Re: [U-Boot] [PATCH 05/16] I2C: Driver changes for FDT support
Hi Minkyu Kang, Thank you for comments.Will correct them On Wed, Dec 26, 2012 at 5:24 PM, Minkyu Kang mk7.k...@samsung.com wrote: Dear Rajeshwari Shinde, On 14/12/12 20:56, Rajeshwari Shinde wrote: Functions added to get the I2C bus number and reset I2C bus using FDT node. Signed-off-by: Rajeshwari Shinde rajeshwar...@samsung.com Acked-by: Simon Glass s...@chromium.org Acked-by: Heiko Schocher h...@denx.de --- Changes in V1: -Rebased on latest u-boot-samsung drivers/i2c/s3c24x0_i2c.c | 83 - drivers/i2c/s3c24x0_i2c.h |8 include/i2c.h | 26 ++ 3 files changed, 116 insertions(+), 1 deletions(-) diff --git a/drivers/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c index 9bc4c7f..94a093e 100644 --- a/drivers/i2c/s3c24x0_i2c.c +++ b/drivers/i2c/s3c24x0_i2c.c @@ -27,9 +27,11 @@ */ #include common.h +#include fdtdec.h #ifdef CONFIG_EXYNOS5 #include asm/arch/clk.h #include asm/arch/cpu.h +#include asm/arch/pinmux.h #else #include asm/arch/s3c24x0_cpu.h #endif @@ -60,7 +62,14 @@ #define I2C_TIMEOUT 1/* 1 second */ -static unsigned int g_current_bus; /* Stores Current I2C Bus */ +/* + * For SPL boot some boards need i2c before SDRAM is initialised so force + * variables to live in SRAM + */ +static unsigned int g_current_bus __attribute__((section(.data))); +static struct s3c24x0_i2c_bus i2c_bus[CONFIG_MAX_I2C_NUM] + __attribute__((section(.data))); +static int i2c_busses __attribute__((section(.data))); #ifndef CONFIG_EXYNOS5 static int GetI2CSDA(void) @@ -507,4 +516,76 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len) (i2c, I2C_WRITE, chip 1, xaddr[4 - alen], alen, buffer, len) != 0); } + +#ifdef CONFIG_OF_CONTROL +void board_i2c_init(const void *blob) +{ + please remove this blank line. + int node_list[CONFIG_MAX_I2C_NUM]; + int count, i; + + count = fdtdec_find_aliases_for_id(blob, i2c, + COMPAT_SAMSUNG_S3C2440_I2C, node_list, + CONFIG_MAX_I2C_NUM); need blank line here. + for (i = 0; i count; i++) { + struct s3c24x0_i2c_bus *bus; + int node = node_list[i]; How handle if the value of count is bigger than CONFIG_MAX_I2C_NUM? + + if (node = 0) + continue; + bus = i2c_bus[i]; + bus-regs = (struct s3c24x0_i2c *) + fdtdec_get_addr(blob, node, reg); + bus-id = pinmux_decode_periph_id(blob, node); + bus-node = node; + bus-bus_num = i2c_busses++; + exynos_pinmux_config(bus-id, 0); + } + please remove this blank line. +} + +static struct s3c24x0_i2c_bus *get_bus(unsigned int bus_idx) +{ + if (bus_idx i2c_busses) + return i2c_bus[bus_idx]; need blank line here. + debug(Undefined bus: %d\n, bus_idx); + return NULL; +} + +int i2c_get_bus_num_fdt(int node) +{ + int i; + + for (i = 0; i i2c_busses; i++) { + if (node == i2c_bus[i].node) + return i; + } + + debug(%s: Can't find any matched I2C bus\n, __func__); + return -1; +} + +int i2c_reset_port_fdt(const void *blob, int node) +{ + struct s3c24x0_i2c_bus *i2c; + Please remove this blank line. + int bus; + + bus = i2c_get_bus_num_fdt(node); + if (bus 0) { + debug(could not get bus for node %d\n, node); + return -1; + } need blank line here. + i2c = get_bus(bus); + if (!i2c) { + debug(get_bus() failed for node node %d\n, node); + return -1; + } + + i2c_ch_init(i2c-regs, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + + return 0; +} +#endif + #endif /* CONFIG_HARD_I2C */ diff --git a/drivers/i2c/s3c24x0_i2c.h b/drivers/i2c/s3c24x0_i2c.h index 2dd4b06..1243bf1 100644 --- a/drivers/i2c/s3c24x0_i2c.h +++ b/drivers/i2c/s3c24x0_i2c.h @@ -30,4 +30,12 @@ struct s3c24x0_i2c { u32 iicds; u32 iiclc; }; + +struct s3c24x0_i2c_bus { + int node; /* device tree node */ + int bus_num;/* i2c bus number */ + struct s3c24x0_i2c *regs; + enum periph_id id; +}; + #endif /* _S3C24X0_I2C_H */ diff --git a/include/i2c.h b/include/i2c.h index 16f099d..c60d075 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -262,4 +262,30 @@ extern int get_multi_scl_pin(void); extern int get_multi_sda_pin(void); extern int multi_i2c_init(void); #endif + +/** + * Get FDT values for i2c bus. + * + * @param blob Device tree blbo + * @return the number of I2C bus + */ +void board_i2c_init(const
Re: [U-Boot] [PATCH 05/16] I2C: Driver changes for FDT support
Hi Minkyu Kang, On Wed, Dec 26, 2012 at 5:24 PM, Minkyu Kang mk7.k...@samsung.com wrote: Dear Rajeshwari Shinde, On 14/12/12 20:56, Rajeshwari Shinde wrote: Functions added to get the I2C bus number and reset I2C bus using FDT node. Signed-off-by: Rajeshwari Shinde rajeshwar...@samsung.com Acked-by: Simon Glass s...@chromium.org Acked-by: Heiko Schocher h...@denx.de --- Changes in V1: -Rebased on latest u-boot-samsung drivers/i2c/s3c24x0_i2c.c | 83 - drivers/i2c/s3c24x0_i2c.h |8 include/i2c.h | 26 ++ 3 files changed, 116 insertions(+), 1 deletions(-) diff --git a/drivers/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c index 9bc4c7f..94a093e 100644 --- a/drivers/i2c/s3c24x0_i2c.c +++ b/drivers/i2c/s3c24x0_i2c.c @@ -27,9 +27,11 @@ */ #include common.h +#include fdtdec.h #ifdef CONFIG_EXYNOS5 #include asm/arch/clk.h #include asm/arch/cpu.h +#include asm/arch/pinmux.h #else #include asm/arch/s3c24x0_cpu.h #endif @@ -60,7 +62,14 @@ #define I2C_TIMEOUT 1/* 1 second */ -static unsigned int g_current_bus; /* Stores Current I2C Bus */ +/* + * For SPL boot some boards need i2c before SDRAM is initialised so force + * variables to live in SRAM + */ +static unsigned int g_current_bus __attribute__((section(.data))); +static struct s3c24x0_i2c_bus i2c_bus[CONFIG_MAX_I2C_NUM] + __attribute__((section(.data))); +static int i2c_busses __attribute__((section(.data))); #ifndef CONFIG_EXYNOS5 static int GetI2CSDA(void) @@ -507,4 +516,76 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len) (i2c, I2C_WRITE, chip 1, xaddr[4 - alen], alen, buffer, len) != 0); } + +#ifdef CONFIG_OF_CONTROL +void board_i2c_init(const void *blob) +{ + please remove this blank line. + int node_list[CONFIG_MAX_I2C_NUM]; + int count, i; + + count = fdtdec_find_aliases_for_id(blob, i2c, + COMPAT_SAMSUNG_S3C2440_I2C, node_list, + CONFIG_MAX_I2C_NUM); need blank line here. + for (i = 0; i count; i++) { + struct s3c24x0_i2c_bus *bus; + int node = node_list[i]; How handle if the value of count is bigger than CONFIG_MAX_I2C_NUM? CONFIG_MAX_I2C_NUM is maximum number of I2C lines supported. if count bigger than CONFIG_MAX_I2C_NUM then it is error. So you want me to add a check here? + + if (node = 0) + continue; + bus = i2c_bus[i]; + bus-regs = (struct s3c24x0_i2c *) + fdtdec_get_addr(blob, node, reg); + bus-id = pinmux_decode_periph_id(blob, node); + bus-node = node; + bus-bus_num = i2c_busses++; + exynos_pinmux_config(bus-id, 