kernel: delete Linux 5.4 config and patches

[openwrt/staging/chunkeey.git] / target / linux / layerscape / patches-5.4 / 808-i2c-0012-i2c-imx-correct-code-of-errata-A-010650-for-layersca.patch

diff --git a/target/linux/layerscape/patches-5.4/808-i2c-0012-i2c-imx-correct-code-of-errata-A-010650-for-layersca.patch b/target/linux/layerscape/patches-5.4/808-i2c-0012-i2c-imx-correct-code-of-errata-A-010650-for-layersca.patch
deleted file mode 100644 (file)
index 7fd505d..0000000
--- a/target/linux/layerscape/patches-5.4/808-i2c-0012-i2c-imx-correct-code-of-errata-A-010650-for-layersca.patch
+++ /dev/null
@@ -1,92 +0,0 @@
-From 27ea8554c8fdcdf1d7aba5ce47630d878ce96691 Mon Sep 17 00:00:00 2001
-From: Biwen Li <biwen.li@nxp.com>
-Date: Thu, 24 Oct 2019 13:14:44 +0800
-Subject: [PATCH] i2c: imx: correct code of errata A-010650 for layerscape
- platform
-
-- Simplify code with helper function i2c_imx_clr_al_bit
-- Fix an error about clearing arbitration lost bit
-- Fix an error that not set I2Cx_IBCR following by
-  the workaround of A-010650 (in step 5)
-
-Reviewed-by: Clark Wang <xiaoning.wang@nxp.com>
-Signed-off-by: Biwen Li <biwen.li@nxp.com>
----
- drivers/i2c/busses/i2c-imx.c | 38 +++++++++++++++++++-------------------
- 1 file changed, 19 insertions(+), 19 deletions(-)
-
---- a/drivers/i2c/busses/i2c-imx.c
-+++ b/drivers/i2c/busses/i2c-imx.c
-@@ -516,6 +516,14 @@ static void i2c_imx_clear_irq(struct imx
-       imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
- }
- 
-+/* Clear arbitration lost bit */
-+static void i2c_imx_clr_al_bit(unsigned int status, struct imx_i2c_struct *i2c_imx)
-+{
-+      status &= ~I2SR_IAL;
-+      status |= (i2c_imx->hwdata->i2sr_clr_opcode & I2SR_IAL);
-+      imx_i2c_write_reg(status, i2c_imx, IMX_I2C_I2SR);
-+}
-+
- static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx, int for_busy)
- {
-       unsigned long orig_jiffies = jiffies;
-@@ -528,7 +536,7 @@ static int i2c_imx_bus_busy(struct imx_i
- 
-               /* check for arbitration lost */
-               if (temp & I2SR_IAL) {
--                      i2c_imx_clear_irq(i2c_imx, I2SR_IAL);
-+                      i2c_imx_clr_al_bit(temp, i2c_imx);
-                       return -EAGAIN;
-               }
- 
-@@ -724,14 +732,6 @@ static void i2c_imx_clr_if_bit(unsigned
-       imx_i2c_write_reg(status, i2c_imx, IMX_I2C_I2SR);
- }
- 
--/* Clear arbitration lost bit */
--static void i2c_imx_clr_al_bit(unsigned int status, struct imx_i2c_struct *i2c_imx)
--{
--      status &= ~I2SR_IAL;
--      status |= (i2c_imx->hwdata->i2sr_clr_opcode & I2SR_IAL);
--      imx_i2c_write_reg(status, i2c_imx, IMX_I2C_I2SR);
--}
--
- static irqreturn_t i2c_imx_master_isr(struct imx_i2c_struct *i2c_imx)
- {
-       unsigned int status;
-@@ -1080,12 +1080,14 @@ static int i2c_imx_recovery_for_layersca
-       gpio_set_value(i2c_imx->gpio, 1);
- 
-       /*
--       * Set I2Cx_IBCR = 0h00 to generate a STOP and then
--       * set I2Cx_IBCR = 0h80 to reset
-+       * Set I2Cx_IBCR = 0h00 to generate a STOP
-        */
--      temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);
--      temp &= ~(I2CR_MSTA | I2CR_MTX);
--      imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);
-+      imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode, i2c_imx, IMX_I2C_I2CR);
-+
-+      /*
-+       * Set I2Cx_IBCR = 0h80 to reset the I2Cx controller
-+       */
-+      imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode | I2CR_IEN, i2c_imx, IMX_I2C_I2CR);
- 
-       /* Restore the saved value of the register SCFG_RCWPMUXCR0 */
-       if (i2c_imx->need_set_pmuxcr == 1) {
-@@ -1099,10 +1101,9 @@ static int i2c_imx_recovery_for_layersca
-        * I2C_IBSR[IBAL] = 1
-        */
-       temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);
--      if (temp & I2SR_IAL) {
--              temp &= ~I2SR_IAL;
--              imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
--      }
-+      if (temp & I2SR_IAL)
-+              i2c_imx_clr_al_bit(temp, i2c_imx);
-+
-       return 0;
- }
-