[PATCH v2 8/9] clk: msm: Add support for MSM8960's multimedia clock controller (MMCC)

Stephen Boyd
2013-10-02T19:09:55Z

Add a driver for the multimedia clock controller found on MSM
8960 based platforms. This should allow multimedia device drivers
to probe and control their clocks.

TODO: Fill out reset of data and define all clocks

Cc: <devicetree@vger.kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
.../devicetree/bindings/clock/qcom,mmcc.txt | 19 ++
drivers/clk/msm/Kconfig | 9 +
drivers/clk/msm/Makefile | 1 +
drivers/clk/msm/mmcc-8960.c | 297 +++++++++++++++++++++
include/dt-bindings/clk/msm-mmcc-8960.h | 24 ++
5 files changed, 350 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/qcom,mmcc.txt
create mode 100644 drivers/clk/msm/mmcc-8960.c
create mode 100644 include/dt-bindings/clk/msm-mmcc-8960.h

diff --git a/Documentation/devicetree/bindings/clock/qcom,mmcc.txt b/Documentation/devicetree/bindings/clock/qcom,mmcc.txt
new file mode 100644
index 0000000..c29d472
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/qcom,mmcc.txt
@@ -0,0 +1,19 @@
+MSM Multimedia Clock Controller Binding
+-----------------------------------------
+
+Required properties :
+- compatible : shall contain at least "qcom,mmcc" and only one of the
+ following:
+
+ "qcom,mmcc-8660"
+ "qcom,mmcc-8960"
+
+- reg : shall contain base register location and length
+- #clock-cells : shall contain 1
+
+Example:
+ clock-controller@4000000 {
+ compatible = "qcom,mmcc-8960", "qcom,mmcc";
+ reg = <0x4000000 0x1000>;
+ #clock-cells = <1>;
+ };
diff --git a/drivers/clk/msm/Kconfig b/drivers/clk/msm/Kconfig
index 241fafc..66f5ccf 100644
--- a/drivers/clk/msm/Kconfig
+++ b/drivers/clk/msm/Kconfig
@@ -10,3 +10,12 @@ config MSM_GCC_8960
Support for the global clock controller on msm8960 devices.
Say Y if you want to use peripheral devices such as UART, SPI,
i2c, USB, SD/eMMC, SATA, PCIe, etc.
+
+config MSM_MMCC_8960
+ tristate "MSM8960 Multimedia Clock Controller"
+ select MSM_GCC_8960
+ depends on COMMON_CLK_MSM
+ help
+ Support for the multimedia clock controller on msm8960 devices.
+ Say Y if you want to support multimedia devices such as display,
+ graphics, video encode/decode, camera, etc.
diff --git a/drivers/clk/msm/Makefile b/drivers/clk/msm/Makefile
index 804fbe1..f6ceb52 100644
--- a/drivers/clk/msm/Makefile
+++ b/drivers/clk/msm/Makefile
@@ -6,3 +6,4 @@ clk-msm-$(CONFIG_COMMON_CLK_MSM) += clk-rcg2.o
clk-msm-$(CONFIG_COMMON_CLK_MSM) += clk-branch.o

