linux-kernel - [PATCH v2 6/7] clk: meson: eeclk: add init regs

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Date:   Mon, 13 May 2019 14:31:14 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Neil Armstrong <narmstrong@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     Jerome Brunet <jbrunet@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 6/7] clk: meson: eeclk: add init regs

Like the PLL and MPLL, the controller may require some magic setting to
be applied on startup.

This is needed when the initial setting is not applied by the boot ROM.
The controller need to do it when the setting applies to several clock,
like all the MPLLs in the case of g12a.

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
 drivers/clk/meson/meson-eeclk.c | 3 +++
 drivers/clk/meson/meson-eeclk.h | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/clk/meson/meson-eeclk.c b/drivers/clk/meson/meson-eeclk.c
index 37a34c9c3885..6ba2094be257 100644
--- a/drivers/clk/meson/meson-eeclk.c
+++ b/drivers/clk/meson/meson-eeclk.c
@@ -34,6 +34,9 @@ int meson_eeclkc_probe(struct platform_device *pdev)
 		return PTR_ERR(map);
 	}
 
+	if (data->init_count)
+		regmap_multi_reg_write(map, data->init_regs, data->init_count);
+
 	input = meson_clk_hw_register_input(dev, "xtal", IN_PREFIX "xtal", 0);
 	if (IS_ERR(input)) {
 		ret = PTR_ERR(input);
diff --git a/drivers/clk/meson/meson-eeclk.h b/drivers/clk/meson/meson-eeclk.h
index 1b809b1419fe..9ab5d6fa7ccb 100644
--- a/drivers/clk/meson/meson-eeclk.h
+++ b/drivers/clk/meson/meson-eeclk.h
@@ -17,6 +17,8 @@ struct platform_device;
 struct meson_eeclkc_data {
 	struct clk_regmap *const	*regmap_clks;
 	unsigned int			regmap_clk_num;
+	const struct reg_sequence	*init_regs;
+	unsigned int			init_count;
 	struct clk_hw_onecell_data	*hw_onecell_data;
 };
 
-- 
2.20.1