ARM: OMAP: hwmod data: Add support for AM35xx UART4/ttyO3

Add hwmod support to enable access to UART4 of the AM35xx series of
chips.  The UART4 device referenced from the TRM will show up as ttyO3.

This was tested on an AM3505.

Signed-off-by: Kyle Manna <kyle.manna@fuel7.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>

diff --git a/arch/arm/mach-omap2/clock3xxx_data.c b/arch/arm/mach-omap2/clock3xxx_data.c
index 5d0064a4fb5a638bb1141489354244e95899c1a1..4e1b1a2f0537808d08437f0ea36571ba35580cbb 100644 (file)
--- a/arch/arm/mach-omap2/clock3xxx_data.c
+++ b/arch/arm/mach-omap2/clock3xxx_data.c
@@ -2480,6 +2480,16 @@ static struct clk uart4_fck = {
        .recalc         = &followparent_recalc,
 };
 
+static struct clk uart4_fck_am35xx = {
+       .name           = "uart4_fck",
+       .ops            = &clkops_omap2_dflt_wait,
+       .parent         = &per_48m_fck,
+       .enable_reg     = OMAP_CM_REGADDR(CORE_MOD, CM_FCLKEN1),
+       .enable_bit     = OMAP3430_EN_UART4_SHIFT,
+       .clkdm_name     = "core_l4_clkdm",
+       .recalc         = &followparent_recalc,
+};
+
 static struct clk gpt2_fck = {
        .name           = "gpt2_fck",
        .ops            = &clkops_omap2_dflt_wait,
@@ -3403,6 +3413,7 @@ static struct omap_clk omap3xxx_clks[] = {
        CLK(NULL,       "per_48m_fck",  &per_48m_fck,   CK_3XXX),
        CLK(NULL,       "uart3_fck",    &uart3_fck,     CK_3XXX),
        CLK(NULL,       "uart4_fck",    &uart4_fck,     CK_36XX),
+       CLK(NULL,       "uart4_fck",    &uart4_fck_am35xx, CK_3505 | CK_3517),
        CLK(NULL,       "gpt2_fck",     &gpt2_fck,      CK_3XXX),
        CLK(NULL,       "gpt3_fck",     &gpt3_fck,      CK_3XXX),
        CLK(NULL,       "gpt4_fck",     &gpt4_fck,      CK_3XXX),

diff --git a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
index 126cb49c0de774eb298455c221c1d4add8c034da..3be90feca77c8d0e0e472cf7c65dfe40f11ccdb1 100644 (file)
--- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
@@ -164,6 +164,7 @@ static struct omap_hwmod omap3xxx_uart1_hwmod;
 static struct omap_hwmod omap3xxx_uart2_hwmod;
 static struct omap_hwmod omap3xxx_uart3_hwmod;
 static struct omap_hwmod omap3xxx_uart4_hwmod;
+static struct omap_hwmod am35xx_uart4_hwmod;
 static struct omap_hwmod omap3xxx_usbhsotg_hwmod;
 
 /* l3_core -> usbhsotg interface */
@@ -299,6 +300,23 @@ static struct omap_hwmod_ocp_if omap3_l4_per__uart4 = {
        .user           = OCP_USER_MPU | OCP_USER_SDMA,
 };
 
+/* AM35xx: L4 CORE -> UART4 interface */
+static struct omap_hwmod_addr_space am35xx_uart4_addr_space[] = {
+       {
+               .pa_start       = OMAP3_UART4_AM35XX_BASE,
+               .pa_end         = OMAP3_UART4_AM35XX_BASE + SZ_1K - 1,
+               .flags          = ADDR_MAP_ON_INIT | ADDR_TYPE_RT,
+       },
+};
+
+static struct omap_hwmod_ocp_if am35xx_l4_core__uart4 = {
+       .master         = &omap3xxx_l4_core_hwmod,
+       .slave          = &am35xx_uart4_hwmod,
+       .clk            = "uart4_ick",
+       .addr           = am35xx_uart4_addr_space,
+       .user           = OCP_USER_MPU | OCP_USER_SDMA,
+};
+
 /* L4 CORE -> I2C1 interface */
 static struct omap_hwmod_ocp_if omap3_l4_core__i2c1 = {
        .master         = &omap3xxx_l4_core_hwmod,
@@ -1309,6 +1327,39 @@ static struct omap_hwmod omap3xxx_uart4_hwmod = {
        .class          = &omap2_uart_class,
 };
 
