linux-kernel - [PATCH v1 5/9] clk: tegra114: remove emc to mc clock mux

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Message-ID: <20250225143501.68966-6-clamor95@gmail.com>
Date: Tue, 25 Feb 2025 16:34:57 +0200
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Svyatoslav Ryhel <clamor95@...il.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Georgi Djakov <djakov@...nel.org>,
	Dmitry Osipenko <digetx@...il.com>
Cc: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-tegra@...r.kernel.org,
	linux-clk@...r.kernel.org
Subject: [PATCH v1 5/9] clk: tegra114: remove emc to mc clock mux

Configure EMC without mux for EMC driver.

Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
---
 drivers/clk/tegra/clk-tegra114.c | 48 ++++++++++++++++++++++----------
 1 file changed, 33 insertions(+), 15 deletions(-)

diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c
index 73303458e886..b19dd4e6e17c 100644
--- a/drivers/clk/tegra/clk-tegra114.c
+++ b/drivers/clk/tegra/clk-tegra114.c
@@ -619,10 +619,6 @@ static const char *mux_plld_out0_plld2_out0[] = {
 };
 #define mux_plld_out0_plld2_out0_idx NULL
 
-static const char *mux_pllmcp_clkm[] = {
-	"pll_m_out0", "pll_c_out0", "pll_p_out0", "clk_m", "pll_m_ud",
-};
-
 static const struct clk_div_table pll_re_div_table[] = {
 	{ .val = 0, .div = 1 },
 	{ .val = 1, .div = 2 },
@@ -669,7 +665,6 @@ static struct tegra_clk tegra114_clks[tegra_clk_max] __initdata = {
 	[tegra_clk_csi] = { .dt_id = TEGRA114_CLK_CSI, .present = true },
 	[tegra_clk_i2c2] = { .dt_id = TEGRA114_CLK_I2C2, .present = true },
 	[tegra_clk_uartc] = { .dt_id = TEGRA114_CLK_UARTC, .present = true },
-	[tegra_clk_emc] = { .dt_id = TEGRA114_CLK_EMC, .present = true },
 	[tegra_clk_usb2] = { .dt_id = TEGRA114_CLK_USB2, .present = true },
 	[tegra_clk_usb3] = { .dt_id = TEGRA114_CLK_USB3, .present = true },
 	[tegra_clk_vde_8] = { .dt_id = TEGRA114_CLK_VDE, .present = true },
@@ -1045,14 +1040,7 @@ static __init void tegra114_periph_clk_init(void __iomem *clk_base,
 					     0, 82, periph_clk_enb_refcnt);
 	clks[TEGRA114_CLK_DSIB] = clk;
 
-	/* emc mux */
-	clk = clk_register_mux(NULL, "emc_mux", mux_pllmcp_clkm,
-			       ARRAY_SIZE(mux_pllmcp_clkm),
-			       CLK_SET_RATE_NO_REPARENT,
-			       clk_base + CLK_SOURCE_EMC,
-			       29, 3, 0, &emc_lock);
-
-	clk = tegra_clk_register_mc("mc", "emc_mux", clk_base + CLK_SOURCE_EMC,
+	clk = tegra_clk_register_mc("mc", "emc", clk_base + CLK_SOURCE_EMC,
 				    &emc_lock);
 	clks[TEGRA114_CLK_MC] = clk;
 
@@ -1300,6 +1288,28 @@ void tegra114_clock_deassert_dfll_dvco_reset(void)
 }
 EXPORT_SYMBOL(tegra114_clock_deassert_dfll_dvco_reset);
 
+#ifdef CONFIG_TEGRA124_CLK_EMC
+static struct clk *tegra114_clk_src_onecell_get(struct of_phandle_args *clkspec,
+						void *data)
+{
+	struct clk_hw *hw;
+	struct clk *clk;
+
+	clk = of_clk_src_onecell_get(clkspec, data);
+	if (IS_ERR(clk))
+		return clk;
+
+	hw = __clk_get_hw(clk);
+
+	if (clkspec->args[0] == TEGRA114_CLK_EMC) {
+		if (!tegra124_clk_emc_driver_available(hw))
+			return ERR_PTR(-EPROBE_DEFER);
+	}
+
+	return clk;
+}
+#endif
+
 static void __init tegra114_clock_init(struct device_node *np)
 {
 	struct device_node *node;
@@ -1341,13 +1351,21 @@ static void __init tegra114_clock_init(struct device_node *np)
 	tegra_audio_clk_init(clk_base, pmc_base, tegra114_clks,
 			     tegra114_audio_plls,
 			     ARRAY_SIZE(tegra114_audio_plls), 24000000);
+
+	tegra_clk_apply_init_table = tegra114_clock_apply_init_table;
+
 	tegra_super_clk_gen4_init(clk_base, pmc_base, tegra114_clks,
 					&pll_x_params);
 
+#ifdef CONFIG_TEGRA124_CLK_EMC
+	tegra_add_of_provider(np, tegra114_clk_src_onecell_get);
+	clks[TEGRA114_CLK_EMC] = tegra124_clk_register_emc(clk_base, np,
+							   &emc_lock);
+#else
 	tegra_add_of_provider(np, of_clk_src_onecell_get);
-	tegra_register_devclks(devclks, ARRAY_SIZE(devclks));
+#endif
 
-	tegra_clk_apply_init_table = tegra114_clock_apply_init_table;
+	tegra_register_devclks(devclks, ARRAY_SIZE(devclks));
 
 	tegra_cpu_car_ops = &tegra114_cpu_car_ops;
 }
-- 
2.43.0