Open source GPL/LGPL release

drivers/gpu/nvgpu/gk20a/platform_gk20a_generic.c

@@ -0,0 +1,90 @@
+/*
+ * drivers/gpu/nvgpu/gk20a/platform_gk20a_generic.c
+ *
+ * GK20A Generic Platform Interface
+ *
+ * Copyright (c) 2014-2015, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+
+#include "platform_gk20a.h"
+#include "hal_gk20a.h"
+#include "gk20a.h"
+
+/*
+ * gk20a_generic_get_clocks()
+ *
+ * This function finds clocks in tegra platform and populates
+ * the clock information to gk20a platform data.
+ */
+
+static int gk20a_generic_get_clocks(struct device *pdev)
+{
+	struct gk20a_platform *platform = dev_get_drvdata(pdev);
+
+	platform->clk[0] = clk_get_sys("tegra_gk20a.0",	"PLLG_ref");
+	platform->clk[1] = clk_get_sys("tegra_gk20a.0", "pwr");
+	platform->clk[2] = clk_get_sys("tegra_gk20a.0", "emc");
+	platform->num_clks = 3;
+
+	if (IS_ERR(platform->clk[0]) ||
+	    IS_ERR(platform->clk[1]) ||
+	    IS_ERR(platform->clk[2]))
+		goto err_get_clock;
+
+	clk_set_rate(platform->clk[0], UINT_MAX);
+	clk_set_rate(platform->clk[1], 204000000);
+	clk_set_rate(platform->clk[2], UINT_MAX);
+
+	return 0;
+
+err_get_clock:
+	if (!IS_ERR_OR_NULL(platform->clk[0]))
+		clk_put(platform->clk[0]);
+	if (!IS_ERR_OR_NULL(platform->clk[1]))
+		clk_put(platform->clk[1]);
+	if (!IS_ERR_OR_NULL(platform->clk[2]))
+		clk_put(platform->clk[2]);
+
+	platform->clk[0] = NULL;
+	platform->clk[1] = NULL;
+	platform->clk[2] = NULL;
+	return -ENODEV;
+}
+
+static int gk20a_generic_probe(struct device *dev)
+{
+	gk20a_generic_get_clocks(dev);
+
+	return 0;
+}
+
+static int gk20a_generic_late_probe(struct device *dev)
+{
+	return 0;
+}
+
+static int gk20a_generic_remove(struct device *dev)
+{
+	return 0;
+}
+
+struct gk20a_platform gk20a_generic_platform = {
+	.probe = gk20a_generic_probe,
+	.late_probe = gk20a_generic_late_probe,
+	.remove = gk20a_generic_remove,
+	.default_big_page_size	= SZ_128K,
+};