From 56242a1fc595d158eddefbb4d6d76e82c2535f55 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Mon, 21 Nov 2011 21:33:18 -0800 Subject: sh: clkfwk: setup clock parent from current register value Some clocks can select its parent clock by CPG register. But it might have been modified by boot-loader or something. This patch removed fixed initial parent clock, and setup it from their current register settings. It works on div6 reparent clocks for now. Signed-off-by: Kuninori Morimoto Signed-off-by: Paul Mundt --- include/linux/sh_clk.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/sh_clk.h b/include/linux/sh_clk.h index a20831cf336a..e834304c0b6a 100644 --- a/include/linux/sh_clk.h +++ b/include/linux/sh_clk.h @@ -131,10 +131,9 @@ int sh_clk_div4_enable_register(struct clk *clks, int nr, int sh_clk_div4_reparent_register(struct clk *clks, int nr, struct clk_div4_table *table); -#define SH_CLK_DIV6_EXT(_parent, _reg, _flags, _parents, \ +#define SH_CLK_DIV6_EXT(_reg, _flags, _parents, \ _num_parents, _src_shift, _src_width) \ { \ - .parent = _parent, \ .enable_reg = (void __iomem *)_reg, \ .flags = _flags, \ .parent_table = _parents, \ @@ -144,7 +143,11 @@ int sh_clk_div4_reparent_register(struct clk *clks, int nr, } #define SH_CLK_DIV6(_parent, _reg, _flags) \ - SH_CLK_DIV6_EXT(_parent, _reg, _flags, NULL, 0, 0, 0) +{ \ + .parent = _parent, \ + .enable_reg = (void __iomem *)_reg, \ + .flags = _flags, \ +} int sh_clk_div6_register(struct clk *clks, int nr); int sh_clk_div6_reparent_register(struct clk *clks, int nr); -- cgit v1.2.3 From eda2030a5b60bb818f062adacbcfb6fd2d366fb9 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Thu, 8 Dec 2011 22:58:54 +0900 Subject: sh: extend clock struct with mapped_reg member Add a "mapped_reg" member to struct clk and use that to keep the ioremapped register based on enable_reg. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- include/linux/sh_clk.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/sh_clk.h b/include/linux/sh_clk.h index e834304c0b6a..54341d811685 100644 --- a/include/linux/sh_clk.h +++ b/include/linux/sh_clk.h @@ -49,6 +49,7 @@ struct clk { void __iomem *enable_reg; unsigned int enable_bit; + void __iomem *mapped_reg; unsigned long arch_flags; void *priv; -- cgit v1.2.3 From b0e10211cba1629e2e534ca9cb3d87cfc7e389ea Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Fri, 9 Dec 2011 12:14:27 +0900 Subject: sh: pfc: ioremap() support Add support for non-entity mapped PFC registers through the use of struct resource and ioremap()/iounmap(). The PFC main data structure gets updated with a pointer to a struct resources array that point out all register windows used by the PFC instance. The register definitions are kept as physical addresses but the PFC code will do transparent conversion into virtual addresses whenever register windows are specified using with struct resource. To introduce as little performance penalty as possible the virtual address of each data register is cached in memory. The virtual address of each configuration register is however calculated during run time. This because the configuration is considered slow path so focus is instead put on keeping memory foot print as small as possible. The PFC register access code is in this patch updated from __raw_readN() / __raw_writeN() into ioreadN() / iowriteN(). This patch is needed to support the PFC block in r8a7779. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- include/linux/sh_pfc.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux') diff --git a/include/linux/sh_pfc.h b/include/linux/sh_pfc.h index 8446789216e5..91666a58529d 100644 --- a/include/linux/sh_pfc.h +++ b/include/linux/sh_pfc.h @@ -55,6 +55,7 @@ struct pinmux_cfg_reg { struct pinmux_data_reg { unsigned long reg, reg_width, reg_shadow; pinmux_enum_t *enum_ids; + void __iomem *mapped_reg; }; #define PINMUX_DATA_REG(name, r, r_width) \ @@ -75,6 +76,12 @@ struct pinmux_range { pinmux_enum_t force; }; +struct pfc_window { + phys_addr_t phys; + void __iomem *virt; + unsigned long size; +}; + struct pinmux_info { char *name; pinmux_enum_t reserved_id; @@ -98,6 +105,10 @@ struct pinmux_info { struct pinmux_irq *gpio_irq; unsigned int gpio_irq_size; + struct resource *resource; + unsigned int num_resources; + struct pfc_window *window; + struct gpio_chip chip; }; -- cgit v1.2.3 From f78a26f55b2438c439609fc90b473f7f08f5b697 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Wed, 14 Dec 2011 01:01:05 +0900 Subject: sh: pfc: Variable bitfield width config register support Add support for variable config reg hardware by adding the macro PINMUX_CFG_REG_VAR(). The width of each bitfield needs to be passed to the macro, and the correct space must be consumed by each bitfield in the enum table following the macro. Data registers still need to have fixed bitfields. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- include/linux/sh_pfc.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/sh_pfc.h b/include/linux/sh_pfc.h index 91666a58529d..84538c42d64a 100644 --- a/include/linux/sh_pfc.h +++ b/include/linux/sh_pfc.h @@ -45,12 +45,19 @@ struct pinmux_cfg_reg { unsigned long reg, reg_width, field_width; unsigned long *cnt; pinmux_enum_t *enum_ids; + unsigned long *var_field_width; }; #define PINMUX_CFG_REG(name, r, r_width, f_width) \ .reg = r, .reg_width = r_width, .field_width = f_width, \ .cnt = (unsigned long [r_width / f_width]) {}, \ - .enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) \ + .enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) + +#define PINMUX_CFG_REG_VAR(name, r, r_width, var_fw0, var_fwn...) \ + .reg = r, .reg_width = r_width, \ + .cnt = (unsigned long [r_width]) {}, \ + .var_field_width = (unsigned long [r_width]) { var_fw0, var_fwn, 0 }, \ + .enum_ids = (pinmux_enum_t []) struct pinmux_data_reg { unsigned long reg, reg_width, reg_shadow; -- cgit v1.2.3 From e499ada829cf769ac6f16627cd9f09b855a7fd6d Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Wed, 14 Dec 2011 01:01:14 +0900 Subject: sh: pfc: Unlock register support Add PFC support for a 32-bit unlock register. Needed to drive the r8a7779 PFC that comes with a funky PMMR register. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- include/linux/sh_pfc.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/sh_pfc.h b/include/linux/sh_pfc.h index 84538c42d64a..5c15aed9c4b2 100644 --- a/include/linux/sh_pfc.h +++ b/include/linux/sh_pfc.h @@ -116,6 +116,8 @@ struct pinmux_info { unsigned int num_resources; struct pfc_window *window; + unsigned long unlock_reg; + struct gpio_chip chip; }; -- cgit v1.2.3