[PATCH v7 2/7] clk: meson: aoclk: refactor common code into dedicated file

Yixun Lan
2018-04-26T08:44:55Z

We try to refactor the common code into one dedicated file,
while preparing to add new Meson-AXG aoclk driver, this would
help us to better share the code by all aoclk drivers.

Suggested-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
---
drivers/clk/meson/Kconfig | 7 +++
drivers/clk/meson/Makefile | 1 +
drivers/clk/meson/gxbb-aoclk.c | 94 +++++++++++----------------------
drivers/clk/meson/gxbb-aoclk.h | 5 ++
drivers/clk/meson/meson-aoclk.c | 81 ++++++++++++++++++++++++++++
drivers/clk/meson/meson-aoclk.h | 34 ++++++++++++
6 files changed, 160 insertions(+), 62 deletions(-)
create mode 100644 drivers/clk/meson/meson-aoclk.c
create mode 100644 drivers/clk/meson/meson-aoclk.h

diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
index d5cbec522aec..fddc7ec7b820 100644
--- a/drivers/clk/meson/Kconfig
+++ b/drivers/clk/meson/Kconfig
@@ -3,6 +3,12 @@ config COMMON_CLK_AMLOGIC
depends on OF
depends on ARCH_MESON || COMPILE_TEST

+config COMMON_CLK_MESON_AO
+ bool
+ depends on OF
+ depends on ARCH_MESON || COMPILE_TEST
+ select COMMON_CLK_REGMAP_MESON
+
config COMMON_CLK_REGMAP_MESON
bool
select REGMAP
@@ -21,6 +27,7 @@ config COMMON_CLK_GXBB
bool
depends on COMMON_CLK_AMLOGIC
select RESET_CONTROLLER
+ select COMMON_CLK_MESON_AO
select COMMON_CLK_REGMAP_MESON
select MFD_SYSCON
help
diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
index ffee82e60b7a..0a8df284f4e7 100644
--- a/drivers/clk/meson/Makefile
+++ b/drivers/clk/meson/Makefile
@@ -3,6 +3,7 @@
#

obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-pll.o clk-mpll.o clk-audio-divider.o
+obj-$(CONFIG_COMMON_CLK_MESON_AO) += meson-aoclk.o
obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b.o
obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o gxbb-aoclk-32k.o
obj-$(CONFIG_COMMON_CLK_AXG) += axg.o
diff --git a/drivers/clk/meson/gxbb-aoclk.c b/drivers/clk/meson/gxbb-aoclk.c
index eebb580b9e0f..20f73e0d82a4 100644
--- a/drivers/clk/meson/gxbb-aoclk.c
+++ b/drivers/clk/meson/gxbb-aoclk.c
@@ -52,39 +52,12 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-#include <linux/clk-provider.h>
-#include <linux/of_address.h>
#include <linux/platform_device.h>
-#include <linux/reset-controller.h>
#include <linux/mfd/syscon.h>
-#include <linux/regmap.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <dt-bindings/clock/gxbb-aoclkc.h>
-#include <dt-bindings/reset/gxbb-aoclkc.h>
#include "clk-regmap.h"
+#include "meson-aoclk.h"
#include "gxbb-aoclk.h"

-struct gxbb_aoclk_reset_controller {
- struct reset_controller_dev reset;
- unsigned int *data;
- struct regmap *regmap;
-};
-
-static int gxbb_aoclk_do_reset(struct reset_controller_dev *rcdev,
- unsigned long id)
-{
- struct gxbb_aoclk_reset_controller *reset =
- container_of(rcdev, struct gxbb_aoclk_reset_controller, reset);
-
- return regmap_write(reset->regmap, AO_RTI_GEN_CNTL_REG0,
- BIT(reset->data[id]));
-}
-
-static const struct reset_control_ops gxbb_aoclk_reset_ops = {
- .reset = gxbb_aoclk_do_reset,
-};
-
#define GXBB_AO_GATE(_name, _bit) \
static struct clk_regmap _name##_ao = { \
.data = &(struct clk_regmap_gate_data) { \
@@ -117,7 +90,7 @@ static struct aoclk_cec_32k cec_32k_ao = {
},
};

