On 21/09/2020 13:03, Hsin-Hsiung Wang wrote:
Add arbiter capability for pwrap driver.
Can you provide a bit more verbose commit message, please.
This patch is preparing for adding mt6873/8192 pwrap support.
Signed-off-by: Hsin-Hsiung Wang <[email protected]>
---
drivers/soc/mediatek/mtk-pmic-wrap.c | 57 ++++++++++++++++++++++++++++++------
1 file changed, 48 insertions(+), 9 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c
b/drivers/soc/mediatek/mtk-pmic-wrap.c
index c897205..149bf02 100644
--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
+++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
@@ -25,10 +25,12 @@
/* macro for wrapper status */
#define PWRAP_GET_WACS_RDATA(x) (((x) >> 0) & 0x0000ffff)
+#define PWRAP_GET_WACS_ARB_FSM(x) (((x) >> 1) & 0x00000007)
#define PWRAP_GET_WACS_FSM(x) (((x) >> 16) & 0x00000007)
#define PWRAP_GET_WACS_REQ(x) (((x) >> 19) & 0x00000001)
#define PWRAP_STATE_SYNC_IDLE0 BIT(20)
#define PWRAP_STATE_INIT_DONE0 BIT(21)
+#define PWRAP_STATE_INIT_DONE1 BIT(15)
/* macro for WACS FSM */
#define PWRAP_WACS_FSM_IDLE 0x00
@@ -74,6 +76,7 @@
#define PWRAP_CAP_DCM BIT(2)
#define PWRAP_CAP_INT1_EN BIT(3)
#define PWRAP_CAP_WDT_SRC1 BIT(4)
+#define PWRAP_CAP_ARB BIT(5)
/* defines for slave device wrapper registers */
enum dew_regs {
@@ -340,6 +343,8 @@ enum pwrap_regs {
PWRAP_DCM_DBC_PRD,
PWRAP_EINT_STA0_ADR,
PWRAP_EINT_STA1_ADR,
+ PWRAP_SWINF_2_WDATA_31_0,
+ PWRAP_SWINF_2_RDATA_31_0,
/* MT2701 only regs */
PWRAP_ADC_CMD_ADDR,
@@ -1108,14 +1113,22 @@ static void pwrap_writel(struct pmic_wrapper *wrp, u32
val, enum pwrap_regs reg)
static bool pwrap_is_fsm_idle(struct pmic_wrapper *wrp)
{
- u32 val = pwrap_readl(wrp, PWRAP_WACS2_RDATA);
+ u32 val;
+
+ val = pwrap_readl(wrp, PWRAP_WACS2_RDATA);
+ if (HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB))
+ return PWRAP_GET_WACS_ARB_FSM(val) == PWRAP_WACS_FSM_IDLE;
return PWRAP_GET_WACS_FSM(val) == PWRAP_WACS_FSM_IDLE;
}
static bool pwrap_is_fsm_vldclr(struct pmic_wrapper *wrp)
{
- u32 val = pwrap_readl(wrp, PWRAP_WACS2_RDATA);
+ u32 val;
+
+ val = pwrap_readl(wrp, PWRAP_WACS2_RDATA);
+ if (HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB))
+ return PWRAP_GET_WACS_ARB_FSM(val) == PWRAP_WACS_FSM_WFVLDCLR;
return PWRAP_GET_WACS_FSM(val) == PWRAP_WACS_FSM_WFVLDCLR;
}
@@ -1165,6 +1178,7 @@ static int pwrap_wait_for_state(struct pmic_wrapper *wrp,
static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
{
int ret;
+ u32 val;
ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
if (ret) {
@@ -1172,13 +1186,21 @@ static int pwrap_read16(struct pmic_wrapper *wrp, u32
adr, u32 *rdata)
return ret;
}
- pwrap_writel(wrp, (adr >> 1) << 16, PWRAP_WACS2_CMD);
+ if (HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB))
+ val = adr;
+ else
+ val = (adr >> 1) << 16;
+ pwrap_writel(wrp, val, PWRAP_WACS2_CMD);
ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_vldclr);
if (ret)
return ret;
- *rdata = PWRAP_GET_WACS_RDATA(pwrap_readl(wrp, PWRAP_WACS2_RDATA));
+ if (HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB))
+ val = pwrap_readl(wrp, PWRAP_SWINF_2_RDATA_31_0);
+ else
+ val = pwrap_readl(wrp, PWRAP_WACS2_RDATA);
+ *rdata = PWRAP_GET_WACS_RDATA(val);
pwrap_writel(wrp, 1, PWRAP_WACS2_VLDCLR);
@@ -1228,8 +1250,13 @@ static int pwrap_write16(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
return ret;
}
- pwrap_writel(wrp, (1 << 31) | ((adr >> 1) << 16) | wdata,
- PWRAP_WACS2_CMD);
+ if (!HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB)) {
Please switch if's so that we take the else branch on the arbiter not present
case. Or the other way round, just make it uniform, where possible, of course.
+ pwrap_writel(wrp, BIT(31) | ((adr >> 1) << 16) | wdata,
+ PWRAP_WACS2_CMD);
+ } else {
+ pwrap_writel(wrp, wdata, PWRAP_SWINF_2_WDATA_31_0);
+ pwrap_writel(wrp, BIT(29) | adr, PWRAP_WACS2_CMD);
+ }
return 0;
}
@@ -2022,6 +2049,7 @@ MODULE_DEVICE_TABLE(of, of_pwrap_match_tbl);
static int pwrap_probe(struct platform_device *pdev)
{
int ret, irq;
+ u32 mask_done;
struct pmic_wrapper *wrp;
struct device_node *np = pdev->dev.of_node;
const struct of_device_id *of_slave_id = NULL;
@@ -2116,14 +2144,21 @@ static int pwrap_probe(struct platform_device *pdev)
}
}
- if (!(pwrap_readl(wrp, PWRAP_WACS2_RDATA) & PWRAP_STATE_INIT_DONE0)) {
+ if (HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB))
+ mask_done = PWRAP_STATE_INIT_DONE1;
+ else
+ mask_done = PWRAP_STATE_INIT_DONE0;
+
+ if (!(pwrap_readl(wrp, PWRAP_WACS2_RDATA) & mask_done)) {
dev_dbg(wrp->dev, "initialization isn't finished\n");
ret = -ENODEV;
goto err_out2;
}
/* Initialize watchdog, may not be done by the bootloader */
- pwrap_writel(wrp, 0xf, PWRAP_WDT_UNIT);
+ if (!HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB))
+ pwrap_writel(wrp, 0xf, PWRAP_WDT_UNIT);
+
Whats the connection between an arbiter being present and the watchdog?
Regards,
Matthias
