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Subject[PATCH v3 1/2] clk: qcom: Add MSM8998 GPU Clock Controller (GPUCC) driver
Date
The GPUCC manages the clocks for the Adreno GPU found on MSM8998.

Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
---
drivers/clk/qcom/Kconfig | 8 +
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/gpucc-msm8998.c | 359 +++++++++++++++++++++++++++++++
3 files changed, 368 insertions(+)
create mode 100644 drivers/clk/qcom/gpucc-msm8998.c

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index e1ff83cc361e..e992682fb9eb 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -222,6 +222,14 @@ config MSM_GCC_8998
Say Y if you want to use peripheral devices such as UART, SPI,
i2c, USB, UFS, SD/eMMC, PCIe, etc.

+config MSM_GPUCC_8998
+ tristate "MSM8998 Graphics Clock Controller"
+ select MSM_GCC_8998
+ help
+ Support for the graphics clock controller on MSM8998 devices.
+ Say Y if you want to support graphics controller devices and
+ functionality such as 3D graphics.
+
config QCS_GCC_404
tristate "QCS404 Global Clock Controller"
help
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index f0768fb1f037..b8b6ffbdbd62 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_MSM_GCC_8994) += gcc-msm8994.o
obj-$(CONFIG_MSM_GCC_8996) += gcc-msm8996.o
obj-$(CONFIG_MSM_LCC_8960) += lcc-msm8960.o
obj-$(CONFIG_MSM_GCC_8998) += gcc-msm8998.o
+obj-$(CONFIG_MSM_GPUCC_8998) += gpucc-msm8998.o
obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o
obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
obj-$(CONFIG_MSM_MMCC_8996) += mmcc-msm8996.o
diff --git a/drivers/clk/qcom/gpucc-msm8998.c b/drivers/clk/qcom/gpucc-msm8998.c
new file mode 100644
index 000000000000..900de97f519d
--- /dev/null
+++ b/drivers/clk/qcom/gpucc-msm8998.c
@@ -0,0 +1,359 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019, Jeffrey Hugo
+ */
+
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+#include <linux/reset-controller.h>
+#include <linux/clk.h>
+
+#include <dt-bindings/clock/qcom,gpucc-msm8998.h>
+
+#include "common.h"
+#include "clk-regmap.h"
+#include "clk-regmap-divider.h"
+#include "clk-alpha-pll.h"
+#include "clk-rcg.h"
+#include "clk-branch.h"
+#include "reset.h"
+#include "gdsc.h"
+
+enum {
+ P_XO,
+ P_GPLL0,
+ P_GPUPLL0_OUT_EVEN,
+};
+
+/* Instead of going directly to the block, XO is routed through this branch */
+static struct clk_branch gpucc_cxo_clk = {
+ .halt_reg = 0x1020,
+ .clkr = {
+ .enable_reg = 0x1020,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "gpucc_cxo_clk",
+ .parent_data = &(const struct clk_parent_data){
+ .fw_name = "xo",
+ .name = "xo"
+ },
+ .num_parents = 1,
+ .ops = &clk_branch2_ops,
+ .flags = CLK_IS_CRITICAL,
+ },
+ },
+};
+
+static const struct clk_div_table post_div_table_fabia_even[] = {
+ { 0x0, 1 },
+ { 0x1, 2 },
+ { 0x3, 4 },
+ { 0x7, 8 },
+ { }
+};
+
+static struct clk_alpha_pll gpupll0 = {
+ .offset = 0x0,
+ .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA],
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "gpupll0",
+ .parent_hws = (const struct clk_hw *[]){ &gpucc_cxo_clk.clkr.hw },
+ .num_parents = 1,
+ .ops = &clk_alpha_pll_fixed_fabia_ops,
+ },
+};
+
+static struct clk_alpha_pll_postdiv gpupll0_out_even = {
+ .offset = 0x0,
+ .post_div_shift = 8,
+ .post_div_table = post_div_table_fabia_even,
+ .num_post_div = ARRAY_SIZE(post_div_table_fabia_even),
+ .width = 4,
+ .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA],
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "gpupll0_out_even",
+ .parent_hws = (const struct clk_hw *[]){ &gpupll0.clkr.hw },
+ .num_parents = 1,
