On Tue, Aug 04, 2015 at 09:54:19PM +0800, Scott Shu wrote:
> This adds a CPU power domain driver for the Mediatek SCPSYS unit on
> MT6580.
>
> Signed-off-by: Scott Shu <scott.shu@xxxxxxxxxxxx>
> ---
> drivers/soc/mediatek/mtk-scpsys.c | 250 +++++++++++++++++++++++++++++++++++
> include/linux/soc/mediatek/scpsys.h | 9 ++
> 2 files changed, 259 insertions(+)
> create mode 100644 include/linux/soc/mediatek/scpsys.h
>
> diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> index 43a79ed..ca0f2dd 100644
> --- a/drivers/soc/mediatek/mtk-scpsys.c
> +++ b/drivers/soc/mediatek/mtk-scpsys.c
> @@ -15,18 +15,30 @@
> #include <linux/io.h>
> #include <linux/kernel.h>
> #include <linux/mfd/syscon.h>
> +#include <linux/of.h>
> #include <linux/of_device.h>
> +#include <linux/of_address.h>
> #include <linux/platform_device.h>
> #include <linux/pm_domain.h>
> #include <linux/regmap.h>
> #include <linux/soc/mediatek/infracfg.h>
> +#include <linux/soc/mediatek/scpsys.h>
> #include <dt-bindings/power/mt8173-power.h>
>
> +#define SPM_POWERON_CONFIG_SET 0x0000
> +#define SPM_CA7_CPU0_PWR_CON 0x0200
> #define SPM_VDE_PWR_CON 0x0210
> #define SPM_MFG_PWR_CON 0x0214
> +#define SPM_CA7_CPU1_PWR_CON 0x0218
> +#define SPM_CA7_CPU2_PWR_CON 0x021c
> +#define SPM_CA7_CPU3_PWR_CON 0x0220
> #define SPM_VEN_PWR_CON 0x0230
> #define SPM_ISP_PWR_CON 0x0238
> #define SPM_DIS_PWR_CON 0x023c
> +#define SPM_CA7_CPU0_L1_PDN 0x025c
> +#define SPM_CA7_CPU1_L1_PDN 0x0264
> +#define SPM_CA7_CPU2_L1_PDN 0x026c
> +#define SPM_CA7_CPU3_L1_PDN 0x0274
> #define SPM_VEN2_PWR_CON 0x0298
> #define SPM_AUDIO_PWR_CON 0x029c
> #define SPM_MFG_2D_PWR_CON 0x02c0
> @@ -34,12 +46,20 @@
> #define SPM_USB_PWR_CON 0x02cc
> #define SPM_PWR_STATUS 0x060c
> #define SPM_PWR_STATUS_2ND 0x0610
> +#define SPM_SLEEP_TIMER_STA 0x0720
>
> +/* bit definition in SPM_CA7_CPUx_PWR_CON */
> #define PWR_RST_B_BIT BIT(0)
> #define PWR_ISO_BIT BIT(1)
> #define PWR_ON_BIT BIT(2)
> #define PWR_ON_2ND_BIT BIT(3)
> #define PWR_CLK_DIS_BIT BIT(4)
> +#define SRAM_CKISO_BIT BIT(5)
> +#define SRAM_ISOINT_B_BIT BIT(6)
> +
> +/* bit definition in SPM_CA7_CPUx_L1_PDN */
> +#define L1_PDN BIT(0)
> +#define L1_PDN_ACK BIT(8)
>
> #define PWR_STATUS_DISP BIT(3)
> #define PWR_STATUS_MFG BIT(4)
> @@ -52,6 +72,28 @@
> #define PWR_STATUS_AUDIO BIT(24)
> #define PWR_STATUS_USB BIT(25)
>
> +#define MT6580_MAX_CPUS 4
> +
> +#ifdef CONFIG_SMP
> +static DEFINE_SPINLOCK(spm_cpu_lock);
> +
> +static void __iomem *spm_cpu_base;
> +
> +static const u32 spm_cpu_pwr_con[MT6580_MAX_CPUS] = {
> + SPM_CA7_CPU0_PWR_CON,
> + SPM_CA7_CPU1_PWR_CON,
> + SPM_CA7_CPU2_PWR_CON,
> + SPM_CA7_CPU3_PWR_CON,
> +};
> +
> +static const u32 spm_cpu_l1_pdn[MT6580_MAX_CPUS] = {
> + SPM_CA7_CPU0_L1_PDN,
> + SPM_CA7_CPU1_L1_PDN,
> + SPM_CA7_CPU2_L1_PDN,
> + SPM_CA7_CPU3_L1_PDN,
> +};
> +#endif
> +
> enum clk_id {
> MT8173_CLK_MM,
> MT8173_CLK_MFG,
> @@ -485,3 +527,211 @@ static struct platform_driver scpsys_drv = {
> };
>
> module_platform_driver_probe(scpsys_drv, scpsys_probe);
> +
> +#define SPM_REGWR_EN BIT(0)
> +#define SPM_PROJECT_CODE 0x0B16
> +
> +#ifdef CONFIG_SMP
> +int spm_cpu_mtcmos_on(int cpu)
The idea was that the code that the current driver has in
scpsys_power_on/scpsys_power_off is shared with this function. If we
don't do this then it indeed doesn't make much sense to put it into the
same file.
>From what I see we would need to change the prototype to something like
static int __scpsys_power_on(struct scp_domain_data *)
(maybe with some additional base addresses and stuff)
struct scp_domain_data would additionally need sram_isoint_b and sram_ckiso
members.
Sascha
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