obj-$(CONFIG_MSM_GCC_8960) += gcc-8960.o
+obj-$(CONFIG_MSM_MMCC_8960) += mmcc-8960.o
diff --git a/drivers/clk/msm/mmcc-8960.c b/drivers/clk/msm/mmcc-8960.c
new file mode 100644
index 0000000..ea660ab
--- /dev/null
+++ b/drivers/clk/msm/mmcc-8960.c
@@ -0,0 +1,297 @@
+/*
+ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ */
+
+#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 <dt-bindings/clk/msm-mmcc-8960.h>
+
+#include "clk-pll.h"
+#include "clk-rcg.h"
+#include "clk-branch.h"
+
+static struct clk_pll pll2 = {
+ .l_reg = 0x320,
+ .m_reg = 0x324,
+ .n_reg = 0x328,
+ .config_reg = 0x32c,
+ .mode_reg = 0x31c,
+ .status_reg = 0x334,
+ .status_bit = 16,
+ .hw.init = &(struct clk_init_data){
+ .name = "pll2",
+ .parent_names = (const char *[]){ "pxo" },
+ .num_parents = 1,
+ .ops = &clk_pll_ops,
+ },
+};
+
+#define P_PXO 0
+#define P_PLL2 1
+#define P_PLL8 2
+
+static u8 mmcc_pxo_pll2_pll8_map[] = {
+ [P_PXO] = 0,
+ [P_PLL2] = 1,
+ [P_PLL8] = 2,
+};
+
+static struct freq_tbl clk_tbl_mdp[] = {
+ { 9600000, P_PLL8, 0, 1, 40 },
+ { 13710000, P_PLL8, 0, 1, 28 },
+ { 27000000, P_PXO, 0, 0, 0 },
+ { 29540000, P_PLL8, 0, 1, 13 },
+ { 34910000, P_PLL8, 0, 1, 11 },
+ { 38400000, P_PLL8, 0, 1, 10 },
+ { 59080000, P_PLL8, 0, 2, 13 },
+ { 76800000, P_PLL8, 0, 1, 5 },
+ { 85330000, P_PLL8, 0, 2, 9 },
+ { 96000000, P_PLL8, 0, 1, 4 },
+ { 128000000, P_PLL8, 0, 1, 3 },
+ { 160000000, P_PLL2, 0, 1, 5 },
+ { 177780000, P_PLL2, 0, 2, 9 },
+ { 200000000, P_PLL2, 0, 1, 4 },
+ { 228571000, P_PLL2, 0, 2, 7 },
+ { 266667000, P_PLL2, 0, 1, 3 },
+ { }
+};
+
+static struct clk_dyn_rcg mdp_rcg = {
+ .ns_reg = 0xd0,
+ .md_reg[0] = 0xc4,
+ .md_reg[1] = 0xc8,
+ .mn[0] = {
+ .mnctr_en_bit = 8,
+ .mnctr_reset_bit = 31,
+ .mnctr_mode_shift = 9,
+ .n_val_shift = 22,
+ .m_val_shift = 8,
+ .width = 8,
+ },
+ .mn[1] = {
+ .mnctr_en_bit = 5,
+ .mnctr_reset_bit = 30,
+ .mnctr_mode_shift = 6,
+ .n_val_shift = 14,
+ .m_val_shift = 8,
+ .width = 8,
+ },
+ .s[0] = {
+ .src_sel_shift = 3,
+ .parent_map = mmcc_pxo_pll2_pll8_map,
+ },
+ .s[1] = {
+ .src_sel_shift = 0,
+ .parent_map = mmcc_pxo_pll2_pll8_map,
+ },
+ .mux_sel_bit = 11,
+ .freq_tbl = clk_tbl_mdp,
+ .hw = {
+ .enable_reg = 0xc0,
+ .enable_mask = BIT(2),
+ .init = &(struct clk_init_data){
+ .name = "mdp_rcg",
+ .parent_names = (const char *[]){
+ "pxo", "pll2", "pll8_vote"
+ },
+ .num_parents = 3,
+ .ops = &clk_dyn_rcg_ops,
+ },
+ },
+};
+
+static struct clk_branch mdp_cxc = {
+ .halt_reg = 0x1d0,
+ .halt_bit = 10,
+ .hw = {
+ .enable_reg = 0xc0,
+ .enable_mask = BIT(0),
+ .init = &(struct clk_init_data){
+ .name = "mdp_cxc",
+ .parent_names = (const char *[]){
+ "mdp_rcg",
+ },
+ .num_parents = 1,
+ .ops = &clk_branch_ops,
+ },
+ },
+};
+
+static struct freq_tbl clk_tbl_rot[] = {
+ { 27000000, P_PXO, 1 },
+ { 29540000, P_PLL8, 13 },
+ { 32000000, P_PLL8, 12 },
+ { 38400000, P_PLL8, 10 },
+ { 48000000, P_PLL8, 8 },
+ { 54860000, P_PLL8, 7 },
+ { 64000000, P_PLL8, 6 },
+ { 76800000, P_PLL8, 5 },
+ { 96000000, P_PLL8, 4 },
+ { 100000000, P_PLL2, 8 },
+ { 114290000, P_PLL2, 7 },
+ { 133330000, P_PLL2, 6 },
+ { 160000000, P_PLL2, 5 },
+ { 200000000, P_PLL2, 4 },
+ { }
+};
+
+static struct clk_dyn_rcg rot_rcg = {
+ .ns_reg = 0xe8,
+ .p[0] = {
+ .pre_div_shift = 22,
+ .pre_div_width = 4,
+ },
+ .p[1] = {
+ .pre_div_shift = 26,
