mediatek: backport upstream mediatek patches

[openwrt/staging/blogic.git] / target / linux / mediatek / patches-4.14 / 0118-soc-mediatek-pwrap-add-pwrap_write32-for-writing-in-.patch

diff --git a/target/linux/mediatek/patches-4.14/0118-soc-mediatek-pwrap-add-pwrap_write32-for-writing-in-.patch b/target/linux/mediatek/patches-4.14/0118-soc-mediatek-pwrap-add-pwrap_write32-for-writing-in-.patch
new file mode 100644 (file)
index 0000000..6048d6e
--- /dev/null
+++ b/target/linux/mediatek/patches-4.14/0118-soc-mediatek-pwrap-add-pwrap_write32-for-writing-in-.patch
@@ -0,0 +1,137 @@
+From 635f800995e4ea2a18ce7520d816dab018ce091f Mon Sep 17 00:00:00 2001
+From: Sean Wang <sean.wang@mediatek.com>
+Date: Wed, 18 Oct 2017 16:28:44 +0800
+Subject: [PATCH 118/224] soc: mediatek: pwrap: add pwrap_write32 for writing
+ in 32-bit mode
+
+Some regulators such as MediaTek MT6380 also has to be written in
+32-bit mode. So the patch adds pwrap_write32, rename old pwrap_write
+into pwrap_write16 and one additional function pointer is introduced
+for increasing flexibility allowing the determination which mode is
+used by the pwrap slave detection through device tree.
+
+Signed-off-by: Chenglin Xu <chenglin.xu@mediatek.com>
+Signed-off-by: Chen Zhong <chen.zhong@mediatek.com>
+Signed-off-by: Sean Wang <sean.wang@mediatek.com>
+Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
+---
+ drivers/soc/mediatek/mtk-pmic-wrap.c | 70 +++++++++++++++++++++++++++---------
+ 1 file changed, 54 insertions(+), 16 deletions(-)
+
+diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
+index 06930e2ebe4c..2d3a8faae124 100644
+--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
++++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
+@@ -507,6 +507,7 @@ struct pwrap_slv_type {
+        * which type is used by the detection through device tree.
+        */
+       int (*pwrap_read)(struct pmic_wrapper *wrp, u32 adr, u32 *rdata);
++      int (*pwrap_write)(struct pmic_wrapper *wrp, u32 adr, u32 wdata);
+ };
+ 
+ struct pmic_wrapper {
+@@ -601,22 +602,6 @@ static int pwrap_wait_for_state(struct pmic_wrapper *wrp,
+       } while (1);
+ }
+ 
+-static int pwrap_write(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
+-{
+-      int ret;
+-
+-      ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
+-      if (ret) {
+-              pwrap_leave_fsm_vldclr(wrp);
+-              return ret;
+-      }
+-
+-      pwrap_writel(wrp, (1 << 31) | ((adr >> 1) << 16) | wdata,
+-                      PWRAP_WACS2_CMD);
+-
+-      return 0;
+-}
+-
+ static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
+ {
+       int ret;
+@@ -673,6 +658,56 @@ static int pwrap_read(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
+       return wrp->slave->pwrap_read(wrp, adr, rdata);
+ }
+ 
++static int pwrap_write16(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
++{
++      int ret;
++
++      ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
++      if (ret) {
++              pwrap_leave_fsm_vldclr(wrp);
++              return ret;
++      }
++
++      pwrap_writel(wrp, (1 << 31) | ((adr >> 1) << 16) | wdata,
++                   PWRAP_WACS2_CMD);
++
++      return 0;
++}
++
++static int pwrap_write32(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
++{
++      int ret, msb, rdata;
++
++      for (msb = 0; msb < 2; msb++) {
++              ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
++              if (ret) {
++                      pwrap_leave_fsm_vldclr(wrp);
++                      return ret;
++              }
++
++              pwrap_writel(wrp, (1 << 31) | (msb << 30) | (adr << 16) |
++                           ((wdata >> (msb * 16)) & 0xffff),
++                           PWRAP_WACS2_CMD);
++
++              /*
++               * The pwrap_read operation is the requirement of hardware used
++               * for the synchronization between two successive 16-bit
++               * pwrap_writel operations composing one 32-bit bus writing.
++               * Otherwise, we'll find the result fails on the lower 16-bit
++               * pwrap writing.
++               */
++              if (!msb)
++                      pwrap_read(wrp, adr, &rdata);
++      }
++
++      return 0;
++}
++
++static int pwrap_write(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
++{
++      return wrp->slave->pwrap_write(wrp, adr, wdata);
++}
++
+ static int pwrap_regmap_read(void *context, u32 adr, u32 *rdata)
+ {
+       return pwrap_read(context, adr, rdata);
+@@ -1082,18 +1117,21 @@ static const struct pwrap_slv_type pmic_mt6323 = {
+       .dew_regs = mt6323_regs,
+       .type = PMIC_MT6323,
+       .pwrap_read = pwrap_read16,
++      .pwrap_write = pwrap_write16,
+ };
+ 
+ static const struct pwrap_slv_type pmic_mt6380 = {
+       .dew_regs = NULL,
+       .type = PMIC_MT6380,
+       .pwrap_read = pwrap_read32,
++      .pwrap_write = pwrap_write32,
+ };
+ 
+ static const struct pwrap_slv_type pmic_mt6397 = {
+       .dew_regs = mt6397_regs,
+       .type = PMIC_MT6397,
+       .pwrap_read = pwrap_read16,
++      .pwrap_write = pwrap_write16,
+ };
+ 
+ static const struct of_device_id of_slave_match_tbl[] = {
+-- 
+2.11.0
+