-static unsigned int gxbb_aoclk_reset[] = {
+static const unsigned int gxbb_aoclk_reset[] = {
[RESET_AO_REMOTE] = 16,
[RESET_AO_I2C_MASTER] = 18,
[RESET_AO_I2C_SLAVE] = 19,
@@ -135,7 +108,7 @@ static struct clk_regmap *gxbb_aoclk_gate[] = {
[CLKID_AO_IR_BLASTER] = &ir_blaster_ao,
};

-static struct clk_hw_onecell_data gxbb_aoclk_onecell_data = {
+static const struct clk_hw_onecell_data gxbb_aoclk_onecell_data = {
.hws = {
[CLKID_AO_REMOTE] = &remote_ao.hw,
[CLKID_AO_I2C_MASTER] = &i2c_master_ao.hw,
@@ -145,58 +118,55 @@ static struct clk_hw_onecell_data gxbb_aoclk_onecell_data = {
[CLKID_AO_IR_BLASTER] = &ir_blaster_ao.hw,
[CLKID_AO_CEC_32K] = &cec_32k_ao.hw,
},
- .num = 7,
+ .num = NR_CLKS,
};

-static int gxbb_aoclkc_probe(struct platform_device *pdev)
+static int gxbb_register_cec_ao_32k(struct platform_device *pdev)
{
- struct gxbb_aoclk_reset_controller *rstc;
struct device *dev = &pdev->dev;
struct regmap *regmap;
- int ret, clkid;
-
- rstc = devm_kzalloc(dev, sizeof(*rstc), GFP_KERNEL);
- if (!rstc)
- return -ENOMEM;
+ int ret;

regmap = syscon_node_to_regmap(of_get_parent(dev->of_node));
if (IS_ERR(regmap)) {
dev_err(dev, "failed to get regmap\n");
- return -ENODEV;
- }
-
- /* Reset Controller */
- rstc->regmap = regmap;
- rstc->data = gxbb_aoclk_reset;
- rstc->reset.ops = &gxbb_aoclk_reset_ops;
- rstc->reset.nr_resets = ARRAY_SIZE(gxbb_aoclk_reset);
- rstc->reset.of_node = dev->of_node;
- ret = devm_reset_controller_register(dev, &rstc->reset);
-
- /*
- * Populate regmap and register all clks
- */
- for (clkid = 0; clkid < ARRAY_SIZE(gxbb_aoclk_gate); clkid++) {
- gxbb_aoclk_gate[clkid]->map = regmap;
-
- ret = devm_clk_hw_register(dev,
- gxbb_aoclk_onecell_data.hws[clkid]);
- if (ret)
- return ret;
+ return PTR_ERR(regmap);
}

/* Specific clocks */
cec_32k_ao.regmap = regmap;
ret = devm_clk_hw_register(dev, &cec_32k_ao.hw);
+ if (ret) {
+ dev_err(&pdev->dev, "clk cec_32k_ao register failed.\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct meson_aoclk_data gxbb_aoclkc_data = {
+ .reset_reg = AO_RTI_GEN_CNTL_REG0,
+ .num_reset = ARRAY_SIZE(gxbb_aoclk_reset),
+ .reset = gxbb_aoclk_reset,
+ .num_clks = ARRAY_SIZE(gxbb_aoclk_gate),
+ .clks = gxbb_aoclk_gate,
+ .hw_data = &gxbb_aoclk_onecell_data,
+};
+
+static int gxbb_aoclkc_probe(struct platform_device *pdev)
+{
+ int ret = gxbb_register_cec_ao_32k(pdev);
if (ret)
return ret;

- return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
- &gxbb_aoclk_onecell_data);
+ return meson_aoclkc_probe(pdev);
}

static const struct of_device_id gxbb_aoclkc_match_table[] = {
- { .compatible = "amlogic,meson-gx-aoclkc" },
+ {
+ .compatible = "amlogic,meson-gx-aoclkc",
+ .data = &gxbb_aoclkc_data,
+ },
{ }
};

diff --git a/drivers/clk/meson/gxbb-aoclk.h b/drivers/clk/meson/gxbb-aoclk.h
index badc4c22b4ee..6e7fa4134a00 100644
--- a/drivers/clk/meson/gxbb-aoclk.h
+++ b/drivers/clk/meson/gxbb-aoclk.h
@@ -8,6 +8,8 @@
#ifndef __GXBB_AOCLKC_H
#define __GXBB_AOCLKC_H

