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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2017-06-24 14:17:15 -0500 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-06-26 14:28:58 +1000 |
| commit | b0db1d7883094adb0fc51a7920075ca3d866d2c7 (patch) | |
| tree | a2a9864199e2732585639372ecf7bacfa33fa499 /hw/lpc.c | |
| parent | 0fe0b6f2c4bac4acffc568e3250c3a7b4144367f (diff) | |
| download | skiboot-b0db1d7883094adb0fc51a7920075ca3d866d2c7.zip skiboot-b0db1d7883094adb0fc51a7920075ca3d866d2c7.tar.gz skiboot-b0db1d7883094adb0fc51a7920075ca3d866d2c7.tar.bz2 | |
lpc: Enable "new" SerIRQ mode
So we don't have to clear the bits on EOI manually. This
works in conjunction with the DD2 test in psi.c
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'hw/lpc.c')
| -rw-r--r-- | hw/lpc.c | 10 |
1 files changed, 9 insertions, 1 deletions
@@ -94,6 +94,7 @@ DEFINE_LOG_ENTRY(OPAL_RC_LPC_SYNC_PERF, OPAL_PLATFORM_ERR_EVT, OPAL_LPC, #define LPC_HC_IRQSER_START_4CLK 0x00000000 #define LPC_HC_IRQSER_START_6CLK 0x01000000 #define LPC_HC_IRQSER_START_8CLK 0x02000000 +#define LPC_HC_IRQSER_AUTO_CLEAR 0x00800000 #define LPC_HC_IRQMASK 0x34 /* same bit defs as LPC_HC_IRQSTAT */ #define LPC_HC_IRQSTAT 0x38 #define LPC_HC_IRQ_SERIRQ0 0x80000000u /* all bits down to ... */ @@ -621,7 +622,14 @@ static void lpc_setup_serirq(struct lpcm *lpc) /* Check whether we should enable serirq */ if (mask & LPC_HC_IRQ_SERIRQ_ALL) { rc = opb_write(lpc, lpc_reg_opb_base + LPC_HC_IRQSER_CTRL, - LPC_HC_IRQSER_EN | LPC_HC_IRQSER_START_4CLK, 4); + LPC_HC_IRQSER_EN | + LPC_HC_IRQSER_START_4CLK | + /* + * New mode bit for P9N DD2.0 (ignored otherwise) + * when set we no longer have to manually clear + * the SerIRQs on EOI. + */ + LPC_HC_IRQSER_AUTO_CLEAR, 4); DBG_IRQ("LPC: SerIRQ enabled\n"); } else { rc = opb_write(lpc, lpc_reg_opb_base + LPC_HC_IRQSER_CTRL, |