+ .ops = &clk_alpha_pll_postdiv_fabia_ops,
+ },
+};
+
+static const struct parent_map gpu_xo_gpll0_map[] = {
+ { P_XO, 0 },
+ { P_GPLL0, 5 },
+};
+
+static const struct clk_parent_data gpu_xo_gpll0[] = {
+ { .hw = &gpucc_cxo_clk.clkr.hw },
+ { .fw_name = "gpll0", .name = "gpll0" },
+};
+
+static const struct parent_map gpu_xo_gpupll0_map[] = {
+ { P_XO, 0 },
+ { P_GPUPLL0_OUT_EVEN, 1 },
+};
+
+static const struct clk_parent_data gpu_xo_gpupll0[] = {
+ { .hw = &gpucc_cxo_clk.clkr.hw },
+ { .hw = &gpupll0_out_even.clkr.hw },
+};
+
+static const struct freq_tbl ftbl_rbcpr_clk_src[] = {
+ F(19200000, P_XO, 1, 0, 0),
+ F(50000000, P_GPLL0, 12, 0, 0),
+ { }
+};
+
+static struct clk_rcg2 rbcpr_clk_src = {
+ .cmd_rcgr = 0x1030,
+ .hid_width = 5,
+ .parent_map = gpu_xo_gpll0_map,
+ .freq_tbl = ftbl_rbcpr_clk_src,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "rbcpr_clk_src",
+ .parent_data = gpu_xo_gpll0,
+ .num_parents = 2,
+ .ops = &clk_rcg2_ops,
+ },
+};
+
+static const struct freq_tbl ftbl_gfx3d_clk_src[] = {
+ F(180000000, P_GPUPLL0_OUT_EVEN, 2, 0, 0),
+ F(257000000, P_GPUPLL0_OUT_EVEN, 2, 0, 0),
+ F(342000000, P_GPUPLL0_OUT_EVEN, 2, 0, 0),
+ F(414000000, P_GPUPLL0_OUT_EVEN, 2, 0, 0),
+ F(515000000, P_GPUPLL0_OUT_EVEN, 2, 0, 0),
+ F(596000000, P_GPUPLL0_OUT_EVEN, 2, 0, 0),
+ F(670000000, P_GPUPLL0_OUT_EVEN, 2, 0, 0),
+ F(710000000, P_GPUPLL0_OUT_EVEN, 2, 0, 0),
+ { }
+};
+
+static struct clk_rcg2 gfx3d_clk_src = {
+ .cmd_rcgr = 0x1070,
+ .hid_width = 5,
+ .parent_map = gpu_xo_gpupll0_map,
+ .freq_tbl = ftbl_gfx3d_clk_src,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "gfx3d_clk_src",
+ .parent_data = gpu_xo_gpupll0,
+ .num_parents = 2,
+ .ops = &clk_rcg2_ops,
+ .flags = CLK_OPS_PARENT_ENABLE,
+ },
+};
+
+static const struct freq_tbl ftbl_rbbmtimer_clk_src[] = {
+ F(19200000, P_XO, 1, 0, 0),
+ { }
+};
+
+static struct clk_rcg2 rbbmtimer_clk_src = {
+ .cmd_rcgr = 0x10b0,
+ .hid_width = 5,
+ .parent_map = gpu_xo_gpll0_map,
+ .freq_tbl = ftbl_rbbmtimer_clk_src,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "rbbmtimer_clk_src",
+ .parent_data = gpu_xo_gpll0,
+ .num_parents = 2,
+ .ops = &clk_rcg2_ops,
+ },
+};
+
+static const struct freq_tbl ftbl_gfx3d_isense_clk_src[] = {
+ F(19200000, P_XO, 1, 0, 0),
+ F(40000000, P_GPLL0, 15, 0, 0),
+ F(200000000, P_GPLL0, 3, 0, 0),
+ F(300000000, P_GPLL0, 2, 0, 0),
+ { }
+};
+
+static struct clk_rcg2 gfx3d_isense_clk_src = {
+ .cmd_rcgr = 0x1100,
+ .hid_width = 5,
+ .parent_map = gpu_xo_gpll0_map,
+ .freq_tbl = ftbl_gfx3d_isense_clk_src,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "gfx3d_isense_clk_src",
+ .parent_data = gpu_xo_gpll0,
+ .num_parents = 2,
+ .ops = &clk_rcg2_ops,
+ },
+};
+
+static struct clk_branch rbcpr_clk = {
+ .halt_reg = 0x1054,
+ .clkr = {
+ .enable_reg = 0x1054,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "rbcpr_clk",
+ .parent_hws = (const struct clk_hw *[]){ &rbcpr_clk_src.clkr.hw },
+ .num_parents = 1,
+ .ops = &clk_branch2_ops,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+ },
+};
+
+static struct clk_branch gfx3d_clk = {
+ .halt_reg = 0x1098,
+ .clkr = {
+ .enable_reg = 0x1098,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "gfx3d_clk",
+ .parent_hws = (const struct clk_hw *[]){ &gfx3d_clk_src.clkr.hw },
+ .num_parents = 1,
+ .ops = &clk_branch2_ops,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+ },
+};
+
+static struct clk_branch rbbmtimer_clk = {
+ .halt_reg = 0x10d0,
+ .clkr = {
+ .enable_reg = 0x10d0,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "rbbmtimer_clk",
+ .parent_hws = (const struct clk_hw *[]){ &rbbmtimer_clk_src.clkr.hw },
