linux-kernel - [PATCH 5/6] clk: tegra: Add support for Tegra132 CAR clocks

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Date:	Tue, 15 Jul 2014 18:24:35 +0300
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	Peter De Schrijver <pdeschrijver@...dia.com>
CC:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Mike Turquette <mturquette@...aro.org>,
	Joseph Lo <josephl@...dia.com>,
	Alexandre Courbot <acourbot@...dia.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Tuomas Tynkkynen <ttynkkynen@...dia.com>,
	<devicetree@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH 5/6] clk: tegra: Add support for Tegra132 CAR clocks

Tegra132 CAR supports almost the same clocks as Tegra124 CAR. This patch
deals with the small differences.

--
I'm not entirely sure why the soc_therm clock needs to be enabled on Tegra132,
but turning it off results in a system hang. I presume this might be because
of fastboot initializing soc_therm.

Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com>
---
 drivers/clk/tegra/clk-tegra124.c |   32 ++++++++++++++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/drivers/clk/tegra/clk-tegra124.c b/drivers/clk/tegra/clk-tegra124.c
index 80efe51..b857aab 100644
--- a/drivers/clk/tegra/clk-tegra124.c
+++ b/drivers/clk/tegra/clk-tegra124.c
@@ -1369,6 +1369,7 @@ static struct tegra_clk_init_table init_table[] __initdata = {
 	{TEGRA124_CLK_XUSB_HS_SRC, TEGRA124_CLK_PLL_U_60M, 60000000, 0},
 	{TEGRA124_CLK_XUSB_FALCON_SRC, TEGRA124_CLK_PLL_RE_OUT, 224000000, 0},
 	{TEGRA124_CLK_XUSB_HOST_SRC, TEGRA124_CLK_PLL_RE_OUT, 112000000, 0},
+	{TEGRA124_CLK_SOC_THERM, TEGRA124_CLK_PLL_P, 51000000, 0},
 	/* This MUST be the last entry. */
 	{TEGRA124_CLK_CLK_MAX, TEGRA124_CLK_CLK_MAX, 0, 0},
 };
@@ -1378,9 +1379,25 @@ static void __init tegra124_clock_apply_init_table(void)
 	tegra_init_from_table(init_table, clks, TEGRA124_CLK_CLK_MAX);
 }
 
+enum {
+	TEGRA124_CLK,
+	TEGRA132_CLK,
+};
+
+static const struct of_device_id tegra_clock_of_match[] = {
+	{ .compatible = "nvidia,tegra124-car", .data = (void *)TEGRA124_CLK },
+	{ .compatible = "nvidia,tegra132-car", .data = (void *)TEGRA132_CLK },
+	{},
+};
+
 static void __init tegra124_clock_init(struct device_node *np)
 {
 	struct device_node *node;
+	const struct of_device_id *match;
+	uintptr_t id;
+
+	match = of_match_node(tegra_clock_of_match, np);
+	id = (uintptr_t)match->data;
 
 	clk_base = of_iomap(np, 0);
 	if (!clk_base) {
@@ -1416,6 +1433,20 @@ static void __init tegra124_clock_init(struct device_node *np)
 	tegra_audio_clk_init(clk_base, pmc_base, tegra124_clks, &pll_a_params);
 	tegra_pmc_clk_init(pmc_base, tegra124_clks);
 
+	if (id == TEGRA132_CLK) {
+		int i;
+
+		tegra124_clks[tegra_clk_cclk_g].present = false;
+		tegra124_clks[tegra_clk_cclk_lp].present = false;
+		tegra124_clks[tegra_clk_pll_x].present = false;
+		tegra124_clks[tegra_clk_pll_x_out0].present = false;
+
+		/* Tegra132 requires the soc_therm clock to be always on */
+		for (i = 0; i < ARRAY_SIZE(init_table); i++) {
+			if (init_table[i].clk_id == TEGRA124_CLK_SOC_THERM)
+				init_table[i].state = 1;
+		}
+	}
 	tegra_super_clk_gen4_init(clk_base, pmc_base, tegra124_clks,
 					&pll_x_params);
 	tegra_add_of_provider(np);
@@ -1426,3 +1457,4 @@ static void __init tegra124_clock_init(struct device_node *np)
 	tegra_cpu_car_ops = &tegra124_cpu_car_ops;
 }
 CLK_OF_DECLARE(tegra124, "nvidia,tegra124-car", tegra124_clock_init);
+CLK_OF_DECLARE(tegra132, "nvidia,tegra132-car", tegra124_clock_init);
-- 
1.7.7.rc0.72.g4b5ea.dirty

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