Merge patch series "ufs-exynos support for Tensor GS101"

Peter Griffin <peter.griffin@linaro.org> says:

Hi Martin, James & Alim,

This series adds support to the ufs-exynos driver for Tensor gs101
found in Pixel 6. It was send previously in [1] and [2] but included
the other clock, phy and DTS parts. This series has been split into
just the ufs-exynos part to hopefully make things easier.

With this series, plus the phy, clock and dts changes UFS is
functional upstream for Pixel 6. The SKhynix HN8T05BZGKX015 can be
enumerated, partitions mounted etc.

The series is split into some prepatory patches for ufs-exynos and a
final patch that adds the gs101 support.

Note the sysreg clock has been moved to ufs node as fine grained clock
control around the syscon sysreg register accesses doesn't result in
functional UFS.

regards,

Peter

Link: https://lore.kernel.org/r/20240426122004.2249178-1-peter.griffin@linaro.orgSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml

@@ -12,12 +12,10 @@ maintainers:
 description: |
   Each Samsung UFS host controller instance should have its own node.
 
-allOf:
-  - $ref: ufs-common.yaml
-
 properties:
   compatible:
     enum:
+      - google,gs101-ufs
       - samsung,exynos7-ufs
       - samsung,exynosautov9-ufs
       - samsung,exynosautov9-ufs-vh
@@ -38,14 +36,24 @@ properties:
       - const: ufsp
 
   clocks:
+    minItems: 2
     items:
       - description: ufs link core clock
       - description: unipro main clock
+      - description: fmp clock
+      - description: ufs aclk clock
+      - description: ufs pclk clock
+      - description: sysreg clock
 
   clock-names:
+    minItems: 2
     items:
       - const: core_clk
       - const: sclk_unipro_main
+      - const: fmp
+      - const: aclk
+      - const: pclk
+      - const: sysreg
 
   phys:
     maxItems: 1
@@ -72,6 +80,30 @@ required:
   - clocks
   - clock-names
 
+allOf:
+  - $ref: ufs-common.yaml
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: google,gs101-ufs
+
+    then:
+      properties:
+        clocks:
+          minItems: 6
+
+        clock-names:
+          minItems: 6
+
+    else:
+      properties:
+        clocks:
+          maxItems: 2
+
+        clock-names:
+          maxItems: 2
+
 unevaluatedProperties: false
 
 examples:

drivers/ufs/host/ufs-exynos.h

@@ -9,6 +9,12 @@
 #ifndef _UFS_EXYNOS_H_
 #define _UFS_EXYNOS_H_
 
+/*
+ * Component registers
+ */
+
+#define COMP_CLK_PERIOD	0x44
+
 /*
  * UNIPRO registers
  */
@@ -29,6 +35,14 @@
 #define PA_DBG_OPTION_SUITE	0x9564
 #define PA_DBG_OPTION_SUITE_DYN	0x9565
 
+/*
+ * Note: GS101_DBG_OPTION offsets below differ from the TRM
+ * but match the downstream driver. Following the TRM
+ * results in non-functioning UFS.
+ */
+#define PA_GS101_DBG_OPTION_SUITE1 0x956a
+#define PA_GS101_DBG_OPTION_SUITE2 0x956d
+
 /*
  * MIBs for Transport Layer debug registers
  */
@@ -116,7 +130,7 @@ struct exynos_ufs;
 #define PA_HIBERN8TIME_VAL	0x20
 
 #define PCLK_AVAIL_MIN	70000000
-#define PCLK_AVAIL_MAX	167000000
+#define PCLK_AVAIL_MAX	267000000
 
 struct exynos_ufs_uic_attr {
 	/* TX Attributes */
@@ -145,7 +159,11 @@ struct exynos_ufs_uic_attr {
 	/* Common Attributes */
 	unsigned int cmn_pwm_clk_ctrl;
 	/* Internal Attributes */
-	unsigned int pa_dbg_option_suite;
+	unsigned int pa_dbg_clk_period_off;
+	unsigned int pa_dbg_opt_suite1_val;
+	unsigned int pa_dbg_opt_suite1_off;
+	unsigned int pa_dbg_opt_suite2_val;
+	unsigned int pa_dbg_opt_suite2_off;
 	/* Changeable Attributes */
 	unsigned int rx_adv_fine_gran_sup_en;
 	unsigned int rx_adv_fine_gran_step;
@@ -221,6 +239,8 @@ struct exynos_ufs {
 #define EXYNOS_UFS_OPT_BROKEN_RX_SEL_IDX	BIT(3)
 #define EXYNOS_UFS_OPT_USE_SW_HIBERN8_TIMER	BIT(4)
 #define EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR	BIT(5)
+#define EXYNOS_UFS_OPT_UFSPR_SECURE		BIT(6)
+#define EXYNOS_UFS_OPT_TIMER_TICK_SELECT	BIT(7)
 };
 
 #define for_each_ufs_rx_lane(ufs, i) \