diff options
Diffstat (limited to 'drivers/clk/ti/clk-3xxx.c')
| -rw-r--r-- | drivers/clk/ti/clk-3xxx.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/drivers/clk/ti/clk-3xxx.c b/drivers/clk/ti/clk-3xxx.c index 5489ad8c07d4..58879f0b7949 100644 --- a/drivers/clk/ti/clk-3xxx.c +++ b/drivers/clk/ti/clk-3xxx.c @@ -28,6 +28,124 @@ */ #define DPLL5_FREQ_FOR_USBHOST 120000000 +#define OMAP3430ES2_ST_DSS_IDLE_SHIFT 1 +#define OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT 5 +#define OMAP3430ES2_ST_SSI_IDLE_SHIFT 8 + +#define OMAP34XX_CM_IDLEST_VAL 1 + +/** + * omap3430es2_clk_ssi_find_idlest - return CM_IDLEST info for SSI + * @clk: struct clk * being enabled + * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into + * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into + * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator + * + * The OMAP3430ES2 SSI target CM_IDLEST bit is at a different shift + * from the CM_{I,F}CLKEN bit. Pass back the correct info via + * @idlest_reg and @idlest_bit. No return value. + */ +static void omap3430es2_clk_ssi_find_idlest(struct clk_hw_omap *clk, + void __iomem **idlest_reg, + u8 *idlest_bit, + u8 *idlest_val) +{ + u32 r; + + r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); + *idlest_reg = (__force void __iomem *)r; + *idlest_bit = OMAP3430ES2_ST_SSI_IDLE_SHIFT; + *idlest_val = OMAP34XX_CM_IDLEST_VAL; +} + +const struct clk_hw_omap_ops clkhwops_omap3430es2_ssi_wait = { + .find_idlest = omap3430es2_clk_ssi_find_idlest, + .find_companion = omap2_clk_dflt_find_companion, +}; + +const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_ssi_wait = { + .allow_idle = omap2_clkt_iclk_allow_idle, + .deny_idle = omap2_clkt_iclk_deny_idle, + .find_idlest = omap3430es2_clk_ssi_find_idlest, + .find_companion = omap2_clk_dflt_find_companion, +}; + +/** + * omap3430es2_clk_dss_usbhost_find_idlest - CM_IDLEST info for DSS, USBHOST + * @clk: struct clk * being enabled + * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into + * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into + * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator + * + * Some OMAP modules on OMAP3 ES2+ chips have both initiator and + * target IDLEST bits. For our purposes, we are concerned with the + * target IDLEST bits, which exist at a different bit position than + * the *CLKEN bit position for these modules (DSS and USBHOST) (The + * default find_idlest code assumes that they are at the same + * position.) No return value. + */ +static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk_hw_omap *clk, + void __iomem **idlest_reg, + u8 *idlest_bit, + u8 *idlest_val) +{ + u32 r; + + r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); + *idlest_reg = (__force void __iomem *)r; + /* USBHOST_IDLE has same shift */ + *idlest_bit = OMAP3430ES2_ST_DSS_IDLE_SHIFT; + *idlest_val = OMAP34XX_CM_IDLEST_VAL; +} + +const struct clk_hw_omap_ops clkhwops_omap3430es2_dss_usbhost_wait = { + .find_idlest = omap3430es2_clk_dss_usbhost_find_idlest, + .find_companion = omap2_clk_dflt_find_companion, +}; + +const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_dss_usbhost_wait = { + .allow_idle = omap2_clkt_iclk_allow_idle, + .deny_idle = omap2_clkt_iclk_deny_idle, + .find_idlest = omap3430es2_clk_dss_usbhost_find_idlest, + .find_companion = omap2_clk_dflt_find_companion, +}; + +/** + * omap3430es2_clk_hsotgusb_find_idlest - return CM_IDLEST info for HSOTGUSB + * @clk: struct clk * being enabled + * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into + * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into + * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator + * + * The OMAP3430ES2 HSOTGUSB target CM_IDLEST bit is at a different + * shift from the CM_{I,F}CLKEN bit. Pass back the correct info via + * @idlest_reg and @idlest_bit. No return value. + */ +static void omap3430es2_clk_hsotgusb_find_idlest(struct clk_hw_omap *clk, + void __iomem **idlest_reg, + u8 *idlest_bit, + u8 *idlest_val) +{ + u32 r; + + r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); + *idlest_reg = (__force void __iomem *)r; + *idlest_bit = OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT; + *idlest_val = OMAP34XX_CM_IDLEST_VAL; +} + +const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_hsotgusb_wait = { + .allow_idle = omap2_clkt_iclk_allow_idle, + .deny_idle = omap2_clkt_iclk_deny_idle, + .find_idlest = omap3430es2_clk_hsotgusb_find_idlest, + .find_companion = omap2_clk_dflt_find_companion, +}; + +const struct clk_hw_omap_ops clkhwops_omap3430es2_hsotgusb_wait = { + .find_idlest = omap3430es2_clk_hsotgusb_find_idlest, + .find_companion = omap2_clk_dflt_find_companion, +}; + static struct ti_dt_clk omap3xxx_clks[] = { DT_CLK(NULL, "apb_pclk", "dummy_apb_pclk"), DT_CLK(NULL, "omap_32k_fck", "omap_32k_fck"), |