Hi,
On Monday, August 26, 2013 01:38:32 PM Mateusz Krawczuk wrote:
> This patch adds code that sets correct parents and rates for clocks
> used by FIMC and FIMD on Goni board.
>
> Signed-off-by: Mateusz Krawczuk <m.krawczuk@xxxxxxxxxxxxxxxxxxx>
> ---
> arch/arm/mach-s5pv210/mach-goni.c | 48 +++++++++++++++++++++++++++++++++++++++
> 1 file changed, 48 insertions(+)
>
> diff --git a/arch/arm/mach-s5pv210/mach-goni.c b/arch/arm/mach-s5pv210/mach-goni.c
> index e5cd9fb..309b5ad 100644
> --- a/arch/arm/mach-s5pv210/mach-goni.c
> +++ b/arch/arm/mach-s5pv210/mach-goni.c
> @@ -55,6 +55,7 @@
> #include <media/s5p_fimc.h>
> #include <media/noon010pc30.h>
>
> +#include <linux/clk.h>
> #include "common.h"
>
> /* Following are default values for UCON, ULCON and UFCON UART registers */
> @@ -195,6 +196,49 @@ static struct platform_device goni_spi_gpio = {
> },
> };
>
> +static void set_fimd_clock(void)
It can be marked as __init.
> +{
> + struct clk *lcd_clk, *parent_clk;
> +
> + lcd_clk = clk_get(NULL, "sclk_fimd");
> + parent_clk = clk_get(NULL, "mout_mpll");
> + clk_set_parent(lcd_clk, parent_clk);
> + clk_set_rate(lcd_clk, clk_get_rate(parent_clk)/3);
> +
> + clk_put(parent_clk);
> + clk_put(lcd_clk);
> +}
> +
> +static void set_fimc_clock(void)
ditto
> +{
> + struct clk *cam0_clk, *cam1_clk, *fimc2_clk, *fimc1_clk,
> + *fimc0_clk, *parent_clk, *vpll_clk, *csis_clk;
> +
> + parent_clk = clk_get(NULL, "mout_mpll");
> + vpll_clk = clk_get(NULL, "mout_vpll");
> + cam0_clk = clk_get(NULL, "mout_cam0");
> + cam1_clk = clk_get(NULL, "mout_cam1");
> + fimc2_clk = clk_get(NULL, "mout_fimc2");
> + fimc1_clk = clk_get(NULL, "mout_fimc1");
> + fimc0_clk = clk_get(NULL, "mout_fimc0");
> + csis_clk = clk_get(NULL, "mout_csis");
Shouldn't you check clk_get() return value with IS_ERR()?
You can do one big check here and than just do clk_put() if !IS_ERR(), i.e.
if (IS_ERR(parent_clk) || IS_ERR(vpll_clk) || ...)
...
clk_set_parent()
...
if (!IS_ERR(parent_clk))
clk_put(parent_clk);
...
> + clk_set_parent(cam0_clk, vpll_clk);
> + clk_set_parent(cam1_clk, vpll_clk);
> + clk_set_parent(fimc2_clk, parent_clk);
> + clk_set_parent(fimc1_clk, parent_clk);
> + clk_set_parent(fimc0_clk, parent_clk);
> + clk_set_parent(csis_clk, parent_clk);
> +
> + clk_put(parent_clk);
> + clk_put(vpll_clk);
> + clk_put(cam0_clk);
> + clk_put(cam1_clk);
> + clk_put(fimc2_clk);
> + clk_put(fimc1_clk);
> + clk_put(fimc0_clk);
> +}
> +
> /* KEYPAD */
> static uint32_t keymap[] __initdata = {
> /* KEY(row, col, keycode) */
> @@ -931,6 +975,10 @@ static void __init goni_machine_init(void)
> s3c_i2c2_set_platdata(&i2c2_data);
> i2c_register_board_info(2, i2c2_devs, ARRAY_SIZE(i2c2_devs));
>
> + /* FIMD AND FIMC set clock config */
> + set_fimd_clock();
> + set_fimc_clock();
> +
> /* PMIC */
> goni_pmic_init();
> i2c_register_board_info(AP_I2C_GPIO_PMIC_BUS_4, i2c_gpio_pmic_devs,
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
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