| Message ID | 20191010203043.1241612-1-arnd@arndb.de (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | ARM: samsung platform cleanup | expand |
Hi Arnd, 2019年10月11日(金) 5:30 Arnd Bergmann <arnd@arndb.de>: > > 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, Thanks for the patch! Just one minor nit: It doesn't look very nice to pass a function pointer directly as platform data. Could we have a struct defined instead - with a kerneldoc comment describing the function pointer field? Best regards, Tomasz
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)
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(-)