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Subject[PATCH 1/2] clk: sunxi-ng: r40: rewrite init code to a platform driver
Date
As we need to register a regmap on the R40 CCU, there needs to be a
device structure bound to the CCU device node.

Rewrite the R40 CCU driver initial code to make it a proper platform
driver, thus we will have a platform device bound to it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
drivers/clk/sunxi-ng/ccu-sun8i-r40.c | 37 ++++++++++++++++++++++++++----------
1 file changed, 27 insertions(+), 10 deletions(-)

diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-r40.c b/drivers/clk/sunxi-ng/ccu-sun8i-r40.c
index 933f2e68f42a..bb94e2c44e86 100644
--- a/drivers/clk/sunxi-ng/ccu-sun8i-r40.c
+++ b/drivers/clk/sunxi-ng/ccu-sun8i-r40.c
@@ -12,6 +12,7 @@
*/

#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
#include <linux/of_address.h>

#include "ccu_common.h"
@@ -1250,17 +1251,17 @@ static struct ccu_mux_nb sun8i_r40_cpu_nb = {
.bypass_index = 1, /* index of 24 MHz oscillator */
};

-static void __init sun8i_r40_ccu_setup(struct device_node *node)
+static int sun8i_r40_ccu_probe(struct platform_device *pdev)
{
+ struct resource *res;
void __iomem *reg;
u32 val;
+ int ret;

- reg = of_io_request_and_map(node, 0, of_node_full_name(node));
- if (IS_ERR(reg)) {
- pr_err("%s: Could not map the clock registers\n",
- of_node_full_name(node));
- return;
- }
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(reg))
+ return PTR_ERR(reg);

/* Force the PLL-Audio-1x divider to 4 */
val = readl(reg + SUN8I_R40_PLL_AUDIO_REG);
@@ -1277,7 +1278,9 @@ static void __init sun8i_r40_ccu_setup(struct device_node *node)
val &= ~GENMASK(25, 20);
writel(val, reg + SUN8I_R40_USB_CLK_REG);

- sunxi_ccu_probe(node, reg, &sun8i_r40_ccu_desc);
+ ret = sunxi_ccu_probe(pdev->dev.of_node, reg, &sun8i_r40_ccu_desc);
+ if (ret)
+ return ret;

/* Gate then ungate PLL CPU after any rate changes */
ccu_pll_notifier_register(&sun8i_r40_pll_cpu_nb);
@@ -1285,6 +1288,20 @@ static void __init sun8i_r40_ccu_setup(struct device_node *node)
/* Reparent CPU during PLL CPU rate changes */
ccu_mux_notifier_register(pll_cpu_clk.common.hw.clk,
&sun8i_r40_cpu_nb);
+
+ return 0;
}
-CLK_OF_DECLARE(sun8i_r40_ccu, "allwinner,sun8i-r40-ccu",
- sun8i_r40_ccu_setup);
+
+static const struct of_device_id sun8i_r40_ccu_ids[] = {
+ { .compatible = "allwinner,sun8i-r40-ccu" },
+ { }
+};
+
+static struct platform_driver sun8i_r40_ccu_driver = {
+ .probe = sun8i_r40_ccu_probe,
+ .driver = {
+ .name = "sun8i-r40-ccu",
+ .of_match_table = sun8i_r40_ccu_ids,
+ },
+};
+builtin_platform_driver(sun8i_r40_ccu_driver);
--
2.13.6
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