+static struct omap_hwmod_irq_info am35xx_uart4_mpu_irqs[] = {
+       { .irq = INT_35XX_UART4_IRQ, },
+};
+
+static struct omap_hwmod_dma_info am35xx_uart4_sdma_reqs[] = {
+       { .name = "rx", .dma_req = AM35XX_DMA_UART4_RX, },
+       { .name = "tx", .dma_req = AM35XX_DMA_UART4_TX, },
+};
+
+static struct omap_hwmod_ocp_if *am35xx_uart4_slaves[] = {
+       &am35xx_l4_core__uart4,
+};
+
+static struct omap_hwmod am35xx_uart4_hwmod = {
+       .name           = "uart4",
+       .mpu_irqs       = am35xx_uart4_mpu_irqs,
+       .sdma_reqs      = am35xx_uart4_sdma_reqs,
+       .main_clk       = "uart4_fck",
+       .prcm           = {
+               .omap2 = {
+                       .module_offs = CORE_MOD,
+                       .prcm_reg_id = 1,
+                       .module_bit = OMAP3430_EN_UART4_SHIFT,
+                       .idlest_reg_id = 1,
+                       .idlest_idle_bit = OMAP3430_EN_UART4_SHIFT,
+               },
+       },
+       .slaves         = am35xx_uart4_slaves,
+       .slaves_cnt     = ARRAY_SIZE(am35xx_uart4_slaves),
+       .class          = &omap2_uart_class,
+};
+
+
 static struct omap_hwmod_class i2c_class = {
        .name   = "i2c",
        .sysc   = &i2c_sysc,
@@ -3287,6 +3338,7 @@ static __initdata struct omap_hwmod *omap36xx_hwmods[] = {
 static __initdata struct omap_hwmod *am35xx_hwmods[] = {
        &omap3xxx_dss_core_hwmod, /* XXX ??? */
        &am35xx_usbhsotg_hwmod,
+       &am35xx_uart4_hwmod,
        NULL
 };
 

diff --git a/arch/arm/mach-omap2/prcm-common.h b/arch/arm/mach-omap2/prcm-common.h
index 0363dcb0ef931aa57aba6dbee6f60dd9fef11f57..da2d80f5fcbdf809637506088a57a1ab7eefc444 100644 (file)
--- a/arch/arm/mach-omap2/prcm-common.h
+++ b/arch/arm/mach-omap2/prcm-common.h
@@ -201,6 +201,8 @@
 #define OMAP3430_EN_MMC2_SHIFT                         25
 #define OMAP3430_EN_MMC1_MASK                          (1 << 24)
 #define OMAP3430_EN_MMC1_SHIFT                         24
+#define OMAP3430_EN_UART4_MASK                         (1 << 23)
+#define OMAP3430_EN_UART4_SHIFT                                23
 #define OMAP3430_EN_MCSPI4_MASK                                (1 << 21)
 #define OMAP3430_EN_MCSPI4_SHIFT                       21
 #define OMAP3430_EN_MCSPI3_MASK                                (1 << 20)

diff --git a/arch/arm/plat-omap/include/plat/irqs.h b/arch/arm/plat-omap/include/plat/irqs.h
index 30e10719b774853e2247badf8a414111408c8fac..6e5d3a0cb9d52245f4f00fc72ba73c76840375c7 100644 (file)
--- a/arch/arm/plat-omap/include/plat/irqs.h
+++ b/arch/arm/plat-omap/include/plat/irqs.h
@@ -357,7 +357,7 @@
 #define INT_35XX_EMAC_C0_TX_PULSE_IRQ  69
 #define INT_35XX_EMAC_C0_MISC_PULSE_IRQ        70
 #define INT_35XX_USBOTG_IRQ            71
-#define INT_35XX_UART4                 84
+#define INT_35XX_UART4_IRQ             84
 #define INT_35XX_CCDC_VD0_IRQ          88
 #define INT_35XX_CCDC_VD1_IRQ          92
 #define INT_35XX_CCDC_VD2_IRQ          93

diff --git a/arch/arm/plat-omap/include/plat/serial.h b/arch/arm/plat-omap/include/plat/serial.h
index 1ab9fd6abe6de8e837e06260fbb58ff03f6b4d6f..865a2ba7ffa89ab63581a0cc8819acdbe048e141 100644 (file)
--- a/arch/arm/plat-omap/include/plat/serial.h
+++ b/arch/arm/plat-omap/include/plat/serial.h
@@ -44,6 +44,7 @@
 #define OMAP3_UART2_BASE       OMAP2_UART2_BASE
 #define OMAP3_UART3_BASE       0x49020000
 #define OMAP3_UART4_BASE       0x49042000      /* Only on 36xx */
+#define OMAP3_UART4_AM35XX_BASE        0x4809E000      /* Only on AM35xx */
 
 /* OMAP4 serial ports */
 #define OMAP4_UART1_BASE       OMAP2_UART1_BASE