Hi,
On 09/06/2023 13:48, Dmitry Rokosov wrote:
Hello Neil,
On Thu, Jun 08, 2023 at 02:53:50PM +0200, Neil Armstrong wrote:
On 08/06/2023 14:45, Jerome Brunet wrote:
+struct meson_a1_pll_clks {
+ struct clk_hw **hw_clks;
+ unsigned int hw_clk_num;
+};
+
+static struct meson_a1_pll_clks a1_pll_clks = {
+ .hw_clks = a1_pll_hw_clks,
+ .hw_clk_num = ARRAY_SIZE(a1_pll_hw_clks),
+};
+
+static struct clk_hw *meson_a1_pll_hw_get(struct of_phandle_args *clkspec, void *clk_data)
+{
+ const struct meson_a1_pll_clks *data = clk_data;
+ unsigned int idx = clkspec->args[0];
+
+ if (idx >= data->hw_clk_num) {
+ pr_err("%s: invalid index %u\n", __func__, idx);
+ return ERR_PTR(-EINVAL);
+ }
+
+ return data->hw_clks[idx];
+}
I'd prefer to have a single struct type and and single custom
callback for the different SoC please.
Sure, I've written a common code for that, but I have a hard time finding
a proper naming for it... so I choosed meson-clkc since it could have
more common helper code for duplicated code over the clk driver:
===================================><============================================================================
diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
index 8ce846fdbe43..9070dcfd9e71 100644
--- a/drivers/clk/meson/Kconfig
+++ b/drivers/clk/meson/Kconfig
@@ -30,6 +30,9 @@ config COMMON_CLK_MESON_VID_PLL_DIV
tristate
select COMMON_CLK_MESON_REGMAP
+config COMMON_CLK_MESON_CLKC
+ tristate
+
config COMMON_CLK_MESON_AO_CLKC
tristate
select COMMON_CLK_MESON_REGMAP
diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
index d5288662881d..13c6db466986 100644
--- a/drivers/clk/meson/Makefile
+++ b/drivers/clk/meson/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
# Amlogic clock drivers
+obj-$(CONFIG_COMMON_CLK_MESON_CLKC) += meson-clkc.o
obj-$(CONFIG_COMMON_CLK_MESON_AO_CLKC) += meson-aoclk.o
obj-$(CONFIG_COMMON_CLK_MESON_CPU_DYNDIV) += clk-cpu-dyndiv.o
obj-$(CONFIG_COMMON_CLK_MESON_DUALDIV) += clk-dualdiv.o
diff --git a/drivers/clk/meson/meson-clkc.c b/drivers/clk/meson/meson-clkc.c
new file mode 100644
index 000000000000..fa98b9d09011
--- /dev/null
+++ b/drivers/clk/meson/meson-clkc.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2023 Neil Armstrong <neil.armstrong@xxxxxxxxxx>
+ */
+
+#include <linux/of_device.h>
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include "meson-clkc.h"
+
+struct clk_hw *meson_clk_hw_get(struct of_phandle_args *clkspec, void *clk_hw_data)
+{
+ const struct meson_clk_hw_data *data = clk_hw_data;
+ unsigned int idx = clkspec->args[0];
+
+ if (idx >= data->num) {
+ pr_err("%s: invalid index %u\n", __func__, idx);
+ return ERR_PTR(-EINVAL);
+ }
+
+ return data->hws[idx];
+}
+EXPORT_SYMBOL_GPL(meson_clk_hw_get);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/clk/meson/meson-clkc.h b/drivers/clk/meson/meson-clkc.h
new file mode 100644
index 000000000000..e3bad2aa17eb
--- /dev/null
+++ b/drivers/clk/meson/meson-clkc.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+/*
+ * Copyright (c) 2023 Neil Armstrong <neil.armstrong@xxxxxxxxxx>
+ */
+
+#ifndef __MESON_HW_CLKC_H__
+#define __MESON_HW_CLKC_H__
+
+#include <linux/of_device.h>
+#include <linux/clk-provider.h>
+
+struct meson_clk_hw_data {
+ struct clk_hw **hws;
+ unsigned int num;
+};
+
+struct clk_hw *meson_clk_hw_get(struct of_phandle_args *clkspec, void *clk_hw_data);
+
+#endif
===================================><============================================================================
If it's ok I'll send a v2 using this.
Thanks,
Neil
In addition, I propose consolidating the probe() routine of the a1
clocks into a common part, which can be utilized for s4 and other
similar clocks. This solution was presented in the early a1 review
stages of this patch set.
https://lore.kernel.org/linux-amlogic/20221201225703.6507-7-ddrokosov@xxxxxxxxxxxxxx/
Maybe, it can be generalized for the all meson clock controller drivers.
Sure, the goal of that is to get rid of NR_CLKS & private IDS only,
then yes afterwards any common clkc function will be welcome !
Neil