+ .pre_div_width = 4,
+ },
+ .s[0] = {
+ .src_sel_shift = 16,
+ .parent_map = mmcc_pxo_pll2_pll8_map,
+ },
+ .s[1] = {
+ .src_sel_shift = 19,
+ .parent_map = mmcc_pxo_pll2_pll8_map,
+ },
+ .mux_sel_bit = 30,
+ .freq_tbl = clk_tbl_rot,
+ .hw = {
+ .enable_reg = 0xe0,
+ .enable_mask = BIT(2),
+ .init = &(struct clk_init_data){
+ .name = "rot_rcg",
+ .parent_names = (const char *[]){
+ "pxo", "pll2", "pll8_vote"
+ },
+ .num_parents = 3,
+ .ops = &clk_dyn_rcg_ops,
+ },
+ },
+};
+
+static struct clk_branch rot_cxc = {
+ .halt_reg = 0x1d0,
+ .halt_bit = 15,
+ .hw = {
+ .enable_reg = 0xe0,
+ .enable_mask = BIT(0),
+ .init = &(struct clk_init_data){
+ .name = "rot_cxc",
+ .parent_names = (const char *[]){
+ "rot_rcg",
+ },
+ .num_parents = 1,
+ .ops = &clk_branch_ops,
+ },
+ },
+};
+
+struct clk_map {
+ unsigned long id;
+ struct clk_hw *hw;
+};
+
+#define MAP(i, h) [i] = { .id = i, .hw = h }
+
+static const struct clk_map map[] = {
+ MAP(PLL2, &pll2.hw),
+ MAP(MDP_RCG, &mdp_rcg.hw),
+ MAP(MDP_CXC, &mdp_cxc.hw),
+ MAP(ROT_RCG, &rot_rcg.hw),
+ MAP(ROT_CXC, &rot_cxc.hw),
+};
+
+static const struct regmap_config msm_mmcc_8960_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = 0x334,
+ .fast_io = true,
+};
+
+static const struct of_device_id msm_mmcc_8960_match_table[] = {
+ { .compatible = "qcom,mmcc-8960" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, msm_mmcc_8960_match_table);
+
+static int msm_mmcc_8960_probe(struct platform_device *pdev)
+{
+ void __iomem *base;
+ struct resource *res;
+ int i;
+ struct device *dev = &pdev->dev;
+ struct clk *clk;
+ struct clk_onecell_data *data;
+ struct clk **clks;
+ struct regmap *regmap;
+ size_t num_clks;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ regmap = devm_regmap_init_mmio(dev, base, &msm_mmcc_8960_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ num_clks = ARRAY_SIZE(map);
+ data = devm_kzalloc(dev, sizeof(*data) + sizeof(*clks) * num_clks,
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ clks = (struct clk **)(data + 1);
+ data->clks = clks;
+ data->clk_num = num_clks;
+
+ for (i = 0; i < num_clks; i++) {
+ if (!map[i].hw)
+ continue;
+ clk = devm_clk_register(dev, map[i].hw);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ clks[map[i].id] = clk;
+ }
+
+ return of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, data);
+}
+
+static int msm_mmcc_8960_remove(struct platform_device *pdev)
+{
+ of_clk_del_provider(pdev->dev.of_node);
+ return 0;
+}
+
+static struct platform_driver msm_mmcc_8960_driver = {
+ .probe = msm_mmcc_8960_probe,
+ .remove = msm_mmcc_8960_remove,
+ .driver = {
+ .name = "msm-mmcc-8960",
+ .owner = THIS_MODULE,
+ .of_match_table = msm_mmcc_8960_match_table,
+ },
+};
+
+module_platform_driver(msm_mmcc_8960_driver);
+
+MODULE_DESCRIPTION("MSM MMCC 8960 Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:msm-mmcc-8960");
diff --git a/include/dt-bindings/clk/msm-mmcc-8960.h b/include/dt-bindings/clk/msm-mmcc-8960.h
new file mode 100644
index 0000000..86eca3f
--- /dev/null
+++ b/include/dt-bindings/clk/msm-mmcc-8960.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ */
+
+#ifndef _DT_BINDINGS_CLK_MSM_MMCC_8960_H
+#define _DT_BINDINGS_CLK_MSM_MMCC_8960_H
+
+
+#define PLL2 0
+#define MDP_RCG 1
+#define MDP_CXC 2
+#define ROT_RCG 3
+#define ROT_CXC 4