From 93044a4dc27b656d5acf2d134fff0446b8e04f85 Mon Sep 17 00:00:00 2001 From: Arto Merilainen Date: Thu, 13 Mar 2014 11:51:18 +0200 Subject: gpu: nvgpu: Generic platform This patch adds minimal t124 generic platform configuration to platform_gk20a_generic.c to allow testing the minimal configuration. Bug 1434573 Change-Id: I1a3f00e14661023c8ff77d7576ba70cf98a95db5 Signed-off-by: Arto Merilainen Reviewed-on: http://git-master/r/381427 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Terje Bergstrom --- drivers/gpu/nvgpu/gk20a/platform_gk20a_generic.c | 83 +++++++++++++++++++++++- 1 file changed, 81 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/nvgpu') diff --git a/drivers/gpu/nvgpu/gk20a/platform_gk20a_generic.c b/drivers/gpu/nvgpu/gk20a/platform_gk20a_generic.c index 7b750df6..5000db7f 100644 --- a/drivers/gpu/nvgpu/gk20a/platform_gk20a_generic.c +++ b/drivers/gpu/nvgpu/gk20a/platform_gk20a_generic.c @@ -18,18 +18,97 @@ * along with this program. If not, see . */ +#include +#include +#include + #include "platform_gk20a.h" +#include "hal_gk20a.h" +#include "gk20a.h" + +/* + * gk20a_generic_railgate() + * + * Gate (disable) gk20a power rail + */ + +static int gk20a_generic_railgate(struct platform_device *pdev) +{ + if (tegra_powergate_is_powered(TEGRA_POWERGATE_GPU)) + tegra_powergate_partition(TEGRA_POWERGATE_GPU); + return 0; +} + +/* + * gk20a_generic_unrailgate() + * + * Ungate (enable) gk20a power rail + */ + +static int gk20a_generic_unrailgate(struct platform_device *pdev) +{ + tegra_unpowergate_partition(TEGRA_POWERGATE_GPU); + return 0; +} + +/* + * 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 platform_device *pdev) +{ + struct gk20a_platform *platform = platform_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]); + return -ENODEV; +} static int gk20a_generic_probe(struct platform_device *dev) +{ + gk20a_generic_get_clocks(dev); + + return 0; +} + +static int gk20a_generic_late_probe(struct platform_device *dev) { struct gk20a_platform *platform = gk20a_get_platform(dev); - /* TODO: Initialize clocks and power */ - (void)platform; + /* Make gk20a power domain a subdomain of mc */ + tegra_pd_add_sd(&platform->g->pd); return 0; } struct gk20a_platform gk20a_generic_platform = { + .railgate = gk20a_generic_railgate, + .unrailgate = gk20a_generic_unrailgate, + .probe = gk20a_generic_probe, + .late_probe = gk20a_generic_late_probe, }; -- cgit v1.2.2