16 offset;
+};
+
 struct clk_hw *imx_clk_fracn_gppll(const char *name, const char *parent_name, void __iomem *base,
 				   const struct imx_fracn_gppll_clk *pll_clk);
 
-- 
2.32.0