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ARM: imx: enable bus auto clock gating function for i.mx6sll 

i.MX6SLL has HW bus auto clock gating function, enable
it by default to save VDD_SOC_IN power, about 5% ~ 20%
saved depends on different use cases.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Anson Huang 2018-06-22 13:32:48 +08:00 committed by Shawn Guo
parent 83ef5da052
commit d082852f40
2 changed files with 12 additions and 2 deletions
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11
arch/arm/mach-imx/pm-imx6.c
View File

@ -648,10 +648,17 @@ void __init imx6dl_pm_init(void)
void __init imx6sl_pm_init(void)
{
if (cpu_is_imx6sl())
struct regmap *gpr;
if (cpu_is_imx6sl()) {
imx6_pm_common_init(&imx6sl_pm_data);
else
} else {
imx6_pm_common_init(&imx6sll_pm_data);
gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
if (!IS_ERR(gpr))
regmap_update_bits(gpr, IOMUXC_GPR5,
IMX6SLL_GPR5_AFCG_X_BYPASS_MASK, 0);
}
}
void __init imx6sx_pm_init(void)

3
include/linux/mfd/syscon/imx6q-iomuxc-gpr.h
View File

@ -457,4 +457,7 @@
#define MCLK_DIR(x) (x == 1 ? IMX6UL_GPR1_SAI1_MCLK_DIR : x == 2 ? \
IMX6UL_GPR1_SAI2_MCLK_DIR : IMX6UL_GPR1_SAI3_MCLK_DIR)
/* For imx6sll iomux gpr register field define */
#define IMX6SLL_GPR5_AFCG_X_BYPASS_MASK (0x1f << 11)
#endif /* __LINUX_IMX6Q_IOMUXC_GPR_H */