0); + } + please remove this blank line. +} + +static struct s3c24x0_i2c_bus *get_bus(unsigned int bus_idx) +{ + if (bus_idx i2c_busses) + return i2c_bus[bus_idx]; need blank line here. + debug(Undefined bus: %d\n, bus_idx); + return NULL; +} + +int i2c_get_bus_num_fdt(int node) +{ + int i; + + for (i = 0; i i2c_busses; i++) { + if (node == i2c_bus[i].node) + return i; + } + + debug(%s: Can't find any matched I2C bus\n, __func__); + return -1; +} + +int i2c_reset_port_fdt(const void *blob, int node) +{ + struct s3c24x0_i2c_bus *i2c; + Please remove this blank line. + int bus; + + bus = i2c_get_bus_num_fdt(node); + if (bus 0) { + debug(could not get bus for node %d\n, node); + return -1; + } need blank line here. + i2c = get_bus(bus); + if (!i2c) { + debug(get_bus() failed for node node %d\n, node); + return -1; + } + + i2c_ch_init(i2c-regs, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + + return 0; +} +#endif + #endif /* CONFIG_HARD_I2C */ diff --git a/drivers/i2c/s3c24x0_i2c.h b/drivers/i2c/s3c24x0_i2c.h index 2dd4b06..1243bf1 100644 --- a/drivers/i2c/s3c24x0_i2c.h +++ b/drivers/i2c/s3c24x0_i2c.h @@ -30,4 +30,12 @@ struct s3c24x0_i2c { u32 iicds; u32 iiclc; }; + +struct s3c24x0_i2c_bus { + int node; /* device tree node */ + int bus_num;/* i2c bus number */ + struct s3c24x0_i2c *regs; + enum periph_id id; +}; + #endif /* _S3C24X0_I2C_H */ diff --git a/include/i2c.h b/include/i2c.h index 16f099d..c60d075 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -262,4 +262,30 @@ extern int get_multi_scl_pin(void); extern int get_multi_sda_pin(void); extern int multi_i2c_init(void); #endif + +/** + * Get FDT values for i2c
Re: [U-Boot] [PATCH 05/16] I2C: Driver changes for FDT support
On 26 December 2012 21:33, Rajeshwari Birje rajeshwari.bi...@gmail.comwrote: Hi Minkyu Kang, On Wed, Dec 26, 2012 at 5:24 PM, Minkyu Kang mk7.k...@samsung.com wrote: Dear Rajeshwari Shinde, On 14/12/12 20:56, Rajeshwari Shinde wrote: Functions added to get the I2C bus number and reset I2C bus using FDT node. Signed-off-by: Rajeshwari Shinde rajeshwar...@samsung.com Acked-by: Simon Glass s...@chromium.org Acked-by: Heiko Schocher h...@denx.de --- Changes in V1: -Rebased on latest u-boot-samsung drivers/i2c/s3c24x0_i2c.c | 83 - drivers/i2c/s3c24x0_i2c.h |8 include/i2c.h | 26 ++ 3 files changed, 116 insertions(+), 1 deletions(-) diff --git a/drivers/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c index 9bc4c7f..94a093e 100644 --- a/drivers/i2c/s3c24x0_i2c.c +++ b/drivers/i2c/s3c24x0_i2c.c @@ -27,9 +27,11 @@ */ #include common.h +#include fdtdec.h #ifdef CONFIG_EXYNOS5 #include asm/arch/clk.h #include asm/arch/cpu.h +#include asm/arch/pinmux.h #else #include asm/arch/s3c24x0_cpu.h #endif @@ -60,7 +62,14 @@ #define I2C_TIMEOUT 1/* 1 second */ -static unsigned int g_current_bus; /* Stores Current I2C Bus */ +/* + * For SPL boot some boards need i2c before SDRAM is initialised so force + * variables to live in SRAM + */ +static unsigned int g_current_bus __attribute__((section(.data))); +static struct s3c24x0_i2c_bus i2c_bus[CONFIG_MAX_I2C_NUM] + __attribute__((section(.data))); +static int i2c_busses __attribute__((section(.data))); #ifndef CONFIG_EXYNOS5 static int GetI2CSDA(void) @@ -507,4 +516,76 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len) (i2c, I2C_WRITE, chip 