clk: mediatek: Add mtk_clk_simple_probe() to simplify clock providers

Most of subsystem clock providers only need to register clock gates
in their probe() function.
To reduce the duplicated code by add a generic function.

Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
Link: https://lore.kernel.org/r/20210726105719.15793-9-chun-jie.chen@mediatek.com
Reviewed-by: Ikjoon Jang <ikjn@chromium.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index 37d2aa3..4b6096c 100644 (file)
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -13,6 +13,7 @@
 #include <linux/clkdev.h>
 #include <linux/mfd/syscon.h>
 #include <linux/device.h>
+#include <linux/of_device.h>
 
 #include "clk-mtk.h"
 #include "clk-gate.h"
@@ -286,3 +287,25 @@ void mtk_clk_register_dividers(const struct mtk_clk_divider *mcds,
                        clk_data->clks[mcd->id] = clk;
        }
 }
+
+int mtk_clk_simple_probe(struct platform_device *pdev)
+{
+       const struct mtk_clk_desc *mcd;
+       struct clk_onecell_data *clk_data;
+       struct device_node *node = pdev->dev.of_node;
+       int r;
+
+       mcd = of_device_get_match_data(&pdev->dev);
+       if (!mcd)
+               return -EINVAL;
+
+       clk_data = mtk_alloc_clk_data(mcd->num_clks);
+       if (!clk_data)
+               return -ENOMEM;
+
+       r = mtk_clk_register_gates(node, mcd->clks, mcd->num_clks, clk_data);
+       if (r)
+               return r;
+
+       return of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
+}

diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index 31c7cb3..7de41c3 100644 (file)
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -10,6 +10,7 @@
 #include <linux/regmap.h>
 #include <linux/bitops.h>
 #include <linux/clk-provider.h>
+#include <linux/platform_device.h>
 
 struct clk;
 struct clk_onecell_data;
@@ -250,4 +251,11 @@ void mtk_register_reset_controller(struct device_node *np,
 void mtk_register_reset_controller_set_clr(struct device_node *np,
        unsigned int num_regs, int regofs);
 
+struct mtk_clk_desc {
+       const struct mtk_gate *clks;
+       size_t num_clks;
+};
+
+int mtk_clk_simple_probe(struct platform_device *pdev);
+
 #endif /* __DRV_CLK_MTK_H */