target/linux/ipq806x/patches/0087-tty-serial-msm-Remove-direct-access-to-GSBI.patch

   1 From 025909cbf933cc20c2ff5ea9f87de8e17a739a08 Mon Sep 17 00:00:00 2001
   2 From: Andy Gross <agross@codeaurora.org>
   3 Date: Thu, 24 Apr 2014 11:31:22 -0500
   4 Subject: [PATCH 087/182] tty: serial: msm: Remove direct access to GSBI
   5
   6 This patch removes direct access of the GSBI registers.  GSBI configuration
   7 should be done through the GSBI driver directly.
   8
   9 Signed-off-by: Andy Gross <agross@codeaurora.org>
  10 Signed-off-by: Kumar Gala <galak@codeaurora.org>
  11 ---
  12  drivers/tty/serial/msm_serial.c |   48 ++-------------------------------------
  13  drivers/tty/serial/msm_serial.h |    5 ----
  14  2 files changed, 2 insertions(+), 51 deletions(-)
  15
  16 diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
  17 index 053b98e..778e376 100644
  18 --- a/drivers/tty/serial/msm_serial.c
  19 +++ b/drivers/tty/serial/msm_serial.c
  20 @@ -52,7 +52,6 @@ struct msm_port {
  21         struct clk              *clk;
  22         struct clk              *pclk;
  23         unsigned int            imr;
  24 -       void __iomem            *gsbi_base;
  25         int                     is_uartdm;
  26         unsigned int            old_snap_state;
  27  };
  28 @@ -599,9 +598,7 @@ static const char *msm_type(struct uart_port *port)
  29  static void msm_release_port(struct uart_port *port)
  30  {
  31         struct platform_device *pdev = to_platform_device(port->dev);
  32 -       struct msm_port *msm_port = UART_TO_MSM(port);
  33         struct resource *uart_resource;
  34 -       struct resource *gsbi_resource;
  35         resource_size_t size;
  36
  37         uart_resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  38 @@ -612,28 +609,12 @@ static void msm_release_port(struct uart_port *port)
  39         release_mem_region(port->mapbase, size);
  40         iounmap(port->membase);
  41         port->membase = NULL;
  42 -
  43 -       if (msm_port->gsbi_base) {
  44 -               writel_relaxed(GSBI_PROTOCOL_IDLE,
  45 -                               msm_port->gsbi_base + GSBI_CONTROL);
  46 -
  47 -               gsbi_resource = platform_get_resource(pdev, IORESOURCE_MEM, 1);
  48 -               if (unlikely(!gsbi_resource))
  49 -                       return;
  50 -
  51 -               size = resource_size(gsbi_resource);
  52 -               release_mem_region(gsbi_resource->start, size);
  53 -               iounmap(msm_port->gsbi_base);
  54 -               msm_port->gsbi_base = NULL;
  55 -       }
  56  }
  57
  58  static int msm_request_port(struct uart_port *port)
  59  {
  60 -       struct msm_port *msm_port = UART_TO_MSM(port);
  61         struct platform_device *pdev = to_platform_device(port->dev);
  62         struct resource *uart_resource;
  63 -       struct resource *gsbi_resource;
  64         resource_size_t size;
  65         int ret;
  66
  67 @@ -652,30 +633,8 @@ static int msm_request_port(struct uart_port *port)
  68                 goto fail_release_port;
  69         }
  70
  71 -       gsbi_resource = platform_get_resource(pdev, IORESOURCE_MEM, 1);
  72 -       /* Is this a GSBI-based port? */
  73 -       if (gsbi_resource) {
  74 -               size = resource_size(gsbi_resource);
  75 -
  76 -               if (!request_mem_region(gsbi_resource->start, size,
  77 -                                                "msm_serial")) {
  78 -                       ret = -EBUSY;
  79 -                       goto fail_release_port_membase;
  80 -               }
  81 -
  82 -               msm_port->gsbi_base = ioremap(gsbi_resource->start, size);
  83 -               if (!msm_port->gsbi_base) {
  84 -                       ret = -EBUSY;
  85 -                       goto fail_release_gsbi;
  86 -               }
  87 -       }
  88 -
  89         return 0;
  90
  91 -fail_release_gsbi:
  92 -       release_mem_region(gsbi_resource->start, size);
  93 -fail_release_port_membase:
  94 -       iounmap(port->membase);
  95  fail_release_port:
  96         release_mem_region(port->mapbase, size);
  97         return ret;
  98 @@ -683,7 +642,6 @@ fail_release_port:
  99
 100  static void msm_config_port(struct uart_port *port, int flags)
 101  {
 102 -       struct msm_port *msm_port = UART_TO_MSM(port);
 103         int ret;
 104         if (flags & UART_CONFIG_TYPE) {
 105                 port->type = PORT_MSM;
 106 @@ -691,9 +649,6 @@ static void msm_config_port(struct uart_port *port, int flags)
 107                 if (ret)
 108                         return;
 109         }
 110 -       if (msm_port->gsbi_base)
 111 -               writel_relaxed(GSBI_PROTOCOL_UART,
 112 -                               msm_port->gsbi_base + GSBI_CONTROL);
 113  }
 114
 115  static int msm_verify_port(struct uart_port *port, struct serial_struct *ser)
 116 @@ -1110,6 +1065,7 @@ static struct of_device_id msm_match_table[] = {
 117
 118  static struct platform_driver msm_platform_driver = {
 119         .remove = msm_serial_remove,
 120 +       .probe = msm_serial_probe,
 121         .driver = {
 122                 .name = "msm_serial",
 123                 .owner = THIS_MODULE,
 124 @@ -1125,7 +1081,7 @@ static int __init msm_serial_init(void)
 125         if (unlikely(ret))
 126                 return ret;
 127
 128 -       ret = platform_driver_probe(&msm_platform_driver, msm_serial_probe);
 129 +       ret = platform_driver_register(&msm_platform_driver);
 130         if (unlikely(ret))
 131                 uart_unregister_driver(&msm_uart_driver);
 132
 133 diff --git a/drivers/tty/serial/msm_serial.h b/drivers/tty/serial/msm_serial.h
 134 index 1e9b68b..d98d45e 100644
 135 --- a/drivers/tty/serial/msm_serial.h
 136 +++ b/drivers/tty/serial/msm_serial.h
 137 @@ -109,11 +109,6 @@
 138  #define UART_ISR               0x0014
 139  #define UART_ISR_TX_READY      (1 << 7)
 140
 141 -#define GSBI_CONTROL           0x0
 142 -#define GSBI_PROTOCOL_CODE     0x30
 143 -#define GSBI_PROTOCOL_UART     0x40
 144 -#define GSBI_PROTOCOL_IDLE     0x0
 145 -
 146  #define UARTDM_RXFS            0x50
 147  #define UARTDM_RXFS_BUF_SHIFT  0x7
 148  #define UARTDM_RXFS_BUF_MASK   0x7
 149 --
 150 1.7.10.4
 151