+ .num_parents = 1,
+ .ops = &clk_branch2_ops,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+ },
+};
+
+static struct clk_branch gfx3d_isense_clk = {
+ .halt_reg = 0x1124,
+ .clkr = {
+ .enable_reg = 0x1124,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "gfx3d_isense_clk",
+ .parent_hws = (const struct clk_hw *[]){ &gfx3d_isense_clk_src.clkr.hw },
+ .num_parents = 1,
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct gdsc gpu_cx_gdsc = {
+ .gdscr = 0x1004,
+ .pd = {
+ .name = "gpu_cx",
+ },
+ .pwrsts = PWRSTS_OFF_ON,
+};
+
+static struct gdsc gpu_gx_gdsc = {
+ .gdscr = 0x1094,
+ .clamp_io_ctrl = 0x130,
+ .pd = {
+ .name = "gpu_gx",
+ },
+ .parent = &gpu_cx_gdsc.pd,
+ .pwrsts = PWRSTS_OFF_ON,
+ .flags = CLAMP_IO | AON_RESET,
+};
+
+static struct clk_regmap *gpucc_msm8998_clocks[] = {
+ [GPUPLL0] = &gpupll0.clkr,
+ [GPUPLL0_OUT_EVEN] = &gpupll0_out_even.clkr,
+ [RBCPR_CLK_SRC] = &rbcpr_clk_src.clkr,
+ [GFX3D_CLK_SRC] = &gfx3d_clk_src.clkr,
+ [RBBMTIMER_CLK_SRC] = &rbbmtimer_clk_src.clkr,
+ [GFX3D_ISENSE_CLK_SRC] = &gfx3d_isense_clk_src.clkr,
+ [RBCPR_CLK] = &rbcpr_clk.clkr,
+ [GFX3D_CLK] = &gfx3d_clk.clkr,
+ [RBBMTIMER_CLK] = &rbbmtimer_clk.clkr,
+ [GFX3D_ISENSE_CLK] = &gfx3d_isense_clk.clkr,
+ [GPUCC_CXO_CLK] = &gpucc_cxo_clk.clkr,
+};
+
+static struct gdsc *gpucc_msm8998_gdscs[] = {
+ [GPU_CX_GDSC] = &gpu_cx_gdsc,
+ [GPU_GX_GDSC] = &gpu_gx_gdsc,
+};
+
+static const struct qcom_reset_map gpucc_msm8998_resets[] = {
+ [GPU_CX_BCR] = { 0x1000 },
+ [RBCPR_BCR] = { 0x1050 },
+ [GPU_GX_BCR] = { 0x1090 },
+ [GPU_ISENSE_BCR] = { 0x1120 },
+};
+
+static const struct regmap_config gpucc_msm8998_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = 0x9000,
+ .fast_io = true,
+};
+
+static const struct qcom_cc_desc gpucc_msm8998_desc = {
+ .config = &gpucc_msm8998_regmap_config,
+ .clks = gpucc_msm8998_clocks,
+ .num_clks = ARRAY_SIZE(gpucc_msm8998_clocks),
+ .resets = gpucc_msm8998_resets,
+ .num_resets = ARRAY_SIZE(gpucc_msm8998_resets),
+ .gdscs = gpucc_msm8998_gdscs,
+ .num_gdscs = ARRAY_SIZE(gpucc_msm8998_gdscs),
+};
+
+static const struct of_device_id gpucc_msm8998_match_table[] = {
+ { .compatible = "qcom,gpucc-msm8998" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, gpucc_msm8998_match_table);
+
+static int gpucc_msm8998_probe(struct platform_device *pdev)
+{
+ struct regmap *regmap;
+ struct clk *xo;
+
+ /*
+ * We must have a valid XO to continue until orphan probe defer is
+ * implemented. XO is basically the root of everything. Since we
+ * cannot control probe order, its possible XO won't be available
+ * and the clk framework will allow clients to operate on their
+ * clocks that depend on XO, which has been observed to cause issues.
+ */
+ xo = clk_get(&pdev->dev, "xo");
+ if (IS_ERR(xo))
+ return PTR_ERR(xo);
+ clk_put(xo);
+
+ regmap = qcom_cc_map(pdev, &gpucc_msm8998_desc);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ /* force periph logic on to avoid perf counter corruption */
+ regmap_write_bits(regmap, gfx3d_clk.clkr.enable_reg, BIT(13), BIT(13));
+ /* tweak droop detector (GPUCC_GPU_DD_WRAP_CTRL) to reduce leakage */
+ regmap_write_bits(regmap, gfx3d_clk.clkr.enable_reg, BIT(0), BIT(0));
+
+ return qcom_cc_really_probe(pdev, &gpucc_msm8998_desc, regmap);
+}
+
+static struct platform_driver gpucc_msm8998_driver = {
+ .probe = gpucc_msm8998_probe,
+ .driver = {
+ .name = "gpucc-msm8998",
+ .of_match_table = gpucc_msm8998_match_table,
+ },
+};
+module_platform_driver(gpucc_msm8998_driver);
+
+MODULE_DESCRIPTION("QCOM GPUCC MSM8998 Driver");
+MODULE_LICENSE("GPL v2");
--
2.17.1
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