[PATCH 01/36] ARM: samsung: make S3C24XX_MISCCR access indirect

Arnd Bergmann
2019-10-10T20:30:59Z

The clk driver uses both a function call into an exported
platform file and a direct register access to a hardcoded
virtual address for accessing the MISCCR register, both
become are a problem for a multiplatform kernel because
of the header file dependency.

Make this an indirect function call through platform data
instead.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/arm/mach-s3c24xx/common.c | 3 +++
drivers/clk/samsung/clk-s3c2410-dclk.c | 10 ++++------
2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mach-s3c24xx/common.c b/arch/arm/mach-s3c24xx/common.c
index 3dc029c2d2cb..ebf6bde67816 100644
--- a/arch/arm/mach-s3c24xx/common.c
+++ b/arch/arm/mach-s3c24xx/common.c
@@ -667,5 +667,8 @@ struct platform_device s3c2410_device_dclk = {
.id = 0,
.num_resources = ARRAY_SIZE(s3c2410_dclk_resource),
.resource = s3c2410_dclk_resource,
+ .dev = {
+ .platform_data = s3c2410_modify_misccr,
+ },
};
#endif
diff --git a/drivers/clk/samsung/clk-s3c2410-dclk.c b/drivers/clk/samsung/clk-s3c2410-dclk.c
index 1281672cb00e..fbcec0252c45 100644
--- a/drivers/clk/samsung/clk-s3c2410-dclk.c
+++ b/drivers/clk/samsung/clk-s3c2410-dclk.c
@@ -14,10 +14,6 @@
#include <linux/module.h>
#include "clk.h"

-/* legacy access to misccr, until dt conversion is finished */
-#include <mach/hardware.h>
-#include <mach/regs-gpio.h>
-
#define MUX_DCLK0 0
#define MUX_DCLK1 1
#define DIV_DCLK0 2
@@ -52,6 +48,7 @@ struct s3c24xx_clkout {
struct clk_hw hw;
u32 mask;
u8 shift;
+ unsigned int (*modify_misccr)(unsigned int clr, unsigned int chg);
};

#define to_s3c24xx_clkout(_hw) container_of(_hw, struct s3c24xx_clkout, hw)
@@ -62,7 +59,7 @@ static u8 s3c24xx_clkout_get_parent(struct clk_hw *hw)
int num_parents = clk_hw_get_num_parents(hw);
u32 val;

- val = readl_relaxed(S3C24XX_MISCCR) >> clkout->shift;
+ val = clkout->modify_misccr(0, 0) >> clkout->shift;
val >>= clkout->shift;
val &= clkout->mask;

@@ -76,7 +73,7 @@ static int s3c24xx_clkout_set_parent(struct clk_hw *hw, u8 index)
{
struct s3c24xx_clkout *clkout = to_s3c24xx_clkout(hw);

- s3c2410_modify_misccr((clkout->mask << clkout->shift),
+ clkout->modify_misccr((clkout->mask << clkout->shift),
(index << clkout->shift));

return 0;
@@ -110,6 +107,7 @@ static struct clk_hw *s3c24xx_register_clkout(struct device *dev,
clkout->shift = shift;
clkout->mask = mask;
clkout->hw.init = &init;
+ clkout->modify_misccr = dev->platform_data;

ret = clk_hw_register(dev, &clkout->hw);
if (ret)
--
2.20.0