+#define NR_CLKS 7
+
/* AO Configuration Clock registers offsets */
#define AO_RTI_PWR_CNTL_REG1 0x0c
#define AO_RTI_PWR_CNTL_REG0 0x10
@@ -26,4 +28,7 @@ struct aoclk_cec_32k {

extern const struct clk_ops meson_aoclk_cec_32k_ops;

+#include <dt-bindings/clock/gxbb-aoclkc.h>
+#include <dt-bindings/reset/gxbb-aoclkc.h>
+
#endif /* __GXBB_AOCLKC_H */
diff --git a/drivers/clk/meson/meson-aoclk.c b/drivers/clk/meson/meson-aoclk.c
new file mode 100644
index 000000000000..f965845917e3
--- /dev/null
+++ b/drivers/clk/meson/meson-aoclk.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Amlogic Meson-AXG Clock Controller Driver
+ *
+ * Copyright (c) 2016 BayLibre, SAS.
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * Copyright (c) 2018 Amlogic, inc.
+ * Author: Qiufang Dai <qiufang.dai@amlogic.com>
+ * Author: Yixun Lan <yixun.lan@amlogic.com>
+ */
+
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_device.h>
+#include "clk-regmap.h"
+#include "meson-aoclk.h"
+
+static int meson_aoclk_do_reset(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct meson_aoclk_reset_controller *rstc =
+ container_of(rcdev, struct meson_aoclk_reset_controller, reset);
+
+ return regmap_write(rstc->regmap, rstc->data->reset_reg,
+ BIT(rstc->data->reset[id]));
+}
+
+static const struct reset_control_ops meson_aoclk_reset_ops = {
+ .reset = meson_aoclk_do_reset,
+};
+
+int meson_aoclkc_probe(struct platform_device *pdev)
+{
+ struct meson_aoclk_reset_controller *rstc;
+ struct meson_aoclk_data *data;
+ struct device *dev = &pdev->dev;
+ struct regmap *regmap;
+ int ret, clkid;
+
+ data = (struct meson_aoclk_data *) of_device_get_match_data(dev);
+ if (!data)
+ return -ENODEV;
+
+ rstc = devm_kzalloc(dev, sizeof(*rstc), GFP_KERNEL);
+ if (!rstc)
+ return -ENOMEM;
+
+ regmap = syscon_node_to_regmap(of_get_parent(dev->of_node));
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "failed to get regmap\n");
+ return PTR_ERR(regmap);
+ }
+
+ /* Reset Controller */
+ rstc->data = data;
+ rstc->regmap = regmap;
+ rstc->reset.ops = &meson_aoclk_reset_ops;
+ rstc->reset.nr_resets = data->num_reset,
+ rstc->reset.of_node = dev->of_node;
+ ret = devm_reset_controller_register(dev, &rstc->reset);
+ if (ret) {
+ dev_err(dev, "failed to register reset controller\n");
+ return ret;
+ }
+
+ /*
+ * Populate regmap and register all clks
+ */
+ for (clkid = 0; clkid < data->num_clks; clkid++) {
+ data->clks[clkid]->map = regmap;
+
+ ret = devm_clk_hw_register(dev, data->hw_data->hws[clkid]);
+ if (ret)
+ return ret;
+ }
+
+ return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+ (void *) data->hw_data);
+}
diff --git a/drivers/clk/meson/meson-aoclk.h b/drivers/clk/meson/meson-aoclk.h
new file mode 100644
index 000000000000..ab2819e88922
--- /dev/null
+++ b/drivers/clk/meson/meson-aoclk.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+/*
+ * Copyright (c) 2017 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * Copyright (c) 2018 Amlogic, inc.
+ * Author: Qiufang Dai <qiufang.dai@amlogic.com>
+ * Author: Yixun Lan <yixun.lan@amlogic.com>
+ */
+
+#ifndef __MESON_AOCLK_H__
+#define __MESON_AOCLK_H__
+
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include "clk-regmap.h"
+
+struct meson_aoclk_data {
+ const unsigned int reset_reg;
+ const int num_reset;
+ const unsigned int *reset;
+ int num_clks;
+ struct clk_regmap **clks;
+ const struct clk_hw_onecell_data *hw_data;
+};
+
+struct meson_aoclk_reset_controller {
+ struct reset_controller_dev reset;
+ const struct meson_aoclk_data *data;
+ struct regmap *regmap;
+};
+
+int meson_aoclkc_probe(struct platform_device *pdev);
+#endif
--
2.17.0