[PATCH 2/8] habanalabs/gaudi: read div_sel value from firmware

From: Oded Gabbay
Date: Sun Jul 31 2022 - 06:50:58 EST


From: Ohad Sharabi <osharabi@xxxxxxxxx>

Even when running with unsecured f/w, we should read the PLL div_sel
value from the f/w as this register is always privileged.

Signed-off-by: Ohad Sharabi <osharabi@xxxxxxxxx>
Reviewed-by: Oded Gabbay <ogabbay@xxxxxxxxxx>
Signed-off-by: Oded Gabbay <ogabbay@xxxxxxxxxx>
---
drivers/misc/habanalabs/gaudi/gaudi.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 866dc4b891d6..7f52935dc603 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -899,12 +899,13 @@ static int gaudi_early_fini(struct hl_device *hdev)
*/
static int gaudi_fetch_psoc_frequency(struct hl_device *hdev)
{
- struct asic_fixed_properties *prop = &hdev->asic_prop;
u32 nr = 0, nf = 0, od = 0, div_fctr = 0, pll_clk, div_sel;
+ struct asic_fixed_properties *prop = &hdev->asic_prop;
u16 pll_freq_arr[HL_PLL_NUM_OUTPUTS], freq;
int rc;

- if (hdev->asic_prop.fw_security_enabled) {
+ if ((hdev->fw_components & FW_TYPE_LINUX) &&
+ (prop->fw_app_cpu_boot_dev_sts0 & CPU_BOOT_DEV_STS0_PLL_INFO_EN)) {
struct gaudi_device *gaudi = hdev->asic_specific;

if (!(gaudi->hw_cap_initialized & HW_CAP_CPU_Q))
--
2.25.1