1, xaddr[4 - alen], alen, buffer, len) != 0); } + +#ifdef CONFIG_OF_CONTROL +void board_i2c_init(const void *blob) +{ + please remove this blank line. + int node_list[CONFIG_MAX_I2C_NUM]; + int count, i; + + count = fdtdec_find_aliases_for_id(blob, i2c, + COMPAT_SAMSUNG_S3C2440_I2C, node_list, + CONFIG_MAX_I2C_NUM); need blank line here. + for (i = 0; i count; i++) { + struct s3c24x0_i2c_bus *bus; + int node = node_list[i]; How handle if the value of count is bigger than CONFIG_MAX_I2C_NUM? CONFIG_MAX_I2C_NUM is maximum number of I2C lines supported. if count bigger than CONFIG_MAX_I2C_NUM then it is error. So you want me to add a check here? It seems to check at fdtdec_find_aliases_fo_id function. Then OK, enough. + + if (node = 0) + continue; + bus = i2c_bus[i]; + bus-regs = (struct s3c24x0_i2c *) + fdtdec_get_addr(blob, node, reg); + bus-id = pinmux_decode_periph_id(blob, node); + bus-node = node; + bus-bus_num = i2c_busses++; + exynos_pinmux_config(bus-id, 0); + } + please remove this blank line. +} + +static struct s3c24x0_i2c_bus *get_bus(unsigned int bus_idx) +{ + if (bus_idx i2c_busses) + return i2c_bus[bus_idx]; need blank line here. + debug(Undefined bus: %d\n, bus_idx); + return NULL; +} + +int i2c_get_bus_num_fdt(int node) +{ + int i; + + for (i = 0; i i2c_busses; i++) { + if (node == i2c_bus[i].node) + return i; + } + + debug(%s: Can't find any matched I2C bus\n, __func__); + return -1; +} + +int i2c_reset_port_fdt(const void *blob, int node) +{ + struct s3c24x0_i2c_bus *i2c; + Please remove this blank line. + int bus; + + bus = i2c_get_bus_num_fdt(node); + if (bus 0) { + debug(could not get bus for node %d\n, node); + return -1; + } need blank line here. + i2c = get_bus(bus); + if (!i2c) { + debug(get_bus() failed for node node %d\n, node); + return -1; + } + + i2c_ch_init(i2c-regs, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + + return 0; +} +#endif + #endif /* CONFIG_HARD_I2C */ diff --git a/drivers/i2c/s3c24x0_i2c.h b/drivers/i2c/s3c24x0_i2c.h index 2dd4b06..1243bf1 100644 --- a/drivers/i2c/s3c24x0_i2c.h +++ b/drivers/i2c/s3c24x0_i2c.h @@ -30,4 +30,12 @@ struct s3c24x0_i2c { u32 iicds; u32 iiclc; }; + +struct s3c24x0_i2c_bus { + int node; /* device tree node */ + int bus_num;/* i2c bus number */ + struct s3c24x0_i2c *regs; + enum periph_id id; +}; +
[U-Boot] [PATCH 05/16] I2C: Driver changes for FDT support
Functions added to get the I2C bus number and reset I2C bus using FDT node. Signed-off-by: Rajeshwari Shinde rajeshwar...@samsung.com Acked-by: Simon Glass s...@chromium.org Acked-by: Heiko Schocher h...@denx.de --- Changes in V1: -Rebased on latest u-boot-samsung drivers/i2c/s3c24x0_i2c.c | 83 - drivers/i2c/s3c24x0_i2c.h |8 include/i2c.h | 26 ++ 3 files changed, 116 insertions(+), 1 deletions(-) diff --git a/drivers/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c index 9bc4c7f..94a093e 100644 --- a/drivers/i2c/s3c24x0_i2c.c +++ b/drivers/i2c/s3c24x0_i2c.c @@ -27,9 +27,11 @@ */ #include common.h +#include fdtdec.h #ifdef CONFIG_EXYNOS5 #include asm/arch/clk.h #include asm/arch/cpu.h +#include asm/arch/pinmux.h #else #include asm/arch/s3c24x0_cpu.h #endif @@ -60,7 +62,14 @@ #define I2C_TIMEOUT 1 /* 1 second */ -static unsigned int g_current_bus; /* Stores Current I2C Bus */ +/* + * For SPL boot some boards need i2c before SDRAM is initialised so force + * variables to live in SRAM + */ +static unsigned int g_current_bus __attribute__((section(.data))); +static struct s3c24x0_i2c_bus i2c_bus[CONFIG_MAX_I2C_NUM] + __attribute__((section(.data))); +static int i2c_busses __attribute__((section(.data))); #ifndef CONFIG_EXYNOS5 static int GetI2CSDA(void) @@ -507,4 +516,76 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len) (i2c, I2C_WRITE, chip 1, xaddr[4 - alen], alen, buffer, len) != 0); } + +#ifdef CONFIG_OF_CONTROL +void board_i2c_init(const void *blob) +{ + + int node_list[CONFIG_MAX_I2C_NUM]; + int count, i; + + count = fdtdec_find_aliases_for_id(blob, i2c, + COMPAT_SAMSUNG_S3C2440_I2C, node_list, + CONFIG_MAX_I2C_NUM); + for (i = 0; i count; i++) { + struct s3c24x0_i2c_bus *bus; + int node = node_list[i]; + + if (node = 0) + continue; + bus = i2c_bus[i]; + bus-regs = (struct s3c24x0_i2c *) + fdtdec_get_addr(blob, node, reg); + bus-id = pinmux_decode_periph_id(blob, node); + bus-node = node; + bus-bus_num = i2c_busses++; + exynos_pinmux_config(bus-id, 0); + } + +} + +static struct s3c24x0_i2c_bus *get_bus(unsigned int bus_idx) +{ + if (bus_idx i2c_busses) + return i2c_bus[bus_idx]; + debug(Undefined bus: %d\n, bus_idx); + return NULL; +} + +int i2c_get_bus_num_fdt(int node) +{ + int i; + + for (i = 0; i i2c_busses; i++) { + if (node == i2c_bus[i].node) + return i; + } + + debug(%s: Can't find any matched I2C bus\n, __func__); + return -1; +} + +int i2c_reset_port_fdt(const void *blob, int node) +{ + struct s3c24x0_i2c_bus *i2c; + + int bus; + + bus = i2c_get_bus_num_fdt(node); + if (bus 0) { + debug(could not get bus for node %d\n, node); + return -1; + } + i2c = get_bus(bus); + if (!i2c) { + debug(get_bus() failed for node node %d\n, node); + return -1; + } + + i2c_ch_init(i2c-regs, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + + return 0; +} +#endif + #endif /* CONFIG_HARD_I2C */ diff --git a/drivers/i2c/s3c24x0_i2c.h b/drivers/i2c/s3c24x0_i2c.h index 2dd4b06..1243bf1 100644 --- a/drivers/i2c/s3c24x0_i2c.h +++ b/drivers/i2c/s3c24x0_i2c.h @@ -30,4 +30,12 @@ struct s3c24x0_i2c { u32 iicds; u32 iiclc; }; + +struct s3c24x0_i2c_bus { + int node; /* device tree node */ + int bus_num;/* i2c bus number */ + struct s3c24x0_i2c *regs; + enum periph_id id; +}; + #endif /* _S3C24X0_I2C_H */ diff --git a/include/i2c.h b/include/i2c.h index 16f099d..c60d075 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -262,4 +262,30 @@ extern int get_multi_scl_pin(void); extern int get_multi_sda_pin(void); extern int multi_i2c_init(void); #endif + +/** + * Get FDT values for i2c bus. + * + * @param blob Device tree blbo + * @return the number of I2C bus + */ +void board_i2c_init(const void *blob); + +/** + * Find the I2C bus number by given a FDT I2C node. + * + * @param blob Device tree blbo + * @param node FDT I2C node to find + * @return the number of I2C bus (zero based), or -1 on error + */ +int i2c_get_bus_num_fdt(int node); + +/** + * Reset the I2C bus represented by the given a FDT I2C node. + * + * @param blob Device tree blbo + * @param node FDT I2C node to find + * @return 0 if port was reset, -1 if not found + */ +int i2c_reset_port_fdt(const void *blob, int node); #endif /* _I2C_H_ */ -- 1.7.4.4 ___ U-Boot mailing list U-Boot@lists.denx.de