The hip06 D03 and hip07 D05 boards have different
reference clock frequencies for the SAS controller.
Register PHY_CTRL needs to be programmed differently
according to this frequency, so add support for this.
The default register setting in PHY_CTRL is for 50MHz,
so only update this register when the refclk frequency
is 66MHz.
For ACPI we expect the _RST handler to set the correct
value for PHY_CTRL (we're forced to take different
approach for DT and ACPI as ACPI does not support
fixed-clock device).
Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
Signed-off-by: Xiang Chen <chenxiang66@xxxxxxxxxxxxx>
---
drivers/scsi/hisi_sas/hisi_sas.h | 2 ++
drivers/scsi/hisi_sas/hisi_sas_main.c | 7 +++++++
drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 4 +++-
3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
index 72c9852..64046c5 100644
--- a/drivers/scsi/hisi_sas/hisi_sas.h
+++ b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -13,6 +13,7 @@
#define _HISI_SAS_H_
#include <linux/acpi.h>
+#include <linux/clk.h>
#include <linux/dmapool.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
@@ -183,6 +184,7 @@ struct hisi_hba {
u32 ctrl_reset_reg;
u32 ctrl_reset_sts_reg;
u32 ctrl_clock_ena_reg;
+ u32 refclk_frequency_mhz;
u8 sas_addr[SAS_ADDR_SIZE];
int n_phy;
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 2f872f7..9afc697 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1396,6 +1396,7 @@ static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
struct hisi_hba *hisi_hba;
struct device *dev = &pdev->dev;
struct device_node *np = pdev->dev.of_node;
+ struct clk *refclk;
shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
if (!shost)
@@ -1432,6 +1433,12 @@ static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
goto err_out;
}
+ refclk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(refclk))
+ dev_info(dev, "no ref clk property\n");
+ else
+ hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
+
if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
goto err_out;
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index 758e06f..0763b47 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -836,7 +836,9 @@ static void init_reg_v2_hw(struct hisi_hba *hisi_hba)
hisi_sas_phy_write32(hisi_hba, i, SL_RX_BCAST_CHK_MSK, 0x0);
hisi_sas_phy_write32(hisi_hba, i, CHL_INT_COAL_EN, 0x0);
hisi_sas_phy_write32(hisi_hba, i, PHYCTRL_OOB_RESTART_MSK, 0x0);
- hisi_sas_phy_write32(hisi_hba, i, PHY_CTRL, 0x199B694);
+ if (hisi_hba->refclk_frequency_mhz == 66)
+ hisi_sas_phy_write32(hisi_hba, i, PHY_CTRL, 0x199B694);
+ /* else, do nothing -> leave it how you found it */
}
for (i = 0; i < hisi_hba->queue_count; i++) {
--
1